Features
- Five jumper-selectable resistance ranges of 20.000 ohm to 200.00 kohm
- Three fixed factory-special ranges of 2.0000 ohm, 2.0000 Mohm, 20.000 Mohm
- Accuracy at 25°C ±0.01% of reading ± 2 counts
- 0.1 milliohm resolution on 2 ohm scale for contact resistance measurements
- 2, 3 or 4-wire connection with lead resistance compensation
- All input ranges are user selectable and factory calibrated
- Up to 60 conversions per second, Ideal for peak or valley capture
- Digital span adjust from 0 to ±99,999, zero adjust from -99,999 to +99,999
- Front panel scalable to ±99,999 for use with current shunts
- 1/8 DIN size with bright red or green 0.56" (14.2mm), high LED digits
- Power 85-264 Vac / 90-300 Vdc or 10-48 Vdc / 12-32 Vac (isolated)
- Operating temperature from -40°C to 70°C (-40°F to 158°F)
- Wide choice of Plug-in-Play options:
- 2 or 4 relays, mechanical or solid state, for alarm or control (isolated)
- 1 or 2 Analog output, 4-20 mA, 0-20 mA, 0-10V, or -10V to +10V (isolated)
- Communications: Ethernet, WiFi, USB, RS232, RS485 (isolated)
- Extended DPM allows up to 180 data points to linearize and scale
Certificates of Compliance
The Laureate™ 1/8 DIN Digital Panel Meters, Ohmmeter for resistance in Ohms
is ideal for high-speed, high-accuracy resistance measurements in a production environment, such as contact resistance measurements. It is factory calibrated for five jumper selectable resistance ranges from 20.000 ohm to 200.00 kohm. Fixed, factory-special ranges of 2.0000 ohm, 2.0000 Mohm and 20.000 Mohm are also available. Accuracy is an exceptional ±0.01% of reading ± 2 counts. Resolution is one part in 20,000. In the 2 ohm range, resolution is 0.1 milliohm, making the meter suitable for contact resistance measurements.The optional extended Laureate computer board enhances Laureate Digital Panel Meters by displaying rates derived from successive readings and enabling highly accurate custom curve linearization. For example, it can calculate liquid volume or flow rate in a horizontal cylindrical tank using levels from a 4-20 mA transmitter. Setup is straightforward: users input up to 180 data points into a spreadsheet or text file, and the computer calculates spline-fit segments, which are then downloaded to the meter for precise operation.
Meter connections can be via 2, 3 or 4 wires. With 4-wire hookup, 2 wires are used for excitation and two separate wires are used to sense the voltage across the resistance to be measured, thereby eliminating any lead resistance effects. With 3-wire hookup, the meter senses the combined voltage drop across the resistance to be measured plus two excitation leads. It also senses the voltage drop across one excitation lead, and then subtracts twice this voltage from the combined total. This technique effectively subtracts lead resistance if the excitation leads are the same.
All resistance ranges are factory-calibrated, with calibration factors for each range securely stored in an onboard EEPROM. These factors can be scaled via software to accommodate external shunts, enabling field replacement of signal conditioner boards without necessitating recalibration of the associated digital panel meters. For optimal accuracy, factory recalibration is recommended annually. All Laurel Electronics instruments undergo factory calibration using the industry-leading Fluke calibrators, which are recalibrated yearly and certified traceable to national standards, ensuring the highest level of precision and reliability.
Laureate Digital Panel Meters are easily programmed with Laurel’s free Instrument Setup Software, downloadable from our website and compatible with Windows PCs, requiring a data interface board for setup.
High read rate of up to 50 or 60 conversions per second, the Laureate™ Digital Panel Meters use a Concurrent Slope (US Pat. 5,262,780) analog-to-digital conversion to integrate signals over a full power line cycle (50 Hz or 60 Hz). This read rate enables peak and valley capture, real-time computer interfacing, and control applications. Peak and valley values are automatically captured and can be viewed using Laurel’s free Instrument Setup Software (compatible with Windows PCs) or transmitted as serial data.
Digital signal filtering modes can be selected to ensure stable readings in electrically noisy environments.
- An unfiltered selection provides true peak and valley readings and aids in control applications.
- A batch average filter selection averages each 16 conversions.
- An adaptive moving average filter selection provides a choice of 8 time constants from 80 ms to 9.6 seconds. When a significant change in signal level occurs, the filter adapts by briefly switching to the shortest time to follow the change, then reverts back to its selected time constant. An Auto setting selects the time constant selection based on signal noise.
Two tare functions: auto-tare and manual tare. In auto-tare, an input line is grounded by an external pushbutton. This causes the current weight, which is normally the empty weight of the container to be stored in memory as an offset. In manual tare, the tare value can be entered manually via the front panel or a computer using Laurel's free Instrument Setup Software. For instance, the tare value may be the stated empty weight of a truck or rail car. Pressing the Reset button on the front panel toggles the display between gross weight (total weight on the scale) and net weight (gross weight with tare subtracted).
Peak and valley values are automatically captured. These may be displayed via a front panel pushbutton command or control signal at the rear connector, or be transmitted as serial data.
Two rear panel control Inputs (CMOS/TTL levels, logic 0 = tied to digital ground, logic 1 = open) or dry contacts that can be set to control / activate 14 meter commands.
Resistance Measurement with Excitation & Lead Compensation
| Ohmmeter hookup can be via 2, 3 or 4 wires to the J5 connector. The meter applies a fixed excitation current for each resistance range. | |
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In 4-wire hookup, different pairs of leads are used to apply the excitation current and sense the voltage drop across the unknown resistance, so that the IR drop across the excitation leads is not a factor. |
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In 3-wire hookup, the meter senses the combined voltage drop across the unknown resistance plus two excitation leads. It also senses the voltage drop across one excitation lead, and then subtracts twice this voltage from the combined total. This technique effectively subtracts all lead resistance and compensates for ambient temperature changes if the two excitation leads are identical. |
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In 2-wire hookup, the meter senses the combined voltage drop across the unknown resistance and both lead wires. The voltage drop across the lead wires can be measured by shorting out the resistance during meter setup, and this voltage is then automatically subtracted from the combined total. However, changing resistance of the lead wires due to ambient temperature changes will not be compensated. |
QA Application with Relay Option in Passband Mode
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A deviation limit (50 mohm in this example) is set up around both sides of a setpoint. The relay closes (or opens) when the reading falls within the deviation band, and opens (or closes) when the reading falls outside of this band. This mode sets up a passband around the setpoint and can be used for contact resistance testing.
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Modular Design for Maximum Flexibility at Minimum Cost
All boards are isolated from meter and power grounds. Optional Plug-in-Play boards for communications and control include Ethernet, WiFi, serial communication boards, dual or quad relay boards, and an analog output board. Laureates may be powered from 85-264 Vac or optionally from 12-32 Vac or 10-48 Vdc. The display is available with bright red or green 0.56" (14.2mm) high LED digits. The 1/8 DIN case meets NEMA 4X (IP65) specifications from the front when panel mounted. Any setup functions and front panel keys can be locked out for simplified usage and security. A built-in 5, 10, 12, or 24 Vdc excitation supply can power transducers, eliminating the need for an external power supply. All power and signal connections are via UL / VDE / CSA rated screw clamp plugs.
The Laureate™ Series features modular design with up to 7 isolated plug-in boards, applicable to all Laureate 1/8 DIN Digital Panel Meters.
Modular Hardware
The design of the Laureate™ Series is modular for maximum flexibility at minimum cost. All boards are isolated from meter and power grounds. The base configuration for a panel meter or counter consists of a main module (with computer and plug-in display boards), a power supply board, and a signal conditioner board. Optional plug-in-play boards include an isolated setpoint controller board, an isolated analog output board, and an isolated digital interface board. Modular design and a choice of plug-in options allow the Laureate to be customized for a broad range of applications from simple monitoring to control and computer interface. There can be up to five plug-in boards in a 1/8 DIN Laureate.
Connecting Laureate Digital Panel Meters to a Local Area Network (LAN)
Up to 30 Laureate Digital Panel Meters and/or LT Transmitters can be configured for RS485 and daisy-chained to an LT Transmitter using Laurel’s High Speed Ethernet-to-RS485 converter board for seamless LAN integration. Alternatively, Laurel LTE series Ethernet transmitters can connect directly to a LAN via an Ethernet cable. Setup for both configurations is streamlined using Laurel’s free Instrument Setup Software, which simplifies node discovery and transmitter configuration.
Flexible Communication Options for Digital Panel Meters
Laureate Digital Panel Meters can be equipped with Laurel communication boards to support various interfaces and protocols. These include serial interfaces with ASCII or Modbus RTU protocols, and Ethernet interfaces with web access, ASCII, or Modbus TCP/IP protocols, ensuring versatile connectivity for your commercial applications.
| Range | Ohms | Resolution | Accuracy | Excitation Current *** |
|---|---|---|---|---|
| R0** | 0-2.0000 Ω | 0.1 mΩ | ±0.01% of reading ± 2 counts |
5 mA |
| R1* | 0-20.000 Ω | 1 mΩ | 5 mA | |
| R2* | 0-200.00 Ω | 10 mΩ | 500 µA | |
| R3* | 0-2000.0 Ω | 100 mΩ | 50 µA | |
| R4* | 0-20000 Ω | 1 Ω | 5 µA | |
| R5* | 0-200.00 kΩ | 10 Ω | 500 nA | |
| R6** | 0-2.0000 MΩ | 100 Ω | 500 nA | |
| R7** | 0-20.0000 MΩ | 1000 Ω | 80 nA | |
| * Jumper-selectable, precalibrated range. | ||||
| ** Factory-set fixed range. | ||||
| *** The applied excitation current is sensed by the meter, which operates in a ratiometric mode and automatically compensates for any changes in excitation. | ||||
| Recalibration: All ranges are calibrated at the factory. Recalibration is recommended every 12 months. | ||||
| Display | |
|---|---|
| Readout | 5 LED digits, 7-segment, 14.2 mm (.56") |
| Color | Red or green LED |
| Indicators | 2 red LED lamps |
| Accuracy | |
| Accuracy at 25°C | ±0.01% of reading ± 2 counts |
| Span tempco | ±0.003% of reading/°C |
| Electrical | |
| Connection | 2, 3 or 4-wire |
| Max applied voltage | 100 mV |
| Overvoltage protection | 125 Vac |
| Open sensor indication | Flashes full-scale |
| A-to-D Conversion | |
| Technique | Concurrent Slope (Pat 5,262,780) |
| A-to-D rate | 60/s at 60 Hz, 50/s at 50 Hz |
| Output update rate | 56/s at 60 Hz, 47/s at 50 Hz |
| Display update rate | 3.5/s at 60 Hz, 3/s at 50 Hz |
| Power Supply Boards (one required) | |
| Voltage, standard | 85-264 Vac or 90-300 Vdc |
| Voltage, optional | 12-32 Vac or 10-48 Vdc |
| Frequency | DC or 47-63 Hz |
| Power consumption (typical, base meter) | 1.2W @ 120 Vac, 1.5W @ 240 Vac, 1.3W @ 10 Vdc, 1.4W @ 20 Vdc, 1.55W @ 30 Vdc, 1.8W @ 40 Vdc, 2.15W @ 48 Vdc |
| Power Isolation | 250V rms working, 2.3 kV rms per 1 min test |
| Analog Output Board (one optional) | |
| Output levels | 4-20 mA, 0-20 mA, 0-10V, -10 to +10V (jumper selectable) |
| Current compliance | 2 mA at 10V ( > 5 kΩ load) |
| Voltage compliance | 12V at 20 mA (< 600 Ω load) |
| Scaling | Zero and full scale adjustable from -99999 to +99999 |
| Resolution | 16 bits (0.0015% of full scale) |
| Step function response | 80 ms to 99% of final value (typ) |
| Isolation | 250V rms working, 2.3 kV rms per 1 min test |
| Relay Output Boards (one optional) | |
| Dual magnetic relays | 2 Form C, 10A max, 440Vac or 125Vdc max, 2500VA or 300W |
| Quad magnetic relays | 4 Form A (NO), 10A max, 440Vac or 125Vdc max, 2500VA or 300W |
| Dual solid state relays | 2 Form A (NO), AC or DC, 0V - 400V, 120Ma, 35Ohms (max at On-State) |
| Quad solid state relays | 4 Form A (NO), AC or DC, 0V - 400V, 120Ma, 35Ohms (max at On-State) |
| Relay commons | Isolated commons for dual relays or each pair of quad relays |
| Relay isolation | 250V rms working, 2.3 kV rms per 1 minute test |
| Step function response | 30 ms (typ) for contact relays, 25 ms (typ) for solid state relays |
| Relay latching modes | Latching or non-latching |
| Relay active modes | Active on or off, active high or low |
| Hysteresis modes | QA passband mode, split hysteresis, span hysteresis |
| Communication Boards (one optional) | |
| Board selections | RS232, RS485 with dual RJ11 connectors, RS485 with dual RJ45 connectors, USB, Ethernet, USB-to-RS485 gateway, Ethernet-to-RS485 gateway, WiFi with built-in antenna plus USB & RS485, WiFi with external antenna plus USB & RS485 |
| Protocols | Laurel Custom ASCII (serial), Modbus RTU (serial), Modbus TCP (Ethernet or WiFi) |
| Digital addresses | 247 (Modbus), 31 (Laurel ASCII), |
| Isolation | 250V rms working, 2.3 kV rms per 1 min test |
| Environmental | |
| Operating temperature | -40°C to 70°C (-40°F to 158°F) |
| Storage temperature. | -40°C to 85°C (-40°F to 185°F) |
| Relative humidity | 95% at 40°C, non-condensing |
| Protection | NEMA-4X (IP-65) when panel mounted |
| Mechanical | |
| Enclosure | 1/8 DIN, high impact plastic, UL 94V-0, color: black |
| Mounting | 1/8 DIN panel cutout required: 3.622" x 1.772" (92 mm x 45 mm). |
| Dimensions | 4.68" x 2.45" x 5.64" (119 mm x 62 mm x 143 mm) (W x H x D) |
| Maximum panel thickness | 4.5 mm (0.18") |
| Tightening Torque - Connectors | Screw terminal connectors: 5 lb-in (0.56 Nm) |
| Tightening Torque - Pawls | Digital Panel Meter Case Pawls: 5 lb-in (0.56 Nm) |
| Weight of base meter | 210 g (7.4 oz) typical (DPM, counter, timer, 6-digit remote display) |
| Weight of option boards | 30 g (1.0 oz) typical per board (analog output, relay output, communications) |
| General | |
| Programming Methods | Four front panel buttons or via Laurel's free Instrument Setup Software, which runs on a PC under MS Windows. |
| Security | Lockout options include using the front panel buttons, the free Instrument Setup Software, or a hardware jumper. |
| Warranty | 3 years parts & labor |
| Recalibration: All ranges are calibrated at the factory. Recalibration is recommended every 12 months. | |
Free Instrument Setup Software for Series 2 Laureates
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| 1/8 DIN Digital Panel Meters | DIN Rail Transmitters |
Free Downloadable Windows-based Instrument Setup (IS) software (Data Interface Board Required) for use with our programmable Digital Panel Meters, Scale Meters, Counters, Timers, Remote Displays, and Transmitters, are an easy method to set up Laureate 1/8 DIN digital panel meters, counters, timers, remote displays, and DIN-rail transmitters, as explained in the Instrument Setup Software Manual. Laureate 1/8 DIN instruments can also be set up from the front panel, as explained in their respective Owners Manuals. Instrument Setup software is of benefit whether or not the PC is connected to the instrument.
- When the PC is connected to the instrument, Instrument Setup software can retrieve the setup file from the instrument or open a default setup file or previously saved setup file from disk View Setup, then provides graphical user interface (GUI) screens with pull-down menus applicable to input, display, scaling, filtering, alarms, communications, analog output, and front panel lockouts. Fields that are not applicable to the instrument as configured are either left out or grayed out. Clicking on any item will bring up a detailed Help screen for that item. After editing, the setup file can be downloaded, uploaded to the instrument, or saved to a disk. The same setup file can then be downloaded into multiple instruments.
- When the PC is not connected to the instrument, the above GUI screens can be used to set up a virtual instrument. The setup file can then be saved to disk. Switching toView Menu then brings up a screen with the required front panel programming steps. This view can be printed out for use at the instrument site and to serve as a hard copy record.
Download Free Instrument Setup Software
Installation
Set User Account Control (UAC) of MS Windows to "Never notifiy me" so that Instrument Setup Software can create directories. The UAC change screen can be reached as follows:
- Under Windows 7, click on the Windows Start button in the lower left of the desktop and enter "UAC" in the search field.
- Under Windows 8, navigate to Control Panel, then to the "User Accounts and Family Safety" section, and click on "Change User Account Control Settings."
- Under Windows 10, click on the Windows Start button in the lower left of the desktop, then on "Settings", and enter "UAC" in the search field.
- Reboot your computer for the changed UAC setting to take effect.
RJ11-to-DB9 cable with rear view of DB9 connector to PC
RS232 cable, meter to PC, P/N CBL01
Laureate 1/8 DIN Laureate instruments must be equipped with a serial communications board and be connected to the computer via a serial communications cable. The connection can be via RS232, RS485, USB or Ethernet. Following setup, the serial communications board may be removed from the instrument if desired. The wiring of the RS232 cable is illustrated above with end views of the two connectors.
Laureate LT Series transmitters come standard with a 3-wire serial interface, which can be jumpered for RS232 or RS485.
Laureate LTE Series transmitters come standard with an Ethernet interface.
Meter Setup Screens
Click on any of the reduced screens below for a full-size screen view, then click on the Back button of your browser to return to this page. The screens examples below are for a fully-loaded Series 2 Digital Panel Meter (DPM), which is connected to the PC via RS232. If the meter is a Series 1 meter (pre-2007), this is sensed by the software, and somewhat different screens are brought up. Please see Series 1 setup screens.
Welcome Screen
From the computer desktop, click on Start > Programs > IS2 > IS2. Or click on the IS icon on your desktop. This splash screen will be displayed for three seconds. The software revision number is in the lower right.
Communications Selection Screen
Specify your desired communication protocol and the serial communications bus type, which should match the jumper setup of the instrument. Select None if the PC is not connected to the instrument.
Establish Communications Screen
If you selected RS-232, you will be asked to specify the PC Com Port and Baud Rate, which should match the jumper setup of the instrument. Click on Establish. With the right settings, the Communications Established field will light up in green, and the Meter Type will be recognized. If so, click onMain Menu.
Main Menu Screen
Click on File > Default Setup to retrieve the default setup file from disk for your type of meter. Click on File > Open Setupto retrieve a previously saved setup file from disk or on File > Save Setup to save your edited setup file to disk. Click onDPM > Get Setup to retrieve the setup file from your meter or on DPM > Put Setup to download your edited setup file into the meter.
DPM Input + Display Setup Screen
From the Main Menu, click on View > Setup, then on theInput+Display tab. You can now specify the meter hardware, signal type, display mode, and functions of control inputs A and B. Clicking on any item brings up a pull-down menu with the available choices.
DPM Scaling Setup Screen
Click on the Scaling tab, which provides three scaling methods to relate the signal to the displayed reading: 1) Scale and Offset method, 2) Coordinates of two points method, and 3) Reading Coordinates of Two Points method. The last method uses actual high and low signals, and the computer will prompt you.
DPM Filter Setup Screen
Click on the Filter tab, which allows you to specify the digital filter time constant (if any), the adaptive filter threshold, and whether Peak / Valley values are filtered or unfiltered. As for all setup screens, clicking on the F1 key while an item is highlighted brings up a Help screen for that item, as illustrated.
DPM Relay Alarms Setup Screen
Click on the Relay Alarms tab, which allows you to set up Alarms 1 and 2 for the optional dual relay output board. Clicking on any of the four numeric fields changes these to green and brings up a special field to enter the desired numeric value, which is tied to the displayed reading.
DPM Communications Setup Screen
Click on the Communications tab so set up serial communications. In particular, you can special the Serial Protocol and the meter address if multiple meters are to be addressed on the same serial data line.
DPM Analog Output Setup Screen
Click on the Analog Out tab so set up the optional analog output board. Three output ranges are selectable, the endpoints of which can be tied to user-specified High and Low readings.
DPM Lockouts Setup Screen
Click on the Lockouts tab to check off menu items which will no longer be accessible from the front panel of the meter. This will simplify meter operation and prevent unintended setup changes.
Meter Setup Utilities
DPM Front Panel Setup Screen
As an aid to programming the meter from the front panel when a serial connection is not available, you can return to the Main Menu and click on View > Menu. The required sequence of front panel screens will then be displayed. Click on any step in the sequence for the meaning of each digit, as illustrated for the FILtEr step. For a hardcopy, simply press on Print.
DPM Jumper Setup Screen
Specify your desired communication protocol and the serial communications bus type, which should match the jumper setup of the instrument. Select None if the PC is not connected to the instrument.
DPM Jumper Setup Screens
Click on any of the displayed plug-in boards, and you will be presented with the jumper positions and electrical connections for your selected board. This minimizes the need to refer to the printed manual.
DPM Commands Screen
This page allows you set up external input, serial communications, an analog output proportional to the display (optional), and lockouts for Laureate digital counters. The grayed out area at the top right of the screen applies to Laureate remote displays.
Graphical Output Screens (not available with Ethernet)
From the Main Menu, click on Readings if your PC is connected to the meter. A pull-down menu then offers three choices: List, Plot and Graph.
- List presents the latest readings in a 20-row by 10-column table. Press Pause at any time to freeze the display. This is one method to capture peak readings.
- Plot generates a plot of readings vs. time in seconds. It effectively turns the DPM-PC combination into a printing digital oscilloscope.
- Graph generates a histogram where the horizontal axis is the reading and the vertical axis is the number of occurrences of readings. The display continually resizes itself as the number of readings increases.
DPM Calibration Screens
Click on the Scaling tab, which provides three scalClick on the Scaling tab, which provides three scaling methods to relate the signal to the displayed reading: 1) Scale and Offset method, 2) Coordinates of two points method, and 3) Reading Coordinates of Two Points method. The last method uses actual high and low signals, and the computer will prompt you.
Frequency Meter Calibration Screen
Calibration of the quartz crystal of the Laureate frequency meter requires the input of a known frequency from a calibrator. Apply the frequency, then enter the frequency in Hertz. Calibration will be automatic, with storage of the calibration factor stored in non-volatile memory.
Laureate™ 1/8 DIN Case For Laureate Digital Panel Meters, Counters, Timers & Remote Displays
Key Features
- Meets 1/8 DIN Standard.
- Installs from front of panel.
- Short depth behind the panel: only 4" (102 mm) plus connectors.
- Understated 0.157" (4 mm) thick bezel.
- Meets NEMA 4X (IP-65) for high-pressure wawshdon when panel mounted.
- Screw clamps connectors meet VDE / IEC / UL / CSA safety standards.
- Rugged GE Lexan® housing material.
- Safety certified per EN 61010-1.
Dimensions
Maximum panel thickness: 4.5 mm (0.18")
Weight of base meter: 210 g (7.4 oz) typical (DPM, counter, timer, 6-digit remote display)
Weight of option boards: 30 g (1.0 oz) typical per board (analog output, relay output, communications)
Tightening Torque - Connectors: Screw terminal connectors: 5 lb-in (0.56 Nm)
Tightening Torque - Pawls: Digital Panel Meter Case Pawls: 5 lb-in (0.56 Nm)
Dimensioned CAD assembly drawings in EPRT, STEP, x_t. dwg, pdf file formats: Laureate-meter-case.zip (zipping prevents browser from opening CAD files as text files).
Panel Mounting
Slide the meter into a 45 x 92 mm 1/8 DIN panel cutout. Ensure that the provided gasket is in place between the front of the panel and the back of the meter bezel.
The meter is secured by two pawls, each held by a screw, as illustrated. Turning each screw counterclockwise extends the pawl outward from the case and behind the panel. Turning each screw clockwise further tightens it against the panel to secure the meter.
Turning each screw counterclockwise loosens the pawl and retracts it into its well. This position allows installed meter to be removed from their panel, or new meters to be installed in a panel. Do not remove the screws from their pawls. Doing so would cause the screw and pawl to fall off and likely get lost. Do not overtighten so as not to damage the plastic parts.
CAL-Analog
Certificate of Calibration
$65.00
DLS-XLOG2
XLog2 Data logging Software
$495.00
IPC
Splashproof Cover
$55.00
CON01
CON01 Connector
$75.00
CBL01
RS232 Cable for Meters
$35.00
CBL02
USB-to-RS232 Adapter Cable
$47.00
CBL04
RS232 Cable for LT Transmitters
$47.00
CBL05
USB Data Cable for Meters
$47.00
CBL06
USB-to-RS485 Adapter Cable
$47.00
CBL07
USB Programming & Data Cable
$47.00
CBL08
RS485 Splitter Cable
$33.00CBL6
6-foot Power Cable
$41.00CBL12
12-foot Power Cable
$47.00What Are 1/8 DIN Digital Panel Meters Ohmmeters for Resistance in Ohms?
1/8 DIN Digital Panel Meters Ohmmeters are specialized instruments used for measuring electrical resistance, expressed in ohms (Ω). The "1/8 DIN" specification refers to the physical dimensions of the Digital Panel Meters, ensuring that they fit into standard industrial panel cutout sizes. The DIN (Deutsches Institut für Normung) standard is a widely accepted format that defines the size of Digital Panel Meters and other industrial equipment, making it easier to integrate these devices into control panels.
Key Features of 1/8 DIN Digital Panel Meters Ohmmeters
- Compact Size: The 1/8 DIN format corresponds to Digital Panel Meters that measure approximately 96mm by 48mm. This compact size allows for efficient use of space in control panels, making them suitable for applications where space is at a premium.
- Digital Display: The Digital Panel Meters typically feature clear digital displays, providing precise and easy-to-read measurements of resistance. The displays often include high-contrast digits, which can be easily viewed even in challenging lighting conditions.
- Resistance Measurement (Ohmmeter Functionality): The primary function of these devices is to measure electrical resistance. Resistance is a key parameter in many electrical and electronic applications, and accurate measurement is crucial for ensuring proper operation and troubleshooting.
- High Accuracy: These Digital Panel Meters Ohmmeters are designed to provide highly accurate measurements, often with precision down to milliohms or even micro-ohms, depending on the model. This accuracy is essential in applications like quality control, component testing, and research and development.
- Ease of Integration: 1/8 DIN Digital Panel Meters are designed for easy installation and integration into a variety of control systems. They typically feature simple wiring connections and may include features like alarms, analog outputs, or data logging capabilities.
- Versatility: While the primary function is to measure resistance, many 1/8 DIN Digital Panel Meters are multifunctional, allowing for measurements of other parameters such as voltage, current, or temperature. This versatility makes them valuable tools in many industrial settings.
Applications of 1/8 DIN Digital Panel Meters Ohmmeters
- Industrial Control Panels: These Digital Panel Meters Ohmmeters are often found in industrial control panels, where they monitor the resistance of circuits, components, or materials in real-time. This ensures that processes operate within specified parameters, preventing equipment failures and ensuring safety.
- Testing and Calibration: In laboratories or production environments, 1/8 DIN Digital Panel Meters Ohmmeters are used for the precise testing and calibration of components. Accurate resistance measurements are critical in ensuring that parts meet their specifications.
- Electrical Maintenance: Maintenance professionals use these Digital Panel Meters to check the resistance of electrical circuits and components. This can help in identifying issues such as loose connections, corroded terminals, or faulty components before they lead to system failures.
- Quality Control: In manufacturing environments, consistent resistance measurements are crucial for quality control. The Digital Panel Meters Ohmmeters ensure that each component or product meets the required resistance specifications, which is particularly important in industries like electronics and automotive.
Where Are 1/8 DIN Digital Panel Meters Ohmmeters for Resistance in Ohms Used?
1/8 DIN Digital Panel Meters Ohmmeters are specialized instruments designed to measure resistance in ohms, commonly used in a wide range of industrial, laboratory, and commercial applications. Their compact size, precision, and ease of integration into various systems make them essential tools for monitoring and controlling electrical resistance in different environments.
- Industrial Process Control
In industrial settings, monitoring the resistance of various components is crucial for ensuring the proper functioning of machinery and electrical systems. 1/8 DIN Digital Panel Meters Ohmmeters are often integrated into control panels to continuously measure the resistance of heating elements, sensors, and other electrical components. This helps in maintaining optimal operating conditions and preventing potential failures due to resistance variations. - Quality Control and Testing
Manufacturers use 1/8 DIN Digital Panel Meters Ohmmeters in quality control processes to ensure that electrical components meet specified resistance standards. By integrating the Digital Panel Meters Ohmmeters into test rigs or workstations, manufacturers can quickly and accurately measure the resistance of resistors, coils, and other components. This is essential for verifying product quality and compliance with industry standards. - Laboratory Research
In research laboratories, precise measurement of electrical resistance is often required for experiments and studies involving electrical circuits, materials science, and physics. 1/8 DIN Digital Panel Meters Ohmmeters are valuable tools for researchers, providing accurate and reliable resistance measurements that can be easily read and recorded. Their compact size also makes them suitable for use in crowded lab environments. - Power Distribution Systems
In power distribution systems, monitoring the resistance of cables, transformers, and other components is vital for maintaining the integrity of the electrical network. 1/8 DIN Digital Panel Meters Ohmmeters can be installed in substations or control rooms to provide real-time resistance measurements, enabling quick detection of issues such as corrosion, insulation degradation, or faulty connections. - HVAC Systems
Heating, ventilation, and air conditioning (HVAC) systems rely on accurate resistance measurements for proper operation. For instance, the resistance of thermistors or heating elements within an HVAC system can indicate the system's health and performance. 1/8 DIN Digital Panel Meters Ohmmeters are used in these systems to monitor resistance values, ensuring that the system operates efficiently and safely. - Automotive Industry
In the automotive industry, monitoring the resistance of electrical components is essential for vehicle safety and performance. 1/8 DIN Digital Panel Meters Ohmmeters are used on production lines and in diagnostic tools to measure the resistance of sensors, wiring, and other critical components. This ensures that vehicles meet safety standards and perform reliably on the road. - Renewable Energy Systems
Renewable energy systems, such as solar power and wind turbines, require continuous monitoring of electrical resistance to optimize performance and prevent failures. 1/8 DIN Digital Panel Meters Ohmmeters can be integrated into control systems to monitor the resistance of various components, such as solar panels, inverters, and battery storage systems. This ensures that the system operates at peak efficiency and remains reliable over time.
Conclusion
1/8 DIN Digital Panel Meters Ohmmeters for resistance measurement are versatile and reliable tools used across various industries and applications. Their compact size and ability to provide accurate, real-time resistance measurements make them essential components in systems where electrical resistance plays a critical role in performance and safety. Whether in industrial process control, quality assurance, or research laboratories, these Digital Panel Meters Ohmmeters contribute significantly to the effective monitoring and management of electrical systems.
Ohmmeter Digital Panel Meter Frequently Asked Questions
What is the difference between a 2-wire and 4-wire (Kelvin) resistance measurement?
A 2-wire measurement uses the same pair of leads to both source current and sense voltage, so the resistance of the leads themselves gets added to the reading. A 4-wire, or Kelvin, measurement uses a separate pair of sense leads that carry virtually no current, so the voltage drop across the sense leads is negligible and the meter measures only the resistance of the component itself, independent of lead or contact resistance.
When is 4-wire measurement actually necessary versus 2-wire?
4-wire measurement matters most when the resistance being measured is low — generally below about 100 ohms — where lead and contact resistance becomes a significant fraction of the total reading. For higher resistance values, lead resistance is comparatively negligible, and a standard 2-wire measurement is usually accurate enough.
What resistance range can these Digital Panel Meters Ohmmeters measure?
Range depends on the specific model, but 1/8 DIN ohmmeters commonly span from milliohm-level resistances up to several megohms, with the appropriate range selected to match the component or circuit being monitored.
Can these meters be scaled to display something other than raw ohms?
Yes. Many models are user-scalable, so a resistance reading from a sensor like a thermistor can be converted and displayed directly in the relevant engineering unit (such as temperature) rather than requiring the operator to interpret a raw ohm value.
What alarm and output options are available on a resistance meter?
These meters commonly support programmable high/low alarm relays, an isolated analog output, and serial communications such as RS-232 or RS-485, allowing a resistance reading to trigger a local alarm and also feed a PLC or data logging system.
Can one meter measure both resistance and other parameters like voltage or temperature?
Some 1/8 DIN Digital Panel Meters are multifunctional and can be configured for resistance measurement as one of several available input types on the same hardware platform, reducing the need for separate dedicated instruments for each parameter.
How accurate are these ohmmeters at low resistance values?
Accuracy at low resistance depends heavily on whether the measurement uses 2-wire or 4-wire (Kelvin) connections, since lead and contact resistance can dominate a 2-wire reading at low ohm values regardless of the meter's own precision. For milliohm-level accuracy, a 4-wire input configuration is what makes that accuracy achievable in practice.
Is isolation available between the resistance input and the meter's other outputs?
Isolated input and output configurations are commonly available and help protect the resistance measurement from noise introduced by relays, analog outputs, or communication boards operating elsewhere on the same meter or panel.
What test current does the meter use, and does that affect the component being measured?
Ohmmeter functions typically source a small, fixed test current through the component to derive resistance from the resulting voltage drop. On sensitive or low-power components, it's worth confirming the meter's test current against the component's rating, since an excessive test current on a delicate device could affect the measurement or, in rare cases, the component itself.
Can the meter monitor resistance continuously for trending, or is it a one-time reading?
These meters are designed for continuous, real-time resistance monitoring rather than a single spot check, which is what makes them suitable for panel-mounted applications like tracking heating element condition or insulation resistance over time, especially when paired with a data logging or communications output.
Ohmmeter & Resistance Measurement Questions From the Field
Why does my resistance reading change wildly when I'm trying to measure something under 1 ohm?
This is one of the most commonly reported low-resistance measurement problems, and it's almost always traced to the lead and contact resistance of a standard 2-wire connection rather than the resistor itself, since even a fraction of an ohm of lead resistance becomes a large percentage error at sub-1-ohm values. Switching to a 4-wire (Kelvin) connection, where separate sense leads carry no current, eliminates the lead resistance from the reading entirely.
If a 4-wire meter still needs all 4 leads connected to the resistor, why not just calculate resistance from a 2-wire voltage and current measurement instead?
This comes up as a genuine point of confusion in electronics forums, and the answer is that with only 2 leads, the current-carrying leads and the voltage-sensing leads are the same wires, so the voltage drop caused by the leads' own resistance is unavoidably included in the measurement. With 4 separate leads, the sense leads carry essentially zero current (since the meter's sense input has very high impedance), so no voltage is dropped across them and the lead resistance is excluded from the result.
Does contact contamination or corrosion affect resistance readings even with clean-looking test leads?
Yes — even a small amount of contamination on a contact point, such as oils, dust, or light corrosion, can add measurable resistance or make readings appear unstable when leads are flexed, particularly at low resistance values where every milliohm counts. This is a frequently cited cause of inconsistent low-resistance readings that has nothing to do with the meter's calibration.
Why do repeated measurements of the same low-resistance component give slightly different readings each time?
Field guidance for precision low-resistance work generally recommends taking multiple readings and averaging them, since small fluctuations from probe contact pressure, minor thermal effects, and connection variability are common even with a proper 4-wire setup. Letting the setup reach thermal equilibrium before taking a final reading is also commonly recommended, since temperature changes at the contact points can introduce their own small voltage offsets.
Can I use 4-wire measurement for high resistance values, or is it only for low resistance?
4-wire (Kelvin) measurement is specifically valuable for low resistance values, generally below about 1 ohm up to roughly 100 ohms, where lead resistance is a meaningful fraction of the reading. For high resistance measurements — into the kilohm or megohm range — a standard 2-wire connection is generally considered adequate, since lead resistance becomes negligible by comparison.
Can I link the current and sense terminals together on a 4-wire meter if I only have 2 test leads available?
This is a documented workaround for higher resistance values — field guidance notes that if the resistance being measured is above roughly 100 ohms, the current and sense terminals can be linked together (some meters even ship with metal shorting links for this purpose) with only small resulting error, since lead resistance is negligible at that range anyway. For genuinely low resistance measurements, this shortcut defeats the purpose of the 4-wire method and shouldn't be used.
Why does my resistance reading fluctuate specifically when I flex or move the test leads?
This is a commonly reported symptom of a poor or contaminated contact point rather than a fault in the meter — flexing the connection changes the actual contact resistance at that instant, and if that contact resistance is a meaningful fraction of the total reading (as it can be in a 2-wire setup), the displayed value will shift accordingly. Reseating the connection, cleaning the contact point, or switching to a proper 4-wire connection typically resolves it.
Is it normal for a very low resistance reading to require a higher test current than a high resistance reading?
Yes — accurately resolving a very small resistance requires a large enough voltage drop to measure reliably, which for a fixed test current becomes harder as resistance drops toward the milliohm level. Some precision low-resistance testers increase their test current specifically to maintain measurable resolution at very low ohm values, which is a normal part of how those instruments are designed rather than a sign of a problem.
