Laurel Electronics for Digital Panel Meters, Counters, Timers, Transmitters, Digital Displays

Digital Panel Meters - Counters - Timers
DIN Rail Transmitters - Large Digit Displays

    

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Stopwatch for Single Events
or Accumulated Events
4-20 mA Current Transmitter
  Resolution to 0.2 µs.  Duration to 999,999 hrs.
DIN Rail mounted, digitally programmable.

Features

  • Isolated 4-20 mA or 0-10V transmitter outputs, selectable.
  • Times single event time or accumulated time of all events.
  • Timing resolution to 0.2 µs.
  • Timing duration to 999,999 hrs.
  • Inputs from NPN or PNP proximity switches, contact closures, digital logic, or magnetic pickups down to 12 mV.
  • Triggers on positive or negative pulse edges.
  • Output resolution: 0.025% of span (12 bits).
  • Output accuracy: ±0.05% of span.
  • 5V, 10V or 15V dc excitation output to power sensors.
  • DIN rail mount package only 22.5 mm thick.
  • Detachable screw clamp plug connectors.
  • Easy setup using PC-based Instrument Setup Software.
  • Optional dual solid state relays for alarm or control.

4-20 mA Current Transmitter, Stopwach for Single Events or Accumulated Events
CE Mark       RoHS Mark

Description

Stopwatch mode of Laureate digital stopwatch transmitter

The Laureate 4-20 mA stopwatch transmitter puts out an analog signal whose whose value tracks the time of single events which produce start and stop pulses, or accumulated time of multiple events  It can also time the width of a single pulse. The highest resolution is 0.2 µs, making the transmitter ideal for fast events. The longest timing interval is 999,999 hrs. For long events, the analog output is updated continuously during timing. There are two primary timing modes:

  • A-A Stopwatch Mode. Time is measured between a start pulse and a stop pulse, both on Channel A, from either the positive or negative edges.
      
  • A-B Stopwatch Mode. Time is measured between a start pulse on Channel A (positive or negative edge) and a stop pulse on Channel B (positive or negative edge). This mode allows inputs from different sources. In addition, the A and B inputs can be tied together to start the stopwatch with one polarity and stop it with the other polarity.

Event time (Item #1) is measured by counting 5.5 MHz clock pulses from a calibrated quartz crystal. The stopwatch output is updated during timing at a rate controlled by a gate time, up to 25/sec. Time is reset to zero when the next start pulse occurs. Accumulated time from multiple events up to 999,999 hours (Item #2) can also be tracked.

Signal Conditioner Board for Laureate Time Trasnmitter Universal Signal Conditioner

The dual-channel signal conditioner used for pulse detection accepts inputs from proximity switches with PNP or NPN output, TTL or CMOS logic, magnetic pickups, contact closures, and other signals from 12 mV to 250 Vac. Jumper selections provide optimum operation for different sensor types and noise conditions. A built-in 5V, 10V or 15V dc excitation supply can power proximity switches and other sensors, and eliminate the need for an external power supply.

Transmitter Output

The analog transmitters output can be selected as 4-20 mA or 0-10V, and is isolated to avoid ground loops. The output is generated by an ultra-linear 12-bit (4096 step) digital-to-analog convert (DAC), whose span can be adjusted from 0 to ±999,999 internal counts and zero can be adjusted from -999,999 to +999,999 internal counts. The analog output has a rated accuracy of ±0.05% of output span.

East to Set Up and Install

Transmitter programming is via a three-terminal RS-232 port using Laurel's PC-based Instrument Setup Software. This software can be downloaded from this website at no charge. The required transmitter-to-PC interface cable is available from Laurel (P/N CBL03).

The transmitters are housed in a DIN rail case that is only 22.5 mm (0.89") thick. Signal connections are via detachable screw clamp plug connectors.

Specifications
 Laureate 4-20 mA Transmitters
Stopwatch for Single Events or Accumulated Events

Pulse Input

Types

Signal Ground
Minimum Signal
Maximum Signal
Maximum Frequency
Contact Debounce
Time Base Accuracy
Span Tempco
Long-term Drift

AC, pulses from NPN, PNP transistors, contact closures, magnetic pickups.
Common ground for channels A & B.
Nine ranges from (-12 to +12 mV) to (+1.25 to +2.1V).
250 Vac
1 MHz, 30 kHz,  250 Hz (selectable).
0, 3, 50 ms (selectable).
Quartz crystal calibrated to ±2 ppm.
±1 ppm/°C (typ)
±5 ppm/year
Analog Output
Output Levels
Compliance, 4-20 mA
Compliance, 0-10V
Output Resolution
Output Accuracy
Output Update Rate
Output Isolation		 4-20 mA and  0-10 Vdc (selectable)
10V ( 0-600 ohm load )
2 mA ( 5 kOhm load )
12 bits (4,096 steps)
±0.05% of output span
Programmed gate time + 30 ms + 0-2 signal periods
250V rms working, 2.3 kV rms per 1 minute test
Transducer Excitation Output (standard)
Jumper Selection 1
Jumper Selection 2
Jumper Selection 3		 10V @ 60 mA, isolated to 50V from signal ground
5V @ 50 mA, isolated to 50V from signal ground
15V @ 60 mA, non-isolated
Dual Relay Output (optional)
Relay Type
Load rating		 Two solid state relays, SPST, normally open, Form A
120 mA at 130 Vac or 170 Vdc, 28 ohms series resistance.
Power Input
Standard power
Low power option
Frequency
Power Isolation		 95-240V AC ±10% or 90-300V DC
12-30V AC or 10-48V DC
DC or 47-63 Hz
250V rms working, 2.3 kV rms per 1 min test.
Mechanical
Case Dimensions
Case Mounting
Electrical Connections		 120 x 101 x 22.5 mm
35 mm rail per DIN EN 50022
Detachable screw clamp plug connectors
Environmental
Operating Temperature
Storage Temperature
Relative Humidity		 0°C to 70°C
-40°C to 85°C
95% at 40°C, non-condensing

Typical Applications

Stopwatch Mode
Stopwatch mode of Laureate digital stopwatch transmitter The stopwatch mode is used to time single events between start and stop pulses on the same channel. Duration of a single wave shape can be measured by tying the A and B channels together.

Timing Process Dynamics
Timing process dynamics by Laureate digital stopwatch transmitter The start and stop pulses used for timing can be generated by the dual relays in a Laureate panel meter, counter, or transmitter. For instance, the start and stop pulse edges can be created as temperature passes two alarm setpoints, or as temperature cycles in a hysteresis control mode.

Replacing an Oscilloscope with a Laureate Meter or Transmitter

Replacing an oscilloscope by a Laureate digital stopwatch transmitter

 An oscilloscope is great for viewing and timing pulses in a lab. However, in fixed installations where digital timing accuracy and control outputs are required, a low-cost Laureate time interval meter or transmitter will be the instrument of choice. Resolution to 0.2 µs is feasible.

Instrumenting a Pulsed Laser System

Instrumenting a laser system using Laureate timers and stopwatches

Some of the many possibilities in instrumenting a pulsed laser system with Laureate dual-channel counters and transmitters: elapsed time, number of pulses, pulse width, pulse separation, duty cycle, and pulse rep rate.

Pinout
 Laureate 4-20 mA Transmitter
Stopwatch for Single Events or Accumulated Events
(shown with optional dual relay output)

                                   Transmitter Powering a Single Sensor
  

Pinout, 4-20 mA Current Transmitter, Stopwach for Single Events or Accumulated Events

 Pinout, 4-20 mA Current Transmitter, Stopwach for Single Events or Accumulated Events
Transmitter Powering Two Sensors Transmitter with Active or Passive Sensors

Ordering Guide
 Laureate 4-20 mA Transmitter
Stopwatch for Single Events or Accumulated Events

Create a model number in this format: TA202FR. This is for a 4-20 mA transmitter, Standard main board, 95-240 Vac power, isolated dual solid state relays, and dual channel pulse input signal conditioner. Includes detachable screw clamp connectors.
 
Transmitter
Type		 TA    Laureate 4-20 mA Transmitter. $235
Main Board 6  Standard Main Board. NC
Power 0  Isolated 95-240 Vac & 90-300 Vdc
1  Isolated 12-30 Vac & 10-48 Vdc.		 NC
$30
Setpoint
Output		 0  None.
2  Isolated Dual Solid State Relays.		 NC
$30
Input Type FR  Dual Channel Pulse Input Signal Conditioner. NC
Accessories CBL03  RS-232 cable, TA to computer.
CBL02  USB to RS-232 cable adapter.		 $19
$39
 
Laurel Electronics domestic orders Order from distributors for shipment to USA or Canada.
Laurel Electronics international orders Order online for international shipment.

 

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Laurel Electronics, Inc.
Industrial Instrumentation & Displays
3183-G Airway Avenue
Costa Mesa, CA 92626, USA
Phone: (714) 434-6131
Fax:     (714) 434-3766

  
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