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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Laureate™ Time Interval Meters
Resolution to 0.2 µs for time measurement of periodic events
  

Laurel Timer Interval Meter and Digital Timer
CE Mark   UL Mark RoHS Mark

Features

  • For periodic events with width from 1 µs to 199.999 s.
  • Display resolution to 0.2 µs.
  • Rep rated to 250 kHz.
  • Inputs from NPN or PNP proximity switches, contact closures, digital logic, magnetic pickups down to 12 mV, or AC inputs up to 250 Vac.
  • Trigger on positive or negative pulse edges.
  • 6-digit red or green LED display.
  • Isolated 5, 10 or 24 Vdc excitation output to power sensors.
  • Green or red display
  • NEMA 4X, 1/8 DIN case
  • Dual relay option
  • Analog output option
  • Serial communication options
  • Low voltage AC & DC power
  • Certified to UL 61010C-1 (UL mark), EN 61010-1 (CE mark), and RoHS.

Description

Time Interval Mode for Time DelayA-to-B Time Interval Mode

The Laureate™ time interval meter can display pulse width or time delay between individual pulses to a resolution of 0.2 µs. It can also display average pulse width or average time delay between multiple pulses.

Time interval is measured between inputs on channels A and B. Timing starts when a pulse is applied to Channel A (selectable positive or negative edge), and ends when a pulse is applied to Channel B (selectable positive or negative edge). In case of a single pulsed signal, the A and B inputs can be tied together. A positive or negative slope may be selected to start timing, and the opposite slope must be selected to stop timing. Timing is achieved by counting 5.5 MHz clock pulses. Multiple integral time intervals are averaged over a gate time which is selectable from 10 ms to 199.99 s and also controls the display update time.

The Laureate time interval meter uses the FR dual-channel signal conditioner board and the standard (non-extended) counter main board.

Display

Time interval can be displayed in seconds, milliseconds, or microseconds with 6-digit resolution. In the typical application, time is displayed in milliseconds with 1 µs resolution. For times less than 100 ms, display resolution down to 0.2 µs can be achieved by applying a multiplier of 10, moving the decimal point by one position, and averaging many time intervals.

Signal Conditioner Board for Laureate Digital Timer Interval Meter and Digital TimerUniversal 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 isolated 5, 10, or 24 Vdc excitation supply can power proximity switches and other sensors, and eliminate the need for an external power supply.

Other Features and Options

Plug-in isolated analog output, dual setpoint controller, and RS232/485 serial data I/O boards can upgrade the Laureate from a stand-alone monitor to system interface and control. The 1/8 DIN case of Laureate meters and counters meets NEMA 4X (IP-65) standards from the front for high pressure wash-down when panel mounted.

Specifications

Display
Readout
Range
Indicators
6 LED digits, 7-segment, 14.2 mm (.56"), red or green.
-999999 to +999999
Four LED lamps
Inputs
Types
  
Grounding
Channel A Frequency
Channel B Frequency
Minimum Signal
Maximum Signal
Noise Filter
Contact Debounce
AC, pulses from NPN, PNP transistors, contact closures, magnetic pickups
Common ground for channels A & B
0.005 Hz to 1 MHz
0.005 Hz to 250 kHz
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)
Time Interval Mode
Timing Start
Timing Stop
Periodic Timing Interval
Gate Time
Time Before Zero Output

Channel A pulse, + or - edges
Channel B pulse, + or - edges
Gate time + 30 ms + 0-2 time intervals
Selectable 10 ms to 199.99 s
Selectable 10 ms to 199.99 s

Resolution

0 - 199.999 s
0 - 99.9999 s
0 - 9.99999 s
0 - .999999 s
0 - .099999 s

1 ms
100 µs
10 µs
1 µs
0.2 µs

Accuracy
Time Base
Span Tempco
Long-term Drift

Crystal calibrated to ±2 ppm
±1 ppm/°C (typ)
±5 ppm/year

Power
Voltage, standard
Voltage, optional
Frequency
Power Isolation
95-240 Vac ±10% or 90-300 Vdc
12-30 Vac or 10-48 Vdc
DC or 47-63 Hz
250V rms working, 2.3 kV rms per 1 min test.
Excitation Output
5 Vdc
10 Vdc
24 Vdc
Output Isolation
5 Vdc ±5%, 100 mA
10 Vdc ±5%, 120 mA
24 Vdc ±5%, 50 mA
50 Vdc to meter ground
Analog Output (optional)
Output levels
Compliance
Scaling
Resolution
Isolation
0-10V, 0-20 mA, 4-20 mA (jumper selectable)
2 mA at 10V (5 kOhm load), 12V at 20 mA (0-60 ohm load)
Zero and full scale adjustable from -99999 to +99999
12 bits (0.025% of full scale)
250V rms working, 2.3 kV rms per 1 min test
Dual Contact Relay Outputs (optional)
Relay Type
Load Rating
Isolation
Form C
8A at 250 Vac or 24 Vdc
250V rms working, 2.3 kV rms per 1 min test
Dual Solid State Relay Outputs (optional)
Relay Type
Load Rating
Isolation
SPST, normally open, Form A
120 mA at 130 Vac or 170 Vdc, 28 ohms series resistance.
250V rms working, 2.3 kV rms per 1 min test
Serial Data I/O (optional)
Board Selections
Protocols
Data Rates
Digital Addresses
Isolation
RS232, RS485, Modbus RS485
Modbus RTU, Modbus ASCII, simpler Laurel ASCII
300 to 19200 bps
247 (Modbus), 31 (Laurel ASCII),
250V rms working, 2.3 kV rms per 1 min test
Environmental
Operating Temperature
Storage Temperature
Relative Humidity
Protection
0°C to 60°C
-40°C to 85°C
95% at 40°C, non-condensing
NEMA-4X (IP-65) when panel mounted
Signal Connections
Pinout for Laureate Digital Timer Interval Meter and Digital Timer

Typical Applications

Time Interval Mode for Time Delay

Time Interval Mode for Time Delay

For periodic pulses applied to A and B channels, time delays can be measured down to 0.2 µs resolution from the rising or falling edge of A to the rising or falling edge of B (selectable).

Time Interval Mode for Pulse Width

Time Interval Mode for Pulse Width

The width of periodic pulses (t1 or t2) can be measured by tying the A and B channels together. As for time delay, readings are averaged over a user-selectable gate time.

Timing Process Dynamics with a Panel Meter and Time Interval Meter

Timing Process Dynamics with a Panel Meter and Time Interval Meter

The start and stop pulses used for timing can be generated by the dual relay board in a Laureate panel meter or digital counter. For instance, the start and stop pulse edges can be created as temperature passes two alarm setpoints, or temperature cycles in a hysteresis control mode.

Replacing an Oscilloscope with a Laureate Time Interval Meter

Replacing an Oscilloscope with a Laureate Time Interval Meter

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 will be the instrument of choice. Resolution to 0.2 µs is feasible.

Instrumenting a Pulsed Laser System Using Laureate Counters

Instrumenting a Pulsed Laser System Using Laureate Counters

Some of the many possibilities in instrumenting a pulsed laser system with Laureate dual-channel counters.

Ordering Guide
Laureate™ Time Interval Meters

Create a model number in this format: L60101FR. This example calls out a Laureate counter with a Standard Main Board with red LEDs, 95-240 Vac ±10% power, dual 8A contact relays, no second output, RS-232 serial output, and a dual-channel frequency signal conditioner. Includes plug-in screw terminals.
  
Main
Board
L5  Standard Main Board, Green LEDs.
L6  Standard Main Board, Red LEDs.
$230
$230
Note: In addition to A-to-B time interval, the Standard Main Board handles frequency, rate, period, square root of rate, and up or down total.  
Power Isolated 95-240 Vac ±10% & 90-300 Vdc
Isolated 12-30 Vac & 10-48 Vdc.
NC
$30
Setpoint
Output
None.
Dual 8A Contact Relays.
Isolated Dual Solid State Relays.
NC
$80
$55
Second
Output
None.
Isolated 0-20 mA & 0-10 V.
NC
$90
Digital
Interface
None.
Isolated RS-232.
Isolated RS-485.
Isolated Modbus RS-485.
NC
$60
$80
$90
Input Type FR  Dual-Channel Pulse Input Signal Conditioner.  NC
Add-on
Options
EB
BL

CBL01
CBL02

IPC
BOX1
BOX2
Extra bight red LED display
Blank lens without button pads
RJ11-to-DB9 cable
USB-to-DB9 adapter
Clear front panel cover sealed to NEMA 4X / IP65
NEMA-4X wall-mount enclosure with 1/8 DIN cutout
NEMA-4X wall-mount enclosure with 1/8 DIN cutout plus IPC
$30
NC
$19
$39
$40
$140
$180 
 
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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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