LAUREL
ELECTRONICS, INC.
Resolution to 0.2 µs for time measurement of periodic events
Features
•
Times single events or accumulated time from 1 µs to 999,999 hrs
•
Timing resolution to 0.2 µs
•
Selectable HH.MM.SS clock format or decimal format
•
Inputs from NPN or PNP proximity switches, contact closures, digital logic,
magnetic pickups down to 12 mV, or AC inputs up to 250 Vac
•
Triggers on positive or negative pulse edges
•
External controls for reset, meter hold and decimal points
•
Universal AC power, 85-264 Vac
•
Isolated 5, 10 or 24 Vdc excitation supply to power sensors
•
NEMA 4X, 1/8 DIN case
•
Optional serial I/O: Ethernet, USB, RS232, RS485, Ethernet-to-RS485 converter
•
Optional relay outputs: dual or quad relays, contact or solid state
•
Optional isolated analog output: 4-20 mA, 0-20 mA, 0-10V, -10 to +10V
•
Optional low voltage power: 10-48 Vdc or 12-32 Vac
•
Optional Extended Timer: features of standard timer plus rate based on 1/time
Description
The Laureate stopwatch meter is designed to time single
events, such as sporting events or processes, which produce
start and stop pulses. It can also time the width of a single pulse.
Highest resolution is 0.2 µs, since timing is achieved by counting
5.5 MHz clock pulses. For long intervals, the display is updated
continuously during timing. Laureate™ stopwatch timers use the
FR dual-channel signal conditioner and Standard counter main
board.
•
A-A Stopwatch Mode. Time can be 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 can also be 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.
•
Rate Based on 1/Time Mode. Highly accurate rate can be
displayed by taking the inverse of time. Extensive arithmetic
capabilities allow display in engineering units, such as
meter/sec. This mode requires use of an Extended counter.
Display. The event time (Item #1) may be displayed H, M or S
format with six-digit resolution. The longest single-event timing
interval is 999,999 hours. The highest resolution is 0.2 µs. The
event time may also be displayed in HH.MM.SS clock format with
Laureate™ Time Interval Meter
1 s resolution. The stopwatch display is updated during timing
at a rate controlled by a gate time, up to 25/s. It is reset to zero
when the next start pulse occurs. Accumulated time from multiple
events (Item #2) is also tracked and may be displayed up to
999,999 hours.
Inputs to the FR dual-channel signal conditioner can be
proximity switches with PNP or NPN output, TTL or CMOS logic,
magnetic pickups, contact closures, low-level outputs from
turbine flow meters down to 12 mV, and high-level AC line inputs
up to 250 Vac. A built-in isolated 5, 10, or 24 Vdc excitation
supply can power proximity switches and other sensors, thus
eliminating the need for an external power supply.
Digital filtering is selectable for electrically noisy environments,
including a batch averaging filter and an adaptive moving average filter which provides a choice of 8 time constants from 80 ms
to 9.6 s. When a significant change in signal level occurs, that
filter adapts by briefly switching to the shortest time constant to
follow the change, then reverts back to the selected time constant. In a selectable Auto filter mode, the filter time constant is
automatically selected based on detected signal noise.
Designed for system use. Optional plug-in boards include
Ethernet and other serial communication boards, dual or quad
relay boards, and an isolated 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 red or green LEDs.
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 builtin isolated 5, 10, or 24 Vdc excitation supply can power transducers and eliminate the need for an external power supply.
All power and signal connections are via UL / VDE / CSA rated
screw clamp plugs.
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 1
Specifications
Display
Readout
Range
Indicators
Inputs
Types
Grounding
Minimum Signal
Maximum Signal
Noise Filter
Contact Debounce
Stopwatch Mode
Timing Modes:
With Ch A only
With Ch A tied to Ch B
With Ch A and Ch B
Timing Interval
Timing Resolution
Selectable Decimal Time
Selectable Clock Time
Output & Display Update
Accuracy
Time Base
Span Tempco
Long-term Drift
6 LED digits, 7-segment, 14.2 mm (.56"), red or green
-999999 to +999999
Four LED lamps
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)
+ to + edge, or - to - edge.
+ to - edge, or - to + edge.
+ edge of A to + edge of B, + edge of A to - edge of B,
- edge to A to - edge of B, - edge of A to - edge of B
1 µs to 999,999 hrs
0.2 µs to 1 hr
999999 H, M or S format with decimal point
HH.MM.SS format
30 ms + gate time programmable from 10 ms to 199.99 s
Crystal calibrated to ±2 ppm
±1 ppm/°C (typ)
±5 ppm/year
Power
Voltage, standard
Voltage, optional
Frequency
Power Isolation
Excitation Output (standard)
5 Vdc
10 Vdc
24 Vdc
Output Isolation
Analog Output (optional)
Output Levels
Current compliance
Voltage compliance
Scaling
Resolution
Isolation
Relay Outputs (optional)
Relay Types
Current Ratings
Output common
Isolation
85-264 Vac or 90-300 Vdc (DC operation not UL approved)
12-32 Vac or 10-48 Vdc
DC or 47-63 Hz
250V rms working, 2.3 kV rms per 1 min test
5 Vdc ± 5%, 100 mA
10 Vdc ± 5%, 120 mA
24 Vdc ± 5%, 50 mA
50 Vdc to meter ground
4-20 mA, 0-20 mA, 0-10V, -10 to +10V (single-output option)
4-20 mA, 0-20 mA, 0-10V (dual-output option)
2 mA at 10V ( > 5 kΩ load)
12V at 20 mA ( < 600Ω load)
Zero and full scale adjustable from -99999 to +99999
16 bits (0.0015% of full scale)
250V rms working, 2.3 kV rms per 1 min test
(dual analog outputs share the same ground)
2 Form C contact relays or 4 Form A contact relays (NO)
2 or 4 Form A, AC/DC solid state relays (NO)
8A at 250 Vac or 24 Vdc for contact relays
120 mA at 140 Vac or 180 Vdc for solid state relays
Isolated commons for dual relays or each pair of quad relays
250V rms working, 2.3 kV rms per 1 min test
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 2
Serial Data I/O (optional)
Mechanical
Board Selections
Protocols
Data Rates
Digital Addresses
Isolation
Environmental
Operating Temperature
Storage Temperature
Relative Humidity
Protection
Electrical Connections
Ethernet, Ethernet-to-RS485 server, USB, USB-to-RS485 server, RS485
(dual RJ11), RS485 Modbus (dual RJ45), RS232
Modbus RTU, Modbus ASCII, Laurel ASCII protocol
300 to 19200 baud
247 (Modbus), 31 (Laurel ASCII),
250V rms working, 2.3 kV rms per 1 min test
0°C to 6°C
-40°C to 85°C
95% at 40°C, non-condensing
NEMA-4X (IP-65) when panel mounted
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 3
Application Examples
Time Interval Mode for Time Delay
Time Interval Mode for Time Delay
Timing Process Dynamics
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).
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.
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.
Rate Based on 1 / Time
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 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
Some of the many possibilities in instrumenting a pulsed laser system with Laureate dual-channel
counters: elapsed time, number of pulses, pulse width, pulse separation, duty cycle, and pulse rep rate.
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 4
Ordering Guide
Create a model a model number in this format: L50000FR, IPC
Main Board
Power 0 Isolated 85-264 Vac
Relay Output
(isolated)
Analog Output
(isolated)
Digital Interface
(isolated)
L5 Standard Main Board, Green LEDs
L6 Standard Main Board, Red LEDs
L7 Extended Main Board, Green LEDs
L8 Extended Main Board, Red LEDs
Note: Use of the Extended Main Board makes this counter also suitable for A-B time
interval, frequency, rate, period, square root of rate, up or down total, arithmetic
functions, simultaneous rate and total, phase, duty cycle, batching, and custom curve
linearization.
1 Isolated 12-32 Vac or 10-48 Vdc
0 None
1 Two 8A Contact Relays
2 Two 120 mA Solid State Relays
3 Four 8A Contact Relays
4 Four 120 mA Solid State Relays
0 None
1 Single isolated 4-20 mA, 0-20 mA, 0-10V, -10 to +10V
2 Dual isolated 4-20 mA, 0-20 mA, 0-10V
0 None
1 RS232
2 RS485 (dual RJ11 connectors)
4 RS485 Modbus (dual RJ45 connectors)
5 USB
6 USB-to-RS485 converter
7 Ethernet
8 Ethernet-to-RS485 converter
Input Type FR Dual-Channel Pulse Input Signal Conditioner
Add-on Options BL Blank lens without button pads
CBL01 RJ11-to-DB9 cable
CBL02 USB-to-DB9 adapter
CBL05 USB Cable, A to B
IPC Clear front panel cover sealed to NEMA 4X / IP65
BOX1 NEMA-4X wall-mount enclosure
BOX2 BOX1 plus IPC
LAUREL
ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 5
Loading...