Calibrator for Voltage, Current and Frequency: Transmitter, Flow and PLC Testing, Model CLF-II
Discontinued Product

CLF-II

Generates Pulses and Reads Frequency
Converts Any Input into Any Output Signal
Powers, Reads and Simulates Digital Sensors
Sources and Reads Millivolts, Volts and Milliamps
Powers, Reads and Simulates 2-Wire Transmitters
Simultaneous Input and Output Readings
Outputs Pre-Set Number of Pulses
Scale Factors for Flow Readings
Stop-Watch Pulse Counting

Description

The CLF-II is not longer available. Please see the CLD-IIas a possible subtitute.

Transmitter Simulation and Calibration
To simulate process conditions, model CLF-II can be connected to loop powered transmitter inputs, allowing easy performance tests on system software. For transmitter calibration, model CLF-II offers an integral 24 Vdc power supply and loop current read-out. Transmitter readings may be scaled into engineering units like psi, pascal, bar, etc. Readings in percent (%) on 4-20mA ranges can be obtained directly by pressing the “% /mA” key; this is useful when testing or adjusting alarm settings.
Simultaneous Readings
Signal outputs and measurement inputs are fully electrically isolated from each other to read output and input simultaneously. This feature helps to observe related signals like signal converters, flow computers and controllers. Almost any input-output mix can be selected.
Functions for PLC Testing
Square wave pulses can be generated with frequencies from 0.01 Hz to 10 kHz. Pulse height is adjustable between 100 mV and 24 Volts. Output can drive 34 mA to simulate signals from photo electrics, electro magnetic sensors and proximity switches. With this powerful function, the user can even test electro mechanical devices such as counters and relays. Pulse generation can be either “free running” or a “counted number.” A counter input with adjustable thresholds offers you a test facility for your digital sensors.
Extended Use on Alkaline Batteries
Thanks to low power CMOS components and the use of alkaline cells, the CLF-II operates for more than 20 hours in the measurement mode on one set of alkaline batteries. Battery condition is monitored, indicating replacement priorities at two levels. For bench use, tester may be line powered by using a battery eliminator adaptor.
Factory Floor Design
The model CLF-II has been designed for use in industrial environments such as factory floors, process plants, service departments and maintenance workshops. The unit is rugged and has a rain tight front. Connectors are suitable for use with 4 mm test plugs. A strong and handy carrying case protects the tester when stored in a toolbox and accommodates the test leads and instructions. Special carrying straps allow you to use the tester hands-free.
Instrumentation Calibration
Millivolts, Volts, milliamps, and frequency can be measured and generated at the same time. Both accuracy performance and stability allow you to calibrate field and control room instrumentation. Menu structured operation and LCD “man-machine” dialogues make the operating manual almost obsolete. Functions are available to ramp signals automatically and to store 2 to 6 pre-set output values. Pre-set values can be recalled manually or automatically with interval times between 10 and 100 second, a handy feature when stroking control valves.
Flow Computer Testing
Special functions are available to simulate signals from turbine meters, vortex flow transmitters and differential pressure flow transmitters. Scaling can be performed on both measurement and output signals on frequency and milliamp ranges. On both ranges, the user can set the scale ends between -9999 and +9999. In addition to the milliamp ranges, a square root function may be selected. Scaled readings may represent engineering units such as liters/min, gallons/hour, etc. The “counted number of pulses” feature offers a unique test facility for batch counters, frequency and flow indicators.

For complete product specifications see the Related Links section at the bottom of this page.

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Note: Model CLF-II includes: carrying case, batteries, instruction manual, calibration certificate, spare fuse & set of test leads.

Calibrator for Voltage, Current and Frequency: Transmitter, Flow and PLC Testing, Model CLF-IIDiscontinued Product

CLF-II

Calibrator for Voltage, Current and Frequency: Transmitter, Flow and PLC Testing, Model CLF-II
Discontinued Product