Altek 942 Frequency Calibrator

Discontinued See: PieCal 541Calibrate your turbine meters, frequency counters, vibration systems, tachometers, vortex shedders, integrators and any other frequency devices in the shop, plant or field. Measure from 0.01 Hz to 250.00 KHz with resolution down to 0.01Hz. For your slower signals, source or measure from 0.1 to 2000.0 Counts per Minute (CPM) or from 10 to 20000 Counts per Hour(CPH). Quickly indicate process signals...no more waiting around with stopwatch and calculator.

“READ MODE" MEASURES WIDE RANGEOF FREQUENCIES  AND WAVEFORMS
Use in the field to check the signals from your  flowmeter pickups, velocity and motion detectors, Frequencies can bedirectly measured from 0.01 Hz to 250.00 KHz in four frequency ranges.

Measure extremely slow frequencies (<1 Hz) with high resolution using CPM & CPH. Instead of displaying 1/2 Hz as 0.5 Hz (1 digit of resolution) as most with frequency countersyou can display it as 30.0 CPM (3 digits of resolution) or as 1800CPH (4 digits of resolution). You can now measure these slowsignals in seconds with the Model 942 instead of many minutes needed with a totalizer, stopwatch and calculator. Measure signals from 30 mV to 240 V peak-to-peak with a minimum pulse width of 2 microseconds.

Months of normal use on one set of  batteries. Six “AA” alkaline cells provide more than 40 hours of continuous output or  more than 80 hours of continuous frequency measurement. An optional AC adaptor can be used when the battery is low or for continuous bench and field use.

“SOURCE MODE”  FUNCTION GENERATOR
Select sine wave outputs to simulate vibration pickups, variable speed drives and square waves to simulate flowmeters and magnetic pickups. Any frequency from 0.01 Hz to 250.00 KHz can be sourced in four frequency ranges to calibrate tachometers, counters, data loggers, turbine meters and frequency transmitters. For low frequency applications such as positive displacement flowmeters, Watt-hour meters, slow rate integrators and assembly linecounting, the Model 942 sources signals as low as 1 CPH(0.0002777 Hz). Amplitude is adjustable from 50 millivolts to 12 Volts peak-to-peak.

Three “QUIK-CHEK” output values are remembered for each range. Turn the knob to check trip points, controller action and to control variable speed drives. The fast response 942 sets quickly without overshoot but allows slow changes at your own rate. Memory is retained for each range even when power is off.

CALIBRATE TOTALIZERS
Calibrate your totalizers & integrators faster and more accurately with the Model 942. Verify totalizer readings by outputting a number of pulses over 1 to 99 minutes. The Model 942 will automatically stop when the selected number of pulses have been sent to the totalizer. This eliminates waitingseveral minutes with a stopwatch to try to catch the total. You can also use the 942 as a timed totalizer to check the output rate from your flowmeters or integrators.

Features:

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• Laboratory Accurate ±0.001% of setting (10 PPM).
• Six Real World Ranges 1 to 20000 Counts-Per-Hour (CPH), 0.1 to 2000.0 Counts-Per-Minute (CPM), 0.01 to 999.99 Hz, 0.001 to 99.999 kHz and 0.01 to 250.00 kHz.
• Calibrate Totalizers Output a selectable number of pulses over 1 to 99 minutes to verify totalizer readings. The calibrator automatically stops outputting when the selected number of pulses has been sent to the totalizer.
• Count Pulses Use as a timed totalizer to check flowmeter and integrator outputs. Built-in totalizer to 99999 counts with optional timed operation to 99 minutes up to maximum rate of 100 Hz.
• Save Time Calibrate flowmeters, frequency transmitters and integrators. Use CPH and CPM ranges to directly display extremely slow signals, eliminating waiting with stop watch and calculator.
• Match Your Receiver's Input
• Select from sine, zero crossing square or zero based square wave output. Adjustable amplitude from 50 mV to 12 V p-p.
• Reads All Waveforms From 40 mV to 240 V peak. Instantly recall the minimum and maximum frequency measured.
• Quik-Chek Switch Instantly recall 18 output frequencies (three for each range). Fast, easy adjustment with a multi-speed digital potentiometer.
  
• Built-In Leads Large alligator clips for easy connections. Optional BNC connector available.
• Long Battery Life Six AA alkaline batteries last over 40 hours.

What's In The Box:

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• (1) 9V Alkaline battery
  
• (1) Instruction Manual
  
• (1) Carrying Case
  

Brochure/Datasheet

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Instruction manual

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