FREQUENCY

Frequency Calibrator with Totalizer Model 942
Handheld Calibrator with the Accuracy of an 8-Digit Counter!

• 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 12V p-p.
• Reads All Waveforms—
  From 40 mV to 240V 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.

Model 40A Frequency Source

• Generate Square Waves—
  0.5 Hz to 60 kHz in 40 steps. Amplitude from mV to 15V p-p.
• Zero Based and Zero Crossing Output— 
  Matches inputs of frequency input devices.
• Extremely Accurate—
   ±8 PPM (0.0008% of setting).
• Long Battery Life—
  Two 9V alkaline batt. last 200 hours!
• Frequencies— 
  5, 6, 10, 12, 15, 20, 30 & 60 times multiplier.
• Multiplier—
  0.1, 1, 10, 100 & 1000 times frequency scale.

Model C-41 Dry Contact Module

• Simulate Dry Contacts— 
  Solid state relay enables frequency calibrator to simulate opening & closing of contacts to over 5 kHz.
• Read Dry Contacts—
  Supplies excitation current to allow a frequency calibrator to measure an unpowered contact up to 2 kHz.
• Filters Out Contact Bounce— Adjustable circuit filters bounce from mechanical contacts for accurate readings.