Piecal 541-RW
Frequency Calibrator with Totalizer with 3 Year Replacement Warranty

  • Accuracy: ± 0.005% of range
  • 5 ranges from 1CPH to 20.000KHz for source and read
  • Totalize inputs/outputs from 1 to 99999 in 1.0 to 100.0 minutes
  • Read a wide range of frequencies and waveforms from 50mV to 120V peak
  • Source sine and square waves, zero based, or zero crossing.
  • Adjustable amplitude from 100mV to 12V peak-to-peak
  • Gate trigger LED flashes in synch with the output frequency
  • This allows easy adjustment of the attenuation for proper gate triggering
  • EZ-Dial knob easily adjust output by 1
  • Pressing down and turning will select a faster dialing speed
  • EZ-Check switch for 0% and 100% span adjustments
  • Store EZ-Check values by pressing the EZ-Dial knob
  • Uses a standard 9V Alkaline Battery
  • Superior battery life of 45 hours under typical continuous usage
  • Easy access to battery compartment
  • Lightweight, Rugged and Reliable
  • Small, tough and protected to 60V
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PIE 541-RW Shown
Product Information
Datasheet 128 KB PDF
Manual 671 KB PDF
PDF HelpPDF Help

The Piecal 541 is the best tool for calibration, test, and diagnosing turbine meters, frequency counters, vibration systems, tachometers, flow meters, vortex shedders, integrators, and any other Frequency devices in the shop, plant and/or field.

The Practical Instrument Electronics 541 brings all the features you would expect from a frequency calibrator and timesaving ones. The PIECAL 541 comes with an LED indicator showing gate time for easy trigger level adjustment. Make adjustments with the EZ-Dial knob or test limits with the dual action EZ-Check switch.

Save hours of troubleshooting time on problems when compared to other calibration methods. When calibrating a totalizer, the PIE 541 eliminates the need of a stop watch. This calibrator will automatically stop when the selected number of pulses has been sent to the totalizer.

Function Description
Common Specifications for all Frequency Modes
Frequency Ranges  1CPH to 20.000Khz
Accuracy ± 0.005% of range
Temperature Effect ≤ 10ppm/°C of range
Frequency Ranges Specifications:
1 CPH< CPH Range < 20000 CPH
2 0.1 CPM (0.0167Hz)< CPM Range < 2000.0 CPM (33.33Hz)
3 0.01Hz < Hz < 200.00Hz
4 0.1Hz < Hz Range < 2000.0Hz
5 0.001KHz < KHz Range < 20.000KHz
6 Totalize inputs/outputs from 1 to 99999 counts in 0.1 minutes to 100.0 minutes
Read Inputs Specifications
Read x1 attenuation range: 0.1Vpk to 12Vpk
x10 attenuation range: 1Vpk to 120V peak – Limit of attenuation is 120Vpk
Input Impedance > 1 Meg Ω + 100pF
Adjustable Signal Attenuation Adjustable trigger level with X1 and x10 attenuation ranges
Miscellaneous Battery life ≥ 24 hour typical
Fuse-less protection  240Vrms
Waveforms Source Specifications
Output current >6mApp at 12Vpp output, 20KHz
Output Impedance < 25Ω
Square Wave Zero Crossing, Zero Based Selectable
Rise/Fall Time < 0.0001% of output Vpk per Second
Frequency Jitter < 0.5LSB of frequency range
Duty cycle 50% ± 2%
Sine Wave Offset and Zero Crossing Symmetry <± 10% of Vpk Output amplitude setting
 Amplitude Adjustment 100mV < Nominal Output < 12Vpp ± 10% of setting
General Specifications:
(Unless otherwise indicated all specifications are rated from a nominal 23 °C, 70 % RH for 1 year from calibration)
Temperature Range Operating -20 to 60 °C (-5 to 140 °F)
Storage -30 to 60 °C (-22 to 140 °F)
Relative Humidity Range 10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing
10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing
Size 7.00 X 3.30 X 2.21 inches (177.8 x 83.8 x 56.1mm)
Weight 12.0 oz (340 grams)
Battery 9V Alkaline
Miscellaneous Low battery indication with nominal 1 hour of operation left
Over-voltage protection to 120 Vrms (rated for 30 seconds) or 240 Vrms (rated for 15 seconds)
High contrast graphic liquid crystal display with 0.45" (11.4 mm) high digits
Ordering Information
Model Description Buy Now Price
541-RW PIE 541-RW Frequency Calibrator with Totalizer with 3 Year Replacement Warranty Buy Now
Included Accessories
  • 1 - Test Lead Set
  • 1 - NIST Calibration Certificate
Optional Accessories
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