PIE Model 541 Frequency Calibrator

Overview PIE Model 541 Frequency Calibrator

The PIE Model 541 Frequency Calibrator with Totalizer is a dedicated calibration and troubleshooting tool engineered for frequency-based instrumentation. Manufactured by PIE Calibration, the Model 541 is designed to simplify calibration of flow meters, turbine meters, tachometers, vibration systems, vortex meters, frequency counters, and totalizers —both in the shop and in the field.

Unlike traditional methods that rely on stopwatches and manual calculations, the PIE 541 integrates a built-in totalizer, dramatically reducing calibration time and eliminating common sources of error.

Features and Performance

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Advanced Frequency Calibration
Generate multiple waveform types:

- Sine waves
- Zero-based square waves
- Zero-crossing square waves

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Wide Frequency & Pulse Range
Compatible with common industrial signal ranges:

- 0.001 kHz to 20.000 kHz
- 0.1 Hz to 2,000 Hz
- 0.01 Hz to 200 Hz
- 0.1 CPM to 2,000 CPM
- 1 CPH to 20,000 CPH

- Built-In Frequency Counter
Measure input waveforms from 0.1 V to 120 V peak-to-peak, enabling direct verification of real-world signals.
- Integrated Totalizer Function
Totalize 1 to 99,999 counts over a selectable period from 0.1 to 100 minutes.
The calibrator automatically stops after the preset pulse count—no stopwatch required.
- EZ-Dial™ Precision Control
Smooth rotary adjustment allows fast, accurate frequency setting.
- EZ-Check™ Dual-Action Switch
Instantly test calibration limits and verify instrument response.
- LED Gate Time Indicator
Visual confirmation of gate timing simplifies trigger level adjustments and improves accuracy.
- Field-Ready Design
Compact, lightweight, and battery powered for portable calibration work.

Why You Should Buy it

- Purpose-built for frequency and totalizer calibration
- Eliminates manual timing and calculation errors
- Saves significant troubleshooting and calibration time
- Replaces discontinued Altek 941 and 942 models
- Ideal for flow, turbine, vibration, and tachometer systems
- Includes NIST calibration certificate
- Backed by a 3-year factory warranty