Frequency Read & Source Calibrator

• Accuracy ± 0.005% of range

• Source and Read

• Six Ranges 1 count per hour to 20.000Khz

• Calibrate Totalizer input and outputs from 1 to 99999

• Count Pulses 1 to 99999

• LED indicator for gate time

• Read a wide range of Frequencies and Waveforms

• Read 50mV to 120V peak

• Read signals from Flowmeter pickups, Velocity and

• Motion Detectors

• Totalizers

• Frequency from 1CPH to 20 KHz

• Adjustable amplitude from 100mV to 12Volts peak-to-peak

• Simulates Vibration Pickups, Variable Speed Drives and more

Output a number of pulses from 1to 100 minutes

The LED flashes in synch with theoutput frequency. This allows easy adjustment of the
attenuation for proper gate triggering.

• True ±0.005% of range accuracy

• Bar graph for quick reference of trigger level and output levels, 5% of frequency range
  High contrast graphic display viewable in all lighting conditions and angles

EZ-Dial™Knob

Change the speed of dialing yourtest point by just pushing down on the knob

EZ-Check™Switch

Stop watch style push button foraccurate totalizer measurements and for high and low readings

Superior battery life of 24 hoursunder typical continuous usage

Easy access to battery compartment

Fuse-less protection fromaccidental misuse

Convenient Velcro® hand strapallows for a firm confident grip or attachment to pipes and ladders.

The Practical InstrumentElectronics’ Model 541 is the best tool for calibration, test, and diagnosing
turbine meters, frequency counters, vibration systems, tachometers, vortexshedders, integrators,
and any other Frequency devices in the shop, plant and/or field. The Model 541brings all the features
you would expect from a frequency calibrator and timesaving new ones. The model541 comes with an
LED indicator showing gate time for easy trigger level adjustment. Makeadjustments 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 atotalizer,
the model 541 eliminates the need of a stop watch. This calibrator willautomatically
stop when the selected
number of pulses has been sent to the totalizer.

(Unless otherwise indicatedall specifications are rated from a nominal 23 °C, 70 % RH
for 1 year from calibration)
Operating Temperature Range -20 to 60 °C (-5 to 140 °F) Storage Temperature
Range -30 to 60 °C (-22 to 140 °F)

Relative Humidity Range 10 %≤RH ≤90 % (0 to 35 °C), Non-condensing

10 % ≤RH≤ 70 % (35 to60 °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 batteryindication with nominal 1 hour of operation left

Over-voltage protection to 120Vrms (rated for 30 seconds) or 240 Vrms
(rated for 15 seconds)

High contrast graphic liquidcrystal display with 0.45″ (11.4 mm) highdigits

Frequency Ranges 1CPH to 20.000KhzAccuracy ± 0.005% of range
Temperature Effect ≤ 10ppm/°C of range

• 1 CPH< CPH Range < 20000 CPH

• 0.1 CPM (0.0167Hz)< CPM Range < 2000.0 CPM (33.33Hz)

• 0.01Hz < Hz < 200.00Hz

• 0.1Hz < Hz Range < 2000.0Hz

• 0.001KHz < KHz Range < 20.000KHz

• Totalize inputs/outputs from 1 to 99999 counts in 0.1 minutes to 100.0 minutes

Calibration Certificate

• NIST Traceable Certificate provided

• Option: Test data available upon request at additional charge.