• Easy to use
PIECAL Model 541
Frequency Calibrator with Totalizer
Operating Instructions
PIECAL Model 541
Frequency Calibrator with Totalizer
Operating Instructions
With the Model 541 you can check & calibrate all your frequency instruments and measure flow
sensors.
• Take it into the shop, plant or field
Carry it without worry - it comes with a carrying case and fits into your toolbox.
Accurate to ±0.005% of range.
• Calibrate in Hz, kHz , CPM and CPH
0.001 to 20.000 kHz
0.1 to 2000.0 Hz
0.01 Hz to 200.00 Hz
0.1 to 2000.0 CPM (Counts-per-Minute)
1 to 20000 CPH (Counts-per-Hour)
• Quickly output the frequency you need
Simulate vibration pickups and variable
speed drives with sine wave outputs and
flow meters and magnetic pickups with
square wave outputs. If you calibrate positive
displacement flow meters, Watt-hour meters
or slow rated integrators select frequencies
as slow as 1 CPH (0.0002777 Hz). Easily set
any value quickly to within 0.01 Hz with the
two speed adjustable EZ-Dial™ plus store
any three frequencies for instant recall with
the EZ-Check™ switch. Verify optical pickups
with the GATE TIME LED that is
synchronized with the output pulses.
• Match your instrument signal levels
Choose zero based or zero crossing square
or sine waves output from 0.1 V to 12 V
peak-to-peak. Measure from 0.1 V to 120 V
peak with X1 or X10 attenuation. Turn the
dial to adjust the output amplitude to the
level required.
• Read signals from flow meters
Measure flow meter, vibration, parts counter
and other process frequency signals from
0.1 V to 120 V. GATE TIME LED flashes with
received pulses indicating when the proper
input adjustment level is achieved.
• Calibrate totalizers without a stopwatch
Automatically output from 1 to 99999 pulses in 1 to 100 minutes. Easier and more accurate than
waiting around with the stopwatch to stop generating pulses at the correct time. Count input
pulses from 1 to 100 minutes to verify totalizer input signals.
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • sales@piecal.com • www.piecal.com
Copyright © 2011 All rights reserved • 541-9002 - Rev D 13 July 2011
Practical Instrument Electronics
Page 1
Basic Operation
HI
20000
SOUR CE
CPH 1 - 20000
q EZ-Check™ Switch/EZ-Step™ Push-button
For Source - Slide the switch to select from three user
stored values for the desired calibration points. The
HI, DIAL and LO values can easily be changed to suit
the calibration requirements. Press the push-button
like a stopwatch to start or stop the totalizer output.
For Read - Slide the switch to the DIAL position. The
Model 541 will begin making readings. Slide the
switch to high and you will get the highest point read
and then slide the switch to the low position and you
will get the lowest range. Press the push-button like a
stopwatch to start or stop the totalizer counting
pulses.
r MENU Key
Press and release the menu key to enable the
configuration menu. This allows you to choose
the settings for AUTO OFF, X1/X10, Zero Based/
Zero Crossing, EZ-Check HI/LO Readings,
SINE/SQUARE Wave output and reset to BASIC
CONFIGURATION.
t READ/GATE TIME Key
Press and release READ/GATE TIME key to step
through the read ranges.
Read CPH 1 - 20000
Read CPM 0.1 – 2000.0
Read HZ 0.01 – 200.00
Read HZ 0.1 – 2000.0
Read KHZ 0.001 – 20.000
Totalizer
Press and hold the READ/GATE TIME key to
enable time adjustment for Source & Read
Totalize mode.
Turn the EZ-Dial knob u to adjust the totalize time
from 1 to 100 minutes.
Press and release the SOURCE/AMPLITUDE or
STORE/CLEAR button to save your selection.
y STORE/CLEAR Key
For Source - press the STORE/CLEAR key to
save the calibration values. The display will flash
“STORED” to confirm.
For Read - press STORE/CLEAR to clear the
values saved in the EZ-Check™ HI and LO
positions. The display will flash “CLEARED” to
confirm.
w SOURCE/AMPLITUDE Key
Press and release the SOURCE/AMPLITUDE Key to
step through the source ranges.
Source CPH 1 - 20000
Source CPM 0.1 – 2000.0
Source HZ 0.01 – 200.00
Source HZ 0.1 – 2000.0
Source KHZ 0.001 – 20.000
Totalizer
Press and hold SOURCE/AMPLITUDE key to enable
amplitude adjustment. Turn the EZ-Dial knob
adjust the amplitude voltage from 0.1-12.0 Vp.
Press and release the SOURCE/AMPLITUDE or
STORE/CLEAR button to save your selection.
u
e ON / OFF Key
Press the ON/OFF key to turn the Model 541 on or off.
u
EZ-Dial™
For Source - turn the EZ-Dial knob to change
the output frequency in increments of one least
significant digit. Push down and turn for faster
dialing with increments of 100 digits.
For Read - turn the EZ-Dial knob to adjust the
trigger level.
CHANGING BATTERY
Low battery is indicated by “BAT” on the display.
Approximately one to four hours of typical
to
operation remain before the 541 will automatically
turn off. To change the battery remove the battery
cover from the back of the unit. Replace with a
single 9V battery.
Note: Alkaline battery is supplied and
recommended for maximum battery life &
performance.
Knob
Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • sales@piecal.com • www.piecal.com
Page 2
Configuration
Configure the Calibrator
Press and release the ON/OFF Key w to turn
the calibrator on then press and release the
MENU Key
Turn the EZ-Dial™ Knob to scroll through the list
of configuration options. Press the EZ-Dial™
Knob to change configuration items.
Press and release the MENU or STORE/CLEAR Key
to save your selection.
AUTO OFF - pressing the knob will toggle
between ON and OFF. If AUTO OFF is ON, the
unit will turn off after 30 minutes of inactivity to
save battery life. If AUTO OFF is OFF the unit
will stay on until the ON/OFF key is pressed. Set
If you are using the Totalizer functions for over
30 minutes you should set AUTO OFF to OFF.
Press and release the MENU or STORE/CLEAR Key
to save your selection.
X1/X10 - pressing the knob will toggle between
X1 and X10 attenuation while reading frequency.
Choose X1 when you are measuring signals
with amplitudes between 0.1 and 12 V peak and
X10 when measuring between signals with
amplitudes between 12 and 120 V peak.
Press and release the MENU or STORE/CLEAR Key
to save your selection.
r to enable the configuration menu.
>AUTO OFF ON
X1/X10 X10
0 XING/BASED BASED
EZ-CHECK ON
SINE/SQ SQ
BASIC CONFIGURATION
Default Settings Shown
0 XING/BASED - pressing the knob will toggle
between zero crossing and zero based output
waveforms. Select zero crossing when the
instruments you are calibrating require a
waveform that has both positive and negative
peaks that are centered around zero. Select zero
based when the instruments you are calibrating
require only positive signals.
Note: To simulate negative only signals select
zero based and connect the red lead to the
ground and the black lead to the input connection
of the instrument being calibrated.
Press and release the MENU or STORE/CLEAR Key
to save your selection.
EZ-CHECK - pressing the knob will toggle
between ON and OFF. Select ON to have the
highest and lowest measured frequencies
recalled by moving the EZ-Check switch on the
side of the calibrator to HI or LO. Select OFF and
the currently measured freqency will be
displayed regardless of the position of the
EZ-Check switch.
Press and release the MENU or STORE/CLEAR Key
to save your selection.
SINE/SQ - pressing the knob will toggle between
SINE and SQ. Select SINE when the instruments
you are calibrating require a sine wave and SQ
when the instruments you are calibrating require
a square wave or pulse input.
Press and release the MENU or STORE/CLEAR Key
to save your selection.
BASIC CONFIGURATION - pressing the knob
will restore the 541 to the basic configuration
with factory defaults as shown in the menu
diagram. Output values stored in the EZ-Check
HI and LO positions are not changed.
Press and release the MENU or STORE/CLEAR Key
to save your selection.
Note: All settings are remembered even with the
power off. Removing the batteries resets the
configuration to factory defaults (Basic
Configuration) and resets the EZ-Check HI and
LO outputs to factory values.
Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • sales@piecal.com • www.piecal.com
Page 3
SOURCE
Calibrating Frequency Instruments
Choose this function to provide a frequency
signal into flow meters or any input devices that
measure frequency signals.
1) Disconnect the input signal from the device
to be calibrated.
2) Press and release the SOURCE/
AMPLITUDE Key until the desired frequency
range is displayed
3)
Press and hold SOURCE/AMPLITUDE key to
enable amplitude adjustment. Turn the EZ-Dial
knob u to adjust the amplitude voltage from 0.1-
12.0 Vp.
Press and release the SOURCE/AMPLITUDE or
STORE/CLEAR button to save your selection.
4)
Connect the 541 to the input of the device to be
calibrated.
Turn the EZ-Dial knob u to change the output frequency in increments of one least significant digit.
Push down and turn for faster dialing with increments of 100 digits.
Move the EZ-Check slide switch q on the side of the calibrator up to recall the HI output value and
down to select the LO output value.
w.
HI
20000
CPH 1 - 20000
SOUR CE
Storing EZ-Check Outputs
STORING HI and LO EZ-Check Outputs
1) Store your high (SPAN) output frequency by moving the EZ-Check switch q to the HI position
and turn the EZ-Dial knob u until the desired frequency is on the display. Press the STORE/
CLEAR Key and STORED appears on the display.
2) Store your low (ZERO) output frequency by moving the EZ-Check switch
and turn the EZ-Dial knob u until the desired frequency is on the display. Press the STORE/
CLEAR Key and STORED appears on the display.
3) Instantly output your SPAN and ZERO frequency outputs by moving the EZ-Check switch q
between HI and LO. You may also select any third frequency output (such as mid-range) using
the middle position on the EZ-Check switch.
q to the LO position
Calibrating Optical Pickups
Position the optical pickup to be verified over the green GATE TIME LED. The LED is synchronized
to the pulse output of the 541. Follow the Calibrating Frequency Instruments section to adjust the
output frequency.
Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • sales@piecal.com • www.piecal.com
Page 4
Calibrating Totalizers
Choose this function to provide a number of pulses for a set time into parts counters or totalizers.
1) Disconnect the input signal from the device to be calibrated.
2) Press and release the SOURCE/AMPLITUDE Key until
3)
Press and hold the READ/GATE TIME key to enable time adjustment.
adjust the totalize time from 1 to 100 minutes. Press and release the
button to save your selection.
4)
Turn the EZ-Dial knob u to select the number of pulses you would like to output with increments of 1 count.
Push down and turn for faster dialing with increments of 100 counts.
5)
Connect the 541 to the input of the device to be calibrated.
5)
Press the EZ-Step push-button q like a stop watch to start outputting pulses.
The word RUN will appear on the display and the 541 display increments with each pulse while the
totalizer is running. When the selected number of seconds has elapsed the word STOP appears on
the display and the total number of pulses sourced during the time appears on the display.
Press the EZ-Step push-button q like a stop watch to stop or re-start totalizing.
Note: If you are using the Totalizer functions for over 30 minutes you should set AUTO OFF to OFF
(see Configure the Calibrator on page 3).
TOTALIZER appears on the display.
READ/GATE TIME
Turn the EZ-Dial knob u to
or STORE/CLEAR
CPM/CPH CONVERSIONS
To Convert From: To: Divide By: To Convert From: To: Multiply By:
CPM Hz 60 Hz CPM 60
CPH Hz 3600 Hz CPH 3600
Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • sales@piecal.com • www.piecal.com
Page 5
Measuring Frequencies
READ
Choose this function to measure frequency from flow, vibration sensors or frequency outputs.
1) Disconnect the frequency sensor from any
other device.
Press and release READ/GATE TIME Key t to
2)
step through the read ranges.
3)
Connect the 541 to the output of the device to be
calibrated.
4)
Turn the EZ-Dial knob u to adjust the trigger
level of the 541. The LED will light when the 541
locks onto the input signal indicating that it is
properly detecting the signal.
HI
20000
CPH 1 - 20000
SOUR CE
Totalize (Count Pulses)
Choose this function to verify that parts counters or totalizers are working correctly.
1) Disconnect the frequency sensor from any other device.
Press and release READ/GATE TIME key t to step through the read ranges until TOTALIZER appears on
2)
the display.
3)
Press and hold the READ/GATE TIME key to enable time adjustment.
adjust the totalize time from 1 to 100 minutes. Press and release the
button to save your selection.
3)
Connect the 541 to the output of the device to be calibrated.
4)
Turn the EZ-Dial knob u to adjust the trigger level of the 541. The LED will light when the 541 locks onto
the input signal indicating that it is properly detecting the signal.
5)
Press the EZ-Step push-button q like a stop watch to start totalizing.
READ/GATE TIME
Turn the EZ-Dial knob u to
or STORE/CLEAR
The word RUN will appear on the display and the 541 displays increments with each pulse while the
totalizer is running. When the selected number of seconds has elapsed the word STOP appears on
the display and the total number of pulses counted during the time appears on the display.
Press the EZ-Step push-button q like a stop watch to stop or re-start totalizing.
Note: If you are using the Totalizer functions for over 30 minutes you should set AUTO OFF to OFF
(see Configure the Calibrator on page 3).
Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • sales@piecal.com • www.piecal.com
Page 6
Model 541 Specifications
(Unless otherwise indicated all specifications are rated from a nominal 23 °C,
General
Accuracy ±0.005% of Range
Ranges 0.001 to 20.000 kHz
Operating Temperature Range -25 to 60 °C (-10 to 140 °F)
Temperature Drift ± 0.01% of span outside of 23°C ±10 °C (73°C ±18 °F)
Relative Humidity Range 10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing
Size 7.00 X 3.30 X 2.21 inches (177.8 X 83.8 X 56.1 mm
Weight 12.0 oz (340 grams) (including battery)
Batteries & Battery Life One “Alkaline 9V (6LR61), 45 Hours
Low Battery Low battery indication with nominal 1 hour of life left
Protection against mis-connection Over-voltage protection to 120 Vrms rated for 30 seconds
Display High contrast graphic liquid crystal display.
Normal Mode/Common Mode Rejection 50/60 Hz, 50 dB/ 50/60 Hz, 90 dB
Read Frequency
Input Impedance
Signal Attenuation Adjustment Range Adjustable trigger level with X1 (0.1 V peak to 12.0 V peak)
Note on reading slow sine waves High signal noise and low slew rate (Volts-per-second) will
70 % RH for 1 year from calibration)
0.1 to 2000.0 Hz
0.01 to 200.00 Hz
0.1 to 2000 CPM (Counts-per-Minute)
1 to 20000 CPH (Counts-per-Hour
10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing
or 240 Vrms for 15 seconds
> 1 Megohms + 100pF
and X10 (1 V Peak to 120 V peak)
affect reading uncertainty
Source Frequency
Output Impedance < 25 Ohms
Source Current > 6 mA at 12 V peak-to-peak, 20 kHz
Amplitude Adjustment Range & Accuracy 0.1 to 12.0 V peak ±10% of setting
Square Wave (Pulse)
Rise/Fall Time
Frequency Jitter
Duty Cycle
Sine Wave
Offset and Zero Crossing Symmetry <±10% of V peak output amplitude setting
Selectable Zero Based or Zero Crossing
<0.0001% of output V peak per second
<0.5 Least Significant Digit of full scale value
50% ±2%
Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • sales@piecal.com • www.piecal.com
Page 7
Accessories
Included:
“9V” Alkaline battery, Certificate of Calibration
Large Carrying Case with PIE Logo Part No. 020-0204
Additional Information
This product is calibrated on equipment traceable to NIST and includes a Certificate of Calibration.
Test Data is available for an additional charge.
Practical Instrument Electronics recommends a calibration interval of one year. Contact your local
representative for recalibration and repair services.
Warranty
Our equipment is warranted against defective material and workmanship (excluding batteries) for a
period of three years from the date of shipment. Claims under warranty can be made by returning
the equipment prepaid to our factory. The equipment will be repaired, replaced or adjusted at our
option. The liability of Practical Instrument Electronics (PIE) is restricted to that given under our
warranty. No responsibility is accepted for damage, loss or other expense incurred through sale or
use of our equipment. Under no condition shall Practical Instrument Electronics, Inc. be liable for any
special, incidental or consequential damage.
Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • sales@piecal.com • www.piecal.com
Page 8
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