Practical Instrument Electronics 820 - Manual (Page 25)

Page 23
Read Frequency
Choose this function to count frequency.
Move the power switch w to READ then Double Click the
EZ-DIAL knob to get into the Double Click Menu. Turn the knob
to scroll through the settings and press the knob to make your
selection. Select FREQ for the FUNCTION and 20KHZ,
10000HZ, 1000HZ or 2000CPM for the RANGE.
Disconnect all input wires from the devices to be calibrated and
connect the PIECAL 820 to the output of the device matching
polarity.
The green HZ SYNC LED pulses in synch with the input
frequency.
Signals above the maximum scale are limited by protection
circuitry with “OVERRANGE” flashed on the display and the red
OVERLOAD LED lit.
The PIECAL 820 measures the input signal and constantly
updates the display with the current reading. Move the
EZ-CHECK switch
q to MAX to see the highest reading and to
MIN to see the lowest reading. Press and hold the knob e to
clear the MAX and MIN readings.
All Frequency
Connections Process Calibrator
mA ∙ V ∙ TC ∙ Ω ∙ RTD ∙ Hz
SOURCE
HI
SET
LO
OFF
MAX
READ
MIN
READ
OVERLOAD Hz SYNC
Double Click
Menu
Push & Turn
for
Fast Dialing
Push & Hold
to
Store/Step
READ
Hz
820.00
Voltage Output Signal
Flowmeter
Flow Sensor
Variable Speed Drive
Controller
Transmitter
All Frequency
Connections