Practical Instrument Electronics 820 - Manual (Page 24)

Page 22
Frequency Source
Choose this function to provide a frequency signal into any input
devices that measure frequency.
Move the power switch w to SOURCE 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 input of the device matching
polarity.
The green HZ SYNC LED pulses in synch with the output pulses
and may be used to calibrate optical pickups. The output signal
is a zero crossing square wave with a fixed amplitude of 6 V
peak-to-peak from -1 and + 5 V.
Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO. You may also select
any third output setting (such as mid-range) using the SET
position on the EZ-CHECK switch. The output is adjusted in 1
count increments by turning the knob
e . Press and turn the
knob for faster dialing with 100 count increments.
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
KHz
20.000
HI
Frequency Receiver Input
Flowmeter
Transmitter
Computer
Logger
Controller
DCS