Practical Instrument Electronics 820 - Manual (Page 12)

Page 10
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
HI
mA
20.00
Milliamp Receiver Input
Controller
Transmitter
Computer
Logger
I/P
DCS
All milliamp connections
mA SOURCE/ % SOURCE (Percent of 4 to 20 mA)
Choose this function to provide an output from 0.00 to 24.00
milliamps. The compliance voltage is a nominal 24 VDC to
provide the driving power to your milliamp receivers.
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 mA for the FUNCTION and SOURCE for the
MODE. Choose either mA or % and whether you need the 250
Ω
HART resistor active in the loop.
Connect the output leads of the PIECAL 820 to the inputs of the
device being calibrated, making sure to check polarity. Red lead
to the plus (+) input and black lead to the minus (-) input.
Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO (defaults to 20 & 4
mA). 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 0.01 mA (0.1%) increments by turning
the knob
e . Press and turn the knob for faster dialing with 1.00
mA (10.0%) increments.