Practical Instrument Electronics 820 - Manual (Page 13)

Page 11
To
Sensor
Typical
2-Wire
Transmitter
(Disconnected)
+ IN - REF +OUT-
Receiver
Powers External
2-Wire Transmitter
Power Supply
(2 to 100 VDC)
SOURCE
HI
SET
LO
MAX
READ
MIN
READ
2 Wire SIM mA, 2 Wire SIM % (Percent of 4 to 20 mA)
Choose this function to simulate a 2 Wire Transmitter output from
0.00 to 24.00 milliamps. Operates in loops with power supply
voltages from 2 to 60 VDC.
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 2W SIM 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.