Practical Instrument Electronics 820-ELITE - Manual (Page 17)

Page 15
READ
%
PWR MEASURE
28.20
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
mA ∙ V ∙ pH ∙ TC ∙ Ω ∙ RTD ∙ Freq ∙ Pressure
Typical
2-Wire
Transmitter
+ IN - REF +OUT-
Transmitter Input
Sensor
Process Signal
Simulated Input
SOURCE
HI
SET LO
MAX
READ
MIN
READ
Power/Measure mA, Power/Measure % (Percent of 4 to 20 mA)
Choose this function to simultaneously supply power to a 2 Wire
Transmitter while displaying the 4.000 to 20.000 mA output of
the transmitter.
Move the power switch w to READ then Double Click the
EZ-DIAL knob to get into the Double Click Menu. Turn the knob
e to scroll through the settings and press the knob to make your
selection. Select mA for the FUNCTION and PWR MEAS for the
MODE. Choose either mA or % and whether you need the 250
Ω
HART resistor active in the loop.
Disconnect one or both input wires from the device to be
calibrated. Connect the red source lead of the PIE 820-ELITE to
the plus (+) input of the device and the black source lead to the
minus (-).
The PIE 820-ELITE supplies a nominal 24 volts DC at 24 mA to
the 2 Wire Transmitter. The current passed by the transmitter will
be accurately displayed by the PIE 820-ELITE. Calibrate the
transmitter in the usual manner and disconnect the PIE
820-ELITE. Signals above 24 mA are current limited by protection
circuitry with “OVERRANGE” flashed on the display and the red
OVERLOAD LED lit.