Practical Instrument Electronics 820-ELITE - Manual (Page 18)

Page 16
mA OUT, % OUT (Percent of 4 to 20 mA)
Find current leaks in loops caused by ground faults, moisture or
corrosion. The 820-ELITE simultaneously supplies power to a 2
Wire Transmitter (or loop with a transmitter) while displaying the
4 to 20 mA output and the amount of current leaking in the loop.
1) 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
PWRM LEAK for the MODE. Choose either mA or %.
2) Connect the red source lead from the mA (+) jack of the 820-
ELITE to the plus (+) input of the device and the black source
lead from the mA (-) to the minus (-).
The PIE 820-ELITE supplies a nominal 24 volts DC at 24 mA to
the 2 Wire Transmitter or loop. The current passed by the
transmitter will be accurately displayed by the 820-ELITE along
with an indication of leakage current at the top of the display. If
there is an uncontrolled loop, a transmitter with upscale burnout
and bad or missing sensor or a short the display shows "OVER
RANGE”
Note: Many installed transmitters will normally indicate 0.01 to
0.02 mA leakage without significant control problem. Unstable
readings may indicate loose connections or the presence of
moisture.
Using Ground Leak Detection
All milliamp connections