Practical Instrument Electronics 830 - Manual (Page 25)

Page 23
mA OUT, % OUT (Percent of 4 to 20 mA)
Find current leaks in loops caused by ground faults, moisture or
corrosion. The 830 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 Menu. Turn the knob e to scroll
through the settings and press the knob to make your selec-
tion. Select mA for the FUNCTION and PWR MEAS for the
MODE. Choose either mA or %.
2) Turn the knob e until the following menu appears.
3) Turn the knob e to scroll through the settings and press the
knob to make your selection. Turn on the LEAK DETECT.
4) Connect the red source lead from the mA (+) jack of the 830
to the plus (+) input of the device and the black source lead
from the mA (-) to the minus (-).
The PIE 830 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 830 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”
Using Ground Leak Detection
T/C
All mA∙ Read V
-
2 3
RTD
Ω
RTD
Ω
6 5
4
+
Source & Read Hz∙ mV
Source V∙ pH
- +
1
-
All milliamp connections
mA DIAGNOSTIC
> EXIT
LEAK DETECT OFF ON