12
PRS-812 Resistance Meter
2.
Press the Red ON/OFF power button. The instrument display should become energized, each
LED will be tested in sequence, and
Good
will is displayed in the LCD if the batteries have
sufficient test capacity.
3.
Allow the instrument circuits to warm-up for a few minutes;
approximately 2 - 3 minutes are sufficient, prior to completing the
calibration sequence.
4.
Press the Yellow RESET, then the Gray CLEAR button within ½
second. The message
CAL
will be displayed in the LCD. (See
Figure 6)
5.
Press the Yellow RESET button to complete low range (0.1 to 10
ohm) calibration. The
CAL
message will automatically be cleared
when RESET is pressed. (See Figure 7)
6.
Press the Green TEST button. Indicated resistance should be
1.02 (
0.02) ohms as shown in Figure 7. Press RESET to clear
the display. NOTE: If 1.02 (
0.02) ohms is not displayed, repeat
the calibration process.
7.
Remove the calibration shunt from the lead terminals
8.
The PRS-812 is now ready for wide range measurements from
0.1 to 1.0E+12 Ohms
Figure 6:
Start the Calibration Sequence
by Pressing RESET then CLEAR within ½
Second
Figure 5:
Low Resistance Range Calibration Shunt Installation.
Low Resistance Calibration Shunt
Installed in PRS-812 Terminals
PRS-812 Low Calibration Shunt
Calibration Reference
Resister
1
2