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On the rear panel turn the
Ground Resistance
potentiometer, as soon as the potentiometer starts
turning, the meter will start blinking, displaying the letter “r” with the new limit value in
Ω.
Adjustment of Ground Continuity Offset
When the Ground Continuity test is activated, the offset function may used to compensate for lead
and test fixture resistance during the Ground Continuity test. To set the Ground Continuity offset follow the
steps bellow:
1.
Turn the
Ground Check
switch on the rear panel to the ON position.
2.
Turn Off the HT-S unit.
3.
Plug the supplied Ground Continuity Connector Tip into the bottom round slot of the orange
receptacle located on the front panel.
4.
Plug the supplied 18 AWG GL Test Lead (Alligator Clip/Banana Plug ends, black) into the
RETURN
receptacle on the front panel, then, connect in shortcut circuit the green alligator clip
end to the Ground Connector Tip connected on step 3. See Figure 6.
5.
For HT-4200S plug the supplied 18 AWG GL Test Lead (Alligator Clip/Banana Plug ends, black)
into the
RETURN
receptacle on the front panel Plug the supplied 18 AWG GL Test Lead into the
GROUND CHECK
receptacle on the front panel, then, connect in short-circuit both of the the
two green alligator clip end.
6.
Turn On the HT-S unit.
7.
Adjust the Ground Continuity Offset, by pressing and holding the
Ground Offset
button for 5
seconds on the rear panel, the new offset resistance reading should be shown on the front display
for a few seconds. If the display shows “Cnct”, the new offset adjustment will be discarded.
8.
To review the Ground Continuity Offset adjustment, by pressing and holding the
Ground Offset
Button on the rear panel for 1 second. The front display most shows “r0.00”
±
0.02
Ω
, otherwise
review the test cables of fixture and start over on step 2.
Figure 6. Short on the Ground Continuity Circuit
