21
Fuse Replacement
There is a user-replaceable fuse (F1) located on the rear panel of the instrument. It is located
behind a door in the Inlet-Power Switch-Fuse Holder device. The fuse rating is noted on the rear panel.
Do not attempt to replace it with a fuse of any other rating.
Use the following procedure to replace the fuse F1:
1. Turn the power switch to the O or OFF position.
2. Unplug the instrument from the source of supply.
3. Remove the power inlet cord from the instrument.
4. Using a small screwdriver, pry open the fuse holder door.
5. Replace the fuse with a new one of the correct rating.
6. Replace the fuse holder door and power inlet cord.
Initial Checkout Procedure
The following procedure will verify that the HT-S is working correctly. We recommend that this
procedure be conducted periodically to ensure proper operation of the tester. (A Compliance West HTT-1
or HTT-1R function tester may also be used to verify the HT-S is working correctly).
The following items are needed to conduct this procedure:
- An 18 AWG GL test lead (Alligator Clip/Banana Plug ends, black).
- Ground continuity connector clip.
- A piece of none insulated jumper wire (Not supplied)
CAUTION
High voltage (up to 2000 Volts AC and 2800 Volts DC or up to 3000 Volts AC and 4200 Volts
DC for HT-4200S) generated by the HT-S is exposed during this test. A risk of shock exists. Exercise care
when using the HT-S.
High Voltage Performance Test
1.
Disconnect all leads of the HT-S front panel.
2.
Turn the
Ground Check
switch on the rear panel to the Off position.
3.
Push the red
RESET
button. Verify the yellow
TEST
indicator is lit.
4.
Push the yellow
TEST
button.
5.
The Tester should conduct a test sequence. Confirm on the front meter that the HT-S can reach the
High voltage. At the end of the test, the
Ground OK
,
Ground Open
,
Full Voltage
,
Hipot Pass
, and
red
RESET
LED’s should be lit.
Ground Continuity Performance Test
1.
Disconnect all leads of the HT-S front panel.
2.
Turn the
Ground Check
switch on the rear panel to the On position.
3.
Push the red
RESET
button, then the yellow
TEST
button.
4.
The tester should sound the buzzer. The red
Ground Open
and red
RESET
LED’s should be lit.
5.
Connect the supplied Ground Continuity Connector Tip into the bottom round slot of the orange
receptacle located on the front panel or the GL Return Test Lead to the Ground Check receptacle
(HT-4200S only).
6.
Plug the supplied 18 AWG GL Test Lead (Alligator Clip/Banana Plug ends, black) into the
RETURN
receptacle on the front panel, then, connect the green alligator clip end to the Ground
Continuity Connector Tip previously connected on step 5.
