525A
Basic Maintenance
To Check or Replace a Fuse
1. Disconnect line power.
2. Using a flat-blade screwdriver, pry the tab at the base of the line fuse compartment.
The compartment cover will pop part way out.
3. Remove the compartment cover. The fuses come out with the compartment cover and
can easily be checked or replaced.
4. To reinstall the fuse, push the compartment cover back into the compartment until the
tab locks in place.
Note
When changing the line voltage setting, make sure to verify that the
appropriate line fuse is installed in the Calibrator. Replace the fuse as
required.
Table 2. Replacement Fuses
Part NumberFuse DescriptionLine Voltage Setting
1645311W Fuse, 0.25 A fast fuse120 V (90 V to 132 V)
1645327W Fuse, 0.125 A fast fuse240 V (198 V to 264 V)
Changing Line Voltage
The Calibrator arrives from the factory configured for the line voltage appropriate for the
country of purchase or as specified when it is ordered. To verify the line voltage setting,
check the line voltage indicator on the line power fuse compartment cover.
Note
Confirm that the line voltage selection is set for 120 V for line voltages
between 90 V and 132 V or that the selector is set to 240 V for line voltages
between 198 V and 264 V.
To change the line voltage:
1. Disconnect line power.
2. Using a flat-blade screwdriver, pry the tab at the base of the line fuse compartment.
The compartment cover will pop part way out.
3. Remove the compartment cover.
4. Remove the line voltage selector assembly by gripping the line voltage indicator tab
with pliers and pulling it straight out of the compartment.
5. Rotate the line voltage selector assembly to the desired voltage and reinsert.
6. Verify the appropriate fuse is being used for the selected line voltage (see Table 2)
and reinstall the fuse compartment by pushing it in until the tab locks in place.
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