Changing The Fuse - Teledyne IR7000 Operating Instructions Manual

Maintenance 6
5. Disconnect the positive and negative wires from the battery.
6. Remove the 4 screws and the ground wire from the hold down
plate across the battery. Remove the plate.
7. Exchange the battery with a new battery P/N 5215. Orient the
battery so that the positive terminal is facing the front panel
and toward the center of the instrument.
CAUTION: Use only the factory approved replacement battery. Using any
other battery could damage the instrument.
8. Reinstall the hold down plate together with the ground wire.
9. Connect the positive and negative wires to the proper
terminals.
CAUTION: Make sure proper polarity is observed. Severe damage to the
unit can occur if these terminals are reversed.
10. Reassemble the cover and reattach the probe.
With the instrument on, check the display for a "BATTERY LOW"
message. If this appears, charge the new battery for 1 hour before placing
the instrument into service.

6.2.5 Changing the Fuse

If the instrument fails to power up and there is no display, check that
AC power is available and the instrument OFF/ON switch is ON. On the
portable model, make sure that the power is ON and that the battery is
charged. If there is still no power check the fuse.
The fuse is located in the power entry module (inside the instrument
case in the battery portable. See Figure 6-3.)
To change the fuse:
1. Flush the instrument with nitrogen for 15 minutes.
2. Turn off the instrument and remove the power cord from the
power entry module ( if portable, remove the battery charger.)
3. Locate the fuse holder and pop out the fuse.
4. Replace with a 1A or 2A, 250V fuse.
5. Reconnect the AC power.
6. Turn the instrument ON.
60 Teledyne Analytical Instruments., - Rev. 3
Figure 6-3: Fuse Location.
IR7000