HT instruments HT8000 - Manual (Page 14)

HT8000
EN - 13
5. MAINTENANCE
5.1. GENERAL INFORMATION
1. This is a precision instrument. To guarantee its performances be sure to use it
according to these instructions and keep it stored on suitable environmental conditions.
2. Do not expose it to high temperatures or humidity or direct sunlight.
3. Be sure to turn it off after use. If you expect not to use the instrument for a long period
remove batteries to avoid leakages of battery liquid which could damage the its inner
components.
5.2. BATTERY REPLACEMENT
When the symbol "
" is displayed, battery need replacement.
CAUTION
Before replacing battery disconnect the test leads from any energized
circuits to avoid electrical shocks
1. Switch OFF the meter
2. Disconnect the test leads from the input terminals
3. Unscrew the fixing screw and remove the cover of battery case
4. Disconnect the battery and insert a new battery of the same type (see § 6.1.2)
observing the proper polarity
5. Re-screw the cover of battery case
6. Use the appropriate battery disposal methods for your area
5.3. FUSES REPLACEMENT
CAUTION
The FUSE1 or FUSE2 replacement is necessary in the herewith situations:
 FUSE1  On DC voltage generation no signal is given by the instrument
 FUSE2  On DC current measurement the instrument always shows the
“0.000” indication with a input signal applied
 FUSE2  On DC current generation the “OUTPUT” symbol is always
blinking at display and no signal is given by the instrument
1. Turn OFF the meter
2. Disconnect the test leads from the input terminals
3. Unscrew the fixing screw and remove the cover of battery case
4. Unscrew the four fixing screws and remove the lower part of the case
5. Unscrew the two fixing screws of the PCB internal protection and remove it
6. Remove the defective fuse and install a new fuse of the same size (see § 6.1.2)
7. Re-screw the PCB internal protection
8. Re-screw the lower part of the case
9. Re-screw the cover of battery case
5.4. CLEANING
To clean the instrument use a soft dry cloth. Never use a wet cloth, solvents or water.
5.5. END OF LIFE
CAUTION: this symbol indicates that equipment its accessories and battery shall
be subject to a separate collection and correct disposal