B - 4
TC305/TC303 - Service
3 SERVICE, TROUBLESHOOTING AND REPAIR
If you can't switch the calibrator on at all, the most obvious fault is empty battery.
If charging doesn't help, check the battery voltage from the battery terminals. If
the battery is ok, but you still can't start the calibrator, the fault is obviously in
internal cabling or on the main processor board. If your device stops and shows
an error code, write down the shown code number and switch the calibrator off.
Wait five seconds and switch the calibrator on to see, if the error remains. If the
error remains or repeats later, see the following chapters for more help. Only
board level service is explained. Component level trouble shooting would require
detailed knowledge both of the hardware and of the software.
If the fault is obvious or if you can locate it using the information given in this
manual, you can perhaps repair it locally. Otherwise, send the device to the
manufacturer or to the representative for repair. In case of warranty repair, always
send the device to us or to our representative. Most representatives can carry out
board level trouble shooting and replace faulty boards or units.
3.1 Disassembling and reassembling the calibrator
The calibrator must be taken apart in case of software update, read/write memory
installation, battery replacement or hardware trouble shooting. The following steps
are required to disassemble TC305/TC303:
∗
Switch off the calibrator.
∗
Loosen the four screws on the bottom of the calibrator.
∗
Carefully lift the rear of the cover and remove the cover.
∗
Remove the handle and the handle springs.
∗
Remove the two screws holding the front assembly.
∗
Loosen the front assembly cable connectors from the processor boards
below it and from the analog i/o assembly.
∗
Remove the four screws on the front and rear of the analog i/o assembly.
∗
Lift the analog i/o assembly and loosen its cable connectors from the
processor boards.
Reassembling requires opposite steps. If the front assembly has been removed,
TC305/TC303 looses date, time and all data stored in the read/write memory.
This includes Working Memory, Data Memory and all configuration settings.
Calibration data as well as installation of software options do not change,
because they are stored in the non-volatile EEPROM memory. Setting of date,
time and all configurations is explained in part C of the instruction manual. After
disassembly, TC305/TC303 may show error message 'ERROR CODE 7'. If this
happens, switch the unit off for 5 seconds and try to switch on again.
Note:
When disassembling a TC305/TC303, all special sensor definitions will be
Summary of Contents for TC303
Page 4: ...FUNCTIONAL DESCRIPTION ...
Page 5: ......
Page 9: ...SERVICE ...
Page 20: ...CALIBRATION ...
Page 36: ...SERIAL COMMUNICATION ...
Page 53: ...APPENDIXES ...