SME Maintenance and Troubleshooting
1038.6002.02 4.1 E-13
4 Maintenance and Troubleshooting
The instrument does not need a periodic maintenance. What is necessary is essentially the cleaning of
the instrument. However, it is recommended to check the rated data from time to time.
4.1 Maintenance
4.1.1 Cleaning the Outside
The outside of the instrument is suitably cleaned using a soft, line-free dustcloth.
Caution! Do not use solvents such as thinners, acetone and similar things in any case, because
otherwise the front panel labeling or plastic parts will be damaged.
4.1.2 Storage
The storage temperature range of the instrument is -40 to +70 degrees Celsius. If the instrument is to
be stored for a longer period of time, it must be protected against dust.
4.1.3 Exchange of the Lithium Batteries
Caution!
The batteries used in the instrument are power lithium cells. Short-circuit and
charging of the batteries have to be avoided at all costs, as the batteries might
ohterwise explode. Do not open discharged batteries. They have to be disposed
of as hazardous waste.
The instrument contains a lithium battery for non-volatile storage of data in the CMOS-RAM. The battery
is located on the computer PCB.
Option SME B12 also contains a lithium battery for non-volatile storage of the data in the 8-Mbit RAM if
the instrument is switched off or if the option is removed.
The service life of these batteries depends on the operation and the ambient temperature, it is 5 years
on the average.
The battery voltages are checked after power-up of the unit (TEST POINT 0007 = RAM cell, TEST
POINT 1500 = XMEM cell). If the voltage values are below 2.5 V storage of data can no longer be
quaranteed and an error message is displayed.
In order to guarantee a perfect function, a flattened battery is to be replaced by a battery of the same
type:
- SAFT LS3 CNA, (R&S stock no. 565.1687) or
- ELECTROCHE QTC85 1/2AA 3B960, (R&S stock no. 565.1687).
Notes: – When the RAM-battery is exchanged, the stored data (SAVE/RECALL, LIST, MEM
SEQ, UCOR, lists for DIG MOD, IEC-bus address, calibration data) are lost. These
data have to be reprogrammed after the exchange of the battery. The calibration data
are reconstructed using the CALIBRATE ALL
➤
function in the UTILITIES-CALIB-ALL
menu.
– When the XMEM-battery is exchanged, the stored data of the memory extension are
lost and have to be reprogrammed.
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