Error Messages, Operating Errors E3-11 - Philips PM 5191 Operating Manual

3.5.5.
3.5.5.1.
3.5.5.2.
E 3-11
Error Messages, Operating Errors
Error Messages when Switching on
Apart from the normal service routines, the program memory of the PM 5191 contains a selftest routine
that starts automatically when the instrument is switched on. The selftest routine checks the battery
buffered RAM, the microprocessor RAM and the contents of the program memory (PROM).
Then all LEDs and segments of the numeric displays are switched on for approx. 3 s — any errors in the
decoders and drivers can then be recognised instantly.
If the selftest routine discovers an error, then one of the following error messages will appear in the
display:
Err 1 This is a PROM checksum error. The PROMs have to be replaced.
Err 2 The processor containing the working memory RAM has to be replaced.
Err 3 This is a checksum error of the battery buffered RAM, it lost its data since last being switched
off. This can be caused either by a defective Rattery, a defective RAM chip or a RAM test (see
diagnostic program).
Before servicing it is recommended to create new input data and to repeat the initial selftest.
Operating Instructions, Operating Errors
If the required setting of the equipment cannot be attained, then try once more using the examples
given (chapter 3.5.3. and 3.5.4.1).
Operating errors are indicated by a flashing display:
— FREQUENCY or LEVEL display flashes:
In step operation (working with the keys +STEP or —STEP) the permissible frequency or level range
is left. The display flashes three times and stops at the last value. (See chapter 3.5.3.1. and 3.5.3.2.).
— FREQUENCY display flashes continued:
Frequency is greater or smaller than the permissible frequency range of the selected wave form.
(See chapter 3.5.3.1.).
— LEVEL display flashes continued:
The input value exceeds the permissible range or Vpp + Vdc exceed + 15 V or — 15 V. (See chapter
3.2.).