Almeco ALMEMO V5 5990-2, Руководство по эксплуатации

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12. TROUBLESHOOTING
The data logger ALMEMO
®
5990-2 can be configured and programmed in
many different ways. It allows for a connection of many different sensors,
additional measuring instruments, alarm signalisers and peripheral devices.
Due to the large variety of options it is possible that, under certain conditions, it
does not perform as the user would expect. In most cases this will not be
related to a defective device but to operating errors such as wrong settings or
an inadmissible wiring. The following tests should be performed to correct or to
correctly identify the error.
Error:
No display at all or faulty display, no key response.
Remedy:
Check power supply, recharge battery, switch off and on again,
reinitialise, if required (see 3.4).
Error:
Incorrect measured values.
Remedy:
Thoroughly check the entire programming of the channel (particularly
base and zero point) (menu ´Sensor Programming´ and ´Special
Functions´.
Error:
Varying meas. values, segment test or blockage during operation.
Remedy:
Check cabling for inadmissible electrical connection,
disconnect all suspicious sensors,
connect hand-held sensors and operate them in air or connect
dummies (short circuit AB at thermocouples, 100 ohms at Pt100
sensors) and check,
then reconnect sensors successively and check.
If an error occurs with one sensor, check the wiring, isolate the
sensor if necessary, prevent influences from disturbances by
shielding or twisting.
Error:
Data transmission via interface does not function.
Remedy:
Check interface module, connections and setting:
Are both devices set to the same baud rate and transmission mode
(see 10.3)?
Is the correct COM interface addressed at the computer?
Is a printer in ONLINE mode?
Are the handshake lines DTR and DSR active?
A small interface tester with LEDs is very useful for checking the data
flow and the handshake lines (during standby mode the data lines TXD
and RXD are on a negative potential of approximately -9V and the diodes
are illuminated green. The handshake lines DSR, DTR, RTS and CTS
have a positive voltage of approxi9V and the LEDs are
illuminated red. During the data transmission the data lines must flash
red).
68 ALMEMO
®
5990-2
Troubleshooting