Ahlborn ALMEMO 8590-9, Руководство по эксплуатации

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11. TROUBLE-SHOOTING
Data acquisition modules ALMEMO
®
8590-9 and 8690-9A can both be config-
ured and programmed in many versatile ways. Each one is suitable for connect-
ing a wide variety of very different sensors, additional measuring instruments,
alarm signaling devices, and peripheral equipment. Given these numerous pos-
sibilities the device may in certain circumstances not behave quite as expected.
The cause of such unexpected behavior is only very rarely a device defect; more
usually it is incorrect operation by the user, an invalid setting, or unsuitable ca-
bling. In such event try to pinpoint and clear the problem with the aid of the
following tests.
Error No or all LEDs light up, no reaction from the keys
Remedy Check the power supply, charge the battery, switch off and then on again.
If necessary, re-initialize; (see 6.5).
Error Measured values are incorrect.
Remedy Check all the channel programming very carefully, especially the base value
and zero-point (sensor programming and special functions).
Error Fluctuating measured values or the system hangs in mid-operation.
Remedy Check the cabling for any inadmissible electrical connections.
For sensors with their own power supply check element flag 5; see 7.3.
Unplug any suspicious sensors.
Connect hand-held sensors in air or phantoms (for thermocouples short-circuit
AB, for PT100 sensors use 100

) and check.
Connect the sensors again one at a time and check successively.
If a fault persists for any one connection, then check all wiring; if necessary,
isolate the sensor and eliminate interference by using shielded or twisted wir-
ing.
Error Data transmission via the interface does not function.
Remedy Check interface module, connections, and settings.
Are both devices set to the same baud rate and transmission mode ? (see
Manual 6.10.12).
In the event of a reset (see 6.5) with the interface module connected, the baud
rate will be set to 9600 baud.
Is the correct COM interface on the computer being addressed ?
Are the handshake lines DTR and DSR active ?
To check the data flow and the handshake lines a small interface tester with
LEDs comes in very handy; (in ready-to-operate status the data lines TXD,
RXD carry negative potential of approx. -9V and the LEDs light up green,
whereas the handshake lines DSR, DTR, RTS, CTS carry approx. +9V posi-
tive voltage and the LEDs light up red; for the duration of data transmission
the data LEDs must flash red).
Check data transmission by means of a terminal (AMR-Control, WIN-Control,
WINDOWS-Terminal).
Address the device using its assigned device number´ Gxy ´ (s. Man. 6.2.1).
Enter <ctrl Q> for XON, if the device is in the XOFF status.
Check the programming by means of ´ P15 ´ (see Manual 6.2.3).
Test only the transmit line by entering the start command ´
S2
´; LED
START
should light up.