VEGA VEGASTAB 692 MD - Manual (Page 14)

14 VEGASTAB 692 MD
5 Diagnosis
5.1 Maintenance
The instrument is maintenance-free.
5.2 Fault signal
If the green power LED in the front plate does
not light, either supply voltage is not available
or VEGASTAB 692 MD is defective.
5.3 Failure diagnostics
- If VVO outputs the message "no connection
possible", there is no communication be-
tween the RS-232 interface of the PC and
VEGACONNECT 3. Possible reasons can
be: wrong connection cable or wrong serial
interface used (e.g. COM 1 set in VVO and
plugged into COM 2).
- If in VVO the message "no instrument avail-
able on VEGACONNECT" appears, then
there is no sensor connected, the polarity
is reversed or the connected sensors are
not set to multidrop and have therefore all
the same address 0 (see chapter "4
Setup").
- If individual sensors are not available in
VVO, they have the same multidrop ad-
dress (see chapter "4 Setup").
- On all sensors, a supply voltage between
16 and 25 V must be available. If this is not
the case, either the cable is too long or the
cross-section too small or there is an inter-
ruption or short-circuit.
- If you have connected a modem, the mo-
dem connection cable for VEGACONNECT
3 (MODEM.KX) must be used. If further
problems occur, you can find additional
helpful information in the operating instruc-
tions manual Remote parameter adjust-
Remote parameter adjust- Remote parameter adjust- Remote parameter adjust- Remote parameter adjust-
ment. ment. ment. ment. ment.
Diagnosis
5.4 Repair
For safety and warranty reasons, any internal
work on the instruments, apart from that
required in normal installation and connection,
must be carried out only by VEGA personnel.
In case of defect, please return the affected
instrument with a short description of the fault
to our repair department.