VEGA VEGASEL 643 - Manual (Page 13)

VEGASEL 643 13
5.3 Failure removal
Failure Removal / Measure
Instrument does not
function, the green
mains control lamp
extinguishes
Check the supply voltage and the mains connection by means of the „Connection
instructions“. When the instrument still does not function, contact our service
department.
Instrument does not
switch correctly
Check the position of the coded keys. The switch points for min. and max. must not
be set to the same values. Correct if necessary the values.
Instrument does not
switch when using the
active input
Check the connected measuring data input
- Check wiring, see „3.3 Wiring plan and extension examples“
- Check voltage or current values on their nominal range, see „1.4 Technical data“.
- The auxiliary level switch is internally provided with an interlock diode. A measuring
instrument connected to terminal 2 and 3 is hence automatically switched into the
circuit of the measuring line (switching in series).
Hence it is possible to check the measuring line. The measuring instrument
indicates the actual current.
5 Diagnosis
5.1 Maintenance
The instrument is maintenancefree.
5.2 Repair
For safety and guarantee reasons repairs on the
instrument must only be carried out by VEGA-staff.
Diagnosis
In case of a defect please return the respective instru-
ment along with a short description of the fault to our
repair department.
Occurring faults, possible reasons and their removals
are stated under „5.3 Failure removal“.
mA
1 2 4 3
Load of the measuring
instrument
max. 15
Ω