Thyracont VSM77D - 6 Maintenance and Service

50
VSM-de-171005
6 Maintenance and Service
Danger of possibly contaminated parts!
Contaminated parts can cause personal injuries. Inform your-
self regarding possible contamination before you start working.
Be sure to follow the relevant instructions and take care of
necessary protective measures.
The unit requires no maintenance. External dirt and soiling can be removed by a
damp cloth.
Should a defect or damage occur on your VSM, please send the instrument to us
for repair and enclose a decontamination declaration.
The unit is not prepared for customer repair!
Defective sensor heads can be exchanged on-site by calibrat-
ed replacement sensors (spare parts B_VSM77, B_VSM78 or
B_VSM79).
Malfunction of the unit, which is caused by contamination or
wear and tear is not covered by warranty.
Error messages and malfunction
Problem
Possible Cause
Correction
high measurement error contamination, ageing,
extreme temperature,
misadjustment
readjustment,
replace sensor or
send unit for repair
zero adjustment of Pirani not
possible
measurement error exceeds
possible range of
readjustment
Replace sensor or
send unit for repair
0.5V < output signal < 1.0V /
"UR" via RS485
pressure under range
(pressure < 5x10
-9
mbar)
output signal < 0.5V /
"ERROR1" via RS485
Status LED continuously red
defective electronics or
sensor
send unit for repair or
replace sensor
Access code "7" via RS485 Error message / warning see separate documentation
Thyracont Communication
Protocol