M&C TechGroup PAS-500 Operator's manual - Manual (Page 16)

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Gas sampling and gas conditioning technology 10-5.1-ME
16.9.2 MONITOR RELAY
In addition to mechanical temperature protection the heated protective housing is provided with an
electronic monitor relay.
If a fault occurs during operation or if the selected set point temperature is exceeded by 10°C the
monitor relay switches over the heating to this temperature in emergency mode. The alarm symbol is
flashing as warning.
Fault rectification after the monitor relay may been activated:
Check the controller for error messages (see chapter 15 „Error messages“) and where appropriate
contact customer service.
Example:
With a set point
temperature of 150°C, if
a fault occurs in the
power unit (faulty triac)
the oven continues to
operate in emergency
operation at approx.
160°C.
Figure 7 Function of the monitor relay
17
STARTING
During operation and maintenance works, the following prescriptions have to be observed:
- the Operating Manual
- the standard EN 60519-
1 „Safety in Electrical Heating Facilities“ Part 1: General Requirements
- the standard EN 60519- 2 „Safety in Electrical Heating Facilities“ Part 2: Special Instructions for
Facilities with Resistance Heating
- the standard VDE 0100 or similar regional prescriptions
- eventually applicable standards and prescriptions (i.e. Empl
oyer’s liability insurance association in
Germany).
When the heated protective housing is started up for the first time, it should be supervised
continuously until steady conditions have been reached. Severe vibrations during transport may cause
movement of the temperature probe in its holder inside the chamber. Note therefore that before the
first start-up the temperature probe should be checked for its correct position and, if necessary,
carefully aligned in its mounting (see figure 8).
emergency mod