REV 0, June 2005 Seite 375
Operation Manual SUPREMA
14. Marking and Approvals
14.1 Special Conditions for Secure Use According to EG Type
Test Approval DMT 03 ATEX G 003 X
- Alarm outputs configured as “new Alarm” shall not be used for safety-relevant purposes.
- The operation of the system fail relays, as well as the relays of the modules connected,
must be regularly checked as part of the preventative maintenance (see 7.1).
- Passive remote measuring heads must always be connected to 5-core cable when the
3-core cable length allowed for proper cable control has been exceeded.
- When operating the gas warning System with 4 ... 20 mA interface remote measuring
heads with 3-core cable at MCI modules Mat. No. 10021029 or 10041567, the user must
take into account that short circuits of the measuring head cable are not recognized in all
cases. The proper state of the cable leading to the remote measuring head has to be
checked regularly.
- When switching together with 4 ... 20 mA interface remote measuring heads, the
specification of the 4 ... 20 mA interface as well as the behaviours below 4 mA and above
20 mA have to be taken into account.
- When operating the gas warning system, the user must consider that for most of the
remote measuring heads to be connected the signalisation of special status at the
outputs of measuring values is not different from measuring values which only just lie
below the measurement range beginning. Moreover, not all special status are signalised
at the outputs of measuring values.
- When operating the system with a large number of measure points and relay outputs, the
directions for parameter setting of the relay outputs laid down this operation manual have
to be kept to.
- When in the field use of the D-7010 remote measuring heads environmental
temperatures of above 40 °C cannot be excluded, the alarm levels must not be higher
than 90 % of the setting required according to the safety-relevant limit value.
- If the D-7010 remote measuring head has been set at ambient temperatures below
+10 °C, a new setting has to be carried out when +20 °C are exceeded for a longer
period.
- When the D-7010 remote measuring head has been exposed to concentrations above
the measuring range level, zero and sensitivity have to be checked and readjusted, if
necessary.
- If the D-7010 or D-7100 remote measuring heads are used with the SG 70 splashwater-
proof housing, the following measures must be taken:
- The alarm levels must not exceed 75 % of the setting which is necessary with regard
to the safety-relevant limits.
- Before start-up it must be made sure that, in view of the considerably longer setting
periods, the possible rising speed of the measure gas concentration in the field use
cannot lead to safety-endangering situations.
- Application of span gas via the span gas inlet for calibration and setting must only be
done in calm ambient air.
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