Fike CEREX - Commissioning Procedure; Check-List

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Doc. P/N 8.8517.00.6
Rev. December, 2019
Error description
Cause
Action
No measuring signal
Connection of 4…20 mA line
incorrect
(re) Connect device
No supply voltage over
4…20 mA line
Check current loop
Supply voltage too low
(min. 8 V DC)
Check supply voltage
Error current
<3.6 mA or >21 mA
Connection incorrect
(re) Connect device
Connection of 4…20 mA line
incorrect
(re) Connect device
No supply voltage over
4…20 mA line
Check current loop
Detector defective
Replace detector
Measuring value inaccurate/
incorrect
Offset drift, electronic defect
Return to Fike for recalibration and
response test
Product build-up on the
detector membrane
clean (refer to routine inspection section)
6. DE-COMMISSIONING PROCEDURE / CHECK-LIST
De-commissioning should only be performed by a Fike qualified Service Engineer, who has been assigned to prepare
and complete the de-commissioning of the Explosion Protection System.
Each step in a listed procedure must be adhered to and completion/acceptance of a listed form is mandatory. In the
case of non-compliance, the observed discrepancy must be corrected before completion of the system de-
commissioning.