Proof Test; Calibration; Az20 Calibration; Az30 Calibration - ABB Endura AZ20 Manual

12 E N D U R A A Z 2 0 & A Z 3 0 | OX YG E N A N A LY Z E R | S I/A Z 2 0/A Z 3 0 - E N R E V. A

8 Proof test

In accordance with IEC61508, the safety function of the
measuring device must be checked at appropriate time
intervals. The operator must determine the checking interval
and take this into account when determining the probability of
failure of the device.
The test must be carried out in such a way that it verifies
correct operation of the device.
The MTBF (unrevealed) figures assume that tests are conducted
once per year minimum.
Testing the device can be performed in the following steps:

Calibration

AZ20 calibration

Refer to section 6 Calibration of the User Guide:
IM/AZ20E-EN.

AZ30 calibration

Refer to section 7 of the Programming Guide:
COI/AZ30E-EN.

Inspection

Visual Inspection should take place by ABB personnel or by
personnel trained by ABB and is only necessary in the event of
alarms or failed calibration.
On-site inspection includes:
• Manual calibration
• Visual inspection
• Component resistance checks

9 Repair

For testing and replacing key components, instructions can be
found in the Maintenance Guide:
IM/AZ20M-EN.
To ensure the safety related function, repairs must be
performed by ABB, or by suitably trained personnel.
Replacing modular components with ABB spare parts is
permitted if personnel have been trained by ABB for this
purpose.
The "Declaration of contamination and cleaning" must be
enclosed when returning the defective device. Refer to
instruction manual or contact ABB for further details.