Patol Limited
6.
MAINTENANCE
6.1 General
It is recommended that a System Log Book / File is raised at the Commissioning Stage and
that the system configuration and initial settings recorded. These should include:-
Operation configuration and Sensitivity - SIL switch set-up.
Supply voltage.
Subsequently all system events should be recorded in the log.
These should include all maintenance activity, changes to settings, Fault warnings and
Alarm occurrences. (including cause and actions taken ).
An operational regime should be developed that includes both frequent inspection of the
Sensor for undue accumulation of dust, and to confirm air (blower) operation. The regime
may encompass use of the Test facility to check basic operation.
In addition, the system should be subjected to a
periodic service
as defined in the
following.
6.2
Fault Monitoring Functions
A test should be conducted to confirm the correct operation of the fault monitoring circuits :-
Supply Failure - Check as per 4.3.6
6.3 Infra-red
Detection
A heat simulation test should be conducted by moving a “hot” (IR emitting) target into the
view field of the Sensor and checking the consequential Alarm operation.
It is preferable that the “test target” is of sufficient size and temperature to enable
simulation at the plane of the monitored path (conveyor) in order to validate the view field of
the Sensor . Smaller and/or cooler “test targets” may be used closer to the Sensor so as to
at least confirm basic operation of the Sensor.
Fig.7 in Section 2.5 indicates the relationship between the surface area and temperature
required for triggering at the various trip settings.
In hazardous areas it may be necessary to make special arrangements for this testing as
the electrical / hot nature of the test simulation may breach normal site regulations. It may
even be that the test is precluded.
Potential “test targets” are :-
Type 5501 Infra-red Radiator - Test and Commissioning Platen - Patol product.
Type 5502 Infra-red Radiator - Test and Commissioning Wand - Patol product.
100W Lamp Bulb - (The Sensor responds to the glass temperature - not the visible light).
Domestic Flat Iron (smoothing iron).
Electrical or Catalytic soldering iron.
Note : Infra-red LED Torches are NOT suitable for testing 5000 Series equipment.
Patol Limited
Rectory Road, Padworth Common, Reading,
Berkshire, United Kingdom. RG7 4JD
Tel: +44 (0) 118 9701701 email : [email protected]
Fax: +44 (0) 118 9701700 Web: www.patol.co.uk
Page 16 of 16
D1198 - Issue 1 - 25 September 2013
Series 5000 - Manual 5610