Det-Tronics UD10 FlexVu Universal Display SAFETY MANUAL - Manual (Page 5)

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Response proof Test Sequence
1. Inhibit alarm and fault response at the control
device.
2. Apply stimulation to the attached device that is
sufficient to trip both the auxiliary and high alarm
relays (the auxiliary and high alarm relays must be
normally configured to trip at the same input 4-20
mA level).
3. Verify correct change of state at the control device
for both alarm relay outputs and the 4-20 mA output.
Criteria for the 4-20 mA inspection pass of a gas
detector is a response signal within ±3% of applied
gas concentration (generally, a 50% full scale test
concentration is applied).
4. Optional (the display is not part of the UD10 safety
function): Verify that the correct signal output is
displayed on the UD10 faceplate.
5. Remove the test gas or other stimulation method
and ensure that the unit returns to normal operation.
6. Induce a fault to the UD10; suggested fault induction
methods are listed below:
– Remove input power to the UD10.
– Lower input supply voltage below 16 Vdc.
– Remove input 4-20 mA source (i.e. remove
connected gas sensor or other device).
7. Verify correct change of state to fault relay and 4-20
mA outputs at the control device.
8. Optional (the display is not part of the UD10 safety
function): Verify that the correct fault signal output is
displayed on the UD10 faceplate.
9. Remove the fault induction source and ensure that
the unit returns to normal operation.
10. Re-activate alarm and fault response at the control
device.
If response test is not within acceptable limits or fails
for any reason, a Full Calibration procedure must be
performed and the Proof Test re-performed. The Full
Calibration procedure for gas detectors is listed below.
For calibration of other devices, refer to the manual for
the specific device.
Full Calibration
Tools Required: Compressed Calibration Gas Kit
provided by Det-Tronics
Magnet or HART Communicator
Full Calibration shall be conducted when required as
documented in the Calibration section of the UD10
instruction manual. It is permissible to conduct the
Full Calibration using either the onboard magnetic
calibration switch or using an approved HART handheld
field communicator. In all cases the model UD10 and
attached gas detector should be allowed to warm up
for one hour minimum before conducting calibration.
Completion of the Response Proof Test must be
recorded and documented in the SIS logbook.
WARNING
Any external alarm equipment, systems or signaling
devices that were disabled must be re-activated at
the conclusion of proof testing activities.
FAULT/FAILURE ACTION pLAN
In the event of an unsuccessful Response Proof test
after a Calibration has been performed, the standard
Troubleshooting and Device Repair and Return
procedures as listed in the UD10 instruction manual
must be followed. Any failure to successfully complete
the Response Proof Test must be recorded and
documented in the SIS logbook.
pRODUCT REpAIR
The UD10 is not field repairable, and any internal
device repairs must be conducted at the factory.
No firmware changes are permitted or authorized.
All failures detected by the device diagnostics or
by the Proof Tests that cannot be resolved through
the troubleshooting and maintenance procedures
described in the instruction manual must be reported
to the manufacturer.
OpERATING, ENvIRONMENTAL, AND
pERFORMANCE SpECIFICATIONS
The Safety-Certified UD10 product versions fully
comply with, and must be operated in accordance
with the functional, environmental, and performance
specifications provided in the UD10 instruction manual.
A 24 hour mean time to repair should be assumed for
safety availability calculations.