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Det-Tronics UD10 FlexVu Universal Display SAFETY MANUAL User Manual

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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.