Detcon TP-700 SIL 2 Safety Manual - Manual (Page 4)

The TP-700 operating power distribution system should be designed and installed so the terminal voltage does not drop
below 11 VDC when measured at any specific location. The maximum current limit must be less than 0.5 amperes. The
over-voltage protection on the power distribution system must be set for 30 VDC.
10 START-UP AND COMMISSIONING
The Safety Certified TP-700 gas detector can be commissioned by any qualified person with knowledge of gas detection
instruments and the configuration device being used. Refer to the Start-Up and Commissioning sections provided in the
TP-700 instruction manual.
11 OPERATION, MAINTENANCE, INSPECTION AND PROOF TESTING
All normal installation, start-up, and full field calibration recommendations as documented in the TP-700 instruction
manual are applicable to the Safety Certified TP-700 gas detector.
Safety – Certified TP-700 gas detectors require additional Proof Testing to be performed in all cases.
Personnel performing Proof Test procedures shall be competent to perform the task. All proof test results must be
recorded and analyzed. Any corrective actions taken must be documented in the event that an error is found in the safety
functionality. The proof tests must be performed at a frequency as shown in Table 1.
Table 1: Frequency for Performing Proof Tests
TP-700 Proof Test Name Commissioning Frequency per year
Visual Field Inspection Proof Test Yes 4 (Quarterly)
Gas Response Proof Test Yes 4 (Quarterly)
Output Response Proof Test Yes 1
Warning:
Failure to perform the specified testing and inspection may lower or void the SIL rating for the product or
system.
12 VISUAL FIELD INSPECTION PROOF TEST
Tools Required: Programming magnet
Visual inspection of all Safety-Certified TP-700 Gas Detectors shall be conducted quarterly to confirm that no external
blockage of gas/vapor path into the sensing chamber exists, ex. debris, trash, snow, mud, external equipment, etc.
Corrective action shall include removal of such impediments should they exist. All gas detectors must be inspected to
ensure that they are capable of providing expected performance and protection. The Model TP-700 provides a scrolling
LED display that indicates fault messages when operational parameters are abnormal. A momentary magnetic swipe
across either programming magnet will visually indicate any scrolling Fault Messages should any be present.
Completion of Visual Field Inspection Proof test will be recorded and documented in the SIS logbook.
13 GAS RESPONSE PROOF TEST
Tools Required: Span Calibration Gas Cylinder (50 ppm H2S/balance Air or mid-scale of range used)
Calibration Kit provided by Detcon