Detcon TP-424C - Manual (Page 14)

Unstable output/Sudden spiking
Unstable power supply, Inadequate grounding, Inadequate RFI protection.
1. Verify Power source.
2. Contact Detcon to optimize shielding and grounding.
3. Add RFI protection accessory.
4. Check area for after gas releases, such as cleaning chemical vapors.
Nuisance Alarms
1. Check condulet for accumulated water and abnormal corrosion.
2. If Nuisance alarms happening at night suspect condensation in condulet .
3. Add/Replace Detcon Condensation Prevention Packet P/N
960-202200-000
Transmitter not responding
1. Verify condulet has no accumulated water or abnormal corrosion.
2. Verify required DC power is applied to correct terminals.
3. Swap with a known-good transmitter to determine if transmitter is faulty.
Bad 4-20 mA output
1. Check that wiring is connected to correct terminal outputs.
2. Swap with a known-good transmitter to determine if transmitter is faulty.
3.13 Spare P arts
600-500000-000 Sensor rain shield
600-610000-000 Sensor splash guard
943-000006-038 Threaded Calibration Adapter
399-800000-000 H2S sensor in stainless steel housing
924-015400-100 TP-424C Plug-in control circuit
500-005065-007 Connector board
960-202200-000 Condensation prevention packet (replace annually).
985-241100-321 In-Line Humidifying Tube
943-020000-000 Span Gas Kit: Includes cal adapter, In-Line Humidifying Tube, 200 ml/m span
gas regulator, and carrying case. Does not include span gas.
942-010112-010 Span gas bottle containing 58 liters 10ppm H2S in air (operating range dependent).
942-010112-020 Span gas bottle containing 58 liters 20ppm H2S in air (operating range dependent).
942-010112-025 Span gas bottle containing 58 liters 25ppm H2S in air (operating range dependent).
942-010112-050 Span gas bottle containing 58 liters 50ppm H2S in air (operating range dependent).
943-090005-502 200 ml/m regulator for span gas bottle
960-398800-000 H2S/MOS DRICAP w/desiccant (10 pack)
Detcon Model TP-424C Hydrogen Sulfide Sensor PG.14
H2S Sensor in SS Housing
Calibration Adapter
Rain Shield
Transmitter Assembly
Base Connector Board
Enclosure
Enclosure Cover
#6 x .125" Nylon Washer (X2)
6-32 X 3/8 Screw (X2)
#6 Star Washer (X2)
#6 Flat Washer (X2)
Condensation
Prevention Packet
(replace annually)