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Teledyne Detcon TP-624D Instruction Manual

Hydrogen sulfide sensor
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Instruction Manual
Model TP-624D
TP-624D Hydrogen Sulfide Sensor
This manual covers the following ranges:
0-20ppm, 0-50ppm, and 0-100ppm
TELEDYNE DETCON, Inc.
14880 Skinner Road, Cypress, Texas 77429
www.teledynegasandflamedetection.com
November 17, 2020 • Document #3532 • Revision 0.9
PGM
1
MODEL
TP-624D
MicroSafe
H2S Gas Sensor
TM
ALM ALM
FLT
1
2
CAL
PGM
2
Phone 713.559.9200
Use and Disclosure of Data
Information contained herein is classified as
EAR99 under the U.S. Export Administration
Regulations. Export, reexport or diversion
contrary to U.S. law is prohibited.

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  • Page 1 Instruction Manual Model TP-624D MODEL TP-624D MicroSafe H2S Gas Sensor ALM ALM TP-624D Hydrogen Sulfide Sensor This manual covers the following ranges: 0-20ppm, 0-50ppm, and 0-100ppm TELEDYNE DETCON, Inc. 14880 Skinner Road, Cypress, Texas 77429 Phone 713.559.9200 www.teledynegasandflamedetection.com Use and Disclosure of Data Information contained herein is classified as EAR99 under the U.S.
  • Page 2 EAR99 Technology Subject to Restrictions Contained on the Cover Page This page left intentionally blank TP-624D Instruction Manual...

  • Page 3: Table Of Contents

    RS-485 Modbus Protocol........................28 Service and Maintenance ..........................30 Troubleshooting Guide ..........................32 Customer Support and Service Policy ......................35 TP-624D Sensor Warranty .........................36 Appendix ..............................37 Specifications ............................ 37 Spare Parts, Sensor Accessories, Calibration Equipment ..............39 Revision Log ............................. 40 TP-624D Instruction Manual...
  • Page 4 Figure 8 Typical Installation ..........................9 Figure 9 Sensor Connector PCB......................... 11 Figure 10 Magnetic Programming Tool ......................13 Figure 11 Magnetic Programming Switches ...................... 13 Figure 12 TP-624D Software Flowchart ......................15 Figure 13 Replaceable H S Sensor ........................32 List of Tables Table 1 Cross Interference Gases .........................

  • Page 5: Introduction

    EAR99 Technology Subject to Restrictions Contained on the Cover Page 1. Introduction 1.1 Description Teledyne Detcon Model TP-624D hydrogen sulfide sensors are non-intrusive “Smart” sensors designed to detect and monitor H S in air. Ranges of detection are 0-20ppm, 0-50ppm, and 0-100ppm. The sensor features an LED display of current reading, fault, and calibration status.

  • Page 6: Principle Of Operation

    The sensor response is reversible and results in continuous monitoring of ambient air conditions. 1.2 Modular Mechanical Design The Model TP-624D Sensor Assembly is completely modular and is made up of four parts: 1) TP-624D Plug-in Transmitter 2) Field Replaceable H...

  • Page 7: Figure 5 Base Connector Board

    PCB, and unthreading the sensor from the junction box. The Teledyne Detcon solid state H S sensor has an infinite shelf life and is supported by a 10 year, industry-leading warranty.

  • Page 8: Relay Outputs

    1.3 Relay Outputs The TP-624D includes three 5A Form C relay outputs. Two of these relays are dedicated to alarm outputs, and the third is used to indicate when the sensor is in fault. The common and normally closed contacts on the alarm relays are connected when the gas concentration is below the alarm threshold.

  • Page 9: Installation

    NOTE: It is mandatory to bump test or span calibrate the detector following field situations where exposures to IP 66 level ingresses from dust or water have been presented. TP-624D Instruction Manual Rev. 0.9 Page 5 of 41...

  • Page 10: Sensor Placement

    Painting sensor assemblies is prohibited. Although the sensor is designed to be RFI resistant, it should not be mounted in close proximity to high-powered radio transmitters or similar RFI generating equipment. TP-624D Instruction Manual Rev. 0.9 Page 6 of 41...

  • Page 11: Sensor Contaminants And Interference

    Ethanol 500 = 5 NOTE: The Teledyne Detcon MOS Sensor Cell can be damaged to the point of non-functioning if the unit is left off power and in the presence normal air levels of moisture for periods exceeding 8 hours.

  • Page 12: Mounting Installation

    The TP-624D should be vertically oriented so that the sensor points straight downward. The explosion-proof enclosure or junction box would then typically be mounted on a wall or pole (See Figure 7). Teledyne Detcon provides a selection of standard junction boxes in both Aluminum and Stainless Steel.

  • Page 13: Electrical Installation

    18" of the enclosure. Crouse Hinds type EYS2, EYD2 or equivalent are suitable for this purpose. NOTE: The Teledyne Detcon Warranty does not cover water damage resulting from water leaking into the enclosure.

  • Page 14: Field Wiring

    EAR99 Technology Subject to Restrictions Contained on the Cover Page NOTE: Any unused ports should be blocked with suitable ¾” male NPT plugs. Teledyne Detcon Supplies one ¾” NPT male plug with each J-box enclosure. If connections are other than ¾”...

  • Page 15: Initial Start Up

    12-28VDC (24VDC typical) and observe the following normal conditions: a) TP-624D display reads “0”, and no fault messages are flashing. b) A temporary upscale reading may occur as the sensor heats up. This upscale reading will decrease to “0”...

  • Page 16: Material Requirements

    After a warm up period of 1 hour, the sensor should be checked to verify sensitivity to H S gas. Material Requirements -Teledyne Detcon PN 600-610000-000 Splash Guard with integral Cal Port -OR- -Teledyne Detcon PN 943-000006-038 Threaded Calibration Adapter -Teledyne Detcon PN 942-010112-025 Span Gas; 25ppm H...

  • Page 17: Operation

    3. Operation 3.1 Programming Magnet Operating Instructions The Operator Interface of the TP-624D gas sensors is accomplished via two internal magnetic switches located above and below the LED display (Figure 11). The two switches, labeled “PGM1” and “PGM2”, allow for complete calibration and configuration, thereby eliminating the need for area de-classification or the use of hot permits.

  • Page 18: Operator Interface

    Alarm 2 Energized Fault Latching Fault Energized Set AutoSpan Level Set Range Set Heater Power Signal Output Check Restore Default Settings Set Serial ID Alarm 1 Settings Alarm 2 Settings Fault Settings TP-624D Instruction Manual Rev. 0.9 Page 14 of 41...

  • Page 19: Figure 12 Tp-624D Software Flowchart

    (10) - 10 second hold from ">" prompt PGM1/2 (3) PGM1/2 (3) Auto Time-out - 5 seconds inc - Increase dec - Decrease #, ##, ### - numeric values Figure 12 TP-624D Software Flowchart TP-624D Instruction Manual Rev. 0.9 Page 15 of 41...

  • Page 20: Normal Operation

    NOTE 4: Span gas bottles contain 0% humidity and this ultra-low humidity condition will cause inaccurate readings when used to calibrate a sensor. To prevent this error, Teledyne Detcon prescribes the use of a 24” flexible In-Line Humidifying Tube, which adds the relative humidity to the span gas.
  • Page 21 “Fault Detected” message will be displayed alternately with the sensor’s current reading. The 4-20mA output will be taken to 0mA. The “Range Fault” bit in Modbus register 40005 will be set. TP-624D Instruction Manual Rev. 0.9 Page 17 of 41...

  • Page 22: Program Mode

    4 second hold period. The sensor will enter Program Mode and the display will display the first menu item “View Sensor Status”. To advance to the next menu item, hold the magnet over PGM1 or PGM2 TP-624D Instruction Manual Rev. 0.9...

  • Page 23: View Sensor Status

    3-4 seconds (until the display starts to scroll “Status Is”). The display will scroll the complete list of sensor status parameters sequentially: Sensor Model Type The menu item appears as: “TP-624D” Current Software Version The menu item appears as: “V X.XXZ”...
  • Page 24 The menu item appears as: “Alarm 2 Latching or Non-Latching” Alarm 2 Energized The menu item appears as: “Alarm 2 Energized or Non-Energized” Fault Latching The menu item appears as: “Fault Latching or Non-Latching” TP-624D Instruction Manual Rev. 0.9 Page 20 of 41...

  • Page 25: Set Autospan Level

    Set Heater Power is used to set each H S sensor to the optimum operating temperature. This function is performed during factory calibration of each TP-624D sensor assembly, and is not necessary during installation. However, it is necessary to perform in the field if the plug-in H S sensor is replaced, mounted remotely from the Transmitter Module, or if the Restore Factory Defaults function has been executed.

  • Page 26: Signal Output Check

    Move to another menu item by executing a momentary hold, or, return to Normal Operation via automatic timeout of about 15 seconds. 3.5.6 Restore Factory Defaults TP-624D Instruction Manual Rev. 0.9 Page 22 of 41...

  • Page 27: Set Serial Id

    NOTE: The default settings on the TP-624D are not restored until power is cycled on the sensor. Following the execution of “Restore Defaults” and a power cycle of the sensor, the TP-624D will revert to its factory default settings. The default settings are: NOTE: The following must be performed in order before the sensor can be placed back into operation.

  • Page 28: Alarm 1 And 2 Settings

    This is the most common mode of operation for the TP-624D. The alarm relays can also be activated in descending mode. In this mode, the alarm relays will activate when the concentration is below the alarm threshold.

  • Page 29: Fault Settings

    3.5.9 Fault Settings The TP-624D contains a single Form C fault relay output. This relay can be configured to change state when the sensor experiences a fault condition. This relay can be configured to operate in either energized or non-energized mode.

  • Page 30: Fault Diagnostic/Failsafe Features

    3.6.2 Fault Diagnostic/Failsafe Features Fail-Safe/Fault Supervision Model TP-624D MicroSafe™ sensors are designed for Fail-Safe operation. If any of the diagnostic faults listed below are active, the sensor display will scroll the message “Fault Detected” every 60 seconds during normal operation. At any time during “Fault Detected” mode, holding the programming magnet over PGM1 or PGM2 for 1 second will display the active fault(s).
  • Page 31 Fault” will cause the “Fault Detected” message to scroll once a minute on the sensor display. If an AutoSpan Reminder Fault occurs, the 4-20mA signal remains operational, but the “Sensor Fault” bit will be set. TP-624D Instruction Manual Rev. 0.9...

  • Page 32: Rs-485 Modbus Tm Protocol

    A master controller up to 4000 feet away can poll up to 256 different TP-624D sensors. This number may not be realistic in harsh environments where noise and/or wiring conditions would make it impractical to place so many devices on the same pair of wires. If a multi-point system is being utilized, each sensor should be set for a different address.

  • Page 33: Table 4 Notation Text String Description

    0x20 – The units field is terminated with an ASCII space (0x20) Gas Type – This field contains the gas type of the cell (typically “H2S _ _ _”) 0x00 – The notation string is terminated with an ASCII null character TP-624D Instruction Manual Rev. 0.9 Page 29 of 41...

  • Page 34: Service And Maintenance

    J-Box from condensing and accumulating moisture due to day-night humidity changes. This packet provides a critical function and should be replaced annually. Teledyne Detcon’s PN is 960-202200-000. NOTE: A desiccant cap with a desiccant packet is attached to the sensor cell housing to avoid damage during storage and shipping.
  • Page 35 Re-connect the output wiring from the power, 4-20mA, RS-485 and relay connector PCB terminals. g) Reconnect the black, white, blue, and yellow wires from the H S Sensor to the connector PCB. h) Reinstall the Transmitter Module, and the junction box cover. TP-624D Instruction Manual Rev. 0.9 Page 31 of 41...

  • Page 36: Troubleshooting Guide

    S pull tube or other means (check MFG date on cal gas cylinder). Check for obstructions through stainless steel flame arrestor (including being wet, blocked, or corroded). Replace the H S sensor. TP-624D Instruction Manual Rev. 0.9 Page 32 of 41...

  • Page 37: Nuisance Alarms

    Nuisance Alarms Check condulet for accumulated water and abnormal corrosion on terminal blocks. If nuisance alarms are happening at night, suspect condensation in condulet. Add or replace Teledyne Detcon’s Condensation Prevention Packet P/N 960-202200-000. Investigate the presence of other target gases that are causing cross-interference erroneous readings.
  • Page 38 Perform a “Signal Output Check” sequence via Section 3.5.5 and verify 4-20mA output with Current Meter. Swap with a known-good Transmitter Module to determine if the Transmitter Module’s 4-20mA output circuit is faulty. TP-624D Instruction Manual Rev. 0.9 Page 34 of 41...

  • Page 39: Customer Support And Service Policy

    Including all implied warranties of merchantability and fitness and the express warranties stated herein are in lieu of all obligations or liabilities on the part of Teledyne Detcon Inc. for damages including, but not limited to, consequential damages arising out of, or in connection with, the performance of the product.

  • Page 40: Tp-624D Sensor Warranty

    * Shipping point is FOB the Teledyne Detcon factory. * Net payment is due within 30 days of invoice. * Teledyne Detcon, Inc. reserves the right to refund the original purchase price in lieu of sensor replacement. Transmitter Module Warranty Teledyne Detcon Inc.

  • Page 41: Appendix

    CSA C22.2 No. 142-M1987 UL No. 916 UL No.1203 EN60079-0 (2006) EN60079-1 (2007) Warranty: Electronics – 2 years Sensor – 10 year conditional Environmental Specifications Operating Temperature: -40°C to +75°C (-40°F to +167°F) TP-624D Instruction Manual Rev. 0.9 Page 37 of 41...
  • Page 42 Maximum distance is 13,300 feet with 14 AWG Serial Output – 2-wire twisted-pair shielded cable specified for RS-485 use. Maximum distance is 4,000 feet to last sensor I/O Protection: Over-voltage, miswiring, EMI/RFI Immunity TP-624D Instruction Manual Rev. 0.9 Page 38 of 41...

  • Page 43: Spare Parts, Sensor Accessories, Calibration Equipment

    EAR99 Technology Subject to Restrictions Contained on the Cover Page 9.2 Spare Parts, Sensor Accessories, Calibration Equipment Part Number Spare Parts 926-0154D0-100 TP-624D Plug-in Transmitter Module 399-800000-000 Replacement H S sensor 500-005231-000 Standard Connector PCB 960-202200-000 Condensation Prevention Packet (for J-Box replace annually)

  • Page 44: Revision Log

    Add CAUTION NOTE to bump/calibrate after IP66 events and ISA 92.00.01-2010 Performance Test Update 12/06/17 Updated Electrical Classification Approval Temperatures 06/05/18 Updated Conduit Seal in Section 2.5 11/17/20 Updated Company Name and Address TP-624D Instruction Manual Rev. 0.9 Page 40 of 41...
  • Page 45 EAR99 Technology Subject to Restrictions Contained on the Cover Page This page left intentionally blank Shipping Address: 14880 Skinner Road, Cypress, Texas 77429 Phone: 713.559.9200 http://www.teledynegasandflamedetection.com detcon-sales@teledyne.com • TP-624D Instruction Manual Rev. 0.9 Page 41 of 41...

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