INSTRUCTION MANUAL Detcon Model TP-524D PGM MODEL 1 HOUSTON, TEXAS TP-524D MicroSafeTM H2S Gas Sensor FLT ALM ALM 1 2 CAL PGM 2 TP-524D Hydrogen Sulfide Sensor This manual covers the following ranges: 0-20ppm, 0-50ppm, and 0-100ppm DETCON, Inc. 4055 Technology Forest Blvd, Suite 100, The Woodlands, Texas 77381 Ph.281.367.4100 / Fax 281.298.2868 www.detcon.com March 10, 2014 • Document #3269 • Revision 0.
Model TP-524D This page left intentionally blank Model TP-524D ii
Model TP-524D Table of Contents 1. 2. 3. 4. 5. 6. 7. 8. Introduction ..................................................................................................................................................1 1.1 Description.......................................................................................................................................... 1 1.2 Modular Mechanical Design.........................................................................................................
Model TP-524D Table of Figures Figure 1 Sensor Assembly Front View ................................................................................................................ 1 Figure 2 Circuit Functional Block Diagram......................................................................................................... 2 Figure 3 Transmitter Module ...............................................................................................................................
Model TP-524D 1. Introduction 1.1 Description Detcon Model TP-524D hydrogen sulfide sensors are non-intrusive “Smart” sensors designed to detect and monitor H2S 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. The Sensor is equipped with a standard analog 420mA output.
Model TP-524D Principle of Operation Method of detection is by diffusion/adsorption. Air and H2S diffuse through a sintered stainless steel filter (flame arrestor) and contact the heated surface of the metal oxide sensor film. As hydrogen sulfide gas molecules react with oxygen ions on the film, there is a decrease in electrical resistance proportional to the gas concentration.
Model TP-524D Field Replaceable Sensor The Detcon solid-state H2S gas sensor is a field proven, replaceable type sensor. It can be accessed and replaced in the field by removing the wiring from the connector PCB, and unthreading the Sensor from the junction box. The Detcon solid state H2S sensor has an infinite shelf life and is supported by a 10 year, industry-leading warranty.
Model TP-524D 2. Installation 2.1 ATEX Operational Guidelines for Safe Use 1. Install sensor only in areas with classifications matching with those described on the approval label. Follow all warnings listed on the label. DETCON, THE WOODLANDS, TEXAS, USA MODEL TP-524D RATED: 12-28VDC, 100 mA @ 24VDC DETCON, THE WOODLANDS, TEXAS, USA MODEL TP-524D RATED: 12-28VDC, 100 mA @ 24VDC detcon, inc. detcon, inc.
Model TP-524D areas. For gases lighter than air, sensor placement should be 4-8 feet above grade in open areas or in pitched areas of enclosed spaces. Note: H2S is heavier than air. Leak Sources The most probable leak sources within an industrial process include flanges, valves, and tubing connections of the sealed type where seals may either fail or wear. Other leak sources are best determined by facility engineers with experience in similar processes.
Model TP-524D Halide Compounds containing Chlorine, Chlorine Dioxide, Fluorine, HF, HCl, and Bromine Caustic and Acid liquids and concentrated vapors Heavy metals such as tetraethyl lead Heavy and complex VOC gasses The presence of such contaminants in an area does not preclude the use of this H2S sensor technology, although it is likely that the sensor lifetime will be shorter as a result.
Model TP-524D 6.125" 5.5" PGM MODEL NPT Ports 4.6" TP-524D MicroSafeTM H2S Gas Sensor 6.45" 4 1 HOUSTON, TEXAS FLT 3 5.25" ALM ALM 1 2 CAL PGM 2 1 4" Wall (or other mounting surface) 8-32 tapped ground point mounting holes H2S Sensor 2.1" Splash Guard 2" Figure 7 Typical Outline and Mounting Dimensions 2.5 Electrical Installation The Sensor Assembly should be installed in accordance with local electrical codes.
Model TP-524D Conduit "T" EYS Seal Fitting PGM MODEL 1 HOUSTON, TEXAS TP-524D MicroSafeTM H2S Gas Sensor Drain FLT ALM ALM 1 2 CAL PGM 2 Figure 8 Typical Installation NOTE: Any unused ports should be blocked with suitable ¾” male NPT plugs. Detcon supplies one ¾” NPT male plug with each J-box enclosure. If connections are other than ¾” NPT, use an appropriate male plug of like construction material. 2.
Model TP-524D NOTE 3: The supply of power should be from an isolated source with over-current protection as stipulated in table. NOTE 4: A 250 ohm load resistor is needed on the 4-20 mA line when it is not being used. Terminal Connections CAUTION: Do not apply System power to the sensor until all wiring is properly terminated. Refer to Section 2.
Model TP-524D NOTE: A desiccant cap with a desiccant packet is attached to the sensor cell housing to avoid damage during storage and shipping. This prevents water from contacting the sensor film, and as a result helps to retain the stability of the factory span calibration. NOTE: Store the desiccant caps with the desiccant packets in a sealed container (i.e. zip-lock bag) for future use.
Model TP-524D 3. Operation 3.1 Programming Magnet Operating Instructions The Operator Interface of the Model 700 Series 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 declassification or the use of hot permits.
Model TP-524D 3.2 Operator Interface The operating interface is menu-driven via the two magnetic program switches located under the target marks of the sensor housing. The two switches are referred to as “PGM1” and “PGM2”. The menu list consists of three major items that include sub-menus as indicated below. (Refer to the complete Software Flow Chart.
Model TP-524D Software Flowchart Normal Operation PGM1 (3) PGM2 (3) PGM1 (3) PGM2 (3) Exit Calibration Mode (Auto Span) View Sensor Status Auto Time-Out PGM1/2 (M) PGM1/2 (3) Set AutoSpan Level Set Range AutoTime-out PGM1/2 (M) PGM1/2 (3) Auto Time-Out PGM1/2 (M) PGM1/2 (3) Set Heater Power Auto Time-Out PGM1/2 (M) PGM1/2 (3) Model Type Version X.
Model TP-524D 3.3 Normal Operation In normal operation, the display continuously shows the current sensor reading, which will normally appear as “0”. Once every minute, the LED display will flash the sensor’s units of measure and the gas type (i.e. ppm H2S). If the sensor is actively experiencing any diagnostic faults, a “Fault Detected” message will scroll across the display on the display once every minute instead of the units of measure and the gas type.
Model TP-524D concentration is 10ppm for the 0-20ppm range and 25ppm for the 0-50ppm and 0-100ppm ranges. If a span gas containing the recommended concentration is not available, other concentrations may be used as long as they fall between 10% and 50% of selected full-scale range. However, any alternate span gas concentration value must be programmed into the sensor via the “Set AutoSpan Level” menu before proceeding with AutoSpan calibration.
Model TP-524D NOTE 2: If the sensor fails the stability criteria, a “Stability Fault” will be declared and a “Fault Detected” message will be displayed alternately with the sensor’s current reading. The 4-20mA output will be taken to 0mA. NOTE 3: If the sensor fails the clearing time criteria, a “Clearing Fault” will be declared and a “Fault Detected” message will be displayed alternately with the sensor’s current reading. The 4-20mA output will be taken to 0mA.
Model TP-524D View Sensor Status displays all current configuration and operational parameters including: sensor type, software version number, detection range, AutoSpan level, and Days since last AutoSpan, estimated remaining sensor life, heater power, heater voltage, raw resistance, mA output, input voltage, and sensor ambient temperature.
Model TP-524D Alarm 1 Level The menu item appears as: “Alarm 1 Level XX” Alarm 1 Ascending The menu item appears as: “Alarm 1 Ascending or Descending” Alarm 1 Latching The menu item appears as: “Alarm 1 Latching or Non-Latching” Alarm 2 Level The menu item appears as: “Alarm 2 Level XX” Alarm 2 Ascending The menu item appears as: “Alarm 2 Ascending or Descending” Alarm 2 Latching The menu item appears as: “Alarm 2 Latching or Non-Latching” Fault Latching The menu item appears as: “Fault Latching or Non-Lat
Model TP-524D Set Range is used to change full-scale ranges. This is selectable between 0-20, 0-50, and 0-100ppm. The current range can be viewed in View Sensor Status using instruction given in Section 3.5.1 View Sensor Status. The menu item appears as: “Set Range”. From the “Set Range” text scroll, hold the programming magnet over PGM1 or PGM2 until the “” prompt appears and continue to hold the magnet in place for an additional 3-4 seconds (until the display starts to scroll “Set Range”).
Model TP-524D 3.5.5 Signal Output Check Signal Output Check provides a simulated 4-20mA output. This simulation allows the user to conveniently perform a functional system check of their entire safety system. This signal output simulation also aids the user in performing troubleshooting of signal wiring problems. The menu item appears as: “Signal Output Check”.
Model TP-524D Heater Power: Heater Power settings are lost and “Set Heater Power” (3.5.4) must be performed before “AutoSpan”. AutoSpan: AutoSpan Settings are lost and a successful “AutoSpan” must be performed before placing the Sensor into operation (3.4). 3.5.7 Alarm 1 and 2 Settings The TP-524D has the ability to set alarm levels that are displayed on the front of the sensor via the LED’s ALM 1 and ALM 2. These alarm LEDs can be set as latching or non-latching.
Model TP-524D indicates the relay is latching. Swipe the magnet momentarily over PGM2 or PGM1 until the correct value is displayed. Hold the magnet over PGM1 or PGM2 for 3 seconds to accept the new value. Hold the magnet over PGM1 or PGM2 for 3 seconds to accept the new value (until the display starts to scroll “Saved”).
Model TP-524D Range Fault – AutoSpan If the sensor fails the minimum signal change criteria during AutoSpan sequence (Section 3.4), the “Range Fault” will be declared. A “Range Fault” will cause a “Fault Detected” message to scroll once a minute on the sensor display and drop the 4-20mA output to 0mA. The sensor should be considered “Out-of-Service” until a successful AutoSpan calibration is performed.
Model TP-524D minute on the sensor display. If an Input Voltage Fault occurs, the 4-20mA signal will be set at 0mA until the fault condition is resolved. Temperature Fault If the detector is reporting currently an ambient temperature that is outside of the –40ºC to +75ºC range, a “Temperature Fault” is declared. A “Temperature Fault” will cause the “Fault Detected” message to scroll once a minute on the sensor display. If a Temperature Fault occurs, the 4-20mA signal remains operational.
Model TP-524D 4. Service and Maintenance Calibration Frequency In most applications, monthly to quarterly span calibration intervals will assure reliable detection. However, industrial environments differ. Upon initial installation and commissioning, close frequency tests should be performed, weekly to monthly. Test results should be recorded and reviewed to determine a suitable calibration interval. If, after 180 days, an AutoSpan Calibration is not performed, the sensor will generate an AutoSpan Fault.
Model TP-524D Replacement of Transmitter Module a) Remove the junction box cover and remove the Transmitter Module from the Connector PCB. NOTE: It is necessary to remove power to the Junction Box while changing the Transmitter Module in order to maintain area classification. b) Plug the new Transmitter Module into the connector PCB, and reinstall the junction box cover.
Model TP-524D 5. Troubleshooting Guide Refer to the list of Failsafe Diagnostic features listed in Section 3.6.2 for additional reference in troubleshooting activities. Listed below are some typical trouble conditions and their probable cause and resolution path. Figure 13 Replaceable H2S Sensor Open Heater Probable Cause: H2S sensor has failed Remove H2S sensor wires from the Connector PCB and verify resistance between the black and white wires using an ohmmeter.
Model TP-524D Stability Fault Probable Causes: Failed Sensor, empty or close to empty Cal Gas Cylinder, problems with cal gas and delivery, or no Humidifying Tube used, failure to properly desiccant packet the sensor cell during extended power-off periods. Check Heater Power Setting (should be 240 ± 5mW at 25ºC ambient temperature). Verify use of span gas Humidifying Tube. Check validity of span gas using H2S pull tube or other means (check MFG date on cal gas cylinder).
Model TP-524D Restore Factory Defaults - This will clear the processor’s memory and may correct problem. Remember to reenter all customer settings for range and cal gas level after Restore Factory Defaults. If problem persists, replace the Plug-in Transmitter Module. Unreadable Display If due to excessive sunlight, install a sunshade to reduce glare. Nothing Displayed – Transmitter not Responding Verify condulet has no accumulated water or abnormal corrosion.
Model TP-524D 6. Customer Support and Service Policy Detcon Headquarters Shipping Address: 4055 Technology Forest Blvd, Suite 100, The Woodlands Texas 77381 Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067 Phone: 888.367.4286, or 281.367.4100 Fax: 281.292.2860 • www.detcon.com • service@detcon.com • sales@detcon.com All Technical Service and Repair activities should be handled by the Detcon Service Department via phone, fax or email at contact information given above.
Model TP-524D 7. TP-524D Sensor Warranty H2S Sensor Warranty Detcon Inc. warrants, under normal intended use, each new H2S sensor (PN 399-800000-000) for a ten year period under the conditions described as follows: The warranty period begins on the date of shipment to the original purchaser and ends ten years thereafter. The sensor element is warranted to be free of defects in material and workmanship.
Model TP-524D 8. Appendix 8.
Model TP-524D Operating Humidity: Operating Pressure: Air Velocity: 5-100% RH (Non-condensing) Ambient ± 10% 0-5 meters/second Mechanical Specifications Dimensions: 10”H (including Splashguard) x 6.1”W x 4.3”D (254mmH x 155mmW x 109mmD) 3 each ¾”NPT Female Input Ports ¼” Mounting Holes (J-box) 5.5” (140mm) Center to Center. Weight: 6 lbs. (2.72kg) (with aluminum j-box) 9 lbs. (4.
Model TP-524D 8.
Model TP-524D 8.3 Revision Log Revision Date 0.0 12/08/08 0.1 01/07/10 0.2 0.3 0.4 0.5 04/12/11 04/23/12 10/31/13 03/07/14 Changes made Initial Release Changed part number for TP-524D transmitter, added desiccant caps for TP sensor. (Section8.2) Updated warranty policy, (Section 7) Updated heater power settings (Section3.5.4) Updated cross interference gas (Table 1) Updated to include FM approvals related specifications Updated Section 6.2 and 8.2 Field Wiring, load resistor.
Model TP-524D This page left intentionally blank Shipping Address: 4055 Technology Forest Blvd, Suite 100, The Woodlands Texas 77381 Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067 Phone: 888.367.4286, 281.367.4100 • Fax: 281.292.2860 • www.detcon.com • sales@detcon.com TP-524D Instruction Manual Rev. 0.
