INSTRUCTION MANUAL Detcon Model TP-524D-HRT PGM MODEL 1 HOUSTON, TEXAS TP-524D MicroSafeTM H2S Gas Sensor FLT ALM ALM 1 2 CAL PGM 2 TP-524D-HRT 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 #3602 • Revision 0.
Model TP-524D-HRT 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.
Model TP-524D-HRT Table of Contents 1. 2. 3. 4. 5. 6. 7. 8. 9. Introduction ..................................................................................................................................................1 1.1 Description.......................................................................................................................................... 1 1.2 Modular Mechanical Design.................................................................................................
Model TP-524D-HRT Table of Figures Figure 1 Sensor Assembly Front View ................................................................................................................ 1 Figure 2 Circuit Functional Block Diagram......................................................................................................... 2 Figure 3 Transmitter Module ...............................................................................................................................
Model TP-524D-HRT 1. Introduction 1.1 Description Detcon Model TP-524D-HRT 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 HRT Bridge Interface, analog 4-20mA output. The HRT Bridge interface provides bi-directional digital communication with HART®-enabled devices.
Model TP-524D-HRT 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-HRT 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-HRT 2. Installation 2.1 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. 2. Ensure that the sensor is properly mounted in a vertical orientation with sensor facing down. Avoid use of Teflon Tape, or any type of non-conductive pipe thread coating on the NPT threaded connection. 3.
Model TP-524D-HRT Normal ventilation or prevailing wind conditions can dictate efficient location of gas sensors in a manner where the migration of gas clouds is quickly detected. Personnel Exposure The undetected migration of gas clouds should not be allowed to approach concentrated personnel areas such as control rooms, maintenance or warehouse buildings.
Model TP-524D-HRT There are some gases typically found in industrial environments that can cause a cross-interference response on the sensor. See the Table below for some examples.
Model TP-524D-HRT 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" mounting holes H2S Sensor Wall (or other mounting surface) 8-32 tapped ground point 2.1" Splash Guard 2" Figure 6 Typical Outline and Mounting Dimensions 2.5 Electrical Installation The Sensor Assembly should be installed in accordance with local electrical codes.
Model TP-524D-HRT 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 7 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-HRT 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-HRT c) Remove the desiccant cap about 10 minutes after applying power to the sensor and install the weatherproof splashguard accessory supplied with the sensor. NOTE: A desiccant cap with a desiccant packet is attached to the sensor cell housing 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.
Model TP-524D-HRT 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 10). 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-HRT 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-HRT 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-HRT 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-HRT 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-HRT 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-HRT View Sensor Status displays all current configuration and operational parameters including: sensor type, software version number, detection range, AutoSpan level, 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-HRT 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
Model TP-524D-HRT 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-HRT 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-HRT 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-HRT 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-HRT 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-HRT Input Voltage Fault If the detector is currently receiving an input voltage that is outside of the 11.5-28VDC range, an “Input Voltage Fault” is declared. An “Input Voltage Fault” will cause the “Fault Detected” message to scroll once a 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.
Model TP-524D-HRT 4. HRT Bridge The HRT Bridge interface is an integral part of the Transmitter Module for the TP-524D-HRT. The sensor utilizes the 4-20mA output with the added HART interface information. 4.1 Description The HRT Bridge PCA is a bi-directional digital communication interface that provides data communication between the Model TP-524D-HRT sensor and HART®-enabled devices.
Model TP-524D-HRT The HRT Bridge communicates with the TP-524D-HRT sensor through Modbus™. The HRT Bridge reads the appropriate Modbus™ register and creates the 4-20mA signal from the register reading. This allows the HRT Bridge complete control of the HART Communications. A red LED Labeled “MODBUS” will blink when communication with the sensor occurs. The HART interface has the ability to take the sensor into calibration.
Model TP-524D-HRT Figure 12 Primary Variables Primary Variables Concentration – the value of the gas concentration measured by the sensor. The units of measurement (ppm, ppb, or %) are shown to the right of the concentration value. This is the HART primary variable.
Model TP-524D-HRT 4.4.1.2 Identification The Identification screen contains 4 sections that provide some basic HART information as well as some additional sensor information. None of these variables are able to be changed in this screen, although some of these variables may be changed elsewhere. Figure 13 Identification HART Tags Tag – Text that is associated with the field device installation. This text can be used by the user in any way.
Model TP-524D-HRT 4.4.2 Diagnostics Menu The Diagnostics Menu contains two screens; 1) Device Status and 2) Channel Status. Both screens consist of a list of possible device error or status conditions. Next to each status condition is a small icon .that will be either green to display the normal status, or red to indicate an abnormal, changed, or a malfunction condition. 4.4.2.1 Device Status Device Status contains one screen that shows the status of the sensor and the HRT Bridge PCA.
Model TP-524D-HRT Loop current fault – The sensor has detected a condition where the 4-20mA output loop is not functional Input voltage fault – The sensor is currently receiving an input voltage that is outside of the 1228VDC range Memory fault – The detector has a failure in saving new data to memory Processor fault – The detector has an unrecoverable run-time error Clearing Fault – The sensor reading failed to clear after removal of span gas during an AutoSpan sequence Stability Fault – The sensor rea
Model TP-524D-HRT TP Figure 15 FP Configuration Setup The Range Set up will display the Model Type of the sensor, followed by the PV LRV (Primary Variable Lower Range Value) and the PV URV (Primary Variable Upper Range Value), and the Conc Units (Concentration Units), the display may also show the Sensor Range.
Model TP-524D-HRT Figure 16 FP Calibration Screen 4.4.3.3 Sensor Calibration using the HRT Bridge Calibration of a sensor using the HRT Bridge follows the same principle as calibrating the sensor via the magnetic interface. Since most of the calibration information can be found in Section 3.4 Calibration Mode, it is important to have the sensor manual on hand when performing sensor calibration. Auto Zero Auto Zero function is not used with the TP-524D-HRT Sensor.
Model TP-524D-HRT fall between 5% and 100% of range. However, any alternate span gas concentration value must be set in the “Auto Span Level” field before proceeding with “Autospan cal”. NOTE 1: Before performing AutoSpan Calibration, verify that the AutoSpan level matches the span calibration gas concentration as described in Section 3.5.2 Set AutoSpan Level. NOTE 2: The span gas source must have a normal background concentration of 20.9% O2 (H2S balanced with Air).
Model TP-524D-HRT “AutoSpan Complete” “Sensor Life XXX%” “Remove Span Gas” 8. When the sensor passes calibration the procedure will prompt to remove the span gas. Unsuccessful completion of the span calibration will create a Global Fault, and “Autospan Cal” will be aborted with a change to the HART Sensor Status (refer to section 4.4.2.2 Sensor Status). 9. After successfully setting span cal the sensor and the HART Interface will return to Automatic Mode. 10. The Auto Span Calibration is complete 11.
Model TP-524D-HRT 3) 4) 5) 6) 7) 8) 9) c) Connect the positive lead of a DVM set to measure milliamps to the other end of the resistor. d) Connect the negative lead (-) of the DVM to the ‘DC-’ terminal of the connector board. The procedure will set the output to 4ma, and prompt for the DVM Reading. Input the reading and select “OK”. The HRT Bridge will readjust the output for 4mA, and inquire if the reading is 4mA on the DVM (select “YES” or “NO”).
Model TP-524D-HRT Figure 18 HART Setup Tag – Text that is associated with the field device installation. This text can be used by the user in any way. A recommended use is a unique label that correlates to a field device label: a plant drawing, or on a control system. This variable is also used as a type of data link layer address handle. Long Tag – Functions exactly like the Tag except the size is larger (max 32 ISO Latin 1 characters).
Model TP-524D-HRT 5. 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.
Model TP-524D-HRT 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-HRT 6. 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 19 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-HRT 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-HRT 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-HRT 7. 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-HRT 8. TP-524D-HRT 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-HRT 9. Appendix 9.
Model TP-524D-HRT Storage Temperature: -35°C to +55°C (-31°F to +131°F) Operating Humidity: Operating Pressure: Air Velocity: 5-100% RH (Non-condensing) Ambient ± 10% 0-5 meters/second Mechanical Specifications 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-HRT 9.
Model TP-524D-HRT 9.3 Revision Log Revision 0.0 0.1 0.2 0.3 Date 12/01/10 04/23/12 10/31/13 03/10/14 Changes made Initial Release Updated Section 2.6 Field Wiring, load resistor Added setting LED Alarm Levels Add notation on use of desiccant pack with sensor cell Approval LBU LU LU BM 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.
Model TP-524D-HRT 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-HRT Instruction Manual Rev. 0.
