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MODEL 4501-XX
2-Wire Series
TOXIC GAS SENSOR MODULE
APPLICABILITY & EFFECTIVITY
Effective for all Model 4501-XX Modules manufactured after September 1, 2006.
4501-04 FM Pending
4501-05 FM Approved
4501-06 FM Pending
Instruction Manual Part Number T13022
Rev. A
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Model 4501-XX Toxic Gas Sensor Module FM PERFORMANCE APPROVAL ONLY THE FOLLOWING ITEMS, FUNCTIONS AND OPTIONS ARE FM* APPROVED Model 4501-05 Hydrogen Sulfide Gas Sensor Module Sensor Module Model 4501-05 Sensor Module - Hydrogen Sulfide Calibration Equipment Model 1250-01 Gas Sensor Calibration Kit, Type A Model 1260-05 Hydrogen Sulfide in N2, 25 ppm Gas Cylinder Model 1260-45 Hydrogen Sulfide in N2, 10 ppm Gas Cylinder Model 5358-01 Calibration Adapter
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Model 4501-XX Toxic Gas Sensor Module TABLE OF CONTENTS 1. PRODUCT DESCRIPTION .............................................................................................................................1 1.1 GENERAL........................................................................................................................................................1 1.2 MOUNTING CONFIGURATION...................................................................................................
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Model 4501-XX Toxic Gas Sensor Module 7.4.2 CABLING INSTALLATION .....................................................................................................................16 7.4.3 SENSOR MODULE INSTALLATION .....................................................................................................16 7.4.4 MOISTURE TRAPS AND RAINSHIELDS..............................................................................................17 7.4.5 STANDARD VOLTAGES .................
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Model 4501-XX Toxic Gas Sensor Module 1. PRODUCT DESCRIPTION 1.1 GENERAL The Model 4501-XX Toxic Gas Sensor Module is a 2-wire transmitter with 4-20 mA output and it offers a broad array of features including: • 2-wire loop powered • 180 day calibration interval • Selectable ranges • Non-intrusive one-person calibration • Integral LCD 2-line, 20-character display • Stainless steel enclosure and sensor housing • 4-20 mA output • Long sensor life • Rotatable faceplate enables multi-d
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Model 4501-XX Toxic Gas Sensor Module 1.4 MECHANICAL The sensor module is comprised of the following three primary components: 1.4.1 ENCLOSURE Explosion proof, rain-tight stainless steel electrical housing with three ¾” FNPT conduit hubs. The enclosure cover has a viewing window. The 3 conduit hubs combined with the rotatable faceplate enable the user to mount the module in a variety of configurations. See Figure 1-2 for details. 1.4.2 TRANSMITTER ELECTRONICS Electronic Assembly consist
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Model 4501-XX Toxic Gas Sensor Module Figure 1-1 Model 4501-05 Hydrogen Sulfide Gas Sensor Module– Dimensions Figure 1-2 Model 4501-05 Hydrogen Sulfide Gas Sensor Module– Orientation Options Page: 3
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Model 4501-XX Toxic Gas Sensor Module 2. CAUTIONS & WARNINGS 2.1 INTRODUCTION Although the 4501-XX Gas Sensor Module is designed and constructed for installation and operation in industrial applications including hostile environments, caution should be taken to insure that the installation is made in compliance with this instruction manual and that certain procedures and conditions are avoided. This chapter discusses the necessary cautions. Read the entire chapter prior to installation o
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Model 4501-XX Toxic Gas Sensor Module 3. QUICK START 3.1 OVERVIEW The gas sensor module has been supplied factory calibrated and ready for immediate installation and operation. An installer familiar with installation and operation of gas detection products can use this section to begin immediate use of the module. 3.2 WIRING Provide two conductor shielded wiring from the power supply/control device to the sensor module location. Use wire that is 16 AWG or larger. 3.3 MODULE INSTALLA
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Model 4501-XX Toxic Gas Sensor Module 4. INSTALLATION 4.1 SENSOR MODULE LOCATIONS The gas sensor module utilizes a diffusion type sensor which should be located close to either the expected source or destination of the gas hazard. If the gas is heavier than air, the sensor module should be installed within 24 inches of the ground or floor. If it is lighter than air, move it above 6’. After optimum locations are determined based on the above recommendations, consideration should be given
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Model 4501-XX Toxic Gas Sensor Module 1. Remove the transmitter from the module housing by: • Unscrew the two captive panel screws on the faceplate. • Lift the transmitter out of the enclosure. • Unplug the sensor cable from transmitter connector J1. • Remove the sensor assembly from the enclosure hub. 2. Install the module enclosure onto the end of the supply conduit and/or bolt into position as required. NOTE When enclosure earth grounding is required for the installation a grounding
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Model 4501-XX Toxic Gas Sensor Module 5. OPERATION 5.1 INTRODUCTION The 4501-XX Toxic Gas Sensor Module utilizes a visual menu system operated by means of a magnet. A magnet stick is supplied for this purpose. The menu system is used to calibrate the sensor module, and for maintenance and diagnostic procedures. The following adjustments can be made to the sensor module: Range adjustments (see section 5.4) 4mA and 20mA calibration adjustments (see section 5.4) Span adjustment (see
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Model 4501-XX Toxic Gas Sensor Module 5.3 MAIN MENU Key Function Display Description Reference M E Mode Switch [M] M E Enter Switch [E] ME Up Switch [ ▲] Previous Menu ME Down Switch [ ▼] Next Menu 4501-XX First screen at power-up, Model and Version XX.XXaA Warm 148 Second screen at start-up, count down of Warm-up XX.XXaA H2S Default Display (example 4501-05) XXX.PPM M E H2S Mode Mode Function: Calibration (example 4501-05) Table 6-1 CALIB: M E H2S Down Mode Function: Maintenance (exampl
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Model 4501-XX Toxic Gas Sensor Module 5.4 MAINTENANCE SUB-MENU Key Function Display Description Reference H2S Default Display (example 4501-05) XX PPM M E H2S Mode CALIB: ME H2S Down MAINT: M E Enter Calibration 4 mA Menu Enter Cal: 4mA Banner: Use [ ] or [ ] to change 4mA output, [E] when done A multi-meter should be inserted into the current loop to measure the loop current between the power and the sensor module No gas is required for this step M E 4mA Enter Acknowledges 4mA calibr
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Model 4501-XX Toxic Gas Sensor Module 5.5 DIAGNOSTICS SUB-MENU Description Key Function Display Reference M E H2S Mode Default Display(example 4501-05) XXX PPM M E H2S Enter Go to previous maintenance menu item CALIB ME H2S Down MAINT: ME H2S Down DIAG: M E DIAG: Enter Enter diagnostics sub-menu RawSig M E D-RawSig Enter Voltage reading of the output of the sensor element XXXXmV M E DIAG: Mode Return to diagnostic menu RawSig ME DIAG: Down Ref M E D-Ref Enter Voltage reading of the out
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Model 4501-XX Toxic Gas Sensor Module 5.5.1 NOTES When selecting the output current requested, an acknowledge message will appear on the screen. Select [E] to accept this message. Whenever a message appears on the screen, select [E] to accept the message. No other action can be taken with messages. Except for the FactInit Menu, the sub-menus in the diagnostics section only provide information and do not cause action. Page: 12
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Model 4501-XX Toxic Gas Sensor Module 6. CALIBRATION 6.1 CALIBRATION FREQUENCY The sensor module must be calibrated every 180 days. Periodic functional tests are advisable for critical applications and hostile environments. The sensor module microprocessor software includes high-level self checking algorithms which provide continuous sensor diagnostic and self adjustment. 6.2 CALIBRATION PREPARATION Calibration of the sensor is accomplished by simple menu based steps and application of
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Model 4501-XX Toxic Gas Sensor Module 6.3 DIAGNOSTICS SUB-MENU Key Function Display Description Reference M E H2S Mode Default Display (example 4501-05) or Sub-Routine A CALIB: M E Enter CAL 0 PPM Banner: Apply zero gas, [E] when done Operation: Confirm area clear of gas, or apply zero air to sensor. M E Cal0PPM There is a minimum time to calibrate at 0PPM. If [E] is hit prior to this time Enter Wait.XXX has elapsed, a countdown screen will appear. Zero gas setting completed (Message wil
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Model 4501-XX Toxic Gas Sensor Module 7. SERVICE 7.1 SENSOR MODULE CONFIGURATION The gas sensor module is comprised of the following sub-assemblies (Figure 7-1): 4501-XX Gas Sensor Module SPL27077 Enclosure SPM27071 Transmitter Assembly XXXXXXX Sensor Assembly (see Appendix B) XXXXXXX Sensor (see Appendix B) There are no field serviceable components below the sub assembly level. ENCLOSURE REPLACEMENT The enclosure should be replaced if the cover threads or conduit threads have bee
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Model 4501-XX Toxic Gas Sensor Module TRANSMITTER REPLACEMENT The transmitter assembly should be replaced when it is determined that it is unreliable, noisy or cannot be adjusted for calibration. This may occur due to age, corrosion or failed components. To replace the transmitter assembly: a. Remove the cover of the main enclosure o b. Unscrew the two thumb screws in the top of the cover plate, lift the assembly and rotate 90 to relieve the wiring service loop c. Unplug the sensor co
