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Sierra Monitor Corporation 4105 SERIES Applicability & effectivity Manual

Gas sensor module with digital display and non-intrusive calibration
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MODEL 4105 SERIES
GAS SENSOR MODULE
WITH DIGITAL DISPLAY AND
NON-INTRUSIVE CALIBRATION
4-20 mA

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Summary of Contents for Sierra Monitor Corporation 4105 SERIES Applicability & effectivity

  • Page 1 MODEL 4105 SERIES GAS SENSOR MODULE WITH DIGITAL DISPLAY AND NON-INTRUSIVE CALIBRATION 4-20 mA...
  • Page 2 Sierra Monitor Corporation 1991 Tarob Court, Milpitas, CA 95035 (408) 262-6611 (800) 727-4377 Fax: (408) 262-9042 E-Mail: sierra@sierramonitor.com MODEL 4105 SERIES GAS SENSOR MODULE WITH DIGITAL DISPLAY AND NON-INTRUSIVE CALIBRATION 4-20 mA APPLICABILITY & EFFECTIVITY This manual provides instructions for the following Sierra Monitor products:...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION PAGE 1. PRODUCT DESCRIPTION 1.1 Introduction 1.2 Application 1.3 Configuration 1.3.1 Electronics 1.3.2 Sensor 2. CAUTIONS WARNINGS & RECOMMENDATIONS 2.1 Introduction 2.2 Wiring 2.3 Sensor Modules - General 2.4 Preventative Maintenance 3. QUICK START 3.1 Overview 3.2 Wiring 3.3 Module Installation 3.4 Wiring Connection...

  • Page 4: Product Description

    Instruction Manual PRODUCT DESCRIPTION 1.1 Introduction Model 4105 Series Gas Sensor module features non- intrusive calibration, 4-20 mA output signal and local continuous display of the gas concentration in ppm (toxics), % LEL (Combustibles), or % vol (Oxygen). It is designed for use with industry standard control in- struments.

  • Page 5: Cautions Warnings & Recommendations

    Instruction Manual CAUTIONS WARNINGS & RECOMMENDATIONS Wire Gauge Maximum Length 20 AWG 2,000 Ft. 2.1 INTRODUCTION 18 AWG 3,000 Ft. 16 AWG 4,000 Ft. Although the sensor module is designed and con- 14 AWG 6,500 Ft. structed for installation and operation in industrial 12 AWG 9,000 Ft.

  • Page 6: Quick Start

    Instruction Manual QUICK START 3.1 Overview The gas sensor module has been supplied factory cali- brated and ready for immediate installation and opera- tion. An installer familiar with installation and opera- tion of gas detection products can use this section to begin immediate use of the monitor.

  • Page 7: Operation

    Instruction Manual OPERATION 4.1 Introduction Under normal conditions the sensor module does not require operator or technician intervention. The fol- lowing are conditions under which the module requires attention: - Routine periodic calibration. - Calibration after a high gas alarm. - Sensor replacement on a planned schedule or when a sensor failure occurs.

  • Page 8: Calibration

    Instruction Manual CALIBRATION 5.1 Frequency of Calibration Connect the calibration adapter and expose the sen- The manufacturer recommends that the gas sensor sor to an appropriate SPAN gas using a span mixture module be calibrated every ninety days. containing a known concentration of the gas of inter- est at a minimum flow rate of 300 cc/minute.

  • Page 9: Service

    Instruction Manual SERVICE 6.3 Transmitter Replacement The transmitter assembly should be replaced when it 6.1 Sensor Module Configuration is determined that it is unreliable, noisy or cannot be The gas sensor module is comprised of the following adjusted for calibration. This may occur due to age, sub assemblies: corrosion or failed components.
  • Page 10 Instruction Manual 6.4a. Combustibles 1. Verify the voltage across A to R equals 2 volt. If The 4105-XX has 4 fixed ranges of sensitivity, • not, adjust volts potentiometer R11 which are selectable via JP1. 2. Verify the voltage from GND (TB2) to VOUT The JP1 positions are labeled 1, 2, 3 &...

  • Page 11: Installation

    Instruction Manual INSTALLATION 7.1 Sensor Locations Select locations for each of the sensors based on the Sensors may be mounted directly onto the end of a following: vertical conduit, or bracketed to a vertical surface us- ing the two mounting flanges. Insure that the body of the enclosure is at least 1"...
  • Page 12 Instruction Manual V O U T V O U T R I B B O N C A B L E R I B B O N C A B L E R 1 9 T O C P U A S S Y . T O C P U A S S Y .

  • Page 13: Specifications

    Instruction Manual SPECIFICATIONS Model 4105-02 4105-03 4105-04 4105-05 4105-06 4105-07 4105-10 Comb. Sensor Type Catalytic E.C. E.C. E.C. E.C. E.C. Units %LEL % Vol Range 0-100 0-25% 0-1000 0-100 0-10 0-1000 0-100 Resolution 3% F.S. 0.1% F.S. Response Time Note 1 10 sec.
  • Page 14 Instruction Manual SPECIFICATIONS (Continued) Model 4105-12 4105-21 4105-22 4105-25 4105-26 Sensor Type E.C. E.C. E.C. E.C. E.C. Units Range 0-20 0-20 0-20 0-50 0-10 Resolution Response Time 35 sec. 150 sec 70 sec. 45 sec. 30 sec. to 90% of signal Sensor Life 2 yrs 2 yrs...
  • Page 15 Instruction Manual SPECIFICATIONS (Cont.) Cross Sensitivities (toxic sensors) Model Reading from 100 ppm of interfering gas Number Type 4105-04 <40 <50 4105-05 <0.5 <0.1 <15 4105-06 <-10 4105-07 <1 <20 4105-10 <1 -100 4105-12 4105-21 4105-22 <0.5 -190 <1 4105-25 4105-26 Page: 12 Model 4105 Gas Sensor Module (12/02)

  • Page 16: Replacement Parts

    5311-00 Rainshield 10. LIMITED WARRANTY SIERRA MONITOR CORPORATION warrants its products In all cases SMC’s responsibility and liability under this to be free from defects in workmanship or material under warranty shall be limited to the cost of the equipment. The normal use and service for two years after date of shipment.

  • Page 17: Appendices

    Instruction Manual Appendix B: L.C.D. Readout Calibration Procedure Appendix A: Unity Gain Mode The Unity magnetic control is available during CAL The 3 1/2 digit LCD meter span and decimal points MODE to allow the ZERO and SPAN adjustments to be may be configured for full scale ranges such as 1- centered within their range.
  • Page 18 Instruction Manual Appendix C: Combustible Gas Scaling Factors (Table 1) Where possible, calibration gas should be the same as the gas to be detected. If this is not possible then a scaling factor should be used to determine the “equivalent value” of the calibration gas in terms of the gas to be detected. (Note: Concentration of calibration gas must be less than the factor number listed on Table 1).
  • Page 19 Instruction Manual COMBUSTIBLE GAS SCALING FACTORS For combustible gas monitoring, a calibration standard of Methane or Propane my be used in conjunction with scaling factors to cause alarm function in %LEL scale of another gas as follows: METHANE PROPANE METHANE PROPANE FACTOR FACTOR...

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