MSA Toxgard II Instruction Manual
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MSA Toxgard II Instruction Manual

MSA Toxgard II Instruction Manual

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Enlarged version
®
Toxgard
II Monitor

instruction manual

"! WARNING
THIS MANUAL MUST BE CAREFULLY READ BY ALL INDIVIDUALS WHO
HAVE OR WILL HAVE THE RESPONSIBILITY FOR USING OR SERVICING THE
PRODUCT. Like any piece of complex equipment, the unit will perform as
designed only if it is installed, used and serviced in accordance with the
manufacturer's instructions. OTHERWISE IT COULD FAIL TO PERFORM AS
DESIGNED AND PERSONS WHO RELY ON THIS PRODUCT FOR THEIR
SAFETY COULD SUSTAIN SEVERE PERSONAL INJURY OR DEATH.
The warranties made by Mine Safety Appliances Company with respect to the
product are voided if the product is not used and serviced in accordance with
the instructions in this manual. Please protect yourself and others by following
them. We encourage our customers to write or call regarding this equipment
prior to use or for any additional information relative to use or repairs.
In the U.S., to contact your nearest stocking location, dial toll-free 1-800-MSA-INST.
To contact MSA International, dial 1-412-967-3354.
© MINE SAFETY APPLIANCES COMPANY 2006 - All Rights Reserved
This manual is available on the internet at www.msanet.com
M a nu fa c ture d b y
MSA NORTH AMERICA
P.O. Box 427, Pittsburgh, Pennsylvania 15230
(L) Rev 7
711266

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Samuel W. Asihene
February 21, 2025

what is the lowest HCN concentration in ppm that will cause Toxgard II to sound an alarm

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Summary of Contents for MSA Toxgard II

  • Page 1: Instruction Manual

    We encourage our customers to write or call regarding this equipment prior to use or for any additional information relative to use or repairs. In the U.S., to contact your nearest stocking location, dial toll-free 1-800-MSA-INST. To contact MSA International, dial 1-412-967-3354.
  • Page 2 MSA Permanent Instrument Warranty 1. Warranty- Seller warrants that this product will be free from mechanical defect or faulty workmanship for a period of eighteen (18) months from date of shipment or one (1) year from installation, whichever occurs first, provided it is maintained and used in accordance with Seller’s...
  • Page 3 3. The Toxgard II monitor is designed to detect toxic gases or vapors in the air. It cannot measure the concentration of toxic gases or vapors in steam or inert or oxygen-deficient atmospheres.
  • Page 4 11. Do not install additional filters into the sample inlet fittings. Adding the filters will impair instrument performance. 12. Ensure the gas sample and Toxgard II unit are at the same temperature; otherwise, condensation will form, possibly clogging or filling the sample line.

  • Page 5: Table Of Contents

    General Description ......... . 1-1 Figure 1-1. Toxgard II Monitor ....... 1-2 Identifying Your Unit .
  • Page 6 Table of Contents Figure 1-6. Toxgard II Cable Entries ......1-11 Outputs ..........1-12 Relays .
  • Page 7 Table of Contents Oxygen Remote Sensor Wiring ....... 1-20 " WARNING ........1-20 "...
  • Page 8 Toxgard II Monitor Controller ........2-4...
  • Page 9 OXYGEN Calibration ........3-23 25% Oxygen Toxgard II Gas Monitor ......3-24 INITIAL Calibration .
  • Page 10 Table of Contents Figure 5-1. Change Sensor Flag ......5-2 Figure 5-2. Cap Location for Remote Combustible Gas Explosion-proof Sensor .

  • Page 11: Chapter 1 Set-Up

    Set-up Unpacking Your Unit Several cartons may arrive with your order; locate the carton(s) marked as the Toxgard II Monitor. Upon receipt, ensure that your package contains: • Toxgard II Monitor (FIGURE 1-1) • Toxgard II Monitor Instruction Manual (P/N 711266).

  • Page 12: Figure 1-1. Toxgard Ii Monitor

    Chapter 1, Set-up Figure 1-1. Toxgard II Monitor...

  • Page 13: Identifying Your Unit

    Chapter 1, Set-up Figure 1-2. Remote Sensor Model • All models are available as Remote Sensor models (FIGURE 1-2). Combustible gas models require the remote explosion-proof sensor module. To determine your sensor type and options, check the shipping carton (FIGURE 1-3) and sensor ID label. Checked items are included in the carton.

  • Page 14: Mounting Your Gas Monitor

    Mount the unit so that the front display is not blocked or hidden from view. " WARNING Do not locate the Toxgard II Monitor in an area which may contain a flammable mixture of gas and air; otherwise, an explosion may occur.

  • Page 15: Caution

    (FIGURE 1-1 or 1-2) pointed downwards; otherwise, the inlet may become clogged with particulate matter or liquids. Do not paint the Toxgard II Monitor. If painting is done in an area where a sensor is located, exercise CAUTION to ensure paint is not deposited on the sensor inlet fitting.

  • Page 16: For Toxgard Ii Pump Or Aspirator Model

    • In-line filter must be used in the sample line. • MSA tubing is available (P/N 600771). The pump or aspirator draws a gas sample to the Toxgard II Gas Monitor sensor (FIGURE 1-1): • Can be extended up to 100 feet (30 Meters) away from the...
  • Page 17 3/16" ID for 100-foot lines to prevent "Lo Flo." • It takes a maximum of 30 seconds for the sample gas to reach the Toxgard II Gas Monitor when 50 feet (15.25 meters) of tubing is used: • To decrease this time, shorten the sample line length.

  • Page 18: Exhaust Line Placement

    Chapter 1, Set-up • Fasten the sample tubing to supports. • Do not tightly pinch the tubing; otherwise, flow may be restricted. • Fasten the end of the sample tubing and sample inlet in the monitoring area. • The sample inlet should be pointed downward to prevent dirt and water from entering the sample tubing line.

  • Page 19: Blocked Flow Detection Of Sample Line

    " CAUTION Protect the Toxgard II Monitor from extreme vibration. Do not mount the sensing head in direct sunlight as this may cause the sensor to overheat. 1. Using suitable hardware (not supplied) mount the Toxgard II monitor to any flat surface;...

  • Page 20: Electrical Connections For Toxgard Ii Monitors

    " CAUTION Make all wiring connections and conduit runs according to accepted commercial wiring practices. Install the Toxgard II unit in compliance with the applicable requirements of the National Electrical Code and/or any other local code requirements.

  • Page 21: Caution

    (FIGURE 1-6). • Separate the power wiring from any signal wiring. • The Toxgard II unit operates on an AC power source of 120 or 220 VAC (no selection switch is necessary).

  • Page 22: Outputs

    • during calibration and for two minutes following calibration. Alarm Features There are alarm levels in the Toxgard II unit, and a relay for each level. There are many user-selectable alarm features enabled or disabled by selecting or de-selecting them.

  • Page 23: Fault Relay

    Horn Relay/Audible Outputs Audible Outputs • The Toxgard II Monitor comes equipped with one of the following audible alarms: • Piezo Horn (standard) - 75 db at five feet • Federal Horn - 95 db at five feet (not adjustable) •...

  • Page 24: Horn Relay

    One way to reduce this destructive sparking is to install a Quencharc protector (MSA P/N 630413) across the contacts. Milliamp Output The Toxgard II Monitor may be connected to any device capable of accepting 4 to 20 mA analog signals such as the: • MSA Model 5000 Monitor •...

  • Page 25: Isolated 4-20 Ma Output

    Isolated 4-20 mA Output • The Toxgard II current output [the (+) or upper terminal of TB1] connects to the isolator input (+) terminal • The Toxgard II signal return [the (-) or lower terminal of TB1] connects to the isolator input (-) terminal.

  • Page 26: Visual Outputs

    4. Route the cable to the push-button location; wire the button. Remote Sensors Electrical Connections for the Remote Sensor Module " WARNING Before wiring the Toxgard II Remote Sensor Module, disconnect the power source feeding the Remote Sensor Module and the Toxgard 1-16...

  • Page 27: Caution

    50 feet of cable. This cable has a connector on one end which plugs into its mate within the Toxgard II Monitor/Less Sensor. The other end of the cable can be cut to the exact length needed.

  • Page 28: Warning

    19206 BELDEN WIRE & CABLE CO. Appropriate wiring conduit must be used between the Toxgard II Monitor and the Toxgard II Remote Sensor. The cable must be routed through conduit. Wiring the Toxgard II Monitor/Less Sensor Using the Internal Terminal Block 1.
  • Page 29 3. Verify the identity of each conductor of the cable and connect the wire to the terminal block so that position 1 in the sensor is wired to position 1 on the Toxgard II Monitor TB2. Similarly, sensor positions 2 and 3 connect to Toxgard II positions 2 and 3.

  • Page 30: Warning

    Fifty feet of four-conductor cable is supplied with the unit. This cable has a connector on one end which plugs into its mate within the Toxgard II Monitor/Less Sensor; the other end of the cable can be cut to the exact length needed. Do not run more than 50 feet of cable or splice on any additional cable.

  • Page 31: Toxic Gas Remote Sensor Wiring

    5. Re-install the cover on the Toxgard II Remote Sensor. " WARNING Do not let the cover remain off of an explosion-proof Toxgard II Sensor. Since a source of ignition is exposed, an explosion may occur if a metal object contacts the circuitry and produces sparks in an atmosphere of combustible gas.

  • Page 32: Warning

    Pump Wiring (FIGURE 1-12) Dip Switch Settings Many of the Toxgard II features can be set with the SW2 and SW3 Dip Switches located on the main monitor printed circuit 1-22...

  • Page 33: Table 1-5. Sw2 Switch Settings

    Chapter 1, Set-up board (FIGURE 1-1). TABLES 1-5 and 1-6 show the positions for user-selectable settings (FIGURE 1-5): Table 1-5. SW2 Switch Settings NOTE: LEFT side of each SW2 Dip Switch indicates the ON position and RIGHT side of each SW2 Dip Switch indicates the OFF position. NUMBER FUNCTION SPARE...

  • Page 34: Controller/Calibrator Operation

    Toxgard II Monitor, including alarm conditions, auto calibration configuration, etc. The devices can also be used for calibrating the Toxgard II Monitor. When using these devices, point them at the front panel of the Toxgard II Monitor, aiming directly at the triangular IR symbol (located next to the word "WARNING"...

  • Page 35: Internal Push-Buttons

    For full Calibrator and Controller operational details, refer to instruction manual (P/N 813379). Internal Push-buttons A pair of internal push-buttons on the Toxgard II main pc board, lower-right corner (FIGURE 1-1) can be used in place of the Ultima Controller and Calibrator for most functions.
  • Page 36 Instrument address when used on a Ultima Plus Network CALIBRATION Days between Autocal calibrations (for Autocal operation INTERVAL only) CAL SIGNAL STATUS ON/OFF status of the 3.75-mA signal during calibration TEMPERATURE Toxic sensor temperature VALUE MSA diagnostic; please ignore VALUE VALUE 1-26...

  • Page 37: Changing Parameter Settings

    Chapter 1, Set-up Changing Parameter Settings Method 1 - Push-buttons The following parameters can be set by using the MODE and CAL push-buttons (located on the Toxgard II Monitor main printed circuit board): ON/OFF LATCH/UNLATCH VALUE ALARM 1 ON/OFF LATCH/UNLATCH...

  • Page 38: Method 2 - Ultima Controller

    The Toxgard II Monitor can be configured with an (internal) rechargeable backup battery that permits full instrument operation if main power is interrupted or the Toxgard II Monitor is used as a transportable instrument for temporary gas monitoring of an area;...
  • Page 39 Transfer to the backup battery is automatic when main power loss occurs. While operating on the backup battery, "BATT" lights on the Toxgard II display. When main power is restored, the "BATT" turns OFF, and the battery will start to recharge.

  • Page 40: Warning

    1. Disconnect the main operating power from the Toxgard II Monitor. 2. If the Toxgard II Monitor is equipped with an internal back-up battery, carefully disconnect the WHITE wire from the battery (+) terminal. NOTE: Record the position of the RED and BLACK wires connecting the horn to TB12 on the Toxgard II Monitor main pc board.
  • Page 41 RED and BLACK wires inside the T. 9. Replace the four screws and tighten to ensure a weatherproof seal. 10. Move the RED and BLACK wires connecting the horn and the Toxgard II Monitor main pc board into their original positions. 1-31...

  • Page 42: Warning

    Verify the proper operation, sound and loudness of the Banshee Horn; otherwise, the horn cannot properly alert the user. Autocalibration Option The Toxgard II Monitor is available with an autocalibration option This user-selectable option allows periodic, unmanned gas calibration of the system.

  • Page 43: Chapter 2 Start-Up

    Chapter 2 Start-up Initial Start-up The Toxgard II Monitor is factory-calibrated and ready for immediate use. Its range and output are preset. Once power is applied to the unit, the display shows a test of all display words and segments. The software version number displays; then, a 25-second warm-up countdown for sensor stability begins: •...

  • Page 44: Caution

    Toxgard II Monitor will display one of two modes: • LOC % LEL - The Toxgard II Monitor has been exposed to a high concentration of gas (above the LEL) and there is a possibility that the over-range condition may still exist.

  • Page 45: Caution

    Controller or by using the internal "CAL" push-button. NOTE: The Ultima Calibrator and Controller are compatible with both the Ultima Gas Monitor and the Toxgard II monitor. In the LOC mode, The Toxgard II Monitor will not revert to a normal condition until a successful zero operation has been performed.

  • Page 46: Non-Combustible Chemicals That Reduce Sensor Sensitivity

    Fluorine, Chlorine, Iodine or Bromine) • TABLE 2-1 lists interferants for electrochemical sensors. When it is determined that calibration adjustments are required, the Toxgard II Monitor provides a Figure 2-3. one-man, non-intrusive method of ® Ultima Calibrator adjustment at the unit.

  • Page 47: Table 2-1. Sensor Response To Interferants

    Chapter 2, Start-up Table 2-1. Sensor Response to Interferants CONCEN- INTER- TRATION FERANT (PPM) Acetone 1000 No Data No Data No Data No Data 12000 Acetylene No Data No Data No Data No Data No Data No Data No Data Ammonia No Data No Data...

  • Page 48: Toxgard Ii Monitor Calibration Output Signal

    See Calibrator and Controller instruction manual (P/N 813379) for proper calibration procedures. Toxgard II Monitor Calibration Output Signal The Toxgard II Monitor is shipped with the calibration output signal disabled so the output signal will track the gas concentration value during the calibration process. In some...

  • Page 49: Chapter 3 Calibration

    Three calibration kits (numbered 40, 41, and 54) are available from MSA for diffusion calibration of Toxgard II Gas Monitors. Kit 40 is also used to calibrate the Toxgard II Air Line Monitor. Calibration Kits 42 and 43 are used to calibrate Toxgard II monitors with pumped samples.
  • Page 50 Chapter 3, Calibration Table 3-1. Factory-set Span Values SPAN GAS MSA RP CALIBRATION GAS TYPE RANGE PRESET CYLINDER P/N VALUES 0-100 PPM 60 PPM 710882 CARBON MONOXIDE 0-500 PPM 300 PPM 10027938 0-25 PPM 10 PPM 10028070 SULFUR DIOXIDE 0-10 PPM...

  • Page 51: Calibration Kits 40 And 42

    Calibration Kit 54 will calibrate diffusion Hydrogen Chloride Toxgard II Monitors (FIGURE 3-5). Span Gas Values The Toxgard II Monitor is factory-shipped with a preset span gas value that can be changed via the Controller (P/N 809086); otherwise, the span gas must correspond to preset concentrations.
  • Page 52 Chapter 3, Calibration Item 1 - Tubing (P/N 711112) 3/16" ID side connects to Item 3; - 1/4" ID side connects to sensor Item 2 - Zero Cap (P/N 710535) Item 3 - 1.5 LPM Flow Controller (P/N 478358) Figure 3-1. Calibration Kit 40 Contents (Your Kit may also include one or two gas cylinders) Item 1 - Tubing (P/N 711112) - 3/16"...
  • Page 53 Item 1 - Tubing (P/N 711113) - 3/16" ID side connects to Item 2 - 1/8" ID side connects to Ultima or Toxgard II Sensor Item 2 - Flow Controller, Match Flow (P/N 697344) Figure 3-3. Calibration Kit 42 Contents...

  • Page 54: Toxgard Ii Gas Monitor Calibration

    The calibration procedure must be performed regularly. Calibration Documentation The Toxgard II Monitor records the date of the last successful calibration. This date can then be displayed on the front-panel LED (with the use of the Controller) or transmitted to a...

  • Page 55: To Zero The Toxgard Ii Gas Monitor Only

    Identify your Toxgard II Gas Monitor and select the proper one of the following two zeroing calibration procedures. • Use Procedure Number 1 to zero your unit for the following gases: •...

  • Page 56: Procedure Number 1

    Chapter 3, Calibration • Use Procedure Number 2 to zero your unit for the following gases: • Chlorine • Nitrogen Dioxide • Chlorine Dioxide • Hydrogen Cyanide Procedure Number 1 • This procedure uses items found in Calibration Kit 40, 42, and •...
  • Page 57 Chapter 3, Calibration Screw the Flow Controller onto the top of the zero gas cylinder. Locate the Tube Assembly (P/N 711112). Push the smaller end of the Tube Assembly over the Flow Controller gas outlet. • Ensure Figure 3-7. tubing Calibration Tubing Set-up completely covers the gas outlet (FIGURE 3-7).
  • Page 58 Chapter 3, Calibration 3. Point the Calibrator or Controller at the Toxgard II Gas Monitor display (FIGURE 1-2); press the ZERO button or push the right-hand internal CAL push-button (FIGURE 1-1) until the word "ZERO" appears; then, release. NOTE: The zero or calibration process can be aborted at any time during the 30-second countdown interval;...
  • Page 59 • An unsuccessful attempt to zero or calibrate the Toxgard II Gas Monitor • The Toxgard II Gas Monitor is operating with the calibration parameters defined before the calibration was attempted. To extinguish the CAL FAULT flag, a complete calibration procedure must be performed.

  • Page 60: Procedure Number 2

    Chapter 3, Calibration 5. If Using Zero Gas: After a successful zeroing, remove the tubing from the Flow Controller and remove the Flow Controller from the cylinder; return all items to their appropriate location in the Calibration Kit. If Using Zero Cap: Remove cap and return it to the Calibration Kit.
  • Page 61 • Notice the open arrow on the flow controller knob. 3. Point the Calibrator or Controller at the Toxgard II Gas Monitor display (FIGURE 1-2) and press the ZERO button or push the right-hand internal push-button (FIGURE 1-1) until the word "ZERO"...
  • Page 62 • An unsuccessful attempt to zero or calibrate the Toxgard II Gas Monitor • The Toxgard II Gas Monitor is operating with the calibration parameters defined before the calibration was attempted. To extinguish the CAL FAULT flag, a complete calibration procedure must be performed.

  • Page 63: Perform A Complete Calibration

    Identify your particular Toxgard II Gas Monitor and select the proper one of the following two calibration procedures. • Use Procedure Number 1 to calibrate the Toxgard II Gas Monitor for the following gases: • Carbon Monoxide •...
  • Page 64 Turn on the gas flow by turning the knob on the flow controller. • Notice the open arrow on the flow controller knob. 3. Point the Calibrator or Controller at the Toxgard II Gas Monitor display (FIGURE 1-2); press the CALIBRATE button or press and hold the right-hand internal push-button for about five seconds until the word SPAN appears on the display.

  • Page 65: Spanning

    • An unsuccessful attempt to zero or calibrate the Toxgard II Gas Monitor • The Toxgard II Gas Monitor is operating with the calibration parameters defined before the calibration was attempted. To extinguish the CAL FAULT flag, a complete calibration procedure must be performed.
  • Page 66 12. Turn ON the gas flow by turning the flow controller knob. • Notice the open arrow on the knob of the flow controller. • If a CAL FAULT indication is on the Toxgard II Gas Monitor display before the user is able to apply the gas (FIGURE 3-11), a steady state gas condition existed for longer than 15 seconds;...
  • Page 67 Chapter 3, Calibration Figure 3-15. Span Set-up • It is good practice to have all calibration components previously assembled. 13. After the 30 second countdown: • The display alternates between "CAL" and a value. (for example: 60 PPM for 0 to 100 ppm carbon monoxide).
  • Page 68 • An unsuccessful attempt to calibrate the Toxgard II Gas Monitor • The Toxgard II Gas Monitor is operating with the calibration parameters defined before the calibration was attempted. To extinguish the CAL FAULT flag, a complete calibration procedure must be performed.

  • Page 69: Zeroing

    Turn on the gas flow by turning the knob on the flow controller. • Notice the open arrow on the flow controller knob. 3. Point the Calibrator at the Toxgard II Gas Monitor display (FIGURE 1-2) and press the Calibrator or Controller 3-21...
  • Page 70 • An unsuccessful attempt to zero or calibrate the Toxgard II Gas Monitor • The Toxgard II Gas Monitor is operating with the calibration parameters defined before the calibration was attempted. To extinguish the CAL FAULT flag, a complete calibration procedure must be performed.

  • Page 71: Spanning

    13. Turn ON the gas flow by turning the flow controller knob. • Notice the open arrow on the knob of the flow controller. • If a CAL FAULT indication is on the Toxgard II Gas Monitor display before the user is able to apply the gas (FIGURE 3-11), a steady state gas condition existed for longer than 15 seconds;...
  • Page 72 • An unsuccessful attempt to calibrate the Toxgard II Gas Monitor • The Toxgard II Gas Monitor is operating with the calibration parameters defined before the calibration was attempted. To extinguish the CAL FAULT flag, a complete calibration procedure must be performed.

  • Page 73: Oxygen Calibration

    No calibration cap or zero gas is necessary. To meet the stated specification, it is necessary to span the Oxygen Toxgard II Gas Monitor with the Calibration Kit and an oxygen cylinder. The concentration of oxygen-in-air varies slightly due to changing relative humidity levels. These variations in oxygen levels are detected by the oxygen Toxgard II Gas Monitor.

  • Page 74: Toxgard Ii Airline Monitor, Pumped Version And Aspirated Version

    3. Insert the smaller end of the tube assembly (1/8" ID) into the calibration fitting and tighten the nut. 4. Initiate the calibration procedure on the Toxgard II Air Line Monitor, Pumped or Aspirated versions. 5. Press and hold the calibration valve button.
  • Page 75 Chapter 3, Calibration Figure 3-18. Typical DC Pump Version Installation Figure 3-19. Typical Air Aspirator Version Installation 3-27...

  • Page 76: Zero Procedure

    3. Insert the smaller end of the tube assembly (1/8" ID) into the calibration fitting and tighten the nut. 4. Initiate the Zero procedure on the Toxgard II Air Line Monitor, Pumped or Aspirated versions. 5. Press and hold the calibration valve button.
  • Page 77 Chapter 3, Calibration 6. Open the Regulator/Flow Controller valve on the gas cylinder. 7. At the end of this sequence, the Toxgard unit displays END. Close the Regulator/Flow Controller valve and release the calibration valve button. 8. Return the unit to normal operation. 3-29...

  • Page 78: Specifications

    Chapter 4, Specifications Chapter 4 Specifications Table 4-1. Specifications GAS TYPES Combustibles, Oxygen & Toxics OPERATING 0 to 40 RANGE: (32 to +104 TOXICS & OXYGEN *EXTENDED -20 to +50 TEMPERATURE RANGE: (-4 to +122 RANGE Calibrate within operating range -40 to +90 COMBUSTIBLES DUAL MODULE:...
  • Page 79 OUTPUT REQUIREMENTS COMBUSTIBLES 2-wire OXYGEN & TOXICS 120 - 220 VAC +15% POWER INPUT COMBUSTIBLES REMOTE SENSOR Supplied by Toxgard II Monitor COMBUSTIBLES 4-20 mA current source OXYGEN & SIGNAL OUTPUT TOXICS DIGITAL See Ultima Plus specifications 5 AMP WITH 120-240 VAC;...

  • Page 80: Warning

    Chapter 4, Specifications Table 4-1. Specifications PIEZO 75 db at five feet HORNS FEDERAL 95 db at five feet BANSHEE 100 db at three feet NORMAL General-purpose unit CONFIGURATION Unit can be configured to meet Class I, Division 2 Areas; this HAZARDOUS configuration will not have RATING...

  • Page 81: Maintenance

    Chapter 5 Maintenance General The Toxgard II Monitor may be cleaned with a dry soft cloth and requires minimal periodic maintenance to assure trouble-free operation. However, the response to gas must be checked regularly to assure the instrument is functioning.

  • Page 82: Sensor Replacement

    1. To replace the sensor, remove power from the Toxgard II Monitor. " WARNING Before removing the cover of an explosion-proof Toxgard II Monitor, sample the area around the enclosure with a portable combustible ® gas indicator (such as the MSA Passport...

  • Page 83: Sensor

    Chapter 5, Maintenance Figure 5-2. Cap Location for Remote Combustible Gas Explosion-proof Sensor Figure 5-3. Cap Location for Toxic Gas or Oxygen General-purpose Model...

  • Page 84: Explosion-Proof Sensor

    Use of the INITIAL calibration procedure upon installation of a new sensor ensures the Toxgard II Monitor will perform a successful calibration. Failure to do so may result in a CAL FAULT reading (FIGURE 5-6).

  • Page 85: Figure 5-6. Cal Fault Reading

    Chapter 5, Maintenance Figure 5-5. Combustible Three-Pin Connector Figure 5-6. CAL FAULT Reading It is recommended that all other maintenance be performed at an MSA factory-authorized service center. See TABLE 5-1 for troubleshooting guidelines.

  • Page 86: Table 5-1. Troubleshooting Guidelines

    *Hydrogen Cyanide, Hydrogen Chloride and Sulfur Dioxide Sensors NOTE: This NOTE and the following CAUTION apply to the Toxgard II Series sensors for Hydrogen Cyanide (HCN), Hydrogen Chloride (HCL) and Sulfur Dioxide (SO ) only. The Toxgard II Series product line contains a sensor detection function to alert the user of a sensor disconnection problem by displaying "ERR 1"...
  • Page 87 Chapter 5, Maintenance Table 5-1. Troubleshooting Guidelines SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION Display flashes Battery power exhausted Connect to line power for recharge. Err 6. Wiring error Check connections. Initial Calibration was not Perform Initial Calibration. performed. Output See SYMPTOM: "Display flashes Err signal Sensor cell missing.

  • Page 88: Obtaining Replacement Parts

    Failure to do so may seriously impair sensor performance. Repair or alteration of the Toxgard II Monitor, beyond the scope of these maintenance instructions or by anyone other than authorized MSA service personnel, could cause the product to fail to perform as designed and persons who rely on this product for their safety could sustain serious personal injury or death.

  • Page 89: Table 5-2. Replacement Sensor Kits

    S, SO and NO General-purpose Oxygen 710225 812075 General-purpose Cl , ClO , NO HCL and HCN 710436 Combustible Sensorgard gasket 812152 NOTE: Contatct 1-800-MSA-INST for factory support in determining the appropriate part numbers for explosion-proof or duct mount Sensorgards...

  • Page 90: Table 5-3. Spare Parts List

    Main printed circuit board (X-Y-Z corresponds to the first, sixth and seventh option code positions found on the nameplate of the main unit) Contact 1-800-MSA-INST for factory-support in determining the appropriate part number. 711033 Display printed circuit board Plastic Support, display printed circuit...

  • Page 91: Appendix A Optional Duct Mount Kit

    • The sensor and the Kit are sealed to the duct to prevent gas within the duct from escaping. • All Toxgard II remote sensors fit into the remote sensor model of the Duct Mount Kit. The Remote Sensor Module Duct Mount Kit: •...

  • Page 92: General

    Appendix A, Optional Toxgard II Duct Mount Kit • save valuable maintenance time and money • enhance calibrator safety. Mounting General Mounting the Remote Sensor on a duct is easily done with the Duct Mount Kit. The proper location on the duct will permit your sensor to operate up to its potential.

  • Page 93: Mounting

    Appendix A, Optional Toxgard II Duct Mount Kit Figure A-2. Duct Template Mounting 1. Locate the duct to be sampled. 2. Cut a rectangular hole [8.875 by 2.7 inches (225 by 68.5 mm)] in the duct (FIGURE A-2). • The gasket on the bottom of Duct Mount Kit must sit flat on the duct.

  • Page 94: Table A-1. Dual Module Duct Mount Kit Parts List

    634054 Six 10-32 Screws 627852 Six #10 Lock Washers 4. Locate the Remote sensor of the Toxgard II Gas Monitor to be installed in the duct. 5. Unscrew the cover of the Remote sensor and set aside. Figure A-4. Remote Sensor Clamp...

  • Page 95: Warning

    " WARNING Before removing the cover of an explosion-proof Remote Sensor Toxgard II Gas Monitor, verify that the surrounding area does not contain a flammable mixture of combustible gas and air, since a source of ignition is exposed; otherwise, an explosion may occur if a metal object contacts the circuitry and produces sparks.

  • Page 96: Warning

    " WARNING Do not let the cover remain off of an explosion-proof Remote Sensor Toxgard II Gas Monitor. Since a source of ignition is exposed, an explosion may occur if a metal object contacts the circuitry and produces sparks in an atmosphere of combustible gas.
  • Page 97 10-32 screws and lock washers. • These screws pass through the bracket and into two tapped holes in the module. 17. Push the Remote sensor Toxgard II Gas Monitor through the slit gasket on the Duct Mount base plate (FIGURE A-7).
  • Page 98 Screw one end of each spacer into the Duct Mount Kit base plate. 21. Place the Remote sensor Toxgard II Gas Monitor clamp on the top of the spacers. • Ensure the folded part of the clamp is mounted on the back side of the Remote Sensor Toxgard II Gas Monitor.

  • Page 99: Appendix B Definitions Of Terms

    Exhaust Gas: The gas after it passes the sensor. Flow Rate: The speed of the gas in the sample line. Pump: An electromechanical device which moves the gas sample to the Toxgard II instrument. Upscale: Instrument alarms on gas concentrations greater than or equal to the alarm value.

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