MSA Ultima Instruction Manual
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MSA Ultima Instruction Manual

MSA Ultima Instruction Manual

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Ultima
Gas 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 2004 - All Rights Reserved
Manufactured by
MSA INSTRUMENT DIVISION
P.O. Box 427, Pittsburgh, Pennsylvania 15230
(L) Rev 12
813161

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  • Page 1 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 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 Ultima Gas Monitor is designed to detect gases or vapors in air. It cannot measure the concentration of gases or vapors in steam or inert or oxygen-deficient atmospheres.
  • Page 4 2. The Ultima Gas Monitor must not be painted. If painting is done in an area where a Monitor is located, care must be...

  • Page 5: Table Of Contents

    Three Mounting Methods ........1-8 Mounting the Ultima Remote Sensor Module ..... . 1-8 Figure 1-9.
  • Page 6 4-20 mA Signal Output (Three Wire Sensor) ... 1-14 Typical Wiring of the Ultima Gas Monitor ......1-15 Table 1-6.
  • Page 7 Non-combustible Chemicals that Reduce Catalytic Sensor Sensitivity . . . 2-4 Ultima Gas Monitor Calibrator ........2-4 Figure 2-3.
  • Page 8 General ........... A-1 Figure A-1. Ultima Duct Mount Kit ......A-1 Mounting .
  • Page 9 Figure A-6. Ultima Gas Monitor Enclosure Gasket ....A-5 Figure A-7. Ultima Gas Monitor Plate ......A-6 Figure A-8.
  • Page 10 Internal Relays (4-20 mA or Frequency Output Models) C-4 Ultima Gas Monitor Internal Relays ......C-4 Relay Specifications .

  • 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 Ultima Gas Monitor or Ultima Gas Monitor/Less Sensor. Upon receipt, ensure that your package contains: • Ultima Gas Monitor (FIGURE 1-1) • Ultima Gas Monitor Instruction Manual (P/N 813161). If...

  • Page 12: Identifying Your Unit

    Identifying Your Unit All models of the Ultima Gas Monitor, all housed in rugged, aluminum enclosures are designed to meet NEMA 4X. These versions with milliamp or frequency output can be installed as Intrinsically Safe for Classification I, Groups B, C and D, Division, 1, Hazardous Locations;...
  • Page 13 Chapter 1, Set-up • Two models are available in housings GENERAL-PURPOSE (FIGURE 1-1): • Toxic Gases • Oxygen • Three models are available in housings EXPLOSION-PROOF certified for Classification I, Groups B, C and D, Division 1, Hazardous Locations. • Combustible Gas (FIGURE 1-3): •...

  • Page 14: Hazardous Area Rating

    Figure 1-5. Shipping Carton Label Identifying Sensor Type This label identifies: • Sensor supplied (Ultima Gas Monitor, Ultima Gas Monitor Less Sensor, or Ultima Remote Sensing Module) • Type of gas (combustible gas, toxic gas or oxygen) • Range [% LEL, PPM (parts per million), or %] •...
  • Page 15 Class I, Division 1, Groups B, C and D areas, while others can only be used in Groups C and D areas. The larger, metal Approval Label on the Ultima Gas Monitor (FIGURE 1-7) will indicate the rating of your particular model and if it is approved for use in hazardous areas.

  • Page 16: Intrinsically Safe Rating

    Cable Grip for General-Purpose or Intrinsically Safe Installations Intrinsically Safe Rating Some models of the Ultima Gas Monitor can be used in hazardous atmospheres as intrinsically safe and must be installed according to the National Electric Code and the appropriate control drawings.

  • Page 17: Mounting Your Gas Monitor

    Generally, the unit or the remote sensing module should be mounted close to the area where a leak is likely to occur or where the gas is expected. The Ultima Gas Monitors or the remote sensing module should be installed at a high level (ceiling) or low level (floor), depending on the density of the gas most likely to be found.

  • Page 18: Mounting Guidelines For The General-Purpose Gas Monitor

    Sensor Module. It is mounted at a convenient, accessible location while the Remote Sensor Module is mounted where the gas is expected. Mounting the Unit Use one of the following three methods to mount the Ultima Gas Monitor/Less Sensor or the Ultima Gas Monitor. Three Mounting Methods •...
  • Page 19 Chapter 1, Set-up Figure 1-10. Mounting Strap Mounting Method Figure 1-11. Mining Mounting Method...

  • Page 20: Electrical Connections For Ultima Gas Monitors

    Chapter 1, Set-up FIGURE 1-13. The sensor module wiring is routed to the Ultima Gas Monitor which does not contain a sensor. Permanently connect 1/4" OD tubing to the center post of the sensor inlet. Route this tubing to the Ultima Gas Monitor, ensuring that there are no kinks, leaks or other obstructions.
  • Page 21 Oxygen Models with 4 to 20 mA output, that are to be operated in Figure 1-15. connection with Ultima accessory Three-Wire Harness Assembly functions (relays, pumps, etc.). If it is not possible to use the wiring harness, open the unit and...

  • Page 22: Wiring For All Models (Except Digital Output Models)

    TABLES 1-1 through 1-7 do not apply to Ultima Gas Monitors with Internal Relays. If Internal Relays exist, see Appendix C.

  • Page 23: For Milliamp Output

    10 volts DC required at the sensor for proper operation of Combustible IR models. For Milliamp Output The Ultima Gas Monitor may be connected to any device capable of accepting 4 to 20 mA analog signals such as the: • Model 5000 unit (with 4 to 20 mA inputs) •...

  • Page 24: Warning

    Chapter 1, Set-up An external power supply is required. The 4 to 20 mA output version of the Ultima Gas Monitor requires 7 to 30 VDC at the sensor input for proper operation (10 VDC required for Combustible IR models). All connections should be made by following appropriate wire code procedures.

  • Page 25: Typical Wiring Of The Ultima Gas Monitor

    16,000 2,800 Typical Wiring of the Ultima Gas Monitor • Two-wire 4 to 20 mA Ultima Monitors operate in the current mode (FIGURE 1-17) • Three-wire Ultima Monitors operate in the current source, frequency, or multiplex frequency mode, depending on your model.

  • Page 26: Electrical Connections For The Ultima Remote Sensor Module

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

  • Page 27: Caution

    For Catalytic Type Combustible Models Three conductors are required for the Combustible Remote Sensor Module. The Ultima unit has a three-wire terminal strip with a pre-attached 18-inch harness pigtail to accommodate #12 AWG conductors; the sensor has a similar terminal strip.
  • Page 28 Wiring the Ultima Gas Monitor/Less Sensor Using the 18-inch Wiring Harness Splice up to 50 feet of additional cable to the wiring harness coming from the Ultima Gas Monitor. Use a properly-rated junction box to make all of the connections.

  • Page 29: Warning

    Wiring the Ultima Gas Monitor/Less Sensor Using the Internal Terminal Block 1. Unscrew the cover of the Ultima Gas Monitor/Less Sensor. "! WARNING Before removing the cover of an explosion-proof Ultima Gas Monitor/Less Sensor, verify that the surrounding area does not contain a flammable mixture of combustible gas and air, since a source of ignition is exposed;...

  • Page 30: Warning

    10. Re-install the cover of the Ultima Gas Monitor/Less Sensor. "! WARNING Do not let the cover remain off of an explosion-proof Ultima Gas Monitor/Less 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 31: Warning

    2. Route the cable from the Ultima Gas Monitor through the conduit opening and wire it to the terminal block in the bottom of the sensor.

  • Page 32: Warning

    Chapter 1, Set-up "! WARNING Do not let the cover remain off of an explosion-proof Ultima Gas 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 33: Warning

    FIGURE 1-25 for the colors of the wires that are needed. At the Ultima Remote Sensor Location 1. Open the Ultima Remote Sensor cover by unscrewing it. "! WARNING Before removing the cover of an explosion-proof Ultima...

  • Page 34: Warning

    For Toxic Gas and IR Combustible Models Fifty feet of cable is supplied with the unit. This cable has a connector on one end which plugs into its mate within the Ultima Gas Monitor/Less Sensor. The other end of the cable can be cut to the exact length needed.

  • Page 35: Warning

    Figure 1-28. IR Combustible Remote Sensor Cable At the Ultima Remote Sensor Location 1. Open the Ultima Remote Sensor cover by unscrewing it. "! WARNING Before removing the cover of an explosion-proof Ultima Remote Sensor, verify that the surrounding area does not contain a flammable mixture of combustible gas and air since a source of ignition is exposed;...

  • Page 36: Warning

    Chapter 1, Set-up 2. Route the cable from the Ultima Gas Monitor through the conduit opening and wire it to the terminal block in the bottom of the sensor. 3. Verify the identity of each conductor cable and connect the wire to the terminal block (FIGURE 1-26).

  • Page 37: Chapter 2 Start-Up

    Chapter 2, Start-up Chapter 2 Start-up Initial Start-up The Ultima Gas Monitor is factory-calibrated and ready for immediate use. Its range and output are preset. Once power is applied to the unit, the LCD shows a test of all display words. The software version number displays;...

  • Page 38: Caution

    To ensure a fully functional sensor, perform a calibration check and adjustments at initial start-up. After initial start-up, the Ultima Gas Monitor also displays a calibration flag as a reminder to perform a field calibration (FIGURE 2-2). While this message is displayed, the Ultima Gas Monitor is functioning within factory-set calibration parameters.

  • Page 39: Caution

    Chapter 2, Start-up • + LOC % LEL - The Ultima Gas 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. • + 100 % LEL - The Ultima Gas Monitor has been exposed to a high concentration of gas (above the LEL) and the over-range condition definitely still exists.

  • Page 40: Non-Combustible Chemicals That Reduce Catalytic Sensor Sensitivity

    When it is determined that Figure 2-3. calibration adjustments are Ultima Gas Monitor Calibrator required, the Ultima Gas Monitor provides a one-man, non-intrusive method of adjustment at the unit. To calibrate the unit, one of the following accessories is necessary: •...

  • Page 41: Ultima Gas Monitor Controller

    • Automatic calibration at timed intervals when used with MSA Ultima Gas Monitor auto-calibration module. • Three levels of alarm and relays when used with an MSA Ultima Gas Monitor Relay module • Date of last successful calibration •...
  • Page 42 Chapter 2, Start-up Table 2-1. Sensor Response to Interferants CONCEN- INTERFERANT TRATION (PPM) 1000 Acetone No Data No Data No Data 12000 Acetylene No Data No Data No Data No Data No Data No Data -1.0 Ammonia No Data No Data Benzene No Data 5000...
  • Page 43 Chapter 2, Start-up Table 2-1. Sensor Response to Interferants (continued) CONCEN- INTERFERANT TRATION (PPM) Ammonia No Data No Data No Data No Data No Data Arsine No Data No Data Bromine No Data No Data No Data No Data No Data Butane 2000 Carbon Dioxide...
  • Page 44 Chapter 2, Start-up Table 2-1. Sensor Response to Interferants (continued) CONCENTRATION INTERFERANT (PPM) Ammonia No Data No Data Carbon Monoxide No Data No Data Carbon Monoxide No Data No Data No Data Chlorine No Data Ethylene No Data No Data No Data Hydrogen Chloride No Data...

  • Page 45: Chapter 3 Specifications

    Chapter 3, Specifications Chapter 3 Specifications Table 3-1. Performance Specifications GAS TYPES Combustibles, Oxygen & Toxics OPERATING 0 to 40 C (32 to +104 RANGE: TOXICS & OXYGEN *EXTENDED -20 to +50 C (-4 to +122 RANGE: OPERATING 10 to 40 C (50 to 104 RANGE: HYDROGEN...
  • Page 46 Chapter 3, Specifications Table 3-1. Performance Specifications LINEARITY REPEATABILITY CARBON the greater of + 1% FS or 2 ppm + 2% full scale (FS) MONOXIDE + 2% FS + 1% FS OXYGEN HYDROGEN + 10% FS or 2 ppm + 1% FS or 2 ppm SULFIDE + 10% FS or 2 ppm + 5% FS or 1 ppm...
  • Page 47 Chapter 3, Specifications Table 3-1. Performance Specifications TIME TO REACH 20% OF SCALE: OXYGEN & Less than 12 seconds (typically 6 seconds) TOXICS ETHYLENE Less than 20 seconds OXIDE TIME TO REACH 50% OF SCALE: OXYGEN & Less than 30 seconds (typically 12 seconds) TOXICS STEP ETHYLENE...
  • Page 48 7-30 VDC @ 41 mA max. TOXICS POWER INPUT CATALYTIC mA VERSIONS 7-30 VDC @ 450 mA maximum COMBUSTIBLES (for power input with internal relays, 10-30 VDC @ 200 mA see Appendix COMBUSTIBLES maximum & CO FREQUENCY & MULTIPLEX Supplied by MSA controllers VERSIONS...
  • Page 49 Chapter 3, Specifications Table 3-1. Performance Specifications COMBUSTIBLES 3-wire current source 4-20 mA OXYGEN & 2-wire current sink or 3-wire SIGNAL TOXICS current source OUTPUT FREQUENCY & MULTIPLEX 4-9 khz VERSIONS SIZE 9 x 6 x 5 inches (228.5 x 152.4 x 127 cm) PHYSICAL WEIGHT 4.5 pounds (2.041 kilograms)

  • Page 50: Chapter 4 Maintenance

    General The only routine maintenance item is the sensing element itself, which has a limited lifetime. When the Ultima Gas Monitor’s read-out indicates that the sensor must be changed, there is very little sensor lifetime remaining. It is good practice to obtain a replacement sensing element before the sensing element within your unit becomes inoperative.

  • Page 51: Caution

    See "Calibration" portion of Chapter 2 in this manual for calibration instructions. 1. To replace the sensor, remove power from the Ultima Monitor. "! WARNING Handle the sensor carefully; the electrochemical version is a sealed unit which contains a corrosive electrolyte.
  • Page 52 Chapter 4, Maintenance Figure 4-2. Cap for Catalytic Combustible Gas Explosion-proof Model Figure 4-3. Cap for Toxic Gas or Oxygen General-purpose Model...
  • Page 53 Chapter 4, Maintenance Figure 4-4. Cap for Toxic Gas, Oxygen, or Combustible IR Explosion-proof Model combustible versions, unscrew the gas-tight union [(if present) FIGURE 1-23]. 3. Identify the sensor element needed and obtain the same type of sensor element. 4. Toxic, Oxygen, or Combustible IR Sensors: Unplug the sensor by pulling it straight down;...

  • Page 54: Caution

    Use of the INITIAL calibration procedure upon installation of a new sensor ensures the Ultima Gas Monitor will perform a successful calibration. Failure to do so may result in a CAL FAULT reading (FIGURE 4-6).
  • Page 55 Hydrogen Cyanide (HCN), Hydrogen Chloride (HCL), and Sulphur Dioxide (SO ) only. The Ultima Series product line contains a sensor detection function to alert the user of a sensor disconnection problem by displaying "ERR 1" on the LCD display. " CAUTION...
  • Page 56 Chapter 4, Maintenance Table 4-1. Troubleshooting Guidelines SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION Display Invalid cell type. Replace or repair display board. flashes Err 2 Display Non-volatile memory not Cycle power or repair unit. flashes Err 3 detected. Non-volatile memory reset or not initialized Perform Initial Calibration.

  • Page 57: Obtaining Replacement Parts

    Failure to do so may seriously impair sensor performance. Repair or alteration of the Ultima Gas Monitor, beyond the scope of these maintenance instructions or by anyone other than authorized MSA service personnel, could cause the product...
  • Page 58 Chapter 4, Maintenance Table 4-2. Replacement Parts REPLACEMENT SENSOR KITS SENSOR KIT PART NO. 10018081 Phosphine, 2 ppm 10018082 Arsine, 2 ppm Silane, 25 ppm 10018083 10018084 Diborane, 50 ppm 10018085 Germane, 3 ppm Fluorine, 5 ppm 10012903 10012904 Bromine, 5ppm Carbon Monoxide, 100 ppm 813613 Carbon Monoxide, 500 ppm...
  • Page 59 Chapter 4, Maintenance Table 4-2. Replacement Parts 710224 Oxygen - Explosion-proof Oxygen - Explosion-proof - Duct Mount 710262 Hydrogen Sulfide - General Purpose 710222 Hydrogen Sulfide - General Purpose - Duct Mount 710260 SENSORGARD REPLACEMENT PARTS 710224 Hydrogen Sulfide - Explosion-proof Hydrogen Sulfide - Explosion-proof - Duct Mount 710262 Chlorine - General Purpose...
  • Page 60 Chapter 4, Maintenance Table 4-2. Replacement Parts 710222 Silane - General Purpose Silane - General Purpose - Duct Mount 710260 Silane - Explosion-proof 812074 SENSORGARD REPLACEMENT PARTS Silane - Explosion-proof - Duct Mount 710262 710222 Germane - General Purpose Germane - General Purpose - Duct Mount 710260 Germane - Explosion-proof 812074...

  • Page 61: Optional Ultima Duct Mount Kit

    • The sensor and the Kit are sealed to the duct to prevent gas within the duct from escaping. NOTE: The Ultima Duct Mount Kit will not fit the Ultima Gas Monitor with internal relays. • If relays are necessary, the Ultima Gas Monitor remote sensor must be used.

  • Page 62: Mounting

    • save valuable maintenance time and money • enhance calibrator safety. If moving an existing, installed Ultima Gas Monitor to a duct with a Duct Mount Kit, additional parts are necessary. Contact MSA to obtain the additional materials.

  • Page 63: Mounting The Single Module Model

    • Away from any fans or blowers. The Ultima Gas Monitor with Duct Mount Kit requires some assembly before mounting. It is necessary to temporarily remove the sensor from the module housing and install the sealing gaskets.

  • Page 64: Warning

    631357 655245 Quantity of 2 of 1/4 inch lock washers 4. Locate the Ultima Gas Monitor to be installed in the duct. 5. Unscrew the Ultima Gas Monitor cover and set aside. "! WARNING Before removing the cover of an explosion-proof Ultima Gas...
  • Page 65 Appendix A, Optional Ultima Duct Mount Kit Figure A-4. Ultima Gas Monitor Spacers Figure A-5. Ultima Gas Monitor Clamp Figure A-6. Ultima Gas Monitor Enclosure Gasket...
  • Page 66 • The termination printed circuit board remains in the enclosure. 8. For Toxic, Oxygen, or Combustible IR Ultima Gas Monitors: To disconnect the sensor wiring from the termination printed circuit board in the module, pull up on the connector inserted...
  • Page 67 Appendix A, Optional Ultima Duct Mount Kit Figure A-9. Toxic or Oxygen Ultima Gas Monitor Termination Board For Catalytic Combustible Ultima Gas Monitor: To disconnect the sensor wiring from the termination printed circuit board within the module, pull up on the connector inserted into TB2 (FIGURE 1-22).

  • Page 68: Warning

    16. Locate the Ultima Gas Monitor mounting bracket and two #10-32 X5/16 screws and lock washers. 17. Install the mounting bracket onto the back of the Ultima Gas Monitor via the two tapped holes with the two supplied screws; tighten the screws.
  • Page 69 Appendix A, Optional Ultima Duct Mount Kit Figure A-11. Duct Mount Sensor 24. Clean the area around the hole made in step 2, ensuring that no grease, metal shavings or other material is in the area where the gasket will be seated.

  • Page 70: Mounting The Dual Module Models

    Six 10-32 Screws 634054 Six #10 Lock Washers 627852 4. Locate the Remote sensor of the Ultima Gas Monitor to be installed in the duct. 5. Unscrew the cover of the Remote sensor and set aside. " WARNING Before removing the cover of an explosion-proof Remote...
  • Page 71 Appendix A, Optional Ultima Duct Mount Kit Figure A-12. Remote Sensor Spacers Figure A-13. Remote Sensor Clamp 6. For Toxic, Oxygen, or Combustible IR Remote Sensor Ultima Gas Monitors: To disconnect the sensor wiring on the termination printed circuit board in the module, pull up on the connector inserted into J1 (FIGURE 1-26).
  • Page 72 Appendix A, Optional Ultima Duct Mount Kit Figure A-14. Remote Sensor Base Plate 9. Place the enclosure plate and gasket from the Duct Mount Kit on the sensor body threads (FIGURE A-10). 10. Carefully feed the sensor wires from the sensor body back into the module opening.

  • Page 73: Warning

    • These screws pass through the bracket and into two tapped holes in the module. 17. Push the Remote sensor Ultima Gas Monitor through the slit gasket on the Duct Mount base plate (FIGURE A-15). 18. Fasten the sensor module bracket to the base plate using the #10-32 screws removed in step 15.
  • Page 74 Duct Mounting flange. 25. Install the entire assembly on the duct. Use proper fasteners to secure the Ultima Gas Monitor Duct Mount to the duct. 26. If necessary, tape or seal around the sensor gasket to prevent leaks.
  • Page 75 Appendix A, Optional Ultima Duct Mount Kit 28. Install the read-out module by following the mounting instructions in the instructions manual for the single module model. 29. Refer to the instruction manual for wiring details. A-15...

  • Page 76: Optional Ultima Power Supply

    Amps multiple non-combustible Ultima sensors Mounting The Ultima Power Supply can be mounted in Class I, Groups B, C and D, Division 1, Hazardous locations. 1. Locate the power supply module near the Ultima Gas Monitor. Orient the module so that the DC output is easily wired to the Ultima Gas Monitor.

  • Page 77: Warning

    6. Re-install the Ultima Power Supply cover. " WARNING Do not let the cover remain off of the Ultima Power Supply Module. Since a source of ignition is exposed, an explosion may occur if a metal object contacts the circuitry and...
  • Page 78 Appendix B, Optional Ultima Power Supply Module Figure B-2. Wiring Connections...

  • Page 79: Appendix C Internal Relay Option

    Similarly, the trouble relay de-energizes when a trouble condition is detected. The Ultima Duct Mount Kit will not fit the Ultima Gas Monitor with internal relays. • If internal relays are necessary, the Ultima Gas Monitor remote sensor must be used.
  • Page 80 Appendix C, Internal Relay Option Figure C-1. Dual module Ultima Wiring Harness Figure C-2. Single module Ultima Wiring Harness...

  • Page 81: Caution

    • These models must be installed according to the National Electric Code. • Some Ultima Gas Monitor enclosures are rated for Class I, Division 1, Groups B, C and D areas while others can only be used in Groups C and D areas.

  • Page 82: Relays

    Appendix C, Internal Relay Option Table C-1. Power Cable Distances for the Ultima Gas Monitor with Internal Relays (4-20 mA or Frequency Output Models) MAXIMUM LOAD POWER MAXIMUM RESISTANCE SENSOR TYPE SUPPLY WIRE SIZE CABLE LENGTH (mA OUTPUT VOLTAGE (IN FEET)

  • Page 83: Alarm Relays

    Appendix C, Internal Relay Option Alarm Relays There are two alarm relays and one fault relay in the Ultima Gas Monitor. The two alarm relays: • Activate when the Monitor detects a gas concentration level that activates Alarms 2 or 3 •...

  • Page 84: Optional Reset Push-Button

    • This may silence any alarm horns or turn OFF any equipment connected to the relays. • Latching relays can be configured on the Ultima Monitor via the Ultima Controller. Refer to the Ultima Controller manual (P/N 813379) for explicit instructions.

  • Page 85: Relay Connections

    Appendix C, Internal Relay Option area; otherwise, an explosion may occur, as sparks may be produced when the button is pressed. • The RESET push-button must be a normally-open type with a momentary contact when pushed. • The electrical ratings must be at least 1 amp at 250 volts AC. •...

  • Page 86: If The Wiring Harness Is Not Used

    BLACK FAULT If the Wiring Harness is Not Used: • The Ultima Gas Monitor must be disassembled for wiring • The wiring harness must be discarded • The following procedure must be performed: 1. Unscrew the Ultima Gas Monitor cover and set aside.
  • Page 87 Appendix C, Internal Relay Option 2. Remove the two screws securing the front label assembly (FIGURE 1-21). 3. Pull up and remove the front label assembly and the two attached printed circuit boards. 4. Pull on the wiring plugs to disconnect the connectors on the exposed board.

  • Page 88: Warning

    17. Re-install the cover of the Ultima Gas Monitor. "! WARNING Do not let the cover remain off of an explosion-proof Ultima 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.

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