MSA Toxgard II Instruction Manual

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 c omplex equipment, the unit will perform as designed o nly if it is ins talled, used a nd serviced in acc ordance 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 M SA International, dia l 1-412-967-3354.

This manual is available on the internet at www.msanet.com

Manufactured by

MSA NORTH AMERICA

P.O. Box 42 7, Pi tt sb ur gh, P ennsylvan ia 15230

(L) Rev 7 711266

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 instructions and/or recommendations. This warranty does not apply to expendable or consumable parts whose normal life expectancy is less than one (1) year such as, but not limited to, non-rechargeable batteries, sensor elements, filter, lamps, fuses etc. The Seller shall be released from all obligations under this warranty in the event repairs or modifications are made by persons other than its own or authorized service personnel or if the warranty claim results from physical abuse or misuse of the product. No agent, employee or representative of the Seller has any authority to bind the Seller to any affirmation, representation or warranty concerning the goods sold under this contract. Seller makes no warranty concerning components or accessories not manufactured by the Seller, but will pass on to the Purchaser all warranties of manufacturers of such components. THIS

WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED OR STATUTORY, AND IS STRICTLY LIMITED TO THE TERMS HEREOF. SELLER SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE.

2. Exclusive Remedy- It is expressly agreed that Purchaser’s sole and exclusive remedy for breach of the above warranty, for any tortious conduct of Seller, or for any other cause of action, shall be the repair and/or replacement at Seller’s option, of any equipment or parts thereof, which after examination by Seller is proven to be defective. Replacement equipment and/or parts will be provided at no cost to Purchaser, F.O.B. Seller’s Plant. Failure of Seller to successfully repair any nonconforming product shall not cause the remedy established hereby to fail of its essential purpose.

3. Exclusion of Consequential Damage- Purchaser specifically understands and agrees that under no circumstances will seller be liable to purchaser for economic, special, incidental or consequential damages or losses of any kind whatsoever, including but not limited to, loss of anticipated profits and any other loss caused by reason of nonoperation of the goods. This exclusion is applicable to claims for breach of warranty, tortious conduct or any other cause of action against seller.

WARNINGS

1. Each instrument described in this manual must be installed, operated and maintained in strict accordance with its labels, cautions, warnings, instructions, and within the limitations stated.

2. These monitors must not be installed in areas or locations where explosive concentrations of combustible gases or vapors might occur in the atmosphere: Class 1, Group A, B, C, and D areas as defined by the NEC. Since the monitors are not explosion-proof, they must be located in non-hazardous areas.

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. Neither will it indicate the presence of explosive or combustible mists or sprays, lubrication oils, nor explosive dusts, such as grain or coal dust.

4. As with all gas detection instruments of this type, high levels of or long exposure to certain compounds - all of which are not known, will contaminate the sensor. Calibrate the monitor frequently to ensure that system operation is dependable and its indications accurate.

5. The Toxgard II monitor must not be painted. Also, painting should not be done near the sample line inlet. If painting is being done in an area where the sample line inlet is located, care must be exercised to make sure that paint is not deposited on the sample inlet fitting of the monitor. Such paint deposits would interfere with the sampling process, whereby a sample of the atmosphere being monitored is drawn into the Toxgard II unit.

6. The only absolute method to ensure proper overall operation of a gas detection instrument is to check it with a known concentration of the gas for which it has been calibrated. Consequently, a calibration check should be included as part of the routine inspection of the system.

7. The sensor is a sealed unit which contains an electrolyte. Should the sensor develop leakage, it should be immediately removed from the sensing head and properly discarded in accordance with local, state and federal laws. To obtain a replacement sensor, contact MSA at the address given in Chapter 5, "Obtaining Replacement Parts." Caution must be exercised so that the electrolyte does not contact skin eyes, clothing or circuitry. Get immediate medical attention if electrolyte contacts skin or eyes.

8. Perform periodic leak check on the sample line and all flow system components and fittings of the Toxgard II monitor.

9. Use only genuine MSA replacement parts when performing any maintenance procedures provided in this manual. Failure to do so may seriously impair instrument performance. Repair or alteration of the Toxgard II unit, beyond the scope of these maintenance instructions, or by anyone other than an authorized MSA serviceman, could cause the product to fail to perform as designed, and persons who rely on this product for their safety could sustain severe personal injury or death.

10. Properly vent the exhaust of the Toxgard II monitor to a safe area. Improper venting of the exhaust can cause personal injury or death.

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.

13. Do not mix units with different area classifications. All units used in a classified area must have the proper area classification. Otherwise, an explosion hazard exists, resulting in possible explosion, injury or death.

FAILUR E TO CO MP LY WITH T HE ABOVE WARNI N GS CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH.

Table of Contents

Chapter 1

Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Unpacking Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Figure 1-1. Toxgard II Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Identifying Your Uni t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Figure 1-2. Remote Sensor Model . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Figure 1-3. Shipping Carton Label Identifying Se nsor Type . . . . . . . . 1-3

Mounting Your Gas M oni t or . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

" WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Figure 1-4. Options and Accessories (Battery Back- up not shown) . . 1-4

" CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Gas Sampling Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

The Toxgard II Pump or Aspirator Model: . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Table 1-1. Performance Specifications

for Toxgard II Pump or Aspirator Model . . . . . . . . . . . . . . . . . 1-6

" WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Installation of DC Pump or Aspirator Sampling . . . . . . . . . . . . . . . . . . . . . 1-6

Sample Line Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Exhaust Line Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Blocked Flow Detection of Sample Line . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Mounting the Air-lin e Toxgard II Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

" WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

" CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Flow Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Mounting the Toxgar d I I Remot e S en sor Mod ule . . . . . . . . . . . . . . . . . . . 1-9

Electrical Connections for Toxgard II Monitors . . . . . . . . . . . . . . . . . . . . 1-10

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 0

" CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Figure 1-5. Remote Sensor Mounting Method . . . . . . . . . . . . . . . . . 1-10

" CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

TOC-1

Table of Contents

Figure 1-6. Toxgard II Cable Entries . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Rela ys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Rela y Spe cifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Tab le 1-2. Relay S p ecifica ti o ns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Alarm Rel a y s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Alarm Feature s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Fau lt Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Horn Relay/Audible Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Audible Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Horn Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Rela y Wiri n g w ith Inductive L oads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Milliamp Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Figure 1-7. Standard 4-20 mA Terminal W iring . . . . . . . . . . . . . . . . 1-14

Isolated 4-20 mA Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

For Signal Loads Less T han 50 Oh ms : . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

For Signal Loads G rea ter Tha n or Equal to 50 Ohms: . . . . . . . . . . . . . . 1-15

Under Line -pow ered Cond itio n s : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Under Battery-po were d C ondit i ons: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Digital Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Visual Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Horn/Alarm Ackno w le dge But t on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Remote Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Electrical Connect ions for the Remote S ensor Module . . . . . . . . . . . . . 1-16

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

" CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

For Combustible M odel s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

Table 1-3. Wire Gauge Vs. Distance Between Units . . . . . . . . . . . . . 1-17

Table 1-4. Remote C ombustible Sensor Wiring Ca ble . . . . . . . . . . . . 1-18

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

Figure 1-8. Combustible Remote Sensor . . . . . . . . . . . . . . . . . . . . . 1-18

Figure 1-9. Oxygen Remote Sensor Cable . . . . . . . . . . . . . . . . . . . 1-19

Figure 1-10. Oxygen and Toxic Remote Sensor . . . . . . . . . . . . . . . . 1-19

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

TOC-2

Table of Contents

Oxygen Remote Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 0

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1

Toxic Gas Remote Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

Figure 1- 1 1 . Toxic Gas Remote Se n so r Cab l e . . . . . . . . . . . . . . . . . . 1-21

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2

Pump Wiri n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

Dip S witch Sett ings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 -2 2

Tab le 1-5. SW2 S witch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 -2 3

Figure 1-12. Pump Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Tab le 1-6. SW3 S witch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 -2 4

Controller/Calibrator Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Internal Push-buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

View ing Co n figuration Pa rame ters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 -2 5

Table 1-7. Parameters Displayed During MODE Push-button Operation 1-26

Changing Parameter Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

Method 1 - Push-but tons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

Method 2 - Ultima Cont roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

Batt e ry Bac k u p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 8

Table 1-8. Expect ed Bat t ery Op era ting Time at 77

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 0

Banshee Horn Audibl e Set t ings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

Figure 1-13. Banshee Horn Audible Settings . . . . . . . . . . . . . . . . . . . 1-31

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2

Autocalibration Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32

Duct-Mounted Remote Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . 1-32

F . . . . . . . . . . . . 1 - 3 0

Chapter 2

Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Initial Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Figure 2-1. Gas Concentration Display . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Figure 2-2. Calibration Flag Display . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

" CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

TOC-3

Table of Contents

" CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Non-combust ible Ch em ical s th at Re duce Sensor Sensiti vity . . . . . . . . . . 2-4

Cali b rato r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Toxgard II Monitor Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-3. Ultima Figure 2-4. Ultima

Table 2-1. Sensor Res pons e to Inter f era nts . . . . . . . . . . . . . . . . . . . . . 2-5

Toxgard II Monitor Calibration Output Signal . . . . . . . . . . . . . . . . . . . . . . 2-6

Calibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Chapter 3

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Table 3-1. Factory-set Span Values . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Calibration Kits 40 and 42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Calibration Kits 41 and 43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Span Gas Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

" CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Toxgard II Gas Monitor Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Figure 3-1. Calibrati on Ki t 40 Cont ent s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Figure 3-2. Calibrati on Ki t 41 Cont ent s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Figure 3-3. Calibrati on Ki t 42 Cont ent s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 3-4. Calibrati on Ki t 43 Cont ent s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Cali b ratio n Doc u menta tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

To Zero the Toxgard II Gas Monitor Only . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Procedure Number 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-5. Zero Cap Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-6. Calibration Tubing Set-up . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-7. Zero Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-8. Apply Zero Gas Flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Figure 3- 9 . Ca libration E n d Display . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Figure 3- 1 0 . Calibrati o n F aul t F l a g . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Procedure Number 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Figure 3- 1 1 . Zero Cap Placem e nt . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

TOC-4

Table of Contents

Figure 3-12. Zero Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Perform a Complete Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Procedure Number 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Zero i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Spanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Figure 3-13. Apply SPAN Gas Flag . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Figure 3-14. Span Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Figure 3- 1 5 . Calibrati o n E n d Displa y . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1 8

Figure 3-16. Span Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

Procedure Number 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Zero i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Spanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

OXYGEN Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

25% Oxygen Toxgard II Gas Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

INITIAL Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

Toxgard II Airline Monit or, Pum ped Version and Aspirat ed Ver si on

Cali b ratio n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Cali b ratio n Proc edur e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 5

Figure 3-17. Typical DC Pump Version Installation . . . . . . . . . . . . . . 3-26

Figure 3-18. Typical Air Aspirator Version Installation . . . . . . . . . . . . 3-26

Zero Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

Figure 3- 1 9 . Typical Ai r L ine Mo nitor Ins t a llati o n . . . . . . . . . . . . . . . . 3-2 7

Chapter 4

Specificat ions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Table 4-1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

"!WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Chapter 5

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Corrective Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Sensor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

" WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

" CAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

TOC-5

Table of Contents

Figure 5-1. Change Sensor Flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Figure 5-2. Cap Location for Remote Combustible Gas Explosion-proof

Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Figure 5-3. Cap Location for Toxic Gas or Oxygen Gen era l-purpose

Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

"!CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Figure 5-4. Cap Location for Remote Toxic Gas or Oxy gen

Explosion-proof Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Figure 5-5. Combustible Three-Pin Connector . . . . . . . . . . . . . . . . . . 5-5

Figure 5-6. CAL FAULT Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Table 5-1. Troubles hooti ng G uidelines . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Obtaining Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Table 5-2. Replacement Sensor Kits . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Tab le 5-3. S p a re Pa rts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Appendix A

Optional Duct Mount Kit . . . . . . . . . . . . . . . . . . . . . A-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Figure A-1. Ultima Duct Mount Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Figure A-2. Duct Template . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Table A-1. Dual mo dule D uct M ount Ki t Part s Li st . . . . . . . . . . . . . . . . A-4

Figure A-3. Remote Sensor Spacers . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Figure A-4. Remote Sensor Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Figure A-5. Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

" WAR NING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Figure A-6. Remote Sensor Base Plate . . . . . . . . . . . . . . . . . . . . . . . A-6

Figure A-7. Duct Mount and Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

Appendix B

Definitions of Terms . . . . . . . . . . . . . . . . . . . . . . . . B-1

TOC-6

Chapter 1, Set-up

Chapter 1 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).

If your unit is a Toxgard II Monitor with Digital Output, there will be an additional manual (P/N 711203)

• Toxgard II Remote Sensor Module, if ordered as a Remote Sensor model (FIGURE 1-2)

1. Remove the Toxgard II unit from its shipping container(s), taking care not to damage sensitive electrical components.

2. Search through the packing material and the containers to avoid discarding valuable parts.

Initial Inspection

1. Turn the coin slot lock 1/4-turn clockwise and open the door or use the key for the key lock, if so equipped.

2. Carefully inspect the components and assemblies inside the case. If damage or shortage is noted, advise the carrier promptly; make the proper claim with the carrier.

General Description

The Toxgard II Monitor is an easy -to-use, low-cost, one-sensor monitor. It is designed to sample t he environment where the monitor is mounted and to alert y ou to potentially dangerous levels of one of the following gases , depending on your particular model:

• Combust ible gas • Hydrog en Cyanide

• Oxygen • Hydrog en Chloride

• Carbon Monoxide • Nitric Oxid e

• Hydrog en Sulfide • Nitrogen Dioxide

• Chlorine • Sulfur Dioxide

• Chlorine Dioxide

1-1

Chapter 1, Set-up

1-2

Figure 1-1.

Toxgard II Monitor

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.

Identifying Your Unit

To determine your model type and other inst alled options (FIGURES 1-1 and 1-4), check the ID label on the shipping carton (FIGURE 1-3). This label identifies :

• target gas, sensor location and range

• s ampling accessories (if applicable)

• visual and audible alarm options

• output accessories

• m ounting hardware.

Figure 1-3.

Shipping Carton Label Identifying Sensor Type

1-3

Chapter 1, Set-up

Options and Accessories (Battery Back-up not shown)

Figure 1-4.

Mounting Your Gas Monitor

Generally, the unit or the r emote sensing module should be mounted close to the area where a leak is likely to occur or where the gas is expected. The Toxgar d II Monitor or Remote Sensing Module should be installed at a high level (ceiling), breathing level or low level (floor), depending on the density of the gas being monitored. Mount the unit so that the front display is not blocked or hidden from v iew.

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.

The general-purpose Toxgard II Monitor can be a source of ignition and must not be mounted in an area where a flammable mixture of combustible gas and air may be present; otherwise, an explosion may occur.

1-4

Chapter 1, Set-up

Mount the Toxgard II Monitor or the Remote Sensing Module with its sensor inlet fitting (FIGURE 1-1 or 1-2) pointed downwards; otherw ise, 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 depos ited on the sensor inlet f itti ng. Suc h pain t depos its would interfere with the diffusion process, whereby a sample of the monitore d atmosph ere di ffuses in to the s ensor. Failu re to follow the ab ove can result in serious per sonal injur y or death.

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.

Ventilation patterns must be established bef ore positioning the Toxgard II unit or sensor assembly. Smoke tubes (P/N 458481) are useful in measuring the direction and r ate of air flow to determine areas where the gas of int erest may tend to accumulate.

Using suitable hardware (not supplied), m ount the Toxgard II monitor to any flat surface v ia its four mounting lugs (see FIGURE 1-6). Allow sufficient room t o open the unit front door.

The Toxgard II unit is designed to meet NEMA 4X requirements, suitable for many damp, wet and/or outdoor locations.

Gas Sampling Options

Although the Toxgard II unit norm ally operates in the diffusion mode (i.e., gases or vapors to be detected enter the sensor input by natural molecular diffusion), a sam ple can be drawn into the instrument if the DC pump or air aspirator option was purchased.

The Toxgard II P ump or Aspirator Model:

• dr aws a gas sample from the monitored area, through a sample line (available separately) to the Toxgard II Gas Monitor sensor

• samples areas that are remote, inaccessible, too hot or too cold for direct sensor monitoring, such as:

• ducts carrying combustible or toxic gas

• wet wells

• printing drying ovens

• blanking or inerting operations

• has electronics physically located in the main monitor enclosure

(FIGURE 1-1)

1-5

Chapter 1, Set-up

• c omes equipped with a special flow cap for use on the Toxgard II Gas Monitor to ensure proper sensor sampling.

• pr ov ides notification via the Toxgard II Monitor LED display and fault relays if a flow fault is detected.

Table 1-1. Performance Specifications

for Toxgard II Pump or Aspirator Model

SAMPLE TRANSPORT TIME

NOMINAL SAMPLE FLOW RATE

MINIM UM SAMPLE FLOW RATE

MAXIMU M SAMPLE TUBING LENGTH

MAXIMUM EXHAUST TUBING LENGTH

INLET FITTINGS EXHAUST FITTING

Only Remote Sensors with proper area ratings can be used in a hazardous ar ea. The Toxgard II Monitor cannot be installed in a hazardous area. Otherwise, an explosion hazard will exist resulting is a possible explosion, injury or death.

30 seconds at 0.5 lpm with 50 feet (15.25 meters) of .180 (4.57 mm) ID sample t ubing

2 CFH (1 LPM)

1 CFH (.500 LPM) 100 feet (30 meters); 3/16 " ID (4.76 mm)

25 feet (7.5 meters) maximum for Chlorine, Nitrogen Dioxide and Chlorine Dioxide

20 feet (6 meters)

1/4" (6.35 mm) OD Tube Fitting 1/4" (6.35 mm) OD Tube Fitting

WARNING

Installation of DC Pump or Aspirator Sampling

Sample Line Placement

• Remove all protective packaging plugs and/or caps from gas INLET, CALIBRATION and EXHAUST PORTS.

• In-line filter must be used in the sample line.

• M SA tubing is available (P/N 600771).

The pump or aspirator draws a gas sam ple to the Toxgard II Gas Monitor sensor (FIGURE 1-1):

• Can be extended up to 100 feet (30 Meters) away from the Toxgard II Gas Monitor.

1-6

Chapter 1, Set-up

• Us es 1/4-inch (6.35 mm) OD tubing. The tubing must be compatible with the sampled gas. Sample tubing must also be 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.

• It is generally good practice to make the sample line as

short as possible.

• Depending on the gas characteristics, the end of the sampling tubing and the sample inlet should be mounted to best optimize sampling of that particular gas. Consult your architect, facility manager or safety engineer for guidance in proper placement of the sampling tube inlet.

• Testing for ventilation patterns is useful in establishing sample inlet location. Smoke tubes (P/N 458481) are useful in measuring the direction and rate of air flow to determine which areas to monitor.

• A particulate filter (purchased separately) should be used at the inlet end of the sample line to help prevent dirt and dust from clogging the sample line. This filter must be compatible with the gas being sampled.

• It is recommended that a stainless steel or Teflon* sample line be used for monitoring gases that are highly reactive such as:

• Nitrogen Dioxide

• Sulfur Dioxide.

• Use only a Teflon sample line for the following gases:

• Chlorine

• Chlorine Dioxide

• Hydrogen Chloride

• Ammonia.

• Wit h the above gases, do not use an end-of-line filter. The

sample line should be inspected periodically and replaced if dirty. Do not attempt to clean the sample line by applying compressed air.

NOTE: Do not run the sample tubing in water or across

areas of vibration, doorways, man ways or access ways; otherwise, a sample tubing leak or tripping hazard may result.

4. Using suitable hardware (not supplied):

1-7

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.

5. Install the end-of-line filter at the end of the sampling tubing.

6. Check for leaks along the entire length of the sample tubing line. Any leak will dilute the gas sample from the area of interest and give a lower than actual gas reading.

Exhaust Line Placement

1. For DC pump only: Attach 1/4-inch (6.35 mm) OD sample tubing

to the exhaust outlet fitting.

For Aspirated systems only:

Attach 3/8-inch (9.52 mm) OD sample tubing to the exhaust outlet fitting.

2. Route the exhaust tubi ng into a safe are a where the gas sample can be vent ed. Avoid an y sharp bends or elbows. Route the tubing to all ow any col lected water to drain.

• The maximum exhaust tubing length is 20 feet (6 meters). NOTE: Do not run the exhaust tubing in water or across

areas of vibration or across doorways, man ways or access ways; otherwise, a leak in the exhaust tubing or a tripping hazard may result.

3. Fasten the exhaust tubing to supports using suitable hardware (not supplied).

4. Fasten the end of the exhaust tubing in the area of interest by using suitable hardware (not supplied).

• Exhaust inlet should be pointed downward to prevent dirt

and water from entering the exhaust tubing line.

NOTE: Exhaust to a safe or non-hazardous area only.

5. Check for leaks along entire length of the exhaust tubing line.

1-8

Chapter 1, Set-up

Blocked Flow Detection of Sample Line

Units equipped with the pump or air aspir ator options are supplied with a flow detector. This f low detector activates the fault relay when insufficient flow exis ts for proper gas detection.

Mounting the Air-line Toxgard II Monitor

WARNING

These units must not be located in areas which may contain a flammable mixture of gas and air; otherwise, an explosi on m ay occur.

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; allow room to open the door.

2. Connect the source of compressed air being monitored to the pressure regulator (fittings not included). Install the regulator as close as possible to the sample take-off.

• The maximum regulator inlet pressure is 300 PSI.

• The regulator outlet pressure should be set to a nominal

10 PSI.

NOTE: An in-line filter trap (P/N 626967 or equivalent) is

recommended to prevent clogging of the flow system due to air line contamination, such as oil, dirt or moisture.

CAUTION

Do not exceed 300 pounds maximum inlet pressure; otherwise, damage to the unit may occur.

3. Ensure the pressure regulator is fully counter-clockwise to reduce the initial pressure to the unit.

Flow Block

The Toxgard II Monitor equipped with the flow block option can be used to allow a sample to be deliver ed from a pressurized stream to the Toxgard II unit. Inlet pressure to the flow block should not exceed 10 PSI.

Mounting the Toxgard II Rem ote Sensor Module

The Remote Sensor Module:

1-9

Chapter 1, Set-up

• is mounted where the gas is expected to exist

• is mounted with the sensor pointing downward via the 3/4" NPT threads located on the end of the module, opposite the sensor

• can also be mounted with the mounting strap (P/N

655700); see FIGURE 1-5

• wiring is routed to the Toxgard II Monitor.

Permanently connect 3/8" OD tubing to the center post of the sensor inlet. Route this tubing to the Toxgard II Monitor, ensuring there are no kinks, leaks or other obstructions. Secure this tubing near the monitor; it is used to deliver check gas to the s ensor module during calibration.

Remote Sensor Mounting Method

Figure 1-5.

Electrical Connections for Toxgard II Monitors

• Rec ommended wire is three-conductor, 16 gauge (12 gauge maximum).

• Install an external switch or circuit breaker close to the unit for disconnection purposes.

• Install an over-current protection device (e.g., fuse) in the supply wiring to the unit; two-amp, slow acting fuses are recommended.

WARNING

Before wiring the Toxgard II Monitor, disconnect power source suppl ying the monit or; otherwi se, electri cal shock coul d occur.

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.

NOTE: For Toxgard II with Digital Output Monitors, see

manual (P/N 711203) for wiring instructions.

1-10

Chapter 1, Set-up

Figure 1-6.

Toxgard II Cable Entries

• Route power, ground, and (where applicable) signal wiring through the electrical entry holes in the case (FIGURE 1-6).

• S epar ate 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).

CAUTION

If unsure of the power supply voltage available, contact your plant engineer or safety officer. Damage may occur to the instrument if the wrong power supply voltage is applied to the instrument.

1-11

Chapter 1, Set-up

Outputs

Relays

Relay Specifications

Table 1-2. Relay Specifications

3 ALARMS

RELAYS

RELAY RATINGS

FAULT (NORMALLY-ENERGIZED)

HORN RELAY At 125 or 250 VOLTS AC,

NON-INDUCTIVE AT 30 VOLTS DC,

NON-INDUCTIVE AT 1/10 HP

Alarm Relays

There are three alarm relays, a fault relay and a horn relay in the Toxgard II Gas Monitor.

NOTE: Alarms are automatically disabled at the following

times to avoid "nuisance" alarms:

• during first minute of power-up, while cell stabilizes

• during calibration and for two minutes

following calibration.

SPDT (S ingle pole, do uble throw) SPDT (S ingle pole, do uble throw) SPST (Single pole, single throw), N/O

5.0 Amps

Alarm Features

There are alarm levels in the Toxgard II unit, and a relay for each level. There are many user-select able alarm features enabled or disabled by selecting or de-selecting them.

• Relays are standard electromechanical devices chosen for long life and high reliability.

• Relay contacts are brought out to the terminal block and used to control external lights, horns, and other equipment (FIGURE 1-6).

• Alarms generally default to 10, 20 and 30% of the full-scale reading and are set when the gas reading is above these values.

• The Oxygen Model is a special case where:

• Caution is set to 19.5%, negative acting

• Warning is set to 18% oxygen, negative acting

• A lar m is set to 22% oxygen, positive acting.

1-12

Chapter 1, Set-up

• These default setpoints are factory-set. The user can change these setpoints; see Chapter 1, "Changing Parameter Settings."

• A r e available as N/O (normally-open) or N/C (normally-closed) contacts.

• For Normally-Open contacts:

• Upon activation, the relay contacts close to provide an

electrical path. These contacts remain closed as long as:

• The alarm condition exists within the Monitor or

• The latching mode is selected and the RESET

button has not been pushed.

• For Normally-Closed contacts :

• Upon activation, the relay contacts open to interrupt the

electrical path. These contacts remain open as long as:

• The alarm condition exists within the Toxgard II Gas Monitor or

• The latching mode is selected and the RESET button has not been pushed.

• S ee Chapter 1, "Dip Switch Settings" to determine the dip switch settings for the other alarm options.

Fault Relay

• During normal operation, the Fault relay is energized.

• When a fault is detected or power is cut or turned OFF, the

relay changes state. The form C contact can be wired as either normally-open (NO) or normally-closed (NC) for your needs.

• See the Chapter 5, TABLE 5-1, Troubleshooting Guidelines for causes of faults.

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)

• Adjustable-Tone Banshee Horn - 95 db at five feet

(See Chapter 1, "Banshee Horn Audible Settings").

• The Audible Alarm sounds when the Toxgard II Monitor enters a Fault or Alarm State, if that option is enabled (see TABLE 1-5)

• These options are factory- set at time of purchase.

1-13

Chapter 1, Set-up

Horn Relay

• This Single-pole, single-throw (SPST), normally-open (N/O) relay works in parallel with the instrument horn.

• These contac ts are open when the instrument horn is OFF or not selected for operation [see FIGURE 1-6 for terminal block (TB9) location].

• The contacts:

• close when the instrument horn activates

• remain closed until the horn is de-activated due to:

• elimination of the hazardous condition

• pres sing the HORN ACKNOWLEDGE button.

Relay Wiring with Inductive Loads

If you are connecting the relay s to motors, fluorescent lighting or other inductive loads, it is nec essary to suppress any spar ks that may occur at the relay cont act. These sparks will deteriorate or destroy the relay contacts, rendering the relay inoperative or useless. 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 si gnals such as the:

• M SA Model 5000 Monitor

• M SA Quad Gas unit

• P r ogrammable controllers

• DCS ’s , etc.

The standard unit is supplied with a non-isolated, 4-20 mA signal. An isolated 4-20 mA output option is als o available.

Figure 1-7.

Standard 4-20 mA Terminal Wiring

1-14

Chapter 1, Set-up

NOTE: The return path for this signal is connected to the

Toxgard II Monitor "analog common" circuitry, and therefore, is not "isolated." The Toxgard II Monitor can be ordered from MSA with an optional current isolator module which fully isolates the instrument from supplementary instrumentation.

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.

For Signal Loads Less Than 50 Ohms:

• The user load connects to the isolator output (S) and (-) terminals.

For Signal Loads Greater Than or Equal to 50 Ohms:

• The user load connects to the isolator output (+) and (-) terminals.

Under Line-powered Conditions:

• The Toxgard II isolated current output can drive a maximum load of 310 ohms (including wire).

Under Battery-powered Conditions:

• The Toxgard II isolated current output is limited to a maximum load of 100 ohms.

Digital Output

The Toxgard II Monitor can be used as part of a Ultima Plus high-speed digital network in order to report all internal parameters to a central location. All that is additionally required if this option is selected, is a net work communications board and a twisted-pair connection to the networ k. See Ultima Plus instructions for complete information conc erning this option.

WARNING

Since t he Toxg ard I I M onit or i s ty pi call y us ed a s a saf ety ins tru ment , it is rec ommen ded that the sta ndar d and op tiona l output s be use d in the pr oper manner ; otherwise, t he user may not be not ified of a condition that may not be considered normal.

Make w iring co nnect ions and c ondui t runs ac cordi ng to ac cepted commercial wiring practices. Install the Toxgard II unit in compliance

1-15

Chapter 1, Set-up

with the applicable requirements of the National Electrical Code and/or any other local code requirements.

Visual Outputs

The unit comes equipped with the following vis ual alarms:

• front-panel LEDs for Fault, Caution and Warning (standard):

• Latched Alarms cause the front-panel LED to flash

• Unlatched Alarms cause the front-panel LED to turn ON.

Also, up to two top-mounted strobes can be added (optional):

• am ber (follows Warning settings)

• red (follows Alarm settings)

Wiring for these options is fact ory-performed at time of purchase.

Horn/Alarm Acknowledge Button

• A reset push-button is mounted on the enclosure exterior.

• A n internally-mounted terminal strip allows the user to wire an

external reset button.

• The reset button silences the audio horn and resets any latched relays or alarms with alarm setpoints no longer exceeded.

• The reset button silences the horn but not the beacon(s) when the alarms are latched and the gas concentration is still above the alarm setpoint.

If installing a RESET push-button:

1. Route a two-conductor cable to terminal block TB13.

• Route this cable with DC power to avoid noise interference from relay wiring.

2. Connect the two-conductor cable to the two positions of the N/O momentary switch.

3. Identify the cable to enable proper connection at the button.

4. Route the cable to the push-button location; wire the button.

Remote Sensors

Electrical Connections for the Remote Sensor Module

Before wiring the Toxgard II Remote Sensor Module, disconnect the power source feeding the Remote Sensor Module and the Toxgard

1-16

WARNING

Chapter 1, Set-up

II Monitor/Less Sensor; otherwise, electrical shock could occur. Before removing the cover of an explosion-proof Toxgard II Remote Sensor Module, 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 ob ject contact s the circuit ry and produc es sparks.

Toxgard II Remote Sensor Modules (excluding t he combustible models) are supplied with 50 feet of cable. This cable has a connector on one end which plugs into its mate within the Toxgard II Monitor/Less Sensor. T he other end of the cable can be cut to the exact length needed.

The combustible Remote Sensor Module is wired with a three-conductor cable. This cable c an be acquired locally. Terminal strips within the Remote Sensor M odule and the Toxgard II Monitor/Less Sensor per mit easy wiring of this cable.

CAUTION

When installi ng a Toxgard II Rem ote Sensor M odule with its mati ng Toxgar d I I Mon i to r /L e s s Sensor, fo ll o w Na t ional Electrical and local proced ural Code s; fail ure t o do so ca n re sult i n a n uns afe cond iti on .

Maximum distance between the Toxgard II Remote Sensor and the Monitor is 50 feet. Do not splice additional cable to the supplied cable or run more than 50 feet of user-supplied cable.

For Combustible Models

Locate/acquire the proper length of three-conductor cable. TABLE 1-3 shows recommended wire gauge for the dis tance between the Remote Sensor and the Toxgard II Monitor/Less Sensor.

Table 1-3. Wire Gauge Vs. Distance Between Units

DISTANCE WIRE GAUGE

UP TO 15 FEET 16 AWG UP TO 25 FEET 14 AWG UP TO 50 FEET 12 AWG

TABLE 1-4 lists several suppliers of 12-AWG cable. If there is a possibility of electrical interf erence from external sources (such as large motors, welders, electrical heaters, etc.) use shielded cable.

The preferred colors of conductor s within the cable are black ( K), green (G) and white (W). If splices are necessary, solder and insulate each conductor; then, wrap ent ire splice with suitable electrical tape or covering. Do not use wire nuts or fasteners.

1-17

Chapter 1, Set-up

Table 1-4. Remote Combustible Sensor Wiring Cable

THE FOLLOWING CABLES ARE THREE-CONDUCTOR, 12-AWG SHIELDED, .625" OD

CABLE SUPPLIERS CATALOG NUMBER

CAROL CABLE CO. ALPHA WIRE CORP. BELDEN WIRE & CABLE CO .

02725

1937/3

19206

Appropriate wiring conduit must be us ed 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. Open the unit.

2. Locate TB2 in the upper-right portion of the main (lower) pc board.

3. Install wires onto positions 1, 2 and 3, noting the color used on each position.

At the Toxgard II Remote Sensor Location (FIGURES 1-8, 1-9 and 1-10)

1. Unscrew and open the Toxgard II Remote Sensor cover.

WARNING

Before removing the cover of an explosion-proof Toxgard II 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; otherwise, an explosion may occur if a metal object contacts the circuitry and produces sparks.

1-18

Figure 1-8.

Combustible Remote Sensor

Figure 1-9.

Oxygen Remote Sensor Cable

Chapter 1, Set-up

Figure 1-10.

Oxygen and Toxic Remote Sensor

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

NOTE: Separate the power and ground wiring from any

signal wiring.

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.

If shielded wire is used:

• Cut the shield wire short.

• Do not connect the shield at the remote sensor.

1-19

Chapter 1, Set-up

4. Screw the conduit into the conduit opening and relieve any excess slack in the cable.

5. Re-install the cover of the Toxgard II Remote Sensor.

WARNING

Do not allow the cover to remain off of an explosion-proof Toxgard II Sens or. si nce a sourc e of ig nitio n is expose d, an explo sion may occur if a metal object contacts the circuitry and produces sparks in an atm osphere of co mbustible ga s.

Oxygen Remo te Sensor Wiring

Fifty feet of four-conductor c able 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 t he cable can be cut to the exact length needed. Do not run more than 50 feet of cable or splic e on any additional cable.

At the Toxgard II Monitor/Less Sensor Location

The cable connects to J5 at t he upper right portion of the (lower) main pc board.

At the Toxgard II Remote Oxygen Sensor Location

1. Unscrew and open the Toxgard II Remote Sensor cover.

WARNING

2. Route Toxgard II Monitor cable through the conduit opening and wire it to the terminal block in sensor bottom.

3. Verify the identity of each conductor cable and connect the wire to the terminal block (FIGURE 1-9).

Note that there are four wires needed out of the six within the cable. Use the markings on the conductors at the end of the original cable or see FIGURE 1-9 for the colors of the wires that are needed.

CONDUCTOR ID

WHITE WITH BLUE WHITE WITH G REEN GREEN WITH WHIT E BLUE WITH WHITE

TERMINAL BLOCK

LOCATION

3 5 6 8

1-20

+ 69 hidden pages

MSA Toxgard II Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual