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Single Gas Instrument Service Manual

Instruction 0019-9166

Bacharach, Inc.

Page

3. Connect the CO discharge hose of the calibration equipment to the Monoxor's probe tip; then

open the CO cylinder regulator valve and adjust the regulator for a

owmeter indication of 1

to 2 SCFH.

4. Allow gas to

ow for 2 minutes.

5. Read the detected CO level on the instrument’s LCD. Then using a potentiometer adjustment

tool, adjust the CO SPAN potentiometer until the LCD reading matches the gas cylinder’s

concentration value within ±5 ppm.

6. Shut off the regulator and remove the CO discharge hose from the gas inlet port. Then while

observing the displayed CO level, allow the instrument to run until the CO reading drops to

zero.

NOTE:

If after 5 minutes the CO reading stabilizes at some value other than zero, readjust the

ADJUST potentiometer for an LCD indica

tion of ±3 ppm.

7. Set front panel POWER switch to OFF.

8. Disassemble the calibration-equipment setup and store the components in the calibration kit’s

carrying case.

The presence of SO

and NO

gas in small amounts, and CO gas in larger amounts, can be very toxic.

Calibration at a Bacharach Sales/Service Center is recommended (See Section “5.4 Bacharach Sales/

Service Centers” to

nd the nearest center). If you have a facility that is properly equipped to handle

toxic gas (i.e.. fume hoods, self contained breathing apparatus etc.), we would be glad to suggest a

calibration method.

Figure 3-2.

ADJUST &

CO Span

Adjustments

3.2

Dioxor

, Monoxor II H CO, and Nonoxor NO

Calibration

Important!

Do not proceed with this calibration procedure if the instrument’s “LO BAT”

indicator is on. We recommend that the instrument be calibrated with a fresh set of batteries.

c. Wait until the instrument’s CO display settles down (approximately 1 minute); then, using

a potentiometer adjustment tool, turn the front panel ADJUST potentiometer (Fig 3-2) until

the display shows 0 ±3 ppm.

The display shows negative numbers for zeroing purposes.

Содержание Monoxor II

Страница 1: ...SERVICE MANUAL for DIOXOR II MONOXOR II MONOXOR II H High Range NONOXOR II Rev 7 May 2010 Bacharach Inc 621 Hunt Valley Circle New Kensington PA 15068 Phone 1 800 736 4666 Fax 724 334 5001 Web www mybacharach com Printed in the U S A ...

Страница 3: ...uit Board Replacement 10 2 6 ChamberAssembly Servicing 11 3 0 SENSOR CALIBRATION 12 3 1 Monoxer II CO Calibration 12 3 2 Dioxor II SO2 Monoxor II H CO and Nonoxor II NOx Calibration 13 4 0 TROUBLESHOOTING CHART 14 5 0 REPLACEMENT PARTS 17 5 1 Probe Assembly 17 5 2 Instrument Assembly 18 5 3 Miscellaneous Parts and Accessories 20 5 4 BACHARACH Sales Service Centers 20 ...

Страница 4: ...the same in this instruction Instrument maintenance which includes information on how to Open and close the case Clean the Fan Assembly and chamber assembly area Replace the sensor Replace the Printed Circuit Board P C B Service the gas sensing chamber assembly chamber assembly Sensor calibration Troubleshooting chart Replacement parts list GENERAL NOTE If excessive torque is applied to the instru...

Страница 5: ...ic strap over top of the instrument Fig 2 1 2 Slide off battery cover 3 Remove batteries 4 Using a No 1 Phillips head screwdriver remove the two screws from the rear of the case 5 Lift up the bottom portion of the rear case and slide it forward until the case clears the inlet port 6 To gain better access to the components remove the gas sensing chamber as sembly Chamber Assembly and the Printed Ci...

Страница 6: ...er the chamber assembly is in place 1 Ensure that the P C B is properly positioned face down over its locating tab on the front case Fig 2 2 2 Properly position the chamber assembly between the ribs of the front case 3 Slide the rear case over the inlet port and properly join the two case halves together 4 Secure the case halves to each other using the two screws removed in Sec tion 2 1 Step 4 Tig...

Страница 7: ...ving the two screws and nuts that secure the Chamber to the Motor Assembly Fig 2 3 NOTE Do not remove the Fan Assembly unless it s absolutely neces sary for cleaning or repair purposes 4 If it is necessary to remove the Fan Assembly first loosen the set screw on the Fan Assembly with the 05 in Allen wrench and then pull off the assem bly NOTE It is not necessary to disassemble the Motor Assembly I...

Страница 8: ...ing fully Tighten the set screw to approxi mately 32 40 ounce inches using the 05 in Allen wrench Spin the Fan Assembly to be sure it will run in the chamber b Mate and secure the Chamber and Motor Assembly together with the two screws and nuts removed in Step 3 Tighten to 16 20 oz in 8 Reinstall the Membrane mesh side toward the chamber assembly O ring and Sensor on the chamber assembly Fig 2 2 t...

Страница 9: ...that secure the Sensor to the chamber assembly then remove the Sensor along with its O ring and Membrane from the chamber assembly 4 Remove and discard of the old Sensor in accordance with local and federal regulations DO NOT discard the sensor s O ring and Membrane unless you intend to replace these items NOTE Replace the O ring if it looks deformed and replace the Membrane if it is contaminated ...

Страница 10: ...sensor connector from the P C B NOTE For SO2 CO Sensors only If the Sensor is not going to be immediately plugged into the new P C B place a shorting wire between sensor terminals R and S 4 Remove the Switch Covers from the old P C B and place them on the new P C B then replace the old P C B with the new one 5 Plug the motor connector into the P C B 6 Remove the shorting wire from sensor terminals...

Страница 11: ...the Sensor along with its O ring and Membrane from the chamber assembly 3 Using a No 1 Phillips head screwdriver disassemble the Chamber from the Motor Assembly Fig 2 3 4 To remove the Fan Assembly refer to Section 2 3 Step 4 5 If Motor replacement is required a Unplug the motor connector from the circuit board and discard the Motor Assembly b Install a new Motor Assembly and connect the motor con...

Страница 12: ...cedure WARNING Perform this procedure in a well ventilated area CO is toxic 1 Assemble the calibration equipment by connecting the Carbon Monoxide Gas Cylinder and the components of the Calibration Kit together as shown in Fig 3 1 NOTE DO NOT attach the calibration setup to the instrument at this time 2 Zero the instrument as follows a Ensure instrument will be sampling CO free fresh air in the fo...

Страница 13: ...anel POWER switch to OFF 8 Disassemble the calibration equipment setup and store the components in the calibration kit s carrying case The presence of SO2 and NOX gas in small amounts and CO gas in larger amounts can be very toxic Calibration at a Bacharach Sales Service Center is recommended See Section 5 4 Bacharach Sales Service Centers to find the nearest center If you have a facility that is ...

Страница 14: ...ute be fore switching on unit to allow its PTC resistor to cool Replace P C B Refer to Section 2 5 Printed Circuit Board Replacement Replace P C B Refer to Section 2 5 Printed Circuit Board Replacement Check Sensor connections Fig 2 2 Remove Sensor and replace its Membrane See Fig 2 2 Replace Sensor Refer to Section 2 4 Sensor Replace ment Replace P C B Refer to Section 2 5 Printed Circuit Board R...

Страница 15: ...r defective P C B defective Replace batteries with four fresh C Alkaline cells Break in a new Motor for at 30 minutes Replace Motor Assembly Refer to Section 2 6 Chamber Assembly Servicing Check Sensor connections See Fig 2 2 Replace Sensor Refer to Section 2 4 Sensor Replace ment Replace P C B Refer to Section 2 5 Printed Circuit Board Replacement Move unit into an area known to be gas free Unkin...

Страница 16: ...ons See Fig 2 2 Run Motor for at least 3 hours to wear away arc spots If display still bounces replace Motor Assembly Refer to Sec tion 2 6 Chamber Assembly Servicing Tighten screws Refer to Sec tion 2 6 Chamber Assembly Servicing Open chamber assembly and ensure that Fan blade Assem bly is mounted on Motor shaft Refer to Section 2 6 Chamber Assembly Servicing Clean ports Refer to Section 2 3 Clea...

Страница 17: ... not shown 0019 3104 2 Probe Tube 0019 3073 3 Probe Handle 0019 3017 4 Screw Phillips head M3 x 5 x 8 mm 0501 3806 5 Tubing 5 16 OD X 3 16 ID 0003 6109 6 Filter Saturator Bushing 0011 0074 7 Filter Packing 0011 0121 8 Filter Tube 0011 0130 9 Front Ferrule 0003 2024 10 Rear Ferrule 0003 2025 11 Knurled Nut 0003 2023 12 Compression Fitting 0003 2021 13 Barbed Fitting 0003 6164 14 Extended Adapter Bl...

Страница 18: ...11 O Ring and Membrane 0024 0520 12 Printed Circuit Board Assy Dioxor II 0019 3022 Printed Circuit Board Assy Monoxor II 0019 3012 Printed Circuit Board Assy Nonoxor II 0019 3020 Printed Circuit Board Assy Monoxor II H 0019 3094 13 PTC Resistor 0204 9427 14 Rear Case w Label Dioxor II 0019 3082 Rear Case w Label Monoxor II 0019 3053 Rear Case w Label Nonoxor II 0019 3081 Rear Case Monoxor II H ord...

Страница 19: ...Single Gas Instrument Service Manual Instruction 0019 9166 Bacharach Inc Page 19 Figure 5 3 Replacement Parts Back and Front Exploded Views ...

Страница 20: ...l Monoxor II H 0019 9180 Calibration Card 0019 9150 Service Manual This Manual 0019 9166 Label Carrying Case 0019 3077 Probe Stop for Securing Probe in a Flue or Stack 0024 0434 Warranty Card 0006 8825 5 3 Miscellaneous Parts and Accessories 5 4 BACHARACH Sales Service Centers United States Bacharach Inc 621 Hunt Valley Circle New Kensington PA 15068 Phone 724 334 5051 Fax 724 334 5723 E mail help...

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