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RKI Instruments GasWatch 3 Operator's Manual

Carbon monoxide and oxygen
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GasWatch 3 for
Carbon Monoxide and Oxygen
Operator's Manual
Part Number: 71-0513
Revision: P1
Released: 2/13/20
www.rkiinstruments.com

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Summary of Contents for RKI Instruments GasWatch 3

  • Page 1 GasWatch 3 for Carbon Monoxide and Oxygen Operator’s Manual Part Number: 71-0513 Revision: P1 Released: 2/13/20 www.rkiinstruments.com...
  • Page 2 Mode. The instrument does not need to be calibrated unless it does not pass the User Mode bump test or does not respond appropriately, as defined by the user, in Measuring Mode. For more information about bump test and calibration requirements, see IEC 60079-29-2. GasWatch 3 for CO and O...

  • Page 3: Table Of Contents

    Turning On the GasWatch 3 ........
  • Page 4 Sensor/Battery Replacement Date (SEN.DATE) ....... 83 GasWatch 3 for CO and O...
  • Page 5 La substitution de composants peut nuire à la sécurité intrinsèque. Pour éviter l'inflammation d'une atmosphère dangereuse, les batteries ne doivent être remplacées ou chargées que dans une zone non dangereuse. Non testé dans des atmosphères enrichies en oxygène (plus de 21%). GasWatch 3 for CO and O...

  • Page 6: Chapter 1: Introduction

    Overview This chapter briefly describes the GasWatch 3 gas monitor. This chapter also describes the GasWatch 3 Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications for the GasWatch 3. About the GasWatch 3...

  • Page 7: Specifications

    • CSA classified, “C/US”, as Intrinsically Safe. Exia. Class I, Groups A, B, C, & D. Temperature Code T3A. Certificate Number CSA 19 CA70213062 186718 Power Supply CR2450 button cell battery GasWatch 3 for CO and O Chapter 1: Introduction • 7...

  • Page 8: About This Manual

    Approximately 42(H) x 63(W) x 22(D) mm (1.7”H x 2.5”W x 0.9”D) and Weight Approximately 45 g (1.6 oz.) About this Manual The GasWatch 3 Operator’s Manual uses the following conventions for notes, cautions, and warnings. NOTE: Describes additional or critical information. CAUTION: Describes potential damage to equipment.

  • Page 9: Chapter 2: Description

    Figure 1: Component Location Case The GasWatch 3’s sturdy, high-impact plastic case is radio frequency (RF) resistant and is suitable for use in many environmental conditions, indoors and out. The case is dust proof and water resistant. A clear plastic window is located on the front of the case for viewing the LCD.

  • Page 10: Control Buttons

    Maintenance, or Gas Select Mode. Vibrator A vibrating motor inside the GasWatch 3 case vibrates for gas alarms and unit malfunctions. NOTE: If STEALTH is set to ON, the vibrator only functions when VIB in the STEALTH Gas Select Mode item is set to ON (see pg.94).

  • Page 11: Filters

    A low battery warning activates when the GasWatch 3 detects a low battery voltage. The GasWatch 3 sounds a dead battery alarm when battery voltage is too low for Measuring Mode. NOTE: Use of batteries not specified by RKI Instruments, Inc. compromises the CSA classification and may void the warranty.

  • Page 12: Standard Accessories

    An alligator clip is installed to a base clip that attaches to spring bars on the back of the GasWatch 3. Use the alligator clip to attach the GasWatch 3 to clothing or a belt. Teeth in the alligator clip’s jaws prevent slipping. The alligator clip can be rotated to change the instrument’s orientation.

  • Page 13: Calibration Cup

    IrDA/USB Cable Unless your computer has a built-in IrDA port, a IrDA/USB cable is needed to establish communication between the GasWatch 3 and the Datalogging Program or the Setup Program. GasWatch 3 for CO and O Chapter 2: Description • 13...

  • Page 14: Chapter 3: Measuring Mode

    Measuring Mode. Start Up This section explains how to start up the GasWatch 3, get it ready for operation, and turn it off. Turning On the GasWatch 3 To illustrate certain functions, the following description of the GasWatch 3 start up sequence assumes that the following items in User Mode are turned on: LUNCH, CAL.RMDR, and...
  • Page 15 None tone tone Action • Option A, Perform calibration: The GasWatch 3 cannot be used • Option A, Perform calibration: Press and release POWER/ until a successful calibration is If you want to enter User MODE to enter User Mode performed.
  • Page 16 None tone tone Action • Option A, Perform bump test: The GasWatch 3 cannot be used • Option A, Perform bump test: Press and release POWER/ until a successful bump test is If you want to enter User MODE to enter User Mode performed.
  • Page 17 Station ID Screen. USER UID_001 SID_001 9. If the GasWatch 3 experiences a sensor failure during start up, a screen indicating that the sensor failed appears and the buzzer sounds a double pulsing tone once per second. FAIL FAIL SENSOR You cannot acknowledge the failure and continue to Measuring Mode.

  • Page 18: Performing A Demand Zero

    20.9 10:42 Performing a Demand Zero Perform a demand zero before using the GasWatch 3. This sets the CO reading to 0 ppm and the O reading to 20.9%. 1. Find a fresh-air environment. This is an environment free of toxic or combustible gases and of normal oxygen content (20.9%).

  • Page 19: Measuring Mode Operation

    OFF, the GasWatch 3 gives periodic indications to confirm that it’s operating or to indicate a non-compliance (see pg.66). Monitoring an Area 1. Start up the GasWatch 3 as described above in “Start Up” on page 14. It is now in Measuring Mode. 20.9 10:42 2.

  • Page 20: Alarms

    The GasWatch 3 buzzer sounds an alarm, the LEDs flash, and the vibrator pulses when any sort of alarm condition or failure occurs. If the GasWatch 3 is operating in Stealth Mode, the buzzer does not sound and the vibrator’s operation depends on the VIB setting in Gas Select Mode’s STEALTH item.
  • Page 21 • Alarm LEDs flash once per second System Failure • FAIL SYSTEM and an error code Double pulsing tone sounds appear on the LCD once per second • Alarm LEDs flash once per second GasWatch 3 for CO and O Chapter 3: Measuring Mode • 21...

  • Page 22: Responding To Alarms

    AVERTISSEMENT:Un dépassement de la plage peut indiquer une concentration extrême de monoxyde de carbone ou d'oxygène ou une concentration d'explosif. Confirmez la concentration de gaz avec un GasWatch 3 différent ou avec un autre dispositif de détection de gaz. 1. Follow your established procedure for an extreme gas condition.
  • Page 23 “Replacing the Battery” on page 74. The GasWatch 3 is fully functional during a low battery warning. However, only 10 days of operating time remain. The amount of time depends on LCD backlight use and alarm frequency.

  • Page 24: Data Logging

    The data logging capacity depends on how often the GasWatch 3 stores data and how often the GasWatch 3 is turned on and off. The table below illustrates how much data logging time is available for the various interval times.
  • Page 25 GasWatch 3 Datalogging Program (available at www.rkiinstruments.com/gw3). For a complete description of the Datalogging Program and procedures for downloading data to a computer, see the GasWatch 3 Datalogging Program Operator’s Manual. GasWatch 3 for CO and O Chapter 3: Measuring Mode • 25...

  • Page 26: Chapter 4: Display Mode

    To change a flashing parameter, press and release AIR. To reverse the movement in a list (ie. from down to up or vice versa): a. Press and hold AIR. b. Immediately press POWER/MODE and then release both buttons. 26 • Chapter 4: Display Mode GasWatch 3 for CO and O...

  • Page 27: Peak Screen (Peak)

    GasWatch 3 is turned off. The lunch break feature enables the GasWatch 3 to save the peak reading when it is turned off so it can continue with the same peak when it is turned on again (see pg.14).

  • Page 28: Twa Screen (Twa)

    DISP in Maintenance Mode is set to ON (factory setting is OFF). Use this screen to select a user ID from the 128 user IDs that are stored in the GasWatch 3’s memory. Before a user ID is selected on a brand new instrument, the user ID is “----------”.

  • Page 29: Station Id Screen (Stn Id)

    3’s memory. Before a station ID is selected on a brand new instrument, the station ID is “----------”. The factory-installed station IDs have a “S_ID_XXX” format. The station ID provides a way to identify the GasWatch 3 location during a data logging session.

  • Page 30: Last Successful Calibration Date (Cal.data)

    BP.RMDR is set to ON (factory setting is OFF). 1. After entering Display Mode, press and release POWER/MODE until the BP.DATA screen sequence appears. dISP dISP dISP BP .DATA YES / AIR NO / MODE 30 • Chapter 4: Display Mode GasWatch 3 for CO and O...

  • Page 31: Date/Time Screen (Date)

    The Alarm Points Screen shows the gas alarm settings. 1. After entering Display Mode, press and release POWER/MODE until the ALARM--P screen sequence appears. dISP dISP dISP ALARM--P YES / AIR NO / MODE GasWatch 3 for CO and O Chapter 4: Display Mode • 31...

  • Page 32: Adjusting The Buzzer Volume (Buzz.vol)

    2. Press and release AIR. The current setting flashes. 3. Use AIR to display the desired setting. 4. Press and release POWER/MODE to save the setting and return to the BUZZ.VOL item in Display Mode. 32 • Chapter 4: Display Mode GasWatch 3 for CO and O...

  • Page 33: Chapter 5: User Mode And Calibration

    Chapter 5: User Mode and Calibration Overview This section describes the GasWatch 3 in User Mode. See Table 8 below for a list of the items found in User Mode, the page that the item’s instructions can be found on, and a short description of the item.
  • Page 34 ON: Lunch break feature is on. Instrument asks if you want to resume TWA and PEAK readings at startup. OFF (factory setting): Lunch break feature is off. Instrument resets TWA and PEAK read- ings every time it’s turned on. 34 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...
  • Page 35 ON: User Mode is password-protected. Factory-set password is 0405. OFF (factory setting): User Mode is not password-protected. ROM/SUM View the firmware information for the GasWatch 3’s sensor board and main board. (pg.71) START (pg.72) Press and release POWER/MODE to begin the warmup sequence and enter Measuring Mode.

  • Page 36: Entering User Mode

    The GasWatch 3 is not in operation as a gas detector while in User Mode. 1. Take the GasWatch 3 to a non-hazardous location and turn it off if it is on. 2. Press and hold AIR, then press and hold POWER/MODE. When you hear a beep, release the buttons.

  • Page 37: Tips For Using User Mode

    2. Confirm that the regulator knob is turned all the way clockwise. Screw the 0.25 LPM fixed flow regulator onto the calibration cylinder. 3. Install the calibration cup onto the GasWatch 3. The calibration cup has an indicated flow direction. Be sure the calibration cup is installed in the correct direction and that it is pushed on all the way.
  • Page 38 As shipped from the factory, CO and O are both assigned to Cylinder A. 8. Make sure the GasWatch 3 has been turned on for at least 45 seconds before continuing. 9. Turn the regulator knob counterclockwise to open the regulator.
  • Page 39 Auto start after successful cal set to on? (default is on) *NOTE: Auto start after successful bump/cal parameters set using Datalogging or Setup Programs. Figure 5: Bump Test Flow Chart GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 39...
  • Page 40 POWER/MODE to go to the START item in the BUMP menu. 7. Remove the calibration cup. 8. Press and release POWER/MODE to enter Measuring Mode. 40 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...
  • Page 41 POWER/MODE to go to the START item in the BUMP menu. 9. Remove the calibration cup. 10. Press and release POWER/MODE to enter Measuring Mode. GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 41...
  • Page 42 7. Press and release POWER/MODE to enter Measuring Mode. return to the START item in the BUMP menu. 8. Press and release POWER/MODE to enter Measuring Mode. 42 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...

  • Page 43: Performing A Calibration (Gas Cal)

    3. Press and release POWER/MODE. The AIR item appears. 4. Press and release POWER/MODE to enter the AIR menu. 20.9 5. Make sure the GasWatch 3 has been turned on for at least 45 seconds before continuing. GasWatch 3 for CO and O...
  • Page 44 2. Confirm that the regulator knob is turned all the way clockwise. Screw the 0.25 LPM fixed flow regulator onto the calibration cylinder. 3. Install the calibration cup onto the GasWatch 3. The calibration cup has an indicated flow direction. Be sure the calibration cup is installed in the correct direction and that it is pushed on all the way.
  • Page 45 5. If necessary, use AIR to scroll to the Auto Cal screen for the gas(es) you want to calibrate. As shipped from the factory, CO and O are assigned to Cylinder A. 6. Make sure the GasWatch 3 has been turned on for at least 45 seconds before continuing. 7. Press and release POWER/MODE.
  • Page 46 Auto start after successful cal set to on? (default is on) *NOTE: Auto start after successful cal parameter set using Datalogging or Setup Programs. Figure 6: Calibration Flow Chart 46 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...
  • Page 47 9. After the last cylinder is calibrated, the instrument continues to the START item in the A-CAL menu. 10. Remove the calibration cup. 11. Press and release POWER/MODE to enter Measuring Mode. GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 47...
  • Page 48 6. Remove the calibration cup. 7. The instrument continues to the START item in the A-CAL menu. 8. Press and release POWER/MODE to enter Measuring Mode. 48 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...
  • Page 49 2. Confirm that the regulator knob is turned all the way clockwise. Screw the 0.25 LPM fixed flow regulator onto the calibration cylinder. 3. Install the calibration cup onto the GasWatch 3. The calibration cup has an indicated flow direction. Be sure the calibration cup is installed in the correct direction and that it is pushed on all the way.
  • Page 50 5. If necessary, use AIR to scroll to the Auto Cal screen for the gas(es) you want to calibrate. As shipped from the factory, CO and O are assigned to Cylinder A. 6. Make sure the GasWatch 3 has been turned on for at least 45 seconds before continuing. 7. Press and release POWER/MODE.
  • Page 51 Auto start after successful cal set to on? (default is on) *NOTE: Auto start after successful cal parameter set using Datalogging or Setup Programs. Figure 7: Calibration Flow Chart GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 51...
  • Page 52 9. After the last cylinder is calibrated, the instrument continues to the START item in the E-CAL menu. 10. Remove the calibration cup. 11. Press and release POWER/MODE to enter Measuring Mode. 52 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...
  • Page 53 6. Remove the calibration cup. 7. The instrument continues to the START item in the E-CAL menu. 8. Press and release POWER/MODE to enter Measuring Mode. GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 53...
  • Page 54 4. Press and release POWER/MODE. The Auto Cal screen for the gases assigned to Cylinder A displays. CYL A A-CAL 5. Use AIR to scroll to CAL--P. CAL--P 6. Press and release POWER/MODE. The CO channel displays. CAL--P 54 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...
  • Page 55 (ie. Cylinder A: CO, Cylinder B: O 1. While in User Mode, press AIR to scroll to GAS CAL. GAS CAL 2. Press and release POWER/MODE. The AIR CAL menu item appears. GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 55...
  • Page 56 6. Press and release POWER/MODE. CO displays. CYL SEL 7. Use AIR to scroll to the gas whose cylinder assignment you want to change. CYL SEL CYL SEL ESCAPE 56 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...

  • Page 57: Setting Calibration Parameters (Cal Set)

    The CAL SET menu has 4 items: CAL.RMDR, CAL.INT, CAL.EXPD, and ESCAPE. 1. While in User Mode, press AIR to scroll to CAL SET. CAL SET 2. Press and release POWER/MODE. The CAL.RMDR item appears. CAL .RMDR GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 57...
  • Page 58 CAL.RMDR ON (factory setting): The GasWatch 3 gives an indication at start up if it is due for calibration. The type of indication depends on the CAL.EXPD setting (see pg.58). OFF: The GasWatch 3 does not give an indication at start up if it is due for calibration.

  • Page 59: Setting Bump Test Parameters (Bump.set)

    SETTING The SETTING menu has 5 items: GAS.TIME, CHECK, CAL.TIME, A-CAL, and ESCAPE. 1. After entering the BUMP.SET menu, press AIR to scroll to SETTING. SETTING GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 59...
  • Page 60 CAL.TIME is set to 90 seconds and the GAS.TIME is set to 30 seconds, if the bump test fails, the GasWatch 3 is only exposed to gas for an additional 60 seconds. The available values are 90 seconds (factory setting), and 120 seconds.
  • Page 61 3. See “Exiting the BUMP.SET Menu” on page 63 to return to User Mode. BP.RMDR ON: The GasWatch 3 gives an indication at start up if it is due for bump testing. The type of indication depends on the BP.EXPD setting (see pg.62). If the instrument is not due for bump testing, a check mark appears in the lower left corner of the LCD.
  • Page 62 A successful bump test must be performed in order to use the instrument. NONE: The GasWatch 3 gives an indication at startup that a bump test is past due. It is not necessary to acknowledge the indication. If desired, press POWER/MODE to enter User Mode and perform a bump test.

  • Page 63: Alarm Settings (Alarm--P)

    The ALARM--P menu has 3 items: ALARM--P, DEF.ALMP, and ESCAPE. 1. While in User Mode, press AIR to scroll to ALARM--P. ALARM--P 2. Press and release POWER/MODE. The first screen displays. ALARM--P GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 63...
  • Page 64 8. Repeat Step 1 - Step 7 to change the alarm points for the other channel. 9. See “ESCAPE” on page 65 to return to User Mode. 64 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...

  • Page 65: Updating The Lunch Break Setting (Lunch)

    TWA and PEAK readings and the time in operation from the last time the GasWatch 3 was used or start collecting new readings and reset the time in operation. 1. While in User Mode, press AIR to scroll to LUNCH.

  • Page 66: Setting The Confirmation Beep And Non-Compliance Indicator (Beep)

    OFF (factory setting): The GasWatch 3 does not provide a confirmation alert or non- compliance indicator. LED: The GasWatch 3’s LEDs double flash as often as defined by the BEEP.INT parameter to verify that the instrument is operating. BUZZER: The GasWatch 3’s buzzer double beeps as often as defined by the BEEP.INT parameter to verify that the instrument is operating.

  • Page 67: Updating The Backlight Time (Bl Time)

    4. Press and release POWER/MODE to save the setting and return to the BL TIME item in User Mode. 5. See “Entering Measuring Mode (START)” on page 72 to enter Measuring Mode. GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 67...

  • Page 68: Turning The Key Tone On/Off (Key.tone)

    4. Press and release POWER/MODE to save the setting and return to the DISP.SET item in User Mode. 5. See “Entering Measuring Mode (START)” on page 72 to enter Measuring Mode. 68 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...

  • Page 69: Zero Suppression (Zero.sup)

    4. Press and release POWER/MODE to save the setting and return to the E-CAL item in User Mode. 5. See “Entering Measuring Mode (START)” on page 72 to enter Measuring Mode. GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 69...

  • Page 70: Setting The Date/Time (Date)

    6. See “Entering Measuring Mode (START)” on page 72 to enter Measuring Mode. Turning the Password On/Off (PASS-W) ON: The GasWatch 3 prompts you for a password when you enter User Mode. The factory-set password is 0405 but it can be changed.

  • Page 71: Viewing The Rom/Sum (Rom/Sum)

    3. Press and release POWER/MODE to return to the ROM/SUM item in User Mode. 4. See “Entering Measuring Mode (START)” on page 72 to enter Measuring Mode. GasWatch 3 for CO and O Chapter 5: User Mode and Calibration • 71...

  • Page 72: Entering Measuring Mode (Start)

    Entering Measuring Mode (START) 1. While in User Mode, press AIR to scroll to START. START 2. Press and release POWER/MODE. The instrument begins its warmup sequence. 72 • Chapter 5: User Mode and Calibration GasWatch 3 for CO and O...

  • Page 73: Chapter 6: Maintenance

    Chapter 6: Maintenance Overview This chapter describes troubleshooting procedures for the GasWatch 3. It also includes procedures for replacing the battery and replacing various consumable parts. WARNING: RKI Instruments recommends that service, calibration, and repair of RKI gas detectors be performed by personnel properly trained for this work.

  • Page 74: Replacing The Battery

    Symptoms Probable Causes Recommended Action • Calibration fails. • The calibration value does not 1. Make sure the GasWatch 3 has been match the cylinder gas properly set up for calibration. concentration. 2. Check all calibration tubing for leaks or for any bad connections.

  • Page 75: Replacing The Charcoal Filter

    If you do not set the date and time within 30 seconds, the instrument automatically begins its warmup sequence. Replacing the Charcoal Filter 1. Verify that the GasWatch 3 is off. 2. Use a small Phillips screwdriver to unscrew the sensor retainer’s screw. 3. Remove the sensor retainer.

  • Page 76: Replacing The Hydrophobic Filter

    9. Reinstall the sensor retainer and tighten its screw. Replacing the Hydrophobic Filter 1. Verify that the GasWatch 3 is off. 2. Use a small Phillips screwdriver to unscrew the sensor retainer’s screw. 3. Remove the sensor retainer.

  • Page 77: Replacing The Sensor

    7. Reinstall the sensor retainer and tighten its screw. Replacing the Sensor 1. Verify that the GasWatch 3 is off. 2. Use a small Phillips screwdriver to unscrew the sensor retainer’s screw. 3. Remove the sensor retainer. 4. Remove the sensor gasket and filters. The filters may fall out. The sensor is exposed.

  • Page 78: Chapter 7: General Parts List

    Chapter 7: General Parts List Table 10 lists part numbers for the GasWatch 3’s replacement parts and accessories. Table 10: General Parts List Part Number Description 06-1248RK-03 Calibration kit tubing, 3 foot length 07-0056 Sensor gasket 10-1088 Screw, for sensor retainer and battery retainer...

  • Page 79: Appendix A: Maintenance Mode

    AIR. A.ZERO (pg.85) ON: The GasWatch 3 asks if you want to perform a fresh air adjustment at the end of the startup sequence. OFF (factory setting): The GasWatch 3 does not ask if you want to perform a fresh air adjustment at the end of the startup sequence.

  • Page 80: Entering Maintenance Mode

    The GasWatch 3 is not in operation as a gas detector while in Maintenance Mode. 1. Take the GasWatch 3 to a non-hazardous location and turn it off if it is on. 2. Press and hold AIR, then press and hold POWER/MODE. You will hear a beep after one second.

  • Page 81: Tips For Using Maintenance Mode

    • To skip an item when a question is asked, press and release AIR. • To enter an item and to save any changes, press and release POWER/MODE. GasWatch 3 for CO and O Appendix A: Maintenance Mode • 81...

  • Page 82: Performing A Calibration (Gas Cal)

    1. Confirm that the regulator knob is turned all the way clockwise. Screw the 0.25 LPM fixed flow regulator onto the calibration cylinder. 2. Install the calibration cup onto the GasWatch 3. The calibration cup has an indicated flow direction. Be sure the calibration cup is installed in the correct direction and that it is pushed on all the way.

  • Page 83: Sensor/Battery Replacement Date (Sen.date)

    5. Turn the regulator knob clockwise to close the regulator. 6. Unscrew the regulator from the calibration cylinder. 7. Remove the calibration cup from the GasWatch 3. 8. Store the calibration kit in a safe and convenient place. 9. Press and release POWER/MODE to return to the GAS.TEST item in Maintenance Mode.

  • Page 84: Performing A Bump Test (Bump)

    See “Performing a Bump Test (BUMP)” on page 37 for a description of the BUMP item. Setting Alarms to Latching or Self-Resetting (LATCH) ON (factory setting): The GasWatch 3 remains in alarm until the alarm condition passes and POWER/MODE is pressed.

  • Page 85: Turning The Demand Zero Function On/Off (D.zero)

    5. See “Entering Measuring Mode (START)” on page 90 to enter Measuring Mode. Turning the Auto Zero Function On/Off (A.ZERO) ON: The GasWatch 3 asks if you want to perform a fresh air adjustment at the end of the startup sequence.

  • Page 86: Turning The Id Display Function On/Off (Id Disp)

    Maintenance Mode. It is not normally necessary to have the zero suppression item appear in User Mode. Contact RKI Instruments before turning this setting on. 86 • Appendix A: Maintenance Mode GasWatch 3 for CO and O...

  • Page 87: User Mode Zero Follower (Zflw.dsp)

    6. See “Entering Measuring Mode (START)” on page 90 to enter Measuring Mode. Turning the Password On/Off (PASS-W) ON (factory setting): The GasWatch 3 prompts you for a password when you enter Maintenance Mode. The factory-set password is 3000 but it can be changed.

  • Page 88: Viewing The Rom/Sum (Rom/Sum)

    Viewing the ROM/SUM (ROM/SUM) The ROM/SUM screen shows the instrument’s firmware version and firmware checksum. 1. While in Maintenance Mode, press AIR to scroll to ROM/SUM. ROM / SUM 88 • Appendix A: Maintenance Mode GasWatch 3 for CO and O...

  • Page 89: Performing A Default (M.def)

    3. Press and release POWER/MODE to perform a default operation. The instrument asks if you are sure you want to perform a default operation. NO .AIR SURE? YES .MODE GasWatch 3 for CO and O Appendix A: Maintenance Mode • 89...

  • Page 90: Entering Measuring Mode (Start)

    5. See “Entering Measuring Mode (START)” on page 90 to enter Measuring Mode. Entering Measuring Mode (START) 1. While in Maintenance Mode, press AIR to scroll to START. START 2. Press and release POWER/MODE. The instrument begins its warmup sequence. 90 • Appendix A: Maintenance Mode GasWatch 3 for CO and O...

  • Page 91: Appendix B: Gas Select Mode

    The GasWatch 3 is not in operation as a gas detector while in Gas Select Mode. 1. Take the GasWatch 3 to a non-hazardous location and turn it off if it is on. 2. Press and hold AIR, then press and hold POWER/MODE. You will hear a beep after one second.

  • Page 92: Tips For Using Gas Select Mode

    RKI default regardless of if a SAVE-AP operation was performed. 1. While in Gas Select Mode, press AIR to scroll to SAVE-AP. SAVE-AP 92 • Appendix B: Gas Select Mode GasWatch 3 for CO and O...

  • Page 93: Turning The Calibration Max Span On/Off (Max.span)

    5. See “Exiting Gas Select Mode (START)” on page 94 to enter Measuring Mode. Turning Calibration Max Span On/Off (MAX.SPAN) ON: After a passed calibration, the GasWatch 3 displays the response reading’s maximum adjustment. A maximum span of 100 ppm on the CO channel indicates that the reading could have been adjusted up to 100 ppm.

  • Page 94: Stealth And Vibrator Settings (Stealth)

    Exiting Gas Select Mode (START) 1. While in Gas Select Mode, press AIR to scroll to START. START 2. Press and release POWER/MODE. The instrument begins its warm-up sequence. 94 • Appendix B: Gas Select Mode GasWatch 3 for CO and O...
  • Page 95 Warranty RKI Instruments, Inc. warrants the GasWatch 3 sold by us to be free from defects in materials, workmanship, and performance for a period of three years from the date of shipment from RKI Instruments, Inc. This includes the instrument and the original sensor. Replacement parts are warranted for 1 year from the date of their shipment from RKI Instruments, Inc.

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