RKI Instruments CX-04 Operator's Manual
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RKI Instruments CX-04 Operator's Manual

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CX-04
Operator's Manual
Part Number: 71-0559
Revision: P2
Released: 12/1/21
www.rkiinstruments.com

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  • Page 1 CX-04 Operator’s Manual Part Number: 71-0559 Revision: P2 Released: 12/1/21 www.rkiinstruments.com...
  • Page 2 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. 2 • CX-04...

  • Page 3: Table Of Contents

    Turning On the CX-04 ........
  • Page 4 Performing a Gas Test (GAS.TEST)......... 86 4 • CX-04...
  • 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%). CX-04 • 5...

  • Page 6: Chapter 1: Introduction

    The CX-04 offers a full range of features, including: •...

  • Page 7: Specifications

    • 0 - 500 ppm: ± 5% of reading or ± 5 • 0 - 25.0 ppm: ± 0.5% O ppm CO (whichever is greater) • 25.1 - 40.0%: ± 3.0% O • 510 - 2,000 ppm: ± 20% of reading Table 2: CX-04 Specifications Sampling Diffusion Method Response Time...

  • Page 8: About This Manual

    Approximately 67(H) x 54(W) x 24(D) mm (2.6”H x 2.1”W x 0.9”D) and Weight Approximately 93 g (3.3 oz.) About this Manual The CX-04 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

    A feature in the lower left corner of the rear case is used to install the optional wrist strap. A digital LCD (liquid crystal display) is visible through a clear plastic window in the top case. The LCD shows the gas reading. The LCD also shows information for each of the CX-04’s operating modes. CX-04...

  • Page 10: Control Buttons

    User, Maintenance, or Gas Select Mode. Vibrator A vibrating motor inside the CX-04 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.97).

  • Page 11: Filters

    Batteries 2 AAA batteries (alkaline or Ni-MH) power the CX-04. At 25°C alkaline batteries will last at least 4,600 hours (191 days) and Ni-MH batteries will last at least 3,000 hours (125 days). The battery icon in the upper right of the LCD shows remaining battery life.

  • Page 12: Standard Accessories

    An alligator clip installs to 2 spring bars on the rear case. Use the alligator clip to attach the CX-04 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: Optional Accessories

    Optional Accessories Belt Clip The belt clip installs to 2 spring bars on the rear case and is used to easily clip the CX-04 onto a belt. Belt Clip Figure 4: Belt Clip Wrist Strap The wrist strap connects to a feature on the back case.

  • Page 14: Chapter 3: Measuring Mode

    Measuring Mode. Start Up This section explains how to start up the CX-04, get it ready for operation, and turn it off. Turning On the CX-04 To illustrate certain functions, the following description of the CX-04 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 CX-04 cannot be used until a • Option A, Perform calibration: Press and release POWER successful calibration is per- If you want to enter User MODE to enter User Mode formed.
  • Page 16 None tone tone Action • Option A, Perform bump test: The CX-04 cannot be used until • Option A, Perform bump test: Press and release POWER a successful bump test is per- If you want to enter User MODE to enter User Mode formed.
  • Page 17 Station ID Screen. USER U_ID_001 S_ID_001 9. If the CX-04 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 Performing a Demand Zero Perform a demand zero before using the CX-04. This sets the CO reading to 0 ppm and the O reading to 20.9% volume. 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: Turning Off The Cx-04

    4. Continue to hold AIR until the LCD prompts you to release it. The CX-04 sets the fresh air reading. Start up is complete and the unit is now ready for monitoring. 5. If Password Protection is turned On (factory setting is Off) using the 04 Series Setup Program, a user-set password is required to perform a demand zero.

  • Page 20: Measuring Mode Operation

    OFF, the CX-04 gives periodic indications to confirm that it’s operating or to indicate a non-compliance (see pg.65). Monitoring an Area 1. Start up the CX-04 as described above in “Start Up” on page 14. It is now in Measuring Mode. 20.9 2.

  • Page 21: Alarms

    Alarm Indications The CX-04 buzzer sounds an alarm, the LED flashes, and the vibrator pulses when any sort of alarm condition or failure occurs. If the CX-04 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 22 • Alarm LED flashes once per second System Failure • FAIL SYSTEM and an error code Double pulsing tone sounds appear on the LCD once per second • Alarm LED flashes once per second 22 • Chapter 3: Measuring Mode CX-04...

  • Page 23: Responding To Alarms

    AVERTISSEMENT:Un dépassement de la plage peut indiquer une concentration extrême en monoxyde de carbone ou une concentration en explosif. Confirmez la concentration de gaz avec un CX-04 différent ou avec un autre dispositif de détection de gaz. 1. Follow your established procedure for an extreme gas condition.
  • Page 24 “Replacing the Batteries (Alkaline or Ni-MH)” on page 72. The CX-04 is fully functional during a low battery warning. However, only a couple of days of operating time remain. The amount of time depends on LCD backlight use and alarm frequency.
  • Page 25 If the error code is 031, press and release POWER MODE to continue into Measuring Mode if the instrument must be used temporarily. CAUTION: There is no datalogging function if you operate the instrument after a 031 system failure. Contact RKI Instruments, Inc. as soon as possible. CX-04 Chapter 3: Measuring Mode • 25...

  • Page 26: Data Logging

    Logged data can be download it to a computer via the infrared communications port on the front of the unit. The data logging capacity depends on how often the CX-04 stores data and how often the CX-04 is turned on and off. The table below illustrates how much data logging time is available for the various interval times.

  • Page 27: 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. CX-04 Chapter 4: Display Mode • 27...

  • Page 28: Gas Name Screen

    CX-04 is turned off. The lunch break feature enables the CX-04 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 29: Stel Screen (Stel)

    The missing readings are assigned a value of 0. If LUNCH is set to OFF (factory setting), the TWA is cleared when the CX-04 is turned off. If LUNCH is set to ON, the CX-04 remembers the TWA reading when it is turned off and can continue accumulation when it is turned on again (see pg.14).

  • Page 30: Station Id Screen (Stn Id)

    DISP in Maintenance Mode is set to ON (factory setting is OFF). Use this screen to select a station ID from the 128 station IDs that are stored in the CX-04’s memory. Before a station ID is selected on a brand new instrument, the station ID is “----------”.

  • Page 31: Last Successful Calibration Date (Cal.data)

    NO /MODE 2. Press AIR to enter the BP.DATA screen and switch between the channels. 2019 2019 10.24 10.24 3. Press and release POWER MODE to return to the BP.DATA screen in Display Mode. CX-04 Chapter 4: Display Mode • 31...

  • Page 32: Date/Time Screen (Date)

    2. Press and release AIR. The Full Scale Setting screen appears. 3. Use AIR to scroll through the Warning, Alarm, Alarm H, STEL (CO only), and TWA (CO only) settings. 2000 40.0 19.5 18.0 F.S. WARNING ALARM 1200 23.5 ALARM H STEL 32 • Chapter 4: Display Mode CX-04...

  • Page 33: 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. CX-04 Chapter 4: Display Mode • 33...

  • Page 34: Chapter 5: User Mode And Calibration

    Chapter 5: User Mode and Calibration Overview This section describes the CX-04 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 35 ON: Lunch break feature is on. Instrument asks if you want to resume TWA (CO only) and PEAK readings at startup. OFF (factory setting): Lunch break feature is off. Instrument resets TWA (CO only) and PEAK readings every time it’s turned on. CX-04 Chapter 5: User Mode and Calibration • 35...
  • Page 36 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 CX-04’s sensor board and main board. (pg.70) START (pg.70) Press and release POWER MODE to begin the warmup sequence and enter Measuring Mode.

  • Page 37: Entering User Mode

    The CX-04 is not in operation as a gas detector while in User Mode. 1. Take the CX-04 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 38: Tips For Using User Mode

    • Calibration cup 1. Confirm that the CX-04’s calibration gas value matches the concentration listed on the calibration gas cylinder as described on pg.55. 2. Confirm that the regulator knob is turned all the way clockwise. Screw the 0.25 LPM fixed flow regulator onto the calibration cylinder.
  • Page 39 3. Install the calibration cup onto the CX-04. Be sure the calibration cup is installed in the correct direction and that it is pushed on all the way. POW ER MODE Side View Front View 4. Use the tubing to connect the regulator to the inlet of the calibration cup (labeled “IN”).
  • Page 40 Assigned? 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 6: Bump Test Flow Chart 40 • Chapter 5: User Mode and Calibration CX-04...
  • Page 41 6. After the last cylinder is bump tested, press and release 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. CX-04 Chapter 5: User Mode and Calibration • 41...
  • Page 42 Use AIR to scroll readings. and release POWER MODE to enter between the results and the readings. Measuring Mode. 7. Calibrate the CX-04 as soon as possible. 18.0 BMP / CAL BMP / BMP / CAL BMP / 17.5...
  • Page 43 7. Press and release POWER MODE to 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. CX-04 Chapter 5: User Mode and Calibration • 43...

  • Page 44: Performing A Calibration (Gas Cal)

    (A-CAL or E-CAL). • The CX-04 can be calibrated using either A-CAL or E-CAL depending on the setting of the E-CAL User Mode item. A-CAL (appears if E-CAL User Mode item is set to OFF): Apply gas for a period of time, then press and release POWER MODE to perform the adjustment.
  • Page 45 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 CX-04. Be sure the calibration cup is installed in the correct direction and that it is pushed on all the way.
  • Page 46 CO and O are assigned to Cylinder A. 6. Make sure the CX-04 has been turned on for at least 45 seconds before continuing. 7. Press and release POWER MODE. 8. The gas reading flashes and the bottom of the screen alternates between “APPLY” and “A- CAL”.
  • Page 47 Multiple Cylinders Assigned? 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 CX-04 Chapter 5: User Mode and Calibration • 47...
  • Page 48 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. 48 • Chapter 5: User Mode and Calibration CX-04...
  • Page 49 5. Unscrew the regulator. 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. CX-04 Chapter 5: User Mode and Calibration • 49...
  • Page 50 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 CX-04. Be sure the calibration cup is installed in the correct direction and that it is pushed on all the way.
  • Page 51 CO and O are assigned to Cylinder A. 6. Make sure the CX-04 has been turned on for at least 45 seconds before continuing. 7. Press and release POWER MODE. 8. The gas reading flashes and the bottom of the screen says “GAS IN”.
  • Page 52 Multiple Cylinders Assigned? 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 8: Calibration Flow Chart 52 • Chapter 5: User Mode and Calibration CX-04...
  • Page 53 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. CX-04 Chapter 5: User Mode and Calibration • 53...
  • Page 54 5. Unscrew the regulator. 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. 54 • Chapter 5: User Mode and Calibration CX-04...
  • Page 55 7. Use AIR to scroll to the gas whose calibration gas value you want to change. CAL-P CAL-P ESCAPE 8. Press and release POWER MODE. The calibration value begins to flash. CAL-P CX-04 Chapter 5: User Mode and Calibration • 55...
  • Page 56 2. Press and release POWER MODE. The AIR CAL menu item appears. 3. Use AIR to scroll to the A-CAL item (E-CAL if E-CAL in User Mode is set to ON). A-CAL 56 • Chapter 5: User Mode and Calibration CX-04...
  • Page 57 15. Press and release POWER MODE. The instrument returns to the A-CAL menu item in the GAS CAL menu. 16. See “Exiting the GAS CAL Menu” on page 58 to return to User Mode. CX-04 Chapter 5: User Mode and Calibration • 57...

  • Page 58: Setting Calibration Parameters (Cal Set)

    CAL .RMDR CAL.RMDR ON (factory setting): The CX-04 gives an indication at start up if it is due for calibration. The type of indication depends on the CAL.EXPD setting (see pg.59). OFF: The CX-04 does not give an indication at start up if it is due for calibration.

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

    MODE to enter User Mode and perform a calibration. CANT.USE: The CX-04 gives an indication at start up that calibration is past due. Press and release POWER MODE to enter User Mode and perform a calibration. Pressing AIR has no effect.
  • Page 60 1. After entering the SETTING menu, press AIR to scroll to CHECK. CHECK 2. Press and release POWER MODE. The current setting flashes. 3. Use AIR to display the desired setting. 60 • Chapter 5: User Mode and Calibration CX-04...
  • Page 61 CAL.TIME is set to 90 seconds and the GAS.TIME is set to 30 seconds, if the bump test fails, the CX-04 is only exposed to gas for an additional 60 seconds. The available values are 90 seconds (factory setting), and 120 seconds.
  • Page 62 BP.RMDR ON: The CX-04 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 63: Alarm Settings (Alarm--P)

    2. Press and release POWER MODE. The first screen displays. ALARM-P Setting the Alarm Points 1. After entering the ALARM-P menu, press AIR to scroll to the gas name. ALARM-P ALARM-P DEF .ALMP ESCAPE 2. Press and release POWER MODE. CX-04 Chapter 5: User Mode and Calibration • 63...
  • Page 64 5. Press POWER MODE to default the alarm points. Press AIR to return to the DEF.ALMP item in the ALARM-P menu. 6. See “ESCAPE” on page 65 to return to User Mode. 64 • Chapter 5: User Mode and Calibration CX-04...

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

    ON: The Lunch Break Screen displays during startup. From this screen, you can choose to continue accumulating TWA (CO only) and PEAK readings and the time in operation from the last time the CX-04 was used or start collecting new readings and reset the time in operation.
  • Page 66 LED: The CX-04’s LED double flashes as often as defined by the BEEP.INT parameter to verify that the instrument is operating. BUZZER: The CX-04’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)

    Display Mode if ID DISP in Maintenance Mode is also set to ON (factory setting is OFF). 1. While in User Mode, press AIR to scroll to DISP.SET. DISP .SET CX-04 Chapter 5: User Mode and Calibration • 67...

  • Page 68: 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 70 to enter Measuring Mode. 68 • Chapter 5: User Mode and Calibration CX-04...

  • Page 69: Setting The Date/Time (Date)

    6. See “Entering Measuring Mode (START)” on page 70 to enter Measuring Mode. Turning the Password On/Off (PASS-W) ON: The CX-04 prompts you for a password when you enter User Mode. The factory-set password is 0405 but it can be changed.

  • Page 70: Viewing The Rom/Sum (Rom/Sum)

    4. See “Entering Measuring Mode (START)” on page 70 to enter Measuring Mode. 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. 70 • Chapter 5: User Mode and Calibration CX-04...

  • Page 71: Chapter 6: Maintenance

    Chapter 6: Maintenance Overview This chapter describes troubleshooting procedures for the CX-04. It also includes procedures for replacing the batteries 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 72: Replacing The Batteries

    WARNING: Use only Duracell MN2400 or PC2400 or Eneloop BK-4MCC batteries to maintain the QPS classification of the CX-04. Use of other batteries will void the QPS classification and may void the warranty. Do not mix old/new or different types of batteries.
  • Page 73 4. Remove the battery cover. 5. Remove the old batteries. NOTE: New batteries must be installed within 5 minutes to avoid having to reset the date/ time. Battery Cover Figure 11: Battery Cover Removal CX-04 Chapter 6: Maintenance • 73...
  • Page 74 1. Remove the batteries from the CX-04 as described in Step 1 - Step 5 on page 72. 2. Install the Ni-MH batteries in the charger. See the battery charger’s manual for charging instructions.

  • Page 75: Replacing The Charcoal Filter

    Replacing the Charcoal Filter 1. Verify that the CX-04 is off. 2. Remove the rubber boot, if installed. 3. Use a small Phillips screwdriver to unscrew the 4 screws that attached the front case to the rear case. Screw, 4x Figure 13: Unscrewing Case Screws 4.
  • Page 76 11. Reinstall the front case to the rear case. 12. Reinstall the 4 screws that were removed in Step 3. 13. Reinstall the rubber boot, if being used. 76 • Chapter 6: Maintenance CX-04...

  • Page 77: Replacing The Hydrophobic Filter

    Replacing the Hydrophobic Filter 1. Verify that the CX-04 is off. 2. Remove the rubber boot, if installed. 3. Use a small Phillips screwdriver to unscrew the 4 screws that attached the front case to the rear case. Screw, 4x Figure 16: Unscrewing Case Screws 4.
  • Page 78 14. Reinstall the front case to the rear case. 15. Reinstall the 4 screws that were removed in Step 3. 16. Reinstall the rubber boot, if being used. 78 • Chapter 6: Maintenance CX-04...

  • Page 79: Replacing The Sensor

    Replacing the Sensor 1. Verify that the CX-04 is off. 2. Remove the rubber boot, if installed. 3. Use a small Phillips screwdriver to unscrew the 4 screws that attached the front case to the rear case. Screw, 4x Figure 19: Unscrewing Case Screws 4.
  • Page 80 9. Reinstall the front case to the rear case. 10. Reinstall the 4 screws that were removed in Step 3. 11. Reinstall the rubber boot, if being used. 12. Calibrate the new sensor as described on pg.44. 80 • Chapter 6: Maintenance CX-04...

  • Page 81: Chapter 7: General Parts List

    Chapter 7: General Parts List Table 11 lists part numbers for the CX-04’s replacement parts and accessories. Table 11: General Parts List Part Number Description 06-1248RK-03 Calibration kit tubing, 3 foot length 07-6033 Sensor gasket 10-1105-01 Screw, for securing front case to rear case...
  • Page 82 81-1194 Calibration cup 81-CX04-LV Calibration kit: 34 liter steel cylinder of 50 ppm CO in N , regulator, tubing, calibration cup, case ESR-X1DP-CX Dual carbon monoxide (CO) and oxygen (O ) sensor 82 • Chapter 7: General Parts List CX-04...

  • Page 83: Appendix A: Maintenance Mode

    OFF: You cannot manually perform a fresh air adjust in Measuring Mode by pressing AIR. A.ZERO (pg.89) ON: The CX-04 asks if you want to perform a fresh air adjustment at the end of the startup sequence. OFF (factory setting): The CX-04 does not ask if you want to perform a fresh air adjust- ment at the end of the startup sequence.

  • Page 84: Entering Maintenance Mode

    The CX-04 is not in operation as a gas detector while in Maintenance Mode. 1. Take the CX-04 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 85: Tips For Using Maintenance Mode

    Press and hold AIR. b. Immediately press POWER MODE and then release both buttons. • To exit an entered item without saving a change, press and hold AIR and POWER MODE for a few seconds. CX-04 Appendix A: Maintenance Mode • 85...

  • Page 86: 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 CX-04. Be sure the calibration cup is installed in the correct direction and that it is pushed on all the way.

  • Page 87: 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 CX-04. 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 88: Performing A Bump Test (Bump)

    See “Performing a Bump Test (BUMP)” on page 38 for a description of the BUMP item. Setting Alarms to Latching or Self-Resetting (LATCH) ON (factory setting): The CX-04 remains in alarm until the alarm condition passes and POWER MODE is pressed.

  • Page 89: Turning The Auto Zero Function On/Off (A.zero)

    Turning the Auto Zero Function On/Off (A.ZERO) ON: The CX-04 asks if you want to perform a fresh air adjustment at the end of the startup sequence. OFF (factory setting): The CX-04 does not ask if you want to perform a fresh air adjustment at the end of the startup sequence.

  • Page 90: Turning The Zero Follower On/Off (Zero.flw)

    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. User Mode Zero Follower (ZFLW.DSP) ON: Zero follower item appears in User Mode.

  • Page 91: Turning The Password On/Off (Pass-W)

    Turning the Password On/Off (PASS-W) ON (factory setting): The CX-04 prompts you for a password when you enter Maintenance Mode. The factory-set password is 3000 but it can be changed. OFF: No password is required to enter Maintenance Mode. 1. While in Maintenance Mode, press AIR to scroll to PASS-W.

  • Page 92: Viewing The Rom/Sum (Rom/Sum)

    Performing a default operation in Maintenance Mode returns all parameters to their RKI factory settings. 1. While in Maintenance Mode, press AIR to scroll to M.DEF. M .DEF 2. Press and release POWER MODE. M .DEF YES .MODE NO .AIR 92 • Appendix A: Maintenance Mode CX-04...

  • Page 93: Entering Measuring Mode (Start)

    5. See “Entering Measuring Mode (START)” on page 93 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. CX-04 Appendix A: Maintenance Mode • 93...

  • Page 94: Appendix B: Gas Select Mode

    Appendix B: Gas Select Mode Overview This appendix describes the CX-04 in Gas Select Mode. The CX-04 is factory-set to suit most applications. Update settings in Gas Select Mode only if required for your specific application. A description of the Gas Select Mode items is shown in Table 13 below.

  • Page 95: 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 CX-04 Appendix B: Gas Select Mode • 95...

  • Page 96: Turning The Calibration Max Span On/Off (Max.span)

    5. See “Exiting Gas Select Mode (START)” on page 97 to enter Measuring Mode. Turning Calibration Max Span On/Off (MAX.SPAN) ON: After a passed calibration, the CX-04 displays the response reading’s maximum adjustment. A maximum span of 100 ppm indicates that the reading could have been adjusted up to 100 ppm.

  • Page 97: Stealth And Vibrator Settings (Stealth)

    7. See “Exiting Gas Select Mode (START)” on page 97 to enter Measuring Mode. 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. CX-04 Appendix B: Gas Select Mode • 97...

  • Page 98: Warranty

    Warranty RKI Instruments, Inc. warrants the CX-04 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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