RKI Instruments CO-04C Owner's manual

www.rkiinstruments.com

CO-04C

Operator’s Manual

Part Number: 71-0522

Revision: P2

Released: 5/24/21

2 • 04 Series for CO(-H2)

WARNING

Read and understand this instruction manual before operating

instrument. Improper use of the gas monitor could result in

bodily harm or death.

Maintenance of the gas monitor is essential for proper

operation and correct readings.

Bump test the instrument before each day’s use with a known

concentration of the target gas. A bump test can be done in User

Mode’s BUMP item or by applying gas in Measuring 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.

04 Series for CO(-H2) • 3

Table of Contents

Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

About the CO-04C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Chapter 2: Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Instrument Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Alarm LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Vibrator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Infrared Communications Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Alligator Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Watch Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Calibration Cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

IrDA/USB Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Chapter 3: Measuring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Turning On the CO-04C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Performing a Demand Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Turning Off the CO-04C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Measuring Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Monitoring an Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Responding to Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Data Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Chapter 4: Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Tips for Using Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Peak Screen (PEAK). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

STEL Screen (STEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

TWA Screen (TWA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4 • 04 Series for CO(-H2)

User ID Screen (USER ID). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Station ID Screen (STN ID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Last Successful Calibration Date (CAL.DATA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Last Successful Bump Test Screen (BP.DATA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Date/Time Screen (DATE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Temperature Screen (TEMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Alarm Points Screen (ALARM--P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Adjusting the Buzzer Volume (BUZZ.VOL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Chapter 5: User Mode and Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Entering User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Tips for Using User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Performing a Bump Test (BUMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Performing a Calibration (GAS CAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Setting Calibration Parameters (CAL SET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Setting Bump Test Parameters (BUMP.SET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Alarm Settings (ALARM--P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Updating the Lunch Break Setting (LUNCH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Setting the Confirmation Beep and Non-Compliance Indicator (BEEP) . . . . . . . . . . . . . 59

Updating the Backlight Time (BL TIME). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Turning the Key Tone On/Off (KEY.TONE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Display Mode Items (DISP.SET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Zero Suppression (ZERO.SUP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Zero Follower (ZERO.FLW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Turning Easy Calibration On/Off (E-CAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Setting the Date/Time (DATE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Turning the Password On/Off (PASS-W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Viewing the ROM/SUM (ROM/SUM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Entering Measuring Mode (START) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Chapter 6: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Replacing the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Replacing the Charcoal Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Replacing the Hydrophobic Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Replacing the Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Chapter 7: General Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Appendix A: Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Entering Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Tips for Using Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Performing a Calibration (GAS CAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Performing a Gas Test (GAS.TEST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Sensor/Battery Replacement Date (SEN.DATE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

04 Series for CO(-H2) • 5

Performing a Bump Test (BUMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Setting Alarms to Latching or Self-Resetting (LATCH) . . . . . . . . . . . . . . . . . . . . . . . . . 82

Turning the Demand Zero Function On/Off (D.ZERO) . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Turning the Auto Zero Function On/Off (A.ZERO). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Turning the ID Display Function On/Off (ID DISP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Turning the Zero Suppression On/Off (ZERO.SUP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Turning the Zero Follower On/Off (ZERO.FLW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

User Mode Zero Suppression (ZSUP.DSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

User Mode Zero Follower (ZFLW.DSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Cylinder Setting (CYL.DISP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Setting the Date/Time (DATE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Turning the Password On/Off (PASS-W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Viewing the ROM/SUM (ROM/SUM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Performing a Default (M.DEF). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Entering Measuring Mode (START) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Appendix B: Gas Select Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Entering Gas Select Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Tips for Using Gas Select Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Saving the Alarm Points (SAVE-AP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Turning the Calibration Max Span On/Off (MAX.SPAN) . . . . . . . . . . . . . . . . . . . . . . . . 90

Stealth and Vibrator Settings (STEALTH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Exiting Gas Select Mode (START). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

WARNING: Understand manual before operating. This is an intrinsically safe product.

Substitution of components may impair intrinsic safety. To prevent ignition

of a hazardous atmosphere, batteries must only be changed or charged in

an area known to be nonhazardous. Not tested in oxygen enriched

atmospheres (above 21%).

AVERTISSEMENT:Comprendre le manuel avant de l'utiliser. Ceci est un produit

intrinsèquement sûr. 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%).

6 • Chapter 1: Introduction 04 Series for CO(-H2)

Chapter 1: Introduction

Overview

This chapter briefly describes the CO-04C gas monitor. This chapter also describes the

CO-04C Operator’s Manual (this document). Table 1 at the end of this chapter lists the

specifications for the CO-04C.

About the CO-04C

Using an advanced detection system, the CO-04C personal gas monitor detects the presence

of carbon monoxide (CO). The CO-04C’s compact size and easy-to-use design make it ideally

suited for a wide range of applications, including sewage treatment plants, utility manholes,

tunnels, hazardous waste sites, power stations, petrochemical refineries, mines, paper mills,

drilling rigs, and fire fighting stations. The CO-04C offers a full range of features, including:

• Liquid crystal display (LCD) for complete and understandable information at a glance

• Ultrabright alarm LED

• Distinctive audible/vibrating alarms for dangerous gas conditions and audible alarms for

unit malfunction

• Microprocessor control for reliability, ease of use, and advanced capabilities

• Data logging functions

• Alarm trend data

• STEL, TWA, and over range alarms

• Peak reading

• Built-in time function

• Lunch break feature

• QPS “C/US” classification for Class I, Division I, Groups A, B, C, and D hazardous

atmospheres

WARNING: The Model CO-04C detects elevated levels of carbon monoxide which can

be dangerous or life threatening. When using the CO-04C, you must follow

the instructions and warnings in this manual to assure proper and safe

operation of the unit and to minimize the risk of personal injury. Be sure to

maintain and periodically calibrate the CO-04C as described in this

manual.

AVERTISSEMENT:Le modèle CO-04C détecte les niveaux élevés de monoxyde de carbone

qui peuvent être dangereux ou mettre la vie en danger. Lorsque vous

utilisez le CO-04C, vous devez suivre les instructions et les avertissements

de ce manuel pour assurer un fonctionnement correct et en toute sécurité

de l'appareil et pour réduire les risques de blessures. Assurez-vous de

maintenir et d’étalonner périodiquement le CO-04C comme décrit dans ce

manuel.

04 Series for CO(-H2) Chapter 1: Introduction • 7

Specifications

Table 1: Standard Sensor Specifications/Alarm Points

Table 2: CO-04C Specifications

Detection Range 0 - 500 ppm

Service Range 510 - 2,000 ppm

Reading Increment 0 - 300 ppm: 1 ppm

310 - 2,000 ppm: 10 ppm

Warning Factory Setting 25 ppm

Alarm Factory Setting 50 ppm

Alarm H Factory Setting 1200 ppm

STEL Alarm 200 ppm

TWA Alarm 25 ppm

Sampling

Method

Diffusion

Response Time T90 Within 10 Seconds

Display Graphics LCD Display

Operating

Temperature

& Humidity

Continuous environment: -20°C to 50

°

C/10 to 90% RH

Temporary environment (up to 15 minutes): -40°C to 60

°

C/0 to 95% RH

Indication

Accuracy

Detection Range: ± 5% of reading or ± 5 ppm CO (whichever is greater)

Service Range: ± 20% of reading

Safety/

Regulatory

• ATEX: Certificate Number DEKRA 19ATEX0097

II 1G Ex ia IIC T4 Ga (with alkaline batteries)

II 1G Ex ia IIC T3, Ga (with Ni-MH batteries)

• IECEx: Certificate Number IECEx DEK 19.0059

Ex ia IIC T4 Ga (with alkaline batteries)

Ex ia IIC T3 Ga (with Ni-MH batteries)

• QPS classified, “C/US”, as Intrinsically Safe. Exia. Class I, Groups A, B, C, & D.

Instrument

Power

Information

• Operating Voltage: 3.0V

• Operating Current: 1.0 mA

• Operating Power: 3.0 mW

Power Supply 2 AAA alkaline batteries; 1.5V, 1.175 AH (Duracell MN2400 or PC2400)

OR

2 AAA Ni-MH batteries; 1.2V, 800 mAH (Panasonic Eneloop BK-4MCC)

Continuous

Operating

Hours

@ 25 °C

Alkaline Batteries: 6,200 hours in Measuring Mode (Non Alarm Operation, Fully Charged)

Ni-MH Batteries: 4,200 hours in Measuring Mode (Non Alarm Operation, Fully Charged)

8 • Chapter 1: Introduction 04 Series for CO(-H2)

About this Manual

The CO-04C Operator’s Manual uses the following conventions for notes, cautions, and

warnings.

NOTE: Describes additional or critical information.

CAUTION: Describes potential damage to equipment.

WARNING: Describes potential danger that can result in injury or death.

Case High-impact Plastic, RF Shielded, Dust and Weather Proof (IP67)

Standard

Accessories

• Alligator clip

• Rubber boot

Optional

Accessories

• Belt clip

• Calibration cup

• Datalogging and Setup Programs (Windows

®

7, 8, and 10), available at

www.rkiinstruments.com/04series

• IrDA/USB Cable for connecting to a computer when using the Datalogging and Setup

Programs (not needed if computer has an infrared port)

Dimensions

and Weight

Approximately 67(H) x 54(W) x 24(D) mm (2.6”H x 2.1”W x 0.9”D)

Approximately 93 g (3.3 oz.)

04 Series for CO(-H2) Chapter 2: Description • 9

Chapter 2: Description

Overview

This chapter describes the CO-04C instrument and its accessories.

Instrument Description

Case

The CO-04C’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.

The sensor retainer is located on the right side of the case and allows access to the filters and

sensor. A feature in the lower left corner of the rear case is used to install the optional wrist

strap.

LCD

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 CO-04C’s

operating modes.

Battery Cover

Battery Cover Screw

IrDA Port

Buzzer Opening

LCD

Wrist Strap

Connection

Control Buttons

CO

AIR

POWER

MODE

Alarm LED

Diffusion Port

Figure 1: Component Location

10 • Chapter 2: Description 04 Series for CO(-H2)

Control Buttons

Two control buttons, AIR and POWER MODE, are located below the LCD.

Alarm LED

The alarm LED above the LCD alert you to gas, low battery, and failure alarms.

Buzzer

One solid-state electronic buzzer is located inside the case. Sound exits the case through a

hole in the upper left corner of the front case. The buzzer sounds for gas alarms, malfunctions,

and low battery voltage. It also provides feedback for button presses and while in Display,

User, Maintenance, or Gas Select Mode.

Vibrator

A vibrating motor inside the CO-04C 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.91).

Sensor

The CO sensor is an electrochemical cell that consists of two precious metal electrodes in a

dilute acid electrolyte. A gas permeable membrane covers the sensor face and allows gas to

diffuse into the electrolyte. The gas reacts in the sensor and produces a current proportional to

the concentration of the target gas. The CO-04C’s circuitry amplifies the current, converts the

current to a gas concentration, and displays the concentration on the LCD.

This sensor does not respond to or responds minimally to hydrogen (displays H2 RICH once

H

2

concentration reaches 2000 ppm).

Table 3: CO-04C Control Button Functions

Button Function(s)

AIR • turns on LCD backlight

• resets alarm condition if LATCH is set to ON in Maintenance Mode

• enters User Mode, Maintenance Mode, and Gas Select Mode when used

with POWER MODE

• activates the demand zero function (adjusts the CO-04C’s fresh air reading)

• changes the value of a parameter available for adjustment

• scrolls through parameter options

POWER MODE • turns the CO-04C on and off

• turns on LCD backlight

• enters and scrolls through Display Mode

• enters instructions into the CO-04C’s microprocessor

• resets alarm condition if LATCH is set to ON in Maintenance Mode

• enters User Mode, Maintenance Mode, and Gas Select Mode when used

with AIR

04 Series for CO(-H2) Chapter 2: Description • 11

Filters

Charcoal Filter (Black)

A black charcoal filter is placed into a recess in the sensor gasket over the CO sensor. The

charcoal filter disk scrubs H

2

S and certain hydrocarbons out of the sample to avoid false CO

readings. If false or elevated CO readings are noticed, especially in the presence of H

2

S,

change the charcoal filter.

Hydrophobic Filter

The white, circular hydrophobic filter fits into a recessed area in the front case and is held in

place by the sensor gasket. It prevents water and particulates from entering the instrument.

Infrared Communications Port

An infrared (IR) communications port is located at the top of the instrument, near the LED.

Logged data transmits through the port in standard IrDA protocol. A computer’s infrared port

or an IrDA/USB cable connected to a USB port can be used to download data to the 04 Series

Datalogging Program. See the 04 Series Datalogging Program operator’s manual for data

logging and downloading instructions.

Batteries

2 AAA batteries (alkaline or Ni-MH) power the CO-04C. At 25°C alkaline batteries will last

at least 6,200 hours (258 days) and Ni-MH batteries will last at least 4,200 hours (175 days).

The battery icon in the upper right of the LCD shows remaining battery life.

A low battery warning activates when the CO-04C detects a low battery voltage. The CO-04C

sounds a dead battery alarm when battery voltage is too low for Measuring Mode.

WARNING: Use only Duracell MN2400 or PC2400 or Eneloop BK-4MCC batteries to

maintain the QPS classification of the CO-04C. Use of other batteries will

void the QPS classification and may void the warranty. Do not mix old/new

or different types of batteries.

AVERTISSEMENT:Utiliser uniquement des piles Duracell MN 2400 ou PC 2400 ou

Eneloop BK-4MCC de maintenir la classification QPS de la CO-04C.

L’utilisation d’autres piles annule la classification QPS et peut annuler la

garantie. Ne mélangez pas les anciennes/nouvelles ou différents types de

piles.

WARNING: To prevent ignition of a hazardous atmosphere, the batteries must only be

changed in an area known to be nonhazardous.

AVERTISSEMENT:Pour éviter l'inflammation d'une atmosphère dangereuse, la batterie

ne doit être remplacée que dans une zone non dangereuse.

12 • Chapter 2: Description 04 Series for CO(-H2)

Standard Accessories

Alligator Clip

An alligator clip installs to 2 spring bars on the rear case. Use the alligator clip to attach the

CO-04C 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.

Protective Rubber Boot

A protective rubber boot is installed over the CO-04C.

Open

Alligator Clip

Closed

Figure 2: Alligator Clip

Side Front

Figure 3: Rubber Boot

04 Series for CO(-H2) Chapter 2: Description • 13

Optional Accessories

Belt Clip

The belt clip installs to 2 spring bars on the rear case and is used to easily clip the CO-04C

onto a belt.

Wrist Strap

The wrist strap connects to a feature on the back case.

Calibration Cup

The calibration cup installs over the sensor. You must use the calibration cup when performing

a bump test, calibration, or gas test.

IrDA/USB Cable

Unless your computer has a built-in IrDA port, a IrDA/USB cable is needed to establish

communication between the CO-04C and the Datalogging Program or the Setup Program.

Belt Clip

Figure 4: Belt Clip

Figure 5: Calibration Cup

14 • Chapter 3: Measuring Mode 04 Series for CO(-H2)

Chapter 3: Measuring Mode

Overview

This chapter explains how to use the CO-04C to perform confined space entry monitoring or

general area monitoring in Measuring Mode.

Start Up

This section explains how to start up the CO-04C, get it ready for operation, and turn it off.

Turning On the CO-04C

To illustrate certain functions, the following description of the CO-04C start up sequence

assumes that the following items in User Mode are turned on: LUNCH, CAL.RMDR, and

BP.RMDR in User Mode, and ID DISP and A.ZERO in Maintenance Mode. If any of these

items are turned off, then the corresponding screens do not appear.

1. Press and briefly hold down POWER MODE. Release the button when you hear a beep.

2. If LUNCH is set to ON (factory setting if OFF, see pg.59), the Lunch Break Screen

appears. The unit counts down from 5 seconds.

a. Continue Accumulating: To continue accumulating peak and time-weighted average

(TWA) readings from the last time the CO-04C was used, press and release POWER

MODE or allow the countdown to reach 0. The short-term exposure limit (STEL)

reading is reset each time the CO-04C is turned on.

b. Reset Accumulation: To reset the accumulation of peak and time-weighted average

(TWA) readings, press and release AIR before the countdown reaches 0.

5

SEC

RESUME

5

SEC

YES .MODE

5

SEC

NO .AIR

04 Series for CO(-H2) Chapter 3: Measuring Mode • 15

3. If CAL.RMDR is set to ON (factory setting) and a calibration is due, the screen that

appears next depends on how CAL.EXPD is set in User Mode (see pg.53). The three

possible screens are described below. If a calibration is not due, the instrument displays

the number of days left until a calibration is due.

CAL.EXPD set to

CONFIRM (factory setting)

CAL.EXPD set to

CANT.USE

CAL.EXPD set to

NONE

LCD

Sound Buzzer sounds double pulsing

tone

Buzzer sounds double pulsing

tone

None

Action • Option A, Perform calibration

:

Press and release POWER

MODE to enter User Mode

and perform a calibration. The

instrument takes you straight

to the calibration start screen

in User Mode’s GAS CAL\A-

CAL(E-CAL) item (if

Password Protection is set to

On using the 04 Series Setup

Program, you must enter a

password first). See pg.42 for

calibration instructions.

If the calibration is success-

ful, the screen above will not

appear again until the unit is

due for calibration. If the cali-

bration is not successful, the

screen above will again appear

in the startup sequence.

• Option B, Bypass message

: To

continue without performing a

calibration, press and release

AIR.

The CO-04C cannot be used until

a successful calibration is per-

formed. Press and release

POWER MODE to enter User

Mode and perform a calibration.

The instrument takes you straight

to the calibration start screen in

User Mode’s GAS CAL/A-CAL

(E-CAL) item (if Password Pro-

tection is set to On using the 04

Series Setup Program, you must

enter a password first). If you

don’t press POWER MODE, the

instrument automatically goes to

the calibration start screen after 6

seconds (if Password Protec-

tion is set to On using the 04

Series Setup Program, you must

enter a password first). See pg.42

for calibration instructions.

If the calibration is successful,

the screen above will not appear

again until the unit is due for cali-

bration. If the calibration is not

successful, the screen above will

again appear in the startup

sequence.

• Option A, Perform calibration

:

If you want to enter User

Mode and perform a

calibration, press and release

POWER MODE. The

instrument takes you straight

to the calibration start screen

in User Mode’s GAS CAL/A-

CAL (E-CAL) item (if

Password Protection is set to

On using the 04 Series Setup

Program, you must enter a

password first).

• Option B, Bypass message

:

To continue without

performing a calibration, wait

a few seconds for the

instrument to continue with its

startup sequence.

CAL

CAL - LMT

FAIL

CAL - LMT

0

d

NEXT .CAL

16 • Chapter 3: Measuring Mode 04 Series for CO(-H2)

4. If BP.RMDR is set to ON (factory setting is OFF) and a bump test is due, the screen that

appears next depends on how BP.EXPD is set in User Mode (see pg.56). The three

possible screens are described below. If a bump test is not due, the instrument displays the

number of days left until a bump test is due.

5. The Date/Time Screen appears for a few seconds.

BP.EXPD set to

CONFIRM (factory setting)

BP.EXPD set to

CANT.USE

BP.EXPD set to

NONE

LCD

Sound Buzzer sounds double pulsing

tone

Buzzer sounds double pulsing

tone

None

Action • Option A, Perform bump test

:

Press and release POWER

MODE to enter User Mode

and perform a bump test. The

instrument takes you straight

to the bump test start screen in

User Mode’s BUMP item (if

Password Protection is set to

On using the 04 Series Setup

Program, you must enter a

password first). See pg.38 for

bump test instructions.

If the bump test is successful,

the screen above will not

appear again until the unit is

due for bump testing. If the

bump test is not successful,

the screen above will again

appear in the startup sequence.

• Option B, Bypass message

: To

continue without performing a

bump test, press and release

AIR.

The CO-04C cannot be used

until a successful bump test is

performed. Press and release

POWER MODE to enter User

Mode and perform a bump test.

The instrument takes you

straight to the bump test start

screen in User Mode’s BUMP

item (if Password Protection is

set to On using the 04 Series

Setup Program, you must enter a

password first). If you don’t

press POWER MODE, the

instrument automatically goes to

the bump test start screen after 6

seconds (if Password Protec-

tion is set to On using the 04

Series Setup Program, you must

enter a password first). See

pg.38 for bump test instructions.

If the bump test is successful, the

screen above will not appear

again until the unit is due for

bump testing. If the bump test is

not successful, the screen above

will again appear in the startup

sequence.

• Option A, Perform bump test

:

If you want to enter User

Mode and perform a bump

test, press and release

POWER MODE. The

instrument takes you straight

to the bump test start screen in

User Mode’s BUMP item (if

Password Protection is set to

On using the 04 Series Setup

Program, you must enter a

password first).

• Option B, Bypass message

:

To continue without

performing a bump test, wait

a few seconds for the

instrument to continue with its

startup sequence.

CAL

BP - LMT

FAIL

BP - LMT

0

d

NEXT .BP

2020

4.21

10:40

04 Series for CO(-H2) Chapter 3: Measuring Mode • 17

6. The Battery Voltage Screen appears for a few seconds. An “AL-L” at the bottom of the

screen indicates that the alarms are set to latching. An “AL-A” at the bottom of the screen

indicates that the alarms are set to auto reset. See pg.82 for a description of how to change

this parameter.

7. The following screens display for 1 second each: Gas Name, Full Scale, Warning Setpoint,

Alarm Setpoint, Alarm H Setpoint, STEL Setpoint, and TWA Setpoint.

8. If ID DISP is set to ON (factory setting is OFF, see pg.83), the User ID Screen appears

for a few seconds, followed by the Station ID Screen.

9. If the CO-04C 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.

You cannot acknowledge the failure and continue to Measuring Mode. Replace the failed

sensor as soon as possible.

batt

2.8

AL -L

v

CO

2000

F . S .

ppm

CO

25

WARNING

ppm

CO

ppm

CO

50

ALARM

ppm

CO

1200

ALARM H

ppm

CO

200

STEL

ppm

CO

25

TWA

ppm

USER

ID

U_ID_001

STN

ID

S_ID_001

CO

FAIL

SENSOR

ppm

18 • Chapter 3: Measuring Mode 04 Series for CO(-H2)

10. If A.ZERO is set to ON (factory setting is OFF, see pg.83), the instrument prompts you to

do an auto zero. An auto zero operation sets the reading to 0 ppm.

WARNING: Make sure that the instrument is in a known fresh air environment (an

environment free of combustible or toxic gases and of normal oxygen

content, 20.9%) before performing an auto zero operation. If you perform

an auto zero operation in an area with gases present, the adjustment will

not be accurate.

You must press and release the POWER MODE button to perform an auto zero function.

If you do not press any key, after 15 seconds, the instrument enters Measuring Mode

without performing an auto zero.

If Password Protection is turned On (factory setting is Off) using the 04 Series Setup

Program, a user-set password is required to perform an auto zero. When the password

screen appears, adjust each digit with the AIR button and press and release the POWER

MODE button to move on to the next digit. Once the password is entered, the instrument

performs the auto zero.

11. The CO-04C is now monitoring for gas in Measuring Mode. The Measuring Mode Screen

displays the current gas reading.

Performing a Demand Zero

Perform a demand zero before using the CO-04C. This sets the reading to 0 ppm.

1. Find a fresh-air environment. This is an environment free of toxic or combustible gases

and of normal oxygen content (20.9%).

2. Turn on the unit as described above in “Turning On the CO-04C”.

3. Press and hold AIR. The buzzer pulses and the LCD prompts you to continue holding AIR

(if KEY.TONE is set to ON in User Mode).

4. Continue to hold AIR until the LCD prompts you to release it. The CO-04C sets the fresh

air reading. Start up is complete and the unit is now ready for monitoring.

A .ZERO

YES .MODE

NO .AIR

0000

PASS-W

CO

0

ppm

04 Series for CO(-H2) Chapter 3: Measuring Mode • 19

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. When the password

screen appears, adjust each digit with the AIR button and press and release the POWER

MODE button to move on to the next digit. Once the password is entered, the instrument

sets the fresh air reading.

Turning Off the CO-04C

1. Press and hold POWER MODE.

2. OFF appears on the display and the buzzer pulses for about five seconds (if KEY.TONE

is set to ON in User Mode).

3. Release the button when OFF disappears from the display.

4. If Password Protection is turned On (factory setting is Off) using the 04 Series Setup

Program, a user-set password is required to turn off the CO-04C. When the password

screen appears, adjust each digit with the AIR button and press and release the POWER

MODE button to move on to the next digit. Once the password is entered, the instrument

shuts off.

0000

PASS-W

0000

PASS-W

20 • Chapter 3: Measuring Mode 04 Series for CO(-H2)

Measuring Mode Operation

When the CO-04C completes its startup sequence, it is in Measuring Mode. In Measuring

Mode the CO-04C continuously monitors the sampled atmosphere and displays the gas

concentration. The CO-04C is in Normal Operation if there are no alarm indications.

Heart Symbol: The heart symbol in the top right corner of the LCD indicates the operation

status and flashes when normal. A microprocessor error causes the heart symbol to stop

flashing or to disappear.

Check Mark: If BP.RMDR is set to ON and if a bump test is not due, a check mark appears in

the lower left corner of the LCD.

“S”

: If the instrument is operating in Stealth Mode, an “S.” appears at the bottom of the LCD.

Backlight: In a low-light environment, press and release either button to turn on the display

backlight. See pg.61 to program backlight duration.

Confirmation/Non-Compliance Indicator

: If the BEEP item in User Mode is set to anything

other than OFF, the CO-04C gives periodic indications to confirm that it’s operating or to

indicate a non-compliance (see pg.59).

Monitoring an Area

1. Start up the CO-04C as described above in “Start Up” on page 14. It is now in Measuring

Mode.

2. The instrument displays the CO reading. The H

2

reading is not displayed but “H2 RICH”

appears once the H

2

concentration rises above 2000 ppm.

3. Take the CO-04C to the monitoring area.

4. Wait at least 15 seconds.

5. If a reading is observed, allow the reading to stabilize to determine the gas concentration

present.

6. If a gas alarm occurs, take appropriate action. See pg.23.

CO

0

S.

ppm

CO

0

ppm

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