RKI Instruments 73-0079 User manual

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SC-04

Operator’s Manual

Part Number: 71-0548

Revision: 0

Released: 1/5/23

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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.

2 • SC-04 Operator’s Manual

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Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

About the SC-04 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Chapter 2: Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Instrument Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Alarm LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Vibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Infrared Communications Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Alligator Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Belt Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Calibration Cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

IrDA/USB Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Chapter 3: Measuring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Turning On the SC-04 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Performing a Demand Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Turning Off the SC-04 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

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Measuring Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Monitoring an Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Responding to Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Data Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Chapter 4: Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Tips for Using Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Peak Screen (PEAK). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

STEL Screen (STEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

TWA Screen (TWA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

User ID Screen (USER ID). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Station ID Screen (STN ID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Last Successful Calibration Date (CAL.DATA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Last Successful Bump Test Screen (BP.DATA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Date/Time Screen (DATE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Temperature Screen (TEMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Alarm Points Screen (ALARM--P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Adjusting the Buzzer Volume (BUZZ.VOL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Chapter 5: User Mode and Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Entering User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Tips for Using User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Performing a Bump Test (BUMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Performing a Calibration (GAS CAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Setting Calibration Parameters (CAL SET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Setting Bump Test Parameters (BUMP.SET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Alarm Settings (ALARM--P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Updating the Lunch Break Setting (LUNCH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Setting the Confirmation Beep and Non-Compliance Indicator (BEEP) . . . . . . . . . . . . . . . . 66

Updating the Backlight Time (BL TIME). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Turning the Key Tone On/Off (KEY.TONE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

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Display Mode Items (DISP.SET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Zero Suppression (ZERO.SUP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Zero Follower (ZERO.FLW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Turning Easy Calibration On/Off (E-CAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Setting the Date/Time (DATE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Turning the Password On/Off (PASS-W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Viewing the ROM/SUM (ROM/SUM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Entering Measuring Mode (START) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Chapter 6: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Replacing the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Replacing the Sensor Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Replacing the Hydrophobic Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Replacing the Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Chapter 7: General Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Appendix A: Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Entering Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Tips for Using Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Performing a Calibration (GAS CAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Performing a Gas Test (GAS.TEST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Sensor/Battery Replacement Date (SEN.DATE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Performing a Bump Test (BUMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Setting Alarms to Latching or Self-Resetting (LATCH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Turning the Demand Zero Function On/Off (D.ZERO). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Turning the Auto Zero Function On/Off (A.ZERO). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Turning the ID Display Function On/Off (ID DISP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Turning the Zero Suppression On/Off (ZERO.SUP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Turning the Zero Follower On/Off (ZERO.FLW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

User Mode Zero Suppression (ZSUP.DSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

User Mode Zero Follower (ZFLW.DSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

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Cylinder Setting (CYL.DISP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Setting the Date/Time (DATE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Turning the Password On/Off (PASS-W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Viewing the ROM/SUM (ROM/SUM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Performing a Default (M.DEF). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Entering Measuring Mode (START) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Appendix B: Gas Select Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Entering Gas Select Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Tips for Using Gas Select Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Saving the Alarm Points (SAVE-AP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Turning the Calibration Max Span On/Off (MAX.SPAN) . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Stealth and Vibrator Settings (STEALTH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Exiting Gas Select Mode (START). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Appendix C: Interference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

ESR-A13D-HCN, HCN Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

ESR-A13D-NO2, NO2 Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

ESR-A13D-PH3, PH3 Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

ESR-A13D-SO2, SO2 Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

ESR-B134-NH3, NH3 Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

ESR-B136-CL2, Cl2 Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

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 • SC-04 Operator’s Manual

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Chapter 1: Introduction

Overview

This chapter briefly describes the SC-04 gas monitor. This chapter also describes the

SC-04 Operator’s Manual (this document). Table 2 at the end of this chapter lists the specifications for the SC-04.

About the SC-04

Using an advanced detection system, the SC-04 personal gas monitor detects the presence of super toxic gases like HCN, PH3, and SO2. The SC-04’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 SC-04 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 SC-04 detects elevated levels of super toxic gases which can be dangerous or

life threatening. When using the SC-04, 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 SC-04 as described in this manual.

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AVERTISSEMENT: Le SC-04 détecte les niveaux élevés de gaz super toxiques qui peuvent

Specifications

Table 1: Standard Sensor Specifications/Alarm Points

être dangereux ou mettre la vie en danger. Lorsque vous utilisez le SC04, 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 SC-04 comme décrit dans ce manuel.

Detection Range

Lowest Detectable Limit (LDL)

Reading Increment

Warning Setpoint

Alarm Setpoint

Alarm H Setpoint

STEL Setpoint

Ammonia

)

(NH

0 - 400.0 ppm 0 - 20.00

4.0 ppm 0.10 ppm 1.0 ppm 0.30 ppm 0.02 ppm 0.20 ppm

0.5 ppm 0.05 ppm 0.1 ppm 0.05 ppm 0.01 ppm 0.05 ppm

25 ppm 1.00 ppm 5.0 ppm 2.00 ppm 0.30 ppm 2.00 ppm

35 ppm 2.00 ppm 10.0 ppm 4.00 ppm 0.60 ppm 5.00 ppm

300 ppm 10.00

35 ppm 1 ppm 10.0 ppm 1.00 ppm 1.00 ppm 5.00 ppm

Chlorine (Cl2)

ppm

Hydrogen Cyanide (HCN)

0 - 30.0 ppm 0 - 20.00

30.0 ppm 20.00 ppm 0.60 ppm 100.00

Nitrogen Dioxide (NO

)

ppm

Phosphine

)

(PH

0 - 20.00 ppm

Sulfur Dioxide (SO

)

0 - 100.00 ppm

ppm

TWA Setpoint

Sampling

25 ppm 0.5 ppm 4.7 ppm 0.50 ppm 0.30 ppm 2.00 ppm

Table 2: SC-04 Specifications

Diffusion

Method

Response

T90 Within 10 Seconds

Time

Display

Operating Temperature

Graphics LCD Display

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

& Humidity

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Indication Accuracy

Safety/ Regulatory

± 10% of reading or ± 5% of full scale (whichever is greater)

• 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

Power Supply

Continuous Operating Hours @ 25 °C

Case

Standard Accessories

Optional Accessories

• Operating Voltage: 3.0V

• Operating Current: 1.0 mA

• Operating Power: 3.0 mW

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)

Alkaline Batteries: 3,000 hours in Measuring Mode (Non Alarm Operation, Fully Charged)

Ni-MH Batteries: 2,000 hours in Measuring Mode (Non Alarm Operation, Fully Charged)

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

• Alligator clip

• Rubber boot

• Belt clip

• Calibration cup

• Datalogging and Setup Programs (Windows 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)

7, 8, 10, and 11), available at

Dimensions and Weight

SC-0 4 Operator’s Manual Chapter 1: Introduction • 9

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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.)

www.GlobalTestSupply.com

About this Manual

The SC-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.

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

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Chapter 2: Description

Battery Cover Screw

Battery Cover

AIR

SO2

LCD

Buzzer Openi ng

IrDA Port

Cont rol Buttons

W rist Strap

Connection

POW ER

MODE

Diffusion Port

Alarm LED

Figure 1: Component Location

Overview

This chapter describes the SC-04 instrument and its accessories.

Instrument Description

Case

The SC-04’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 SC-04’s operating modes.

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Control Buttons

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

Table 3: SC-04 Control Button Functions

Button Function(s)

AIR

POWER MODE

• 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 SC-04’s fresh air reading)

• changes the value of a parameter available for adjustment

• scrolls through parameter options

• turns the SC-04 on and off

• turns on LCD backlight

• enters and scrolls through Display Mode

• enters instructions into the SC-04’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

Alarm LED

The alarm LED above the sensor and buzzer openings alerts 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 SC-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 page 101).

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Sensor

The 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 SC-04’s circuitry amplifies the current, converts the current to a gas concentration, and displays the concentration on the LCD.

Each target gas has its own sensor.

Filters

NO2 and SO2 Sensors’ H2S Removal Filter Disk (Tan)

An H2S removal filter disk is placed into a recess in the sensor gasket over the NO2 or SO2 sensor. The filter disk prolongs the life of the sensors by preventing H2S in the ambient air from reaching the sensor. The filter should be replaced every 6 months.

HCN Sensor H2S Removal Filter Disk (Dark Gray)

An H2S removal filter disk is placed into a recess in the sensor gasket over the HCN sensor. The filter disk prolongs the life of the sensors by preventing H sensor. The filter should be replaced every 6 months.

PH3 Sensor Humidity Filter (White)

S in the ambient air from reaching the

A white humidity filter is placed into a recess in the sensor gasket over the PH3 sensor. The filter absorbs humidity in the sampling environment to prevent unstable readings around 0 ppm. The filter should be replaced every 6 months.

NH3 Sensor’s Humidity Filter (White)

A white humidity filter is placed into a recess in the filter gasket over the NH3 sensor. The filter absorbs humidity in the sampling environment to prevent unstable readings around 0 ppm. The filter should be replaced every 6 months.

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 SC-04. At 25°C alkaline batteries will last at least 3,000 hours (125 days) and Ni-MH batteries will last at least 2,000 hours (83 days). The battery icon in the upper right of the LCD shows remaining battery life.

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A low battery warning activates when the SC-04 detects a low battery voltage. The SC-04 sounds

Open

Alligator Clip

Closed

Figure 2: Alligator Clip

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 SC-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.

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

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

Standard Accessories

Alligator Clip

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

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Protective Rubber Boot

Side Front

Figure 3: Rubber Boot

Belt Clip

Figure 4: Belt Clip

A protective rubber boot is installed over the SC-04.

Optional Accessories

Belt Clip

The belt clip installs to 2 spring bars on the rear case and is used to easily clip the SC-04 onto a belt.

Wrist Strap

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

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Calibration Cup

Figure 5: 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 SC-04 and the Datalogging Program or the Setup Program.

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Chapter 3: Measuring Mode

5 SEC

RESUME

5 SEC

YES .MODE

5 SEC

NO .AIR

Overview

This chapter explains how to use the SC-04 to perform confined space entry monitoring or general area monitoring in Measuring Mode.

Start Up

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

Turning On the SC-04

To illustrate certain functions, the following description of the SC-04 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 page 65), 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 SC-04 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 SC-04 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.

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 page 58). 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.

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LCD

CAL

CAL - LMT

FAIL

CAL - LMT

0 d

NEXT .CAL

CAL.EXPD set to CONFIRM (factory setting)

CAL.EXPD set to CANT.USE

CAL.EXPD set to NONE

Sound Buzzer sounds double pulsing

tone

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 page 46 for calibration instructions.

If the calibration is successful, the screen above will not appear again until the unit is due for calibration. If the calibration 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.

Buzzer sounds double puls-

ing tone

The SC-04 cannot be used until a successful calibration is performed. Press and release POWER MODE to enter User Mode and perform a calibration. The instrument

takes you straight to the cali-

bration 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). If you don’t press

POWER MODE, the instru-

ment automatically goes to the calibration start screen after 6 seconds (if Password Protection is set to On using the 04 Series Setup Program, you must enter a password

first). See page 46 for calibra-

tion instructions. If the calibration is successful,

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.

None

• 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/ACAL (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.

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 page 62). 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.

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LCD

CAL

BP - LMT

FAIL

BP - LMT

0 d

NEXT .BP

2020

4.21

10:40

BP.EXPD set to CONFIRM (factory setting)

BP.EXPD set to CANT.USE

BP.EXPD set to NONE

Sound Buzzer sounds double pulsing

tone

Actio n

• 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 page 42 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.

Buzzer sounds double puls-

ing tone

The SC-04 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 Pass-

word 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 Protection is set to On using the 04 Series Setup Program, you must enter a password first). See page 42 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.

None

• 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.

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

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SC-0 4 Operator’s Manual Chapter 3: Measuring Mode • 19

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

batt

2.8

AL -L

SO2

100.00

F . S .

ppm

SO2

2.00

WARNING

ppm

SO2

ppm

SO2

5.00

ALARM

ppm

SO2

100.00

ALARM H

ppm

SO2

5.00

STEL

ppm

SO2

2.00

TWA

ppm

USER ID

U_ID_001

STN ID

S_ID_001

SO2 FAIL

SENSOR

ppm

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 page 92 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 page 93), the User ID Screen appears for a few seconds, followed by the Station ID Screen.

9. If the SC-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.

You cannot acknowledge the failure and continue to Measuring Mode. Replace the failed sensor as soon as possible.

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10. If A.ZERO is set to ON (factory setting is OFF, see page 93), the instrument prompts you to

A .ZERO

YES .MODE

NO .AIR

0000

PASS- W

SO2 0

ppm

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 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 SC-04 is now monitoring for gas in Measuring Mode. The Measuring Mode Screen displays the current gas reading.

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

SC-0 4 Operator’s Manual Chapter 3: Measuring Mode • 21

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Performing a Demand Zero

0000

PASS- W

0000

PASS- W

Perform a demand zero before using the SC-04. 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 SC-04.

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 SC-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. 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 SC-04

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 SC-04. 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.

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Measuring Mode Operation

SO2

0.00

ppm

SO2

0.00

ppm

When the SC-04 completes its startup sequence, it is in Measuring Mode. In Measuring Mode the SC-04 continuously monitors the sampled atmosphere and displays the gas concentration. The SC-04 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 page 67 to program backlight duration.

Confirmation/Non-Compliance Indicator: If the BEEP item in User Mode is set to anything other than OFF, the SC-04 gives periodic indications to confirm that it’s operating or to indicate a noncompliance (see page 66).

Monitoring an Area

1. Start up the SC-04 as described above in “Start Up” on page 17. It is now in Measuring Mode.

2. The instrument displays the gas reading.

3. Take the SC-04 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 page 26.

Interference Information

Some gases interfere with the super toxic sensors. For a complete list of these gases, see page 102.

SC-0 4 Operator’s Manual Chapter 3: Measuring Mode • 23

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Alarms

This section covers alarm indications in Measuring Mode. It also describes how to reset the SC-04 after an alarm occurs and how to respond to an alarm condition.

NOTE: False alarms may be caused by radio frequency (RF) or electromagnetic (EMI)

Alarm Indications

The SC-04 buzzer sounds an alarm, the LED flashes, and the vibrator pulses when any sort of alarm condition or failure occurs. If the SC-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. See page 101 for more information.

NOTE: If an alarm condition occurs while you are in Display Mode, the SC-04 automatically

The table below summarizes the types of alarms produced by the SC-04 and their indications.

interference. Keep the SC-04 away from RF and EMI sources such as radio transmitters or large motors.

returns to the Measuring Mode screen.

Table 4: Alarm Types and Indications

Alarm Type Visual Indications Other Indications

War ning Concentration of gas rises above

the Warning setting.

Alarm Concentration of gas rises above

the Alarm setting.

Alarm H Concentration of gas rises above

the Alarm H setting.

• Gas reading flashes

• WARNING appears at the bottom of the LCD

• Alarm LED flashes once per second

• Backlight turns on

• Gas reading flashes

• ALARM appears at the bottom of the LCD

• Alarm LED flashes twice per second

• Backlight turns on

• Gas reading flashes

• ALARM H appears at the bottom of the LCD

• Alarm LED flashes twice per second

• High-low tone sounds once per second

• Vibrator pulses once per second

• High-low tone sounds twice per second

• Vibrator pulses twice per second

• High-low tone sounds twice per second

• Vibrator pulses twice per second

• Backlight turns on

24 • Chapter 3: Measuring Mode SC-04 Operator’s Manual

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Table 4: Alarm Types and Indications

Alarm Type Visual Indications Other Indications

TWA or STEL Concentration rises above the

TWA or STEL alarm setting.

Over Range

Minus Over Range

• Gas reading flashes

• TWA or STEL appears at the bottom of the LCD

• Alarm LED flashes once per second

• Backlight turns on

• Gas reading is replaced with a flashing

• Gas name and units flash

• OVER appears at the bottom of the LCD

• Alarm LED flashes twice per second

• Backlight turns on

• Affected channel’s gas reading is replaced with a flashing “

• Gas name and units flash

• M OVER appears at the bottom of the LCD

- - - -”

• High-low tone sounds once per second

• Vibrator pulses once per second

• High-low tone sounds twice per second

• Vibrator pulses twice per second

• High-low tone sounds twice per second

• Vibrator pulses twice per second

Low Battery Warning

Dead Battery Alarm

Sensor Failure

Clock Failure

• Alarm LED flashes twice per second

• Backlight turns on

• The last bar in the battery icon starts flashing

• Gas reading disappears. FAIL BATTERY appears on the LCD.

• Alarm LED flashes once per second

• FAI L S ENSOR appears on the LCD.

• Alarm LED flashes once per second

• FAIL 050 CLOCK appears on the LCD

• Alarm LED flashes once per second

None

Double pulsing tone sounds once per second

SC-0 4 Operator’s Manual Chapter 3: Measuring Mode • 25

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Table 4: Alarm Types and Indications

0000

PASS- W

Alarm Type Visual Indications Other Indications

System Failure

• FAIL SYSTEM and an error code appear on the LCD

• Alarm LED flashes once per second

Double pulsing tone sounds once per second

Responding to Alarms

This section describes response to gas, over range, battery, sensor failure, clock failure, and system failure alarms.

Responding to Gas Alarms

1. Follow your established procedure for an increasing gas condition.

2. Reset the alarm as necessary or allowed. a. If LATCH is set to ON (factory setting) in Maintenance Mode, the gas reading must fall

below an alarm setting before you can reset the alarm condition using POWER MODE or AIR.

If Password Protection is turned On (factory setting is Off) using the 04 Series Setup Program, you must press POWER MODE and AIR at the same time and then enter a user-set password to reset an alarm condition. 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 alarm condition resets.

b. If LATCH is set to OFF in Maintenance Mode, the alarm condition automatically resets

when gas reading falls below an alarm setpoint.

Responding to Over Range Alarms

WARNING: An over range condition may indicate an extreme carbon monoxide

concentration or an explosive concentration. Confirm the gas concentration with a different SC-04 or with another gas detecting device.

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 SC-04 différent ou avec un autre dispositif de détection de gaz.

1. Follow your established procedure for an extreme gas condition.

26 • Chapter 3: Measuring Mode SC-04 Operator’s Manual

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2. Reset the alarm using POWER MODE or AIR once the alarm condition clears if LATCH is

0000

PASS- W

set to ON (factory setting) in Maintenance Mode.

If Password Protection is turned On (factory setting is Off) using the 04 Series Setup Program, you must press POWER MODE and AIR at the same time and then enter a userset password to reset an alarm condition. 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 alarm condition resets.

3. Calibrate the SC-04 as described on page 46.

4. If the over range condition continues or if you are not able to successfully calibrate the unit,

you may need to replace the sensor.

5. If the over range condition continues after you replace the sensor, contact RKI Instruments,

Inc. for further instructions.

Responding to Battery Alarms

WARNING: The SC-04 is not operational as a gas monitoring device during a dead battery

alarm. Take the SC-04 to a non-hazardous area and replace the batteries as described in “Replacing the Batteries (Alkaline or Ni-MH)” on page 74.

The SC-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. Replace the batteries as described on page 74 as soon as possible.

NOTE: Alarms and the LCD backlight consume battery power and reduce the amount of

operating time remaining.

Responding to Sensor Failure Alarms

1. Calibrate the sensor as described on page 46.

2. If the sensor failure continues, replace the sensor as described on page 81.

3. If the sensor failure condition continues after replacing the sensor, contact RKI Instruments,

Inc. for further instructions.

SC-0 4 Operator’s Manual Chapter 3: Measuring Mode • 27

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Responding to Clock Failure Alarms

FAIL 050

CLOCK

FAIL 031

SYSTEM

A clock failure alarm occurs if the unit’s internal clock malfunctions.

1. Press and release POWER MODE to continue into Measuring Mode.

CAUTION: There is no datalogging function if you operate the instrument after a

clock failure.

2. Attempt to set the date using the DATE item in User Mode (see page 70).

3. If the date cannot be set correctly, contact RKI Instruments, Inc. as soon as possible.

Responding to System Failure Alarms

1. If a system failure occurs, the system failure screen displays an error code as shown below.

2. The error code meanings are shown in the table below:

Table 5: Error Code Explanation

Error Code Explanation

000 ROM failure

010 RAM failure

020 FRAM failure

031 FLASH memory failure

082 Temperature sensor failure

3. If the error code is anything but 031, the instrument cannot be used. Contact RKI Instruments,

Inc. as soon as possible.

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.

28 • Chapter 3: Measuring Mode SC-04 Operator’s Manual

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Data Logging

The SC-04 logs Measuring Mode gas readings, alarm data, and calibration data to its internal memory. 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 SC-04 stores data and how often the SC-04 is turned on and off. The table below illustrates how much data logging time is available for the various interval times. It assumes that the unit is only turned on once and there are no alarms. The data logging interval time must be set using the 04 Series Datalogging Program.

Table 6: Data Logging Capacity

Interval Time

10 seconds 10 hours

20 seconds 20 hours

30 seconds 30 hours

1 minute 60 hours

3 minutes 180 hours

5 minutes 300 hours

10 minutes 600 hours

Data Logging Capacity

To utilize the SC-04’s downloading capability, you need:

• PC with Windows 7, Windows 8, Windows 10, or Windows 11

• IrDA port or IrDA/USB cable (cable available from RKI Instruments, Inc.)

• 04 Series Datalogging Program (available at www.rkiinstruments.com/04series).

For a complete description of the Datalogging Program and procedures for downloading data to a computer, see the 04 Series Datalogging Program Operator’s Manual.

SC-0 4 Operator’s Manual Chapter 3: Measuring Mode • 29

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Chapter 4: Display Mode

This section describes Display Mode which is accessible from Measuring Mode. See Table 7 below for a list of Display Mode’s menu items, a short description of each item, and the page number for further description.

Table 7: Display Mode Menu Items

Display Mode Menu Item

PEAK (page 31) Displays the Peak reading.

STEL (page 32) Displays the STEL reading.

TWA (page 32) Displays the TWA reading.

USER ID (page 32)

STN ID (page 33)

CAL.DATA (page

34)

BP.DATA (page 34)

DATE (page 35) Displays the current date and time.

TEMP (page 35) Displays the current temperature.

ALARM--P (page

35)

Description

View and/or change the User ID.

View and/or change the Station ID.

Displays the last calibration date.

Displays the last bump test date.

View alarm points.

BUZZ.VOL (page 36)

Only appears if DISP.SET is set to ON in User Mode (factory setting) and if ID DISP is set to ON in

Maintenance Mode (factory setting is OFF).

Only appears if CAL.RMDR is set to ON in User Mode (factory setting).

Only appears if BP.RMDR is set to ON in User Mode (factory setting is OFF).

Only appears if DISP.SET is set to ON in User Mode (factory setting).

Set the buzzer volume to LO or HI (factory setting).

Tips for Using Display Mode

• To enter Display Mode and scroll from one item to the next or skip an item when a question is

asked, press and release POWER MODE.

• To enter an item, press and release AIR.

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• To change a flashing parameter, press and release AIR. To reverse the movement in a list (ie.

SO2

20.00

PEAK

ppm

CLR

HOLD

CLR

RELEASE

from down to up or vice versa):

a. Press and hold AIR.

b. Immediately press POWER MODE and then release both buttons.

• To exit from an entered-information screen and go back to Measuring Mode, press and release

POWER MODE until you get to the Measuring Mode screen.

NOTE: Each screen displays for 20 seconds. If you do not press a button within 20 seconds, the

SC-04 automatically returns to Measuring Mode.

Peak Screen (PEAK)

The peak screen displays the highest concentration detected since the SC-04 was turned on. The peak reading is stored until a higher level is detected, the peak reading is cleared, or the SC-04 is turned off.

The lunch break feature enables the SC-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 page 17).

To clear the peak reading, do the following:

NOTE: If Password Protection is set to On using the 04 Series Setup Program, the peak

reading cannot be cleared.

1. After entering Display Mode, press and release POWER MODE until PEAK appears.

2. Press and hold AIR until the screen prompts you to release it.

3. The peak reading is reset and the unit returns to the Peak Screen.

If you do not want to clear the peak reading, release AIR before the above screen sequence occurs. The unit returns to the Peak Screen.

SC-0 4 Operator’s Manual Chapter 4: Display Mode • 31

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STEL Screen (STEL)

SO2

10.00

STEL

ppm

SO2

5.00

TWA

ppm

USER ID

U_ID_001

USER ID

CHG / AIR

USER ID

NO /MODE

The STEL Screen displays the short term exposure limit (STEL) reading. The STEL reading is the average reading over the last 15 minutes.

TWA Screen (TWA)

The TWA Screen displays the time weighted average (TWA) reading.

The TWA reading is the average reading over the last 8 hours. If 8 hours have not elapsed since the last time the TWA reading was cleared, the average is still calculated over 8 hours. The missing readings are assigned a value of 0. If LUNCH is set to OFF (factory setting), the TWA is cleared when the SC-04 is turned off.

If LUNCH is set to ON, the SC-04 remembers the TWA reading when it is turned off and can continue accumulation when it is turned on again (see page 17).

Changing the User ID (USER ID)

This screen only appears if DISP.SET in User Mode is set to ON (factory setting) and if ID 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 SC-04’s memory. Before a user ID is selected on a brand new instrument, the user ID is “----------”. The factoryinstalled user IDs have a “U_ID_XXX” format.

The user ID provides a way to identify the SC-04 user during a data logging session.

User IDs can only be selected the 04 Series Datalogging Program or 04 Series Setup Program.

1. After entering Display Mode, press and release POWER MODE until the USER ID screen

sequence appears.

in this menu item. In order to edit the 128 user IDs, you must use

32 • Chapter 4: Display Mode SC- 04 Operator’s Manual

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2. To change the User ID, press and release AIR. The current User ID flashes.

USER ID

U_ID_001

STN ID

S_ID_001

STN ID

CHG / AIR

STN ID

NO /MODE

STN ID

S_ID_001

3. Use AIR to scroll to the desired User ID.

4. Press and release POWER MODE to save the User ID and return to the USER ID screen in

Display Mode.

Changing the Station ID (STN ID)

This screen only appears if DISP.SET in User Mode is set to ON (factory setting) and if 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 SC-04’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 SC-04 location during a data logging session.

User IDs can only be selected in this menu item. In order to edit the 128 user IDs, you must use the 04 Series Datalogging Program or 04 Series Setup Program.

1. After entering Display Mode, press and release POWER MODE until the STN ID screen

sequence appears.

2. To change the Station ID, press and release AIR. The current Station ID flashes.

3. Use AIR to scroll to the desired Station ID.

4. Press and release POWER MODE to save the Station ID and return to the STN ID screen in

Display Mode.

SC-0 4 Operator’s Manual Chapter 4: Display Mode • 33

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Last Successful Calibration Date (CAL.DATA)

DISP

CAL .DATA

DISP

YES / AIR

DISP

NO /MODE

2019

10.24

CAL .DATA

DISP

BP .DATA

DISP

YES / AIR

DISP

NO /MODE

2019

10.24

BP .DATA

The CAL.DATA screen shows the date of the last successful calibration. This screen only appears if CAL.RMDR is set to ON (factory setting).

1. After entering Display Mode, press and release POWER MODE until the CAL.DATA screen

sequence appears.

2. Press AIR to enter the CAL.DATA screen. The date of the last successful calibration displays.

3. Press and release POWER MODE to return to the CAL.DATA screen in Display Mode.

Last Successful Bump Test Date (BP.DATA)

The BP.DATA screen shows the date of the last successful bump test. This screen only appears if 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.

2. Press AIR to enter the BP.DATA screen. The date of the last successful bump test displays.

34 • Chapter 4: Display Mode SC- 04 Operator’s Manual

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3. When you are done viewing the last bump test date, press and release POWER MODE to

return to the BP.DATA screen in Display Mode.

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Date/Time Screen (DATE)

2020

4.21

10:40

25C

TEMP

DISP

ALARM-P

DISP

YES / AIR

DISP

NO /MODE

The DATE screen shows the instrument’s date and time.

Temperature Screen (TEMP)

The TEMP screen shows the surrounding area’s temperature.

Alarm Points Screen (ALARM--P)

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.

2. Press and release AIR. The Full Scale Setting screen appears.

SC-0 4 Operator’s Manual Chapter 4: Display Mode • 35

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3. Use AIR to scroll through the Warning, Alarm, Alarm H, STEL, and TWA settings.

SO2

100.00

F. S.

ppm

SO2

2.00

WARNING

ppm

SO2

5.00

ALARM

ppm

SO2

100.00

ALARM H

ppm

SO2

5.00

STEL

ppm

SO2

2.00

TWA

ppm

AIR AIR

AIR

BUZZ .VOL

CHG / AIR

NO / MODE

4. While viewing the alarm settings for a particular alarm point, press and release AIR and

POWER MODE at the same time to simulate the alarm conditions. The buzzer will sound, the LED will flash, and the instrument will vibrate just as it would if the displayed condition was actually happening.

5. Press and release POWER MODE to return to the Alarm Points Screen.

Adjusting the Buzzer Volume (BUZZ.VOL)

The BUZZ.VOL screen allows you to adjust the volume of the instrument’s buzzer. This screen only appears if DISP.SET in User Mode is set to ON (factory setting).

HI (factory setting): Buzzer volume is high.

LO: Buzzer volume is low.

1. While in Display Mode, press and release POWER MODE until BUZZ.VOL appears. The

current setting displays on the top line.

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.

36 • Chapter 4: Display Mode SC- 04 Operator’s Manual

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Chapter 5: User Mode and Calibration

Overview

This section describes the SC-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.

Table 8: User Mode Menu Items

User Mode Menu Item

BUMP (page 42) Perform a bump test.

GAS CAL (page 46) Perform a fresh air adjustment, perform a span adjustment, change the calibration gas

Description

BUMP Perform a bump test.

START Begin the warmup sequence and enter Measuring Mode.

ESCAPE Return to the BUMP menu item.

concentration.

AIR (page 46) Perform a fresh air adjustment.

A-CAL (page

47) or E-CAL (page 51) depending on ECAL User Mode setting

A-CAL (or E-CAL)

START Begin the warmup sequence and enter Measuring

CAL-P Set the calibration gas concentration.

ESCAPE Return to the A-CAL item in the GAS CAL menu.

Perform a span adjustment.

Mode.

ESCAPE Return to the GAS CAL item in User Mode.

SC-0 4 Operator’s Manual Chapter 5: User Mode and Calibration • 37

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Table 8: User Mode Menu Items

User Mode Menu Item

CAL SET (page 57) Change parameters related to calibration.

Description

CAL.RMDR (page 57)

CAL.INT (page

57)

CAL.EXPD (page 58)

ON (factory setting) when a calibration is due. Notification type depends on CAL.EXPD setting below. CAL.DATA screen appears in Display Mode.

OFF

: No notification upon startup when a calibration is due.

CAL.DATA screen does not appear in Display Mode.

How often the instrument needs to be calibrated. Options: 1 - 1000 days (factory setting is 90 days)

Defines what action must be taken if a calibration is due upon startup.

CONFIRM (factory setting) edge that calibration is due and continue to Measuring Mode.

CANT.USE bration is performed.

NONE sequence continues.

: Cannot enter Measuring Mode until a successful cali-

: A screen indicates that calibration is due but warmup

: The instrument notifies the user upon startup

: Press and release AIR to acknowl-

BUMP.SET (page 59)

ESCAPE Return to the CAL SET item in User Mode.

Change parameters related to bump testing.

SETTING (page

59)

GAS.TIME How long gas is applied during a bump test.

Choices: 30 (factory setting), 45, 60, 90 seconds

CHECK Percentage of calibration gas concentration that

the bump test reading must be within in order to pass bump.

Options: 10%, 20%, 30%, 40%, 50% (factory set-

ting)

CAL.TIME How long gas is applied during a calibration.

GAS.TIME is deducted from this time. Options: 90 (factory setting) or 120 seconds

A-CAL ON (factory setting)

tion automatically starts. OFF

: If a bump test fails, a calibration does not

automatically start.

ESCAPE Return to the SETTING item in the BUMP SET

menu.

: If a bump test fails, a calibra-

38 • Chapter 5: User Mode and Calibration SC-04 Operator’s Manual

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Table 8: User Mode Menu Items

User Mode Menu Item

BUMP.SET (page 59) cont.

Description

BP.RMDR (page 61)

BP.INT (page

62)

BP.EXPD (page

62)

ESCAPE Return to the BUMP SET item in User Mode.

ON: The instrument notifies the user upon startup when a bump test is due. Notification type depends on BP.EXPD setting below. BP.DATA screen appears in Display Mode.

OFF (factory setting) test is due. BP.DATA screen does not appear in Display Mode.

How often the instrument needs to be bump tested. Options: 0 - 30 days (factory setting is 30 days)

Defines what action must be taken if a bump test is due upon startup.

CONFIRM (factory setting) edge that bump test is due and continue to Measuring Mode.

CANT.USE bump test is performed.

NONE sequence continues.

: Cannot enter Measuring Mode until a successful

: A screen indicates that bump test is due but warmup

: No notification upon startup when a bump

: Press and release AIR to acknowl-

ALARM-P (page 63) Set alarm points (WARNING, ALARM, ALARM H, STEL, TWA) and/or reset all

alarms to their default settings.

LUNCH (page 65) ON

BEEP (page 66) Set confirmation beep parameters.

: Lunch break feature is on. Instrument asks if you want to resume TWA and PEAK

readings at startup. OFF (factory setting)

readings every time it’s turned on.

BEEP.SEL (page 66)

: Lunch break feature is off. Instrument resets TWA and PEAK

: LED flashes and instrument vibrates based on interval

LED defined in BEEP.INT to confirm instrument is still operating.

BUZZER val defined in BEEP.INT to confirm instrument is still operating.

LED+BUZ based on interval defined in BEEP.INT to confirm instrument is still operating.

BMP/CAL bump test or calibration is due regardless of whether BP.RMDR and/or CAL.RMDR are set to ON.

OFF (factory setting) ating or that a bump test or calibration is due.

: Buzzer sounds and instrument vibrates based on inter-

: LED flashes, buzzer sounds, and instrument vibrates

: LED flashes based on interval defined in BEEP.INT if

: No alerts to confirm instrument is still oper-

SC-0 4 Operator’s Manual Chapter 5: User Mode and Calibration • 39

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Table 8: User Mode Menu Items

User Mode Menu Item

BEEP (page 66) cont.

Description

BEEP.INT (page 67)

Confirmation alert interval. Confirmation type defined in BEEP.SEL.

Options: 0.5 minute and 1 to 99 minutes in 1 minute increments. The factory setting is 5 minutes.

ESCAPE Return to the BEEP item in User Mode.

BL TIME (page 67) How long the back light stays on after the last button press.

Options: 0 - 255 seconds or OFF. The factory setting is 30 seconds.

KEY.TONE (page 68) ON (factory setting)

OFF

: Buzzer does not sound when button is pressed.

DISP.SET (page 68) OFF

: USER ID, STN ID, and BUZZ.VOL items do not appear in Display Mode.

ON (factory setting)

: Buzzer sounds when button is pressed.

: BUZZ.VOL item appears in Display Mode. USER ID and STN

ID items appear if ID DISP in Maintenance Mode is also set to ON.

ZERO.SUP (page 69)* ON (factory setting)

: 0.10 ppm

: Not intended for field adjustment. The suppression values are:

HCN: 0.5 ppm NH

: 4 ppm

: 0.30 ppm

: 0.02 ppm

: 0.20 ppm

ZERO.FLW (page 69)** ON (factory setting)

E-CAL (page 69) XX seconds

: E-CAL appears in GAS CAL instead of A-CAL.

OFF (factory setting)

: Not intended for field adjustment.

: E-CAL does not appear in GAS CAL.

DATE (page 70) Set the instrument’s date and time.

PASS-W (page 70) ON

: User Mode is password-protected. Factory-set password is 0405.

OFF (factory setting)

: User Mode is not password-protected.

ROM/SUM (page 71) View the firmware information for the SC-04’s sensor board and main board.

START (page 71) Press and release POWER MODE to begin the warmup sequence and enter Measuring

Mode.

* Only appears if ZSUP.DSP is set to ON in Maintenance Mode.

** Only appears if ZFLW.DSP is set to ON in Maintenance Mode.

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Entering User Mode

PASS-W set to OFF PASS-W set to ON

0000

PASS-W

BUMP

WARNING: The SC-04 is not in operation as a gas detector while in User Mode.

1. Take the SC-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.

3. The screen that appears depends on the setting of User Mode’s PASS-W item.

If PASS-W is set to OFF (factory setting), continue with Step 6.

If PASS-W is set to ON, continue with Step 4.

4. If PASS-W is set to ON in User Mode, a password screen appears and the first digit flashes.

The factory-set password is 0405 but it can be changed.

5. Use AIR to select each password number then press POWER MODE to save it and move on

to the next number. To go back a number, press and hold AIR and POWER MODE for a few seconds. To reverse the direction of change (ie. from increasing to decreasing or vice versa):

a. Press and hold AIR.

b. Immediately press POWER MODE and then release both buttons.

6. The BUMP item displays.

7. Use AIR to move through the User Mode items.

SC-0 4 Operator’s Manual Chapter 5: User Mode and Calibration • 41

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Tips for Using User Mode

• To scroll from one item to the next, press and release AIR. To reverse the scrolling direction:

a. Press and hold AIR.

b. Immediately press POWER MODE and then release both buttons.

c. The scrolling direction returns to the original direction when you exit and reenter a menu.

• 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.

• To change a flashing parameter, press and release AIR. To reverse the direction of change (ie.

from increasing to decreasing or vice versa):

a. 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.

Performing a Bump Test (BUMP)

Bump test the instrument before each day’s use with a known concentration of the target gas. The instrument does not need to be calibrated unless it does not pass the bump test.

To bump test the SC-04, you need:

• Calibration gas cylinder

Table 9: Calibration Concentration Limits

Channel

Ammonia 8 ppm 400 ppm

Chlorine 0.15 ppm 10.00 ppm

Hydrogen Cyanide 0.9 ppm 30.0 ppm

Nitrogen Dioxide 0.50 ppm 20.00 ppm

Phosphine 0.05 ppm 20.00 ppm

Sulfur Dioxide 0.50 ppm 100.00 ppm

• 0.25 LPM fixed flow regulator

Min. Cal. Gas Concentration

Max. Cal. Gas Concentration

• Non-absorbent tubing

• Calibration cup

1. Confirm that the SC-04’s calibration gas value matches the concentration listed on the

calibration gas cylinder as described on page 55.

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2. Install the calibration cup onto the SC-04. Be sure the calibration cup is installed in the correct

POWER

MODE

AIR

Front ViewSide View

BUMP

SO2

5.00

BUMP

ppm

SO2

0.00

BUMP 30

ppm

SO2

0.00

APLY 30

ppm

direction and that it is pushed on all the way.

3. Use the tubing to connect the regulator to the inlet of the calibration cup (labeled “IN”).

4. While in User Mode, press AIR to scroll to BUMP.

5. Press and release POWER MODE. The display shows the gas and its assigned calibration

value (see page 55 if the calibration value does not match the calibration gas cylinder’s concentration).

6. For toxic gas cylinders, it is important to vent the regulator while installing it onto the

cylinder. Venting the regulator during installation helps prevent air from getting into the cylinder and degrading the gas. Open the regulator by turning the knob counterclockwise and install it onto the cylinder.

7. Press and release POWER MODE.

8. The gas reading flashes, the bottom of the screen alternates between “APLY” and “BUMP”,

and the bottom of the screen counts down from the time set in BUMP.SET\SETTING\GAS.TIME.

To back out of the gas application screen without performing the bump test, press and release AIR and POWER MODE together.

SC-0 4 Operator’s Manual Chapter 5: User Mode and Calibration • 43

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9. At the end of the countdown, the instrument analyzes the results. Follow the flow chart to

Figure 6: Bump Test Flow Chart

Bump test passed?

Y N

A-CAL On?

Calibration passed?

Y N

(default is on)

C D

Y N

SO2 P

BMP / CAL

ppm

SO2

4.70

BMP /

ppm

AIR

SO2 F

BMP / CAL

ppm

SO2

0.90

BMP /

ppm

AIR

determine the bump test outcome.

Option A from Flow Chart Option B from Flow Chart

• Bump test passed • Bump test failed

• A-CAL set to OFF (factory setting is ON)

1. The instrument indicates that the channel passed the bump test. Use AIR to scroll between the bump test result and the bump test gas reading.

2. Close the regulator.

3. Unscrew the regulator.

4. Remove the calibration cup.

5. Press and release POWER MODE to return to the BUMP screen in the BUMP menu.

6. Use AIR to scroll to START and press and release POWER MODE to enter Measuring Mode.

1. The instrument shows which channels passed or failed the bump test. The LED flashes and the buzzer sounds. Use AIR to scroll between the result and the reading.

2. Close the regulator.

3. Unscrew the regulator.

4. Remove the calibration cup.

5. Press and release POWER MODE to return to the BUMP screen in the BUMP menu.

6. Use AIR to scroll to START and press and release POWER MODE to enter Measuring Mode.

7. Calibrate the SC-04 as soon as possible.

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Option C from Flow Chart Option D from Flow Chart

SO2

0.00

CAL 60

ppm

SO2

0.00

APLY 60

ppm

SO2 F P

BMP / CAL

ppm

SO2

0.90

BMP /

ppm

SO2

4.70

/ CAL

ppm

AIR

SO2

0.00

CAL 60

ppm

SO2

0.00

APLY 60

ppm

SO2 F F

BMP / CAL

ppm

SO2

0.00

BMP /

ppm

SO2

0.90

/ CAL

ppm

AIR

• Bump test failed

• A-CAL set to ON (factory setting)

• Calibration passed

1. A calibration immediately and automatically starts. Continue to apply the calibration gas.

2. The calibration time is the difference between the GAS.TIME and the CAL.TIME values defined in the BUMP.SET\SETTING item in User Mode.

3. The instrument shows the pass/fail results of the bump test/calibration. Use AIR to scroll between the results and the readings.

• Bump test failed

• A-CAL set to ON (factory setting)

• Calibration failed

1. A calibration immediately and automatically starts. Continue to apply the calibration gas.

2. The calibration time is the difference between the GAS.TIME and the CAL.TIME values defined in the BUMP.SET\SETTING item in User Mode.

3. The instrument shows the pass/fail results of the bump test/calibration. The LED flashes and the buzzer sounds. Use AIR to scroll between the results and the readings.

4. Close the regulator.

5. Unscrew the regulator.

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SC-0 4 Operator’s Manual Chapter 5: User Mode and Calibration • 45

6. Remove the calibration cup.

7. Press and release POWER MODE to return to the BUMP screen in the BUMP menu.

8. Use AIR to scroll to START and press and release POWER MODE to enter Measuring Mode.

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4. Close the regulator.

5. Unscrew the regulator.

6. Remove the calibration cup.

7. Press and release POWER MODE to return to the BUMP screen in the BUMP menu.

8. Use AIR to scroll to START and press and release POWER MODE to enter Measuring Mode.

Performing a Calibration (GAS CAL)

GAS CAL

AIR

SO2

0.00

AIR

ppm

• 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.

• To fully calibrate the sensor, you must do a fresh air adjustment (AIR CAL) and a span adjustment (A-CAL or E-CAL).

• The SC-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.

• E-CAL (appears if E-CAL User Mode item is set to something besides OFF): As soon as gas is applied and the reading reaches 10% of the auto calibration value, the instrument counts down from the number of seconds specified in the E-CAL User Mode item and automatically performs the adjustment.

Performing a Fresh Air Adjustment (AIR)

1. Find a fresh air environment, an environment of normal oxygen content (20.9%) that is free of toxic and combustible gases.

2. While in User Mode, press AIR to scroll to GAS CAL.

3. Press and release POWER MODE. The AIR item appears.

4. Press and release POWER MODE to enter the AIR menu.

5. To return to the AIR menu without performing a fresh air adjustment, press and release POWER MODE.

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6. To perform a fresh air adjustment, press and hold AIR until the screen prompts you to release

AIR

HOLD

AIR

RELEASE

it.

7. If the fresh air adjustment passes, the instrument returns to the AIR item in the GAS CAL menu.

8. If the fresh air adjustment fails, “FAIL AIR” displays. Press and release POWER MODE to acknowledge the failure. See page 72.

Performing a Span Adjustment in A-CAL

The A-CAL item only appears if E-CAL in User Mode is set to OFF (factory setting). If E-CAL is set to ON, see page 51 for calibration instructions.

Preparing for Span Adjustment

To adjust the span on the SC-04, you need:

• Calibration gas cylinder

Table 10: Calibration Concentration Limits

Channel

Ammonia 8 ppm 400 ppm

Chlorine 0.15 ppm 10.00 ppm

Hydrogen Cyanide 0.9 ppm 30.0 ppm

Nitrogen Dioxide 0.50 ppm 20.00 ppm

Phosphine 0.05 ppm 20.00 ppm

Sulfur Dioxide 0.50 ppm 100.00 ppm

• 0.25 LPM fixed flow regulator

• Non-absorbent tubing

• Calibration cup

1. Confirm that the SC-04’s calibration gas value matches the concentration listed on the calibration gas cylinder as described on page 55.

Min. Cal. Concentration

Max. Cal. Concentration

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2. Install the calibration cup onto the SC-04. Be sure the calibration cup is installed in the correct

POWER

MODE

AIR

Front ViewSide View

GAS CAL

A-CAL

SO2

5.00

A-CAL

ppm

direction and that it is pushed on all the way.

3. Use the tubing to connect the regulator to the inlet of the calibration cup (labeled “IN”).

Performing a Span Adjustment

1. While in User Mode, press AIR to scroll to GAS CAL.

2. Press and release POWER MODE. The AIR item appears.

3. Use AIR to scroll to the A-CAL item.

4. Press and release POWER MODE. The display shows the gas and its assigned calibration value (see page 55 if the calibration value does not match the calibration gas cylinder’s concentration).

5. For toxic gas cylinders, it is important to vent the regulator while installing it onto the cylinder. Venting the regulator during installation helps prevent air from getting into the cylinder and degrading the gas. Open the regulator by turning the knob counterclockwise and install it onto the cylinder.

6. Press and release POWER MODE.

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7. The gas reading flashes and the bottom of the screen alternates between “APPLY” and “A-

SO2

0.00

A-CAL

ppm

SO2

0.00

APPLY

ppm

CAL”.

NOTE: To back out of the gas application screen without performing the calibration,

press and release AIR and POWER MODE together.

8. Turn the regulator knob counterclockwise to open the regulator.

9. Allow the gas to flow for 1 minute for all gases except Cl2 and NH3. Allow Cl2 and NH3 gas to flow for 2 minutes.

10. Press and release POWER MODE.

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11. The table below describes the 2 calibration outcomes.

PASS

A-CAL

SO2

5.10

A-CAL

ppm

SO2

10.00

MAX .SPAN

ppm

SO2 FAIL

A-CAL

ppm

Calibration Passed Calibration Failed

1. The instrument indicates that the calibration passed.

2. The instrument shows the current gas reading.

3. If MAX.SPAN is set to ON (default is OFF, see page 100), the response reading’s maximum adjustment is displayed. A maximum span of 10.00 ppm indicates that the reading could have been adjusted up to 10.00 ppm. If the maximum span value is close to the calibration gas value, the sensor should be replaced soon.

1. The instrument indicates that the calibration failed.

2. Close the regulator.

3. Unscrew the regulator.

4. Remove the calibration cup.

5. Press and release POWER MODE to return to the A-CAL screen in the A-CAL menu.

6. See “Troubleshooting” on page 72.

The maximum adjustment is either twice the calibration value or full scale, whichever is lower.

4. Close the regulator.

5. The instrument continues to the START screen.

6. Remove the calibration cup.

7. Press and release POWER MODE to enter Measuring Mode.

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Performing a Span Adjustment in E-CAL

POWER

MODE

AIR

Front ViewSide View

The E-CAL item only appears if E-CAL in User Mode is set to ON (factory setting is OFF). If E-CAL is set to OFF, see page 47 for calibration instructions.

Preparing for Span Adjustment

To adjust the span on the SC-04, you need:

• Calibration gas cylinder

Table 11: Calibration Concentration Limits

Channel

Ammonia 8 ppm 400 ppm

Chlorine 0.15 ppm 10.00 ppm

Hydrogen Cyanide 0.9 ppm 30.0 ppm

Nitrogen Dioxide 0.50 ppm 20.00 ppm

Phosphine 0.05 ppm 20.00 ppm

Sulfur Dioxide 0.50 ppm 100.00 ppm

Min. Cal. Concentration

Max. Cal. Concentration

• 0.25 LPM fixed flow regulator

• Non-absorbent tubing

• Calibration cup

1. Confirm that the SC-04’s calibration gas value matches the concentration listed on the calibration gas cylinder as described on page 55.

2. Install the calibration cup onto the SC-04. Be sure the calibration cup is installed in the correct direction and that it is pushed on all the way.

3. Use the tubing to connect the regulator to the inlet of the calibration cup (labeled “IN”).

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Performing a Calibration

GAS CAL

E-CAL

SO2

5.00

E-CAL

ppm

SO2

0.00

GAS IN

ppm

1. While in User Mode, press AIR to scroll to GAS CAL.

2. Press and release POWER MODE. The AIR item appears.

3. Use AIR to scroll to the E-CAL item.

4. Press and release POWER MODE. The display shows the gas and its assigned calibration value (see page 55 if the calibration value does not match the calibration gas cylinder’s concentration).

5. Press and release POWER MODE.

6. The gas reading flashes and the bottom of the screen says “GAS IN”.

7. For toxic gas cylinders, it is important to vent the regulator while installing it onto the cylinder. Venting the regulator during installation helps prevent air from getting into the cylinder and degrading the gas. Open the regulator by turning the knob counterclockwise and install it onto the cylinder.

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8. Once the gas reading reaches 10% of the auto calibration value, the screen starts counting

SO2

0.50

CAL 60

ppm

SO2

0.50

APLY 60

ppm

down from the time specified in the E-CAL User Mode item. In the example below, E-CAL is set to 60 seconds.

NOTE: RKI Instruments recommends an E-CAL setting of 120 seconds for Cl2 and

NH3 and 60 seconds for all other gases.

To back out of the gas application screen without performing the calibration, press and release AIR and POWER MODE together.

If the reading never reaches 10% of the auto calibration value, press and release POWER MODE to fail the calibration.

9. At the end of the countdown, the instrument makes the span adjustment.

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10. The table below describes the 2 calibration outcomes.

PASS

E-CAL

SO2

5.10

E-CAL

ppm

SO2

10.00

MAX .SPAN

ppm

SO2 FAIL

E-CAL

ppm

Calibration Passed Calibration Failed

1. The instrument indicates that the calibration passed.

2. The instrument shows the current gas reading.

1. The instrument indicates that the calibration failed.

2. Close the regulator.

3. Unscrew the regulator.

4. Remove the calibration cup.

5. Press and release POWER MODE to return to the E-CAL screen in the E-CAL menu.

6. See “Troubleshooting” on page 72.

The maximum adjustment is either twice the calibration value or full scale, whichever is lower.

4. Close the regulator.

5. The instrument continues to the START screen.

6. Remove the calibration cup.

7. Press and release POWER MODE to enter Measuring Mode.

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Setting the Calibration Values in CAL--P

GAS CAL

A-CAL

SO2

5.00

A-CAL

ppm

CAL-P

SO2

CAL-P

ppm

SO2

5.00

CAL-P

ppm

1. While in User Mode, press AIR to scroll to GAS CAL.

2. Press and release POWER MODE. The AIR item appears.

3. Use AIR to scroll to the A-CAL item (E-CAL if E-CAL in User Mode is set to ON).

4. Press and release POWER MODE. The Auto Cal screen displays.

5. Use AIR to scroll to CAL--P.

6. Press and release POWER MODE. The gas name displays.

7. Press and release POWER MODE. The calibration value begins to flash.

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8. Use AIR to adjust the calibration gas value. The calibration gas value in the instrument must match the value listed on the calibration gas cylinder you are using. Limits on the calibration gas value are shown in the table below.

Table 12: Calibration Concentration Limits

Channel

Ammonia 8 ppm 400 ppm

Chlorine 0.15 ppm 10.00 ppm

Hydrogen Cyanide 0.9 ppm 30.0 ppm

Nitrogen Dioxide 0.50 ppm 20.00 ppm

Phosphine 0.05 ppm 20.00 ppm

Sulfur Dioxide 0.50 ppm 100.00 ppm

Min. Cal. Concentration

Max. Cal Concentration

9. Press and release POWER MODE to save the change. The calibration gas value stops flashing and the unit returns to the gas name screen.

10. Use AIR to scroll to ESCAPE.

11. Press and release POWER MODE to return to the CAL--P item in the A-CAL menu.

12. Press AIR to scroll to ESCAPE.

13. Press and release POWER MODE to return to the A-CAL item in the GAS CAL menu.

14. See “Exiting the GAS CAL Menu” on page 56 to return to User Mode.

Exiting the GAS CAL Menu

1. While in the GAS CAL menu, press AIR to scroll to ESCAPE.

2. Press and release POWER MODE to return to the GAS CAL item in User Mode.

3. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

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Setting Calibration Parameters (CAL SET)

CAL SET

CAL .RMDR

CAL .INT

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.

2. Press and release POWER MODE. The CAL.RMDR item appears.

CAL.RMDR

ON (factory setting): The SC-04 gives an indication at start up if it is due for calibration. The type of indication depends on the CAL.EXPD setting (see page 58).

OFF: The SC-04 does not give an indication at start up if it is due for calibration.

1. After entering the CAL SET menu, press AIR to scroll to CAL.RMDR.

2. Press and release POWER MODE. 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 CAL.RMDR item in the CAL SET menu.

5. See “Exiting the CAL SET Menu” on page 58 to return to User Mode.

CAL.INT

This setting defines the amount of time between calibrations and can be set in 1 day increments. The minimum setting is 1 day and the maximum setting is 1000 days. The factory setting is 90 days.

1. After entering the CAL SET menu, press AIR to scroll to CAL.INT.

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2. Press and release POWER MODE. The current setting flashes.

CAL .EXPD

3. Use AIR to display the desired setting.

4. Press and release POWER MODE to save the setting and return to the CAL.INT item in the CAL SET menu.

5. See “Exiting the CAL SET Menu” on page 58 to return to User Mode.

CAL.EXPD

This item defines what indication is given during start up when calibration is due and

CAL.RMDR is set to ON (factory setting).

CONFIRM (factory setting): The SC-04 gives an indication at start up if calibration is past due.

Press and release AIR to continue without calibrating or press and release POWER MODE to enter User Mode and perform a calibration.

CANT.USE

release POWER MODE to enter User Mode and perform a calibration. Pressing AIR has no effect. A successful calibration must be performed in order to use the instrument.

NONE

acknowledge the indication. If desired, press POWER MODE to enter User Mode and perform a calibration. The warm-up sequence continues on its own.

1. After entering the CAL SET menu, press AIR to scroll to CAL.EXPD.

2. Press and release POWER MODE. 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 CAL.EXPD item in the CAL SET menu.

5. See “Exiting the CAL SET Menu” on page 58 to return to User Mode.

: The SC-04 gives an indication at start up that calibration is past due. Press and

: The SC-04 gives an indication at startup that calibration is past due. It is not necessary to

Exiting the CAL SET Menu

1. While in the CAL SET menu, press AIR to scroll to ESCAPE.

2. Press and release POWER MODE to return to the CAL SET item in User Mode.

3. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

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Setting Bump Test Parameters (BUMP.SET)

BUMP .SET

SETTING

GAS .TIME

The BUMP.SET menu has 5 items: SETTING, BP.RMDR, BP.INT, BP.EXPD, and ESCAPE.

1. While in User Mode, press AIR to scroll to BUMP.SET.

2. Press and release POWER MODE. The SETTING item appears.

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.

2. Press and release POWER MODE. The GAS.TIME item appears.

GAS.TIME

The GAS.TIME is the amount of time that the instrument is exposed to gas during a bump test. The available choices are 30 seconds (factory setting), 45 seconds, 60 seconds, and 90 seconds.

1. After entering the SETTING menu, press AIR to scroll to GAS.TIME.

2. Press and release POWER MODE. 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 GAS TIME item in the SETTING menu.

5. See “Exiting the SETTING Menu” on page 61 to return to BUMP.SET menu.

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CHECK

CAL .TIME

CHECK is the bump test tolerance value and is represented as a percentage of the calibration gas concentration. It is the percentage that the bump test reading can differ from the auto calibration value and still be considered a passed bump test. If the bump test reading differs more, the bump test fails. The available values are 10%, 20%, 30%, 40%, and 50% (factory setting).

1. After entering the SETTING menu, press AIR to scroll to CHECK.

2. Press and release POWER MODE. 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 CHECK item in the SETTING menu.

5. See “Exiting the SETTING Menu” on page 61 to return to BUMP.SET menu.

CAL.TIME

The CAL.TIME is the total time the instrument is exposed to calibration gas if A-CAL is set to ON and a bump test fails. The bump test time is deducted from the calibration time. For example,

if the CAL.TIME is set to 90 seconds and the GAS.TIME is set to 30 seconds, if the bump test fails, the SC-04 is only exposed to gas for an additional 60 seconds. The available values are 90 seconds (factory setting), and 120 seconds.

1. After entering the SETTING menu, press AIR to scroll to CAL.TIME.

2. Press and release POWER MODE. 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 CAL.TIME item in the SETTING menu.

5. See “Exiting the SETTING Menu” on page 61 to return to BUMP.SET menu.

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A-CAL

BP .RMDR

ON (factory setting): If a bump test fails, the unit automatically begins a calibration.

OFF: If a bump test fails, the unit does not automatically begin a calibration.

1. After entering the SETTING menu, press AIR to scroll to A-CAL.

2. Press and release POWER MODE. 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 A-CAL item in the SETTING menu.

5. See “Exiting the SETTING Menu” on page 61 to return to BUMP.SET menu.

Exiting the SETTING Menu

1. While in the SETTING menu, press AIR to scroll to ESCAPE.

2. Press and release POWER MODE to return to the SETTING item in the BUMP.SET menu.

3. See “Exiting the BUMP.SET Menu” on page 63 to return to User Mode.

BP.RMDR

ON: The SC-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 page 62). If the instrument is not due for bump testing, a check mark appears in the lower left corner of the LCD.

OFF (factory setting): The SC-04 does not give an indication at start up if it is due for bump testing.

1. After entering the BUMP.SET menu, press AIR to scroll to BP.RMDR.

2. Press and release POWER MODE. 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 BP.RMDR item in the BUMP.SET menu.

5. See “Exiting the BUMP.SET Menu” on page 63 to return to User Mode.

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BP.INT

BP .INT

BP .EXPD

This setting defines the amount of time between bump tests and can be set in 1 day increments. The minimum setting is 0 days and the maximum setting is 30 days (factory setting).

1. After entering the BUMP.SET menu, press AIR to scroll to BP.INT.

2. Press and release POWER MODE. 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 BP.INT item in the BUMP.SET menu.

5. See “Exiting the BUMP.SET Menu” on page 63 to return to User Mode.

BP.EXPD

This item defines what indication is given during start up when a bump test is due and BP.RMDR is set to ON (factory setting is OFF).

CONFIRM (factory setting): The SC-04 gives an indication at start up if a bump test is past due. Press and release AIR to continue without bump testing or press and release POWER MODE to enter User Mode and perform a bump test.

CANT.USE: The SC-04 gives an indication at start up that a bump test is past due. Press and release POWER MODE to enter User Mode and perform a bump test. Pressing AIR has no effect. A successful bump test must be performed in order to use the instrument.

NONE: The SC-04 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. The warm-up sequence continues on its own.

1. After entering the BUMP.SET menu, press AIR to scroll to BP.EXPD.

2. Press and release POWER MODE. 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 BP.EXPD item in the BUMP.SET menu.

5. See “Exiting the BUMP.SET Menu” on page 63 to return to User Mode.

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Exiting the BUMP.SET Menu

ALARM-P

SO2

ALARM-P

ppm

AIR

SO2

ALARM-P

ppm

DEF .ALMP

ESCAPE

1. While in the BUMP.SET menu, press AIR to scroll to ESCAPE.

2. Press and release POWER MODE to return to the BUMP.SET item in User Mode.

3. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

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.

2. Press and release POWER MODE. The first screen displays.

Setting the Alarm Points

1. After entering the ALARM-P menu, press AIR to scroll to the gas name.

2. Press and release POWER MODE.

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3. The Warning setpoint flashes.

SO2

2.00

WARNING

ppm

SO2

5.00

ALARM

ppm

SO2

100.00

ALARM H

ppm

SO2

5.00

STEL

ppm

SO2

2.00

STEL

ppm

SO2

ALARM-P

ppm

For all settings:

1) AIR to adjust

2) POWER MODE to save and continue

DEF .ALMP

4. Use AIR to adjust the Warning setpoint. The alarm setpoint limitations are shown in the table below.

Channel Alarm Point Limitations

0.15 ppm WARNING ALARM ALARM H 20.00 ppm

HCN 0.9 ppm WARNING ALARM ALARM H 30.0 ppm

5. Press and release POWER MODE to save the setting.

6. Repeat Step 4 and Step 5 for the Alarm, Alarm H, STEL and TWA settings.

7. The instrument returns to the channel selection screen.

8. See “ESCAPE” on page 65 to return to User Mode.

8.0 ppm WARNING ALARM ALARM H 400.0 ppm

0.50 ppm WARNING ALARM ALARM H 20.00 ppm

0.05 ppm WARNING ALARM ALARM H 20.00 ppm

0.50 ppm WARNING ALARM ALARM H 100.00 ppm

Defaulting the Alarm Points

Defaulting the alarm points defaults them back to factory settings as outlined in Table 2 on page 8 or to the settings saved in the SAVE-AP item in Gas Select Mode if you performed a SAVE-AP operation.

1. After entering the ALARM-P menu, press AIR to scroll to DEF.ALMP.

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2. Press POWER MODE to enter the DEF.ALMP item.

LUNCH

3. Press POWER MODE to perform an alarm default. Press AIR to return to the DEF.ALMP item in the ALARM-P menu.

4. The instrument asks if you’re sure you want to default the alarm points.

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.

ESCAPE

1. While in the ALARM-P menu, press AIR to scroll to ESCAPE.

2. Press and release POWER MODE to return to the ALARM--P item in User Mode.

3. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

Updating the Lunch Break Setting (LUNCH)

OFF (factory setting): The SC-04 automatically starts new TWA and PEAK reading collection and resets the time in operation at startup.

ON: The Lunch Break Screen displays during startup. From this screen, you can choose to continue accumulating TWA and PEAK readings and the time in operation from the last time the SC-04 was used or start collecting new readings and reset the time in operation.

1. While in User Mode, press AIR to scroll to LUNCH.

2. Press and release POWER MODE. 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 LUNCH item in User Mode.

5. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

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Setting the Confirmation Beep and

BEEP

BEEP .SEL

Non-Compliance Indicator (BEEP)

The BEEP menu has 3 items: BEEP.SEL, BEEP.INT, and ESCAPE.

1. While in User Mode, press AIR to scroll to BEEP.

2. Press and release POWER MODE. The BEEP.SEL item appears.

BEEP.SEL

BEEP.SEL defines what kind of confirmation or non-compliance indication you want to occur in Measuring Mode. The available choices are:

OFF (factory setting): The SC-04 does not provide a confirmation alert or non-compliance indicator.

LED: The SC-04’s LED double flashes as often as defined by the BEEP.INT parameter to verify that the instrument is operating.

BUZZER: The SC-04’s buzzer double beeps as often as defined by the BEEP.INT parameter to verify that the instrument is operating.

LED+BUZ: The SC-04’s LED double flashes and the buzzer double beeps as often as defined by the BEEP.INT parameter to verify that the instrument is operating.

BMP/CAL CONFIRM (factory setting) or NONE, the SC-04’s LED double flashes as often as defined by

the BEEP.INT parameter to indicate a non-compliance. Once a bump test or calibration (depending on which is due) is done, the LED stop flashing.

1. While in the BEEP menu, press AIR to scroll to BEEP.SEL.

2. Press and release POWER MODE. The current setting flashes.

: If a bump test or a calibration is due and if BP.EXPD or CAL.EXPD is set to

3. Use AIR to display the desired setting.

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4. Press and release POWER MODE to save the setting and return to the BEEP.SEL item in the

BEEP .INT

BL TIME

BEEP menu.

5. See “ESCAPE” on page 67 to return to User Mode.

BEEP.INT

The BEEP.INT parameter defines how often the confirmation alert or non-compliance indicator selected in BEEP.SEL occurs. This setting only applies if the BEEP.SEL parameter is set to something other than OFF (factory setting). The available choices are 0.5 minutes and 1-99 minutes in 1 minute increments. The factory setting is 5 minutes.

1. While in the BEEP menu, press AIR to scroll to BEEP.INT.

2. Press and release POWER MODE. 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 BEEP.INT item in the BEEP menu.

5. See “ESCAPE” on page 67 to return to User Mode.

ESCAPE

1. While in the BEEP menu, press AIR to scroll to ESCAPE.

2. Press and release POWER MODE to return to the BEEP item in User Mode.

3. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

Updating the Backlight Time (BL TIME)

This setting defines how long the LCD backlight stays on when you press any button. The minimum setting is OFF; the maximum setting is 255 seconds. The factory setting is 30 seconds.

1. While in User Mode, press AIR to scroll to BL TIME.

2. Press and release POWER MODE. The current setting flashes.

3. Use AIR to display the desired setting.

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4. Press and release POWER MODE to save the setting and return to the BL TIME item in User

KEY .TONE

DISP .SET

Mode.

5. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

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

ON (factory setting): The instrument beeps when a button is pressed.

OFF: The instrument does not beep when a button is pressed.

1. While in User Mode, press AIR to scroll to KEY.TONE.

2. Press and release POWER MODE. 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 KEY.TONE item in User Mode.

5. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

Display Mode Items (DISP.SET)

OFF: USER ID, STN ID, and BUZZ.VOL screens do not appear in Display Mode.

ON (factory setting): BUZZ.VOL screen appears in Display Mode. USER ID and STN ID

screens appear in 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.

2. Press and release POWER MODE. 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 DISP.SET item in User Mode.

5. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

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Zero Suppression (ZERO.SUP)

E-CAL

This item only appears if ZSUP.DSP is set to ON in Maintenance Mode (factory setting is OFF).

The ZERO.SUP setting is not intended for field adjustment. The default setting is ON.

Zero

Sensor

Suppression Val ue

HCN 0.5 ppm

0.10 ppm

4 ppm

0.30 ppm

0.02 ppm

0.20 ppm

Zero Follower (ZERO.FLW)

This item only appears if ZFLW.DSP is set to ON in Maintenance Mode (factory setting is OFF).

The ZERO.FLW setting is not intended for field adjustment. The default setting is ON.

Turning Easy Calibration On/Off (E-CAL)

OFF (factory setting): Auto Calibration (A-CAL) item appears in GAS CAL menu instead of Easy Calibration (E-CAL).

XX seconds: Easy Calibration (E-CAL) item appears in GAS CAL menu instead of Auto Calibration (A-CAL). During a calibration, the instrument counts down from the number of seconds you select.

NOTE: RKI Instruments recommends an E-CAL setting of 120 seconds for Cl2 and NH3 and

60 seconds for all other gases.

1. While in User Mode, press AIR to scroll to E-CAL.

2. Press and release POWER MODE. The current setting flashes.

3. Use AIR to display the desired setting.

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4. Press and release POWER MODE to save the setting and return to the E-CAL item in User

DATE

2020

4.21

10:40

PASS- W

Mode.

5. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

Setting the Date/Time (DATE)

1. While in User Mode, place the cursor next to DATE.

2. Press and release POWER MODE. The date and time display with the year flashing.

3. Use AIR to display the desired year.

4. Press and release POWER MODE to save the setting. The month setting flashes.

5. Repeat Step 3 and Step 4 to enter the month, day, hours, and minutes settings. The date and time are saved and the instrument returns to the DATE item in User Mode.

6. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

Turning the Password On/Off (PASS-W)

ON: The SC-04 prompts you for a password when you enter User Mode. The factory-set password is 0405 but it can be changed.

OFF (factory setting): No password is required to enter User Mode.

1. While in User Mode, press AIR to scroll to PASS-W.

2. Press and release POWER MODE. The current setting flashes.

3. Use AIR to display the desired setting.

4. If you selected OFF, press and release POWER MODE to save the setting and return to the PASS- W item in User Mode.

If you selected ON, continue with Step 5.

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5. Press and release POWER MODE. The Set Password Screen appears. The current password

0000

PASS- W

ROM/SUM

6180 72F8

ROM/SUM

START

appears and the first digit flashes.

6. Use AIR to display a number from 0 to 9.

7. Press and release POWER MODE to enter the selection and advance to the next number. To go back a number, press and hold AIR and POWER MODE for a few seconds.

8. Repeat Step 6 and Step 7 to select the remaining numbers. When you press and release POWER MODE to enter the last number, the password is saved and the instrument returns to the PASS-W item in User Mode.

9. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

Viewing the ROM/SUM (ROM/SUM)

The ROM/SUM screen shows the instrument’s firmware version and firmware checksum.

1. While in User Mode, press AIR to scroll to ROM/SUM.

2. Press and release POWER MODE. The screen shows the ROM/SUM. The ROM is the top value and the SUM is the bottom value.

3. Press and release POWER MODE to return to the ROM/SUM item in User Mode.

4. See “Entering Measuring Mode (START)” on page 71 to enter Measuring Mode.

Entering Measuring Mode (START)

1. While in User Mode, press AIR to scroll to START.

2. Press and release POWER MODE. The instrument begins its warmup sequence.

SC-0 4 Operator’s Manual Chapter 5: User Mode and Calibration • 71

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Chapter 6: Maintenance

Overview

This chapter describes troubleshooting procedures for the SC-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. Replacing the sensor and other parts with original equipment does not affect the intrinsic safety of the instrument.

AVERTISSEMENT: RKI Instruments recommande que le service, l'étalonnage et la

réparation des détecteurs de gaz RKI soient effectués par du personnel dûment formé à ces travaux. Le remplacement du capteur et d'autres pièces par l'équipement d'origine n'affecte pas la sécurité intrinsèque de l'instrument.

Troubleshooting

The troubleshooting table describes error messages, symptoms, probable causes, and recommended action for problems you may encounter with the SC-04.

Symptoms Probable Causes Recommended Action

• The LCD is blank. • The unit got turned off.

• The batteries needs to be

• The battery cover may not be

Table 13: Troubleshooting the SC-04

1. To turn on the unit, press and briefly

replaced.

completely closed.

2. Replace the batteries.

3. Be sure the battery cover is

4. If the difficulties continue, contact

hold POWER MODE.

completely closed and that the screw is tight.

RKI Instruments, Inc. for further instruction.

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Table 13: Troubleshooting the SC-04

Symptoms Probable Causes Recommended Action

• The LCD shows an abnormally high reading but other gas detection instruments

• Sensor filter needs to be replaced.

• The SC-04 needs to be recalibrated.

do not.

• The sensor needs replacement.

• Calibration fails. • The calibration value does not match the cylinder gas concentration.

• The sample gas is not reaching the sensor because of a bad connection.

• The calibration cylinder is out of gas or is outdated.

• The sensor needs replacement.

1. Replace the sensor filter.

2. Recalibrate the unit.

3. If the difficulties continue, replace the sensor and calibrate.

4. Allow instruments with NH

sensors 2 hours of sensor warmup prior to operation if the sensor or batteries are newly installed or if the unit’s batteries have been completely discharged.

5. If the difficulties continue, contact RKI Instruments, Inc. for further instruction.

1. Make sure the SC-04 has been properly set up for calibration.

2. Check all calibration tubing for leaks or for any bad connections.

3. Verify that the calibration cylinder contains an adequate supply of fresh test sample.

4. If the fail condition continues, replace the sensor.

5. If the difficulties continue, contact RKI Instruments, Inc. for further instruction.

• Heart symbol at the top of the screen becomes steadily on or disappears.

• A microprocessor error has occurred.

• Contact RKI Instruments, Inc. for further instruction.

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Replacing the Batteries (Alkaline or Ni-MH)

Figure 7: Releasing the Alligator or Belt Clip

WARNING: To prevent ignition of a hazardous atmosphere, 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.

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

maintain the QPS classification of the SC-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.

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

NOTE: If old batteries are completely out of charge (the unit does not power on), instruments

with NH3 sensors require 2 hours for sensor warmup before turning the instrument on for normal operation.

Replace the batteries when the last bar in the battery icon is flashing.

1. Make sure the SC-04 is off.

2. Release the side of the alligator or belt clip that is opposite the hinge. You may need to o a screwdriver to pry it open.

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3. Rotate the captive battery cover screw counterclockwise.

Battery

Cover Screw

Figure 8: Unscrew Battery Cover Screw

Battery Cover

Figure 9: Battery Cover Removal

Figure 10: Installing New Batteries

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.

6. Install the new AAA batteries. Follow the diagram shown in the battery compartment.

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7. Reinstall the battery cover and tighten the battery cover screw.

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8. If the instrument has been without batteries for more than 5 minutes, the date and time are reset and need to be set again. When the new batteries are installed, the instrument automatically turns on and displays the Date/Time Screen. Set the date and time as described on page 70. Once the date and time are set, the instrument begins its warmup sequence. If you do not set the date and time within 30 seconds, the instrument automatically begins its warmup sequence.

Recharging the Batteries (Ni-MH Batteries Only)

Any battery charger capable of charging AAA Ni-MH batteries can be used to recharge the SC04’s Ni-MH batteries. RKI Instruments, Inc. recommends using one of the chargers specified on page 83.

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

an area known to be nonhazardous.

NOTE: If old batteries have been completely discharged (the unit does not power on),

instruments with NH3 sensors require 2 hours for sensor warmup before turning the instrument on for normal operation.

1. Remove the batteries from the SC-04 as described in Step 1 - Step 5 on page 74.

2. Install the Ni-MH batteries in the charger. See the battery charger’s manual for charging instructions.

3. Put the batteries back in the SC-04 and reinstall the battery cover.

Replacing the Sensor Filter

NO2 and SO2 Sensors’ Filter: The H2S filter disk is tan in color. The filter should be replaced every 6 months.

HCN Sensor Filter: The H2S filter disk is dark gray in color. The filter should be replaced every 6 months.

Sensor Filter: The humidity filter disk is white in color. The filter should be replaced every 6

months.

NH3 Sensor Filter: The humidity filter is white in color. The filter should be replaced every 6 months.

1. Verify that the SC-04 is off.

2. Remove the rubber boot, if installed.

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3. Use a small Phillips screwdriver to unscrew the 4 screws that attached the front case to the

Figure 11: Unscrewing Case Screws

Screw, 4x

Front Case

Rear Case

Figure 12: Case Separation

rear case.

4. Turn the instrument right side up. The screws are not captive and may fall out. Be sure not to lose them.

5. Remove the front case from the rear case.

6. Turn the front case upside down.

7. If the sensor stayed in the front case, remove the sensor.

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8. The sensor filter sits in the middle of a black gasket. Pry the sensor filter out of the gasket.

Figure 13: Sensor Filter Location

Hydrophobic Filter

Sensor Gasket

Sensor Filter

Front Case

FrontCase Inside ViewInstrument Side View

Rear Case

9. Install a new sensor filter. If the gasket got removed, install it with the flat side facing the white hydrophobic filter.

10. If necessary, put the sensor in the socket on the rear case. The colored side faces away from the rear case and the slots in the sensor line up with tabs in the socket.

CAUTION: Forcing a sensor into a socket without lining the sensor slots up with the

socket tabs may damage the sensor or socket.

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.

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Replacing the Hydrophobic Filter

Figure 14: Unscrewing Case Screws

Screw, 4x

Front Case

Rear Case

Figure 15: Case Separation

1. Verify that the SC-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.

4. Turn the instrument right side up. The screws are not captive and may fall out. Be sure not to lose them.

5. Remove the front case from the rear case.

6. Turn the front case upside down.

7. If the sensor stayed in the front case, remove the sensor.

8. Carefully remove the sensor gasket and the sensor filter that sits in the middle of the sensor gasket.

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9. Remove the white hydrophobic filter.

Figure 16: Hydrophobic Filter Location

Hydrophobic Filter

Sensor Gasket

Sensor Filter

Front Case

FrontCase Inside ViewInstrument Side View

Rear Case

10. Install a new hydrophobic filter.

11. Reinstall the sensor gasket with the flat side facing the white hydrophobic filter.

12. If the sensor filter came loose, reinstall it in the middle of the sensor gasket.

13. If necessary, put the sensor in the socket on the rear case. The colored side faces away from the rear case and the slots in the sensor line up with tabs in the socket.

CAUTION: Forcing a sensor into a socket without lining the sensor slots up with the

socket tabs may damage the sensor or socket.

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.

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Replacing the Sensor

Figure 17: Unscrewing Case

Screw, 4x

Front Case

Rear Case

Figure 18: Case Separation

1. Verify that the SC-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.

4. Turn the instrument right side up. The screws are not captive and may fall out. Be sure not to lose them.

5. Remove the front case from the rear case.

6. Turn the front case upside down.

7. Remove the old sensor. It will either be in its rear case socket or it will be stuck to the sensor gasket in the front case.

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8. Install the new sensor in the socket on the rear case. The colored side faces away from the rear

Figure 19: Sensor Location

Tabs

Align Sensor Slots with Tabs in Case

Rear

Case

case and the slots in the sensor line up with tabs in the socket.

CAUTION: Forcing a sensor into a socket without lining the sensor slots up with the

socket tabs may damage the sensor or socket.

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.

NOTE: Instruments with newly installed NH3 sensors require 2 hours for sensor

warmup before initial calibration.

12. Calibrate the sensor as described on page 46.

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Chapter 7: General Parts List

Table 14 lists part numbers for the SC-04’s replacement parts and accessories.

Table 14: 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

13-0112RK Wrist strap

13-0122 Belt clip

13-0128 Alligator clip

13-0204RK Pins for connecting alligator clip/belt clip

20-0325 Rubber boot

33-0175 Hydrophobic filter

33-7136 Humidity filter disk (white), for PH

33-7136-01 Humidity filter disk (white), for PH

33-7138 H

33-7138-01 H

33-7139 H

33-7139-01 H

S scrubber disk (dark gray), for HCN sensor, 5 pack

S scrubber disk (dark gray), for HCN sensor

S scrubber disk (tan), for NO2 and SO2 sensors, 5 pack

S scrubber disk (tan), for NO2 and SO2 sensors

33-7141 Humidity filter disk (white), for NH

33-7141-01 Humidity filter disk (white), for NH

sensor, 5 pack

sensor

sensor, 5 pack

sensor

47-5084RK USB/IrDA adapter module, Legasic, for use with all premier portables (without

USB cable)

47-5084RK-01 USB/IrDA adapter assembly, Legasic, for use with all premier portables (with mod-

ule and USB cable)

47-5085RK Cable, USB A to USB mini, 6 feet, for 47-5084RK USB/IrDA adapter module

49-1110RK AAA size alkaline battery

49-1312 AAA size Ni-MH battery

49-3105RK 4-battery AA/AAA charger with AC adapter and DC vehicle adapter

49-3106RK 12-battery AA/AAA charger with AC adapter

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Table 14: General Parts List (Continued)

Part Number Description

71-0548 Operator’s Manual, SC-04 (this document)

71-0525 Operator’s Manual, 04 Series Datalogging Program

71-0526 Operator’s Manual, 04 Series Setup Program

81-0076RK-01 Calibration cylinder, zero air, 34 liter steel

81-0076RK-03 Calibration cylinder, zero air, 103 liter

81-0170RK-02 Calibration cylinder, 5 ppm SO

81-0170RK-04 Calibration cylinder, 5 ppm SO

81-0176RK-02 Calibration cylinder, 25 ppm NH

81-0176RK-04 Calibration cylinder, 25 ppm NH

81-0180RK-02 Calibration cylinder, 10 ppm NO

81-0180RK-04 Calibration cylinder, 10 ppm NO

81-0186RK-02 Calibration cylinder, 5 ppm PH

81-0190RK-02 Calibration cylinder, 5 ppm Cl

81-0190RK-04 Calibration cylinder, 5 ppm Cl

in nitrogen, 58 liter

in nitrogen, 34 liter aluminum

in nitrogen, 58 liter

in nitrogen, 34 liter aluminum

in nitrogen, 58 liter

in nitrogen, 34 liter aluminum

in nitrogen, 58 liter

in nitrogen, 34 liter aluminum

81-0196RK-02 Calibration cylinder, 10 ppm HCN in nitrogen, 58 liter

81-0196RK-04 Calibration cylinder, 10 ppm HCN in nitrogen, 34 liter aluminum

81-1050RK-25 Regulator, fixed flow, 0.25 LPM, with gauge and knob, for 17 liter and 34 liter steel

cylinders (cylinders with external threads)

81-1051RK-25 Regulator, fixed flow, 0.25 LPM, with gauge and knob, for 34 liter aluminum, 58

liter, and 103 liter cylinders (cylinders with internal threads)

81-1146 Calibration cup

81-SC04CL2-LV Calibration kit for Cl

SC-04: 34 liter aluminum cylinder of 5 ppm Cl2 in N2,

regulator, tubing, calibration cup, case

81-SC04HCN-LV Calibration kit for HCN SC-04: 34 liter aluminum cylinder of 10 ppm HCN in N

regulator, tubing, calibration cup, case

81-SC04NO2-LV Calibration kit for NO

SC-04: 34 liter aluminum cylinder of 10 ppm NO2 in N2,

regulator, tubing, calibration cup, case

81-SC04PH3-LV Calibration kit for PH

SC-04: 34 liter aluminum cylinder of 0.5 ppm PH3 in N2,

regulator, tubing, calibration cup, case

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Table 14: General Parts List (Continued)

Part Number Description

81-SC04SO2-LV Calibration kit for SO2 SC-04: 34 liter aluminum cylinder of 5 ppm SO2 in N

ulator, tubing, calibration cup, case

ESR-A13D-HCN Hydrogen cyanide (HCN) sensor

ESR-A13D-NO2 Nitrogen dioxide (NO

ESR-A13D-PH3 Phosphine (PH

) sensor

ESR-A13D-SO2 Sulfur dioxide (SO

ESR-B134-NH3 Ammonia (NH

ESR-B136-CL2 Chlorine (Cl

) sensor

, reg-

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Appendix A: Maintenance Mode

Overview

This appendix describes the SC-04 in Maintenance Mode. The SC-04 is factory-set to suit most applications. Update settings in Maintenance Mode only if required for your specific application. Maintenance Mode items and their factory settings are listed in Table 15 below.

Table 15: Maintenance Mode Menu Items

Maintenance Mode Menu Item

Description

GAS CAL (page

89)

GAS.TEST (page 89)

SEN.DATE (page 91)

Perform an air adjust, perform a span adjustment, change the calibration values.

AIR Perform a fresh air adjustment.

A-CAL or E-CAL depending on E-CAL User Mode setting

ESCAPE Return to the GAS CAL item in Maintenance Mode.

Apply gas to test sensor response and observe alarm indications without an alarm event being recorded.

View and/or set the replacement date for the sensor and the batteries.

Perform a span adjustment and set the calibration gas concentra-

tion.

A-CAL (or E-CAL)

START Begin the warmup sequence and enter Measuring

CAL-P Set the calibration gas concentration.

ESCAPE Return to the A-CAL item in the GAS CAL menu.

Perform an automatic span adjustment.

Mode.

BUMP (page

91)

LATCH (page

92)

D.ZERO (page

92)

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Perform a bump test.

ON (factory setting) and POWER MODE is pressed.

OFF

: The SC-04 automatically resets an alarm when the alarm condition passes.

ON (factory setting) Mode by pressing AIR.

OFF

: You cannot manually perform a fresh air adjust in Measuring Mode by

pressing AIR.

: The SC-04 remains in alarm until the alarm condition passes

: You can manually perform a fresh air adjust in Measuring

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Maintenance Mode Menu Item

Table 15: Maintenance Mode Menu Items

Description

A.ZERO (page

93)

ID DISP (page

93)

ZERO.SUP (page 94)

ZERO.FLW (page 94)

ON: The SC-04 asks if you want to perform a fresh air adjustment at the end of the startup sequence.

OFF (factory setting)

: The SC-04 does not ask if you want to perform a fresh air

adjustment at the end of the startup sequence.

: User ID and Station ID screens appear in startup sequence. IDs can be

changed in Display Mode if DISP.SET in User Mode is also set to ON. OFF (factory setting)

: User ID and Station ID screens do not appear in startup

sequence. IDs cannot be changed in Display Mode.

ON (factory setting)

: Not intended for field adjustment. The suppression values

are: Cl

: 0.10 ppm

HCN: 0.5 ppm NH

: 4 ppm

: 0.30 ppm

: 0.02 ppm

: 0.20 ppm

ON (factory setting)

: Not intended for field adjustment.

ZSUP.DSP (page 94)

: Zero suppression item appears in User Mode.

OFF (factory setting)

: Zero suppression item does not appear in User Mode.

(Zero suppression item is always available in Maintenance Mode)

ZFLW.DSP (page 94)

: Zero follower item appears in User Mode.

OFF (factory setting)

: Zero follower item does not appear in User Mode.

(Zero follower item is always available in Maintenance Mode)

CYL.DISP (page 95)

: CYL SEL item appears in GAS CAL.

OFF (factory setting)

: CYL SEL item does not appear in GAS CAL.

(RKI Instruments, Inc. does not recommend adjusting this setting.)

DATE (page 95) Set the current date and time.

PASS-W (page

95)

ROM/SUM

ON (factory setting)

: Maintenance Mode is password-protected. Factory-set pass-

word is 0400. OFF

: Maintenance Mode is not password-protected.

View the firmware information for the SC-04’s sensor board and main board.

(page 96)

M.DEF (page

Set all parameters back to their RKI factory settings.

97)

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Maintenance

PASS-W set to OFF PASS-W set to ON

0000

PASS- W

BUMP

GAS CAL

Mode Menu Item

Table 15: Maintenance Mode Menu Items

Description

START (page

97)

Press and release POWER MODE to begin the warmup sequence and enter Mea-

suring Mode.

Entering Maintenance Mode

WARNING: The SC-04 is not in operation as a gas detector while in Maintenance Mode.

1. Take the SC-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. Continue to hold the buttons down.

3. When you hear a second beep, release the buttons.

4. The screen that appears depends on the setting of Maintenance Mode’s PA SS -W item.

If PASS-W is set to OFF, continue with Step 8.

If PASS-W is set to ON (factory setting), continue with Step 5.

5. If PAS S- W is set to ON in Maintenance Mode, a password screen appears and the first digit is flashing. The factory-set password is 0400 but it can be changed.

6. Use AIR to select each password number then press POWER MODE to save it and move on to the next number. To go back a number, press and hold AIR and POWER MODE for a few seconds. To reverse the direction of change (ie. from increasing to decreasing or vice versa):

a. Press and hold AIR.

b. Immediately press POWER MODE and then release both buttons.

7. Continue to Step 6.

8. The GAS CAL item displays.

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9. Use AIR to move through the Maintenance Mode items.

Tips for Using Maintenance Mode

• To scroll from one item to the next, press and release AIR. To reverse the scrolling direction:

a. Press and hold AIR.

b. Immediately press POWER MODE and then release both buttons.

c. The scrolling direction returns to the original direction when you exit and reenter a menu.

• 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.

• To change a flashing parameter, press and release AIR. To reverse the direction of change (ie.

from increasing to decreasing or vice versa):

a. 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.

Performing a Calibration (GAS CAL)

See page 46 for a description of the GAS CAL item.

Performing a Gas Test (GAS.TEST)

The GAS.TEST item allows you to apply gas to the instrument and see all alarm indications except though the buzzer sounds in the event of a real gas alarm condition while in Measuring Mode.

A gas test is not saved in logged data.

Preparing for a Gas Test

To perform a gas test on the SC-04, you need:

for the buzzer indication. There is no buzzer indication in the GAS.TEST menu even

• A calibration gas cylinder. The concentrations should be above the alarm condition you want to check. Standard alarm points are listed on page 8.

• A 0.25 LPM fixed flow regulator

• Non-absorbent tubing

• Calibration cup

SC-0 4 Operator’s Manual Appendix A: Maintenance Mode • 89

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1. Install the calibration cup onto the SC-04. Be sure the calibration cup is installed in the correct

POWER

MODE

AIR

Front ViewSide View

GAS .TEST

SO2

0.00

GAS .TEST

ppm

SO2

0.00

BUZZ .OFF

ppm

direction and that it is pushed on all the way.

2. Use the tubing to connect the regulator to the inlet of the calibration cup (labeled “IN”).

Performing a Gas Test

1. While in Maintenance Mode, press AIR to scroll to GAS.TEST.

2. Press and release POWER MODE. The current gas reading displays. The bottom of the LCD alternates between “GAS.TEST” and “BUZZ.OFF”.

3. For toxic gas cylinders, it is important to vent the regulator while installing it onto the cylinder. Venting the regulator during installation helps prevent air from getting into the cylinder and degrading the gas. Open the regulator by turning the knob counterclockwise and install it onto the cylinder.

4. The instrument initiates alarm indications except in the GAS.TEST menu even though the buzzer sounds in the event of a real gas alarm condition.

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 SC-04.

for the buzzer. There is no buzzer indication

90 • Appendix A: Maintenance Mode SC- 04 Operator’s Manual

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8. Store the calibration kit in a safe and convenient place.

SEN .DATE

2019 11 .2

SO2

2019

1. 1

BATTERY

ESCAPE

AIR AIR

AIR

9. Press and release POWER MODE to return to the GAS.TEST item in Maintenance Mode.

10. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode.

Sensor/Battery Replacement Date (SEN.DATE)

The SEN.DATE item allows you to keep track of when the sensor and the batteries were replaced.

1. While in Maintenance Mode, press AIR to scroll to SEN.DATE.

2. Press and release POWER MODE. The sensor replacement date displays.

3. Use AIR to scroll to the item whose replacement date you want to view or change.

4. To change the replacement date:

a. With the desired item displayed, press and release POWER MODE.

b. Press and release POWER MODE again to set the replacement date to the current date.

5. Use the AIR button to scroll to ESCAPE.

6. Press and release POWER MODE to return to the SEN.DATE item in Maintenance Mode.

7. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode.

Performing a Bump Test (BUMP)

See “Performing a Bump Test (BUMP)” on page 42 for a description of the BUMP item.

SC-0 4 Operator’s Manual Appendix A: Maintenance Mode • 91

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Setting Alarms to Latching or Self-Resetting (LATCH)

LATCH

D .ZERO

ON (factory setting): The SC-04 remains in alarm until the alarm condition passes and POWER MODE is pressed.

OFF: The SC-04 automatically resets an alarm when the alarm condition passes.

1. While in Maintenance Mode, press AIR to scroll to LATCH.

2. Press and release POWER MODE. 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 LATCH item in Maintenance Mode.

5. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode.

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

ON (factory setting): You can manually perform a fresh air adjust in Measuring Mode by pressing AIR.

OFF: You cannot manually perform a fresh air adjust in Measuring Mode.

1. While in Maintenance Mode, press AIR to scroll to D.ZERO.

2. Press and release POWER MODE. 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 D.ZERO item in Maintenance Mode.

5. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode.

92 • Appendix A: Maintenance Mode SC- 04 Operator’s Manual

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

A .ZERO

ID DISP

ON: The SC-04 asks if you want to perform a fresh air adjustment at the end of the startup sequence.

OFF (factory setting): The SC-04 does not ask if you want to perform a fresh air adjustment at the end of the startup sequence.

1. While in Maintenance Mode, press AIR to scroll to A.ZERO.

2. Press and release POWER MODE. 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 A.ZERO item in Maintenance Mode.

5. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode.

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

ON: The User ID and Station ID screens appear in the startup sequence. If DISP.SET in User Mode is also set to ON, then the IDs can be changed in Display Mode.

OFF (factory setting): The User ID and Station ID screens do not appear in the startup sequence and the IDs cannot be changed in Display Mode.

1. While in Maintenance Mode, press AIR to scroll to ID DISP.

2. Press and release POWER MODE. 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 ID DISP item in Maintenance Mode.

5. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode.

SC-0 4 Operator’s Manual Appendix A: Maintenance Mode • 93

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

The ZERO.SUP setting is not intended for field adjustment. The default setting is ON.

Sensor

HCN 0.5 ppm

Zero Suppression Val ue

0.10 ppm

4 ppm

0.30 ppm

0.02 ppm

0.20 ppm

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

The ZERO.FLW setting is not intended for field adjustment. The default setting is ON.

User Mode Zero Suppression (ZSUP.DSP)

ON: Zero suppression item appears in User Mode.

OFF (factory setting): Zero suppression item does not appear in User Mode. The zero suppression

item is always available in 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.

OFF (factory setting): Zero follower item does not appear in User Mode. The zero follower item

is always available in Maintenance Mode.

It is not normally necessary to have the zero follower item appear in User Mode. Contact RKI Instruments before turning this setting on.

94 • Appendix A: Maintenance Mode SC- 04 Operator’s Manual

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Cylinder Setting (CYL.DISP)

DATE

2020

4.21

10:40

PASS-W

ON: CYL SEL item appears in User and Maintenance Modes’ GAS CAL item.

OFF (factory setting): CYL SEL item does not appear in User and Maintenance Modes’ GAS CAL item.

Setting the Date/Time (DATE)

1. From the main menu, place the cursor next to DATE.

2. Press and release POWER MODE. The date and time display with the year flashing.

3. Use AIR to display the desired year.

4. Press and release POWER MODE to save the setting. The month setting flashes.

5. Repeat Step 3 and Step 4 to enter the month, day, hours, and minutes settings. The date and time are saved and the instrument returns to the DATE item in Maintenance Mode.

6. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode.

Turning the Password On/Off (PASS-W)

ON (factory setting): The SC-04 prompts you for a password when you enter Maintenance Mode. The factory-set password is 0400 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.

2. Press and release POWER MODE. The current setting flashes.

3. Use AIR to display the desired setting.

SC-0 4 Operator’s Manual Appendix A: Maintenance Mode • 95

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4. If you selected OFF, press and release POWER MODE to save the setting and return to the

0400

PASS- W

ROM/SUM

6180 72F8

ROM/SUM

PASS- W item in User Mode.

If you selected ON, continue with Step 5.

5. Press and release POWER MODE. The Set Password Screen appears. The current password displays and the first digit flashes.

6. Use AIR to display a number from 0 to 9.

7. Press and release POWER MODE to enter the selection and advance to the next number. To go back a number, press and hold AIR and POWER MODE for a few seconds.

9. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode.

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.

2. Press and release POWER MODE. The screen shows the ROM/SUM. The ROM is the top value and the SUM is the bottom value.

3. Press and release POWER MODE to return to the ROM/SUM item in Maintenance Mode.

4. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode.

96 • Appendix A: Maintenance Mode SC- 04 Operator’s Manual

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Performing a Default (M.DEF)

M .DEF

M .DEF YES .MODE

NO .AIR

SURE ? YES .MODE

NO .AIR

START

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.

2. Press and release POWER MODE.

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.

4. Press and release POWER MODE to perform a default operation. The instrument beeps twice and returns to the M.DEF item in Maintenance Mode.

5. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode.

Entering Measuring Mode (START)

1. While in Maintenance Mode, press AIR to scroll to START.

2. Press and release POWER MODE. The instrument begins its warmup sequence.

SC-0 4 Operator’s Manual Appendix A: Maintenance Mode • 97

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Appendix B: Gas Select Mode

0000

PASS- W

Overview

This appendix describes the SC-04 in Gas Select Mode. The SC-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 16 below.

Table 16: Gas Select Mode Menu Items

Menu Item (Page # of Description)

SAVE-AP (page 99) Set the current alarm points as the default alarm points.

MAX.SPAN (page 100) ON: Maximum span screen appears after a successful calibration.

STEALTH (page 101) STEALTH ON

START (page 101) Enter Measuring Mode

Description

OFF (factory setting)

STEALTH OFF normally.

This setting has no effect unless STEALTH is set to ON. VIB ON VIB OFF

: Vibrator activates for alarm conditions.

(factory setting): Vibrator does not activate in any situation.

: No maximum span screen appears.

: No backlight, LED, or buzzer operation.

(factory setting): Backlight, LED, and buzzer operate

Entering Gas Select Mode

WARNING: The SC-04 is not in operation as a gas detector while in Gas Select Mode.

1. Take the SC-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. Continue to hold the buttons down.

3. You will hear a second beep. Continue to hold the buttons down.

4. When you hear a third beep, release the buttons.

5. A password screen appears and the first digit flashes. The password is 2014.

98 • Appendix B: Gas Select Mode S C- 04 Operator’s Manual

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6. Use AIR to select each password number then press POWER MODE to save it and move on

SAVE - AP

to the next number. To go back a number, press and hold AIR and POWER MODE for a few seconds.

7. The SAVE-AP item displays.

8. Use AIR to move through the Gas Select Mode items.

Tips for Using Gas Select Mode

• To scroll from one item to the next, press and release AIR. To reverse the scrolling direction:

a. Press and hold AIR.

b. Immediately press POWER MODE and then release both buttons.

c. The scrolling direction returns to the original direction when you exit and reenter a menu.

• 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.

• To change a flashing parameter, press and release AIR. To reverse the direction of change (ie.

from increasing to decreasing or vice versa):

a. 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.

Saving the Alarm Points (SAVE-AP)

Performing a SAVE-AP operation saves the current alarm setpoints.

Performing a DEF.ALMP operation in the ALARM-P User Mode menu sets the instrument’s alarm points to those saved during the SAVE-AP operation (if performed).

Performing a SAVE-AP has no effect on an M.DEF in Maintenance Mode. An M.DEF operation returns all instrument settings to the RKI default regardless of if a SAVE-AP operation was performed.

1. While in Gas Select Mode, press AIR to scroll to SAVE-AP.

SC-0 4 Operator’s Manual Appendix B: Gas Select Mode • 99

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2. Press and release POWER MODE. The display cycles through the following screens.

SEL

SAVE - AP

SEL

YES .MODE

SEL

NO .AIR

MAX .SPAN

3. Press and release POWER MODE to save the current alarm point settings as the default.

4. The instrument returns to the SAVE-AP item in Gas Select Mode.

5. See “Exiting Gas Select Mode (START)” on page 101 to enter Measuring Mode.

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

ON: After a passed calibration, the SC-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. If the maximum span value is close to the calibration value, the sensor should be replaced soon. The upper limit on the maximum adjustment indicated is either twice the calibration value or full scale, whichever is lower.

OFF (factory setting): There is no maximum span indication at the end of a calibration.

1. While in Gas Select Mode, press AIR to scroll to MAX.SPAN.

2. Press and release POWER MODE. 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 MAX.SPAN item in Gas Select Mode.

5. See “Exiting Gas Select Mode (START)” on page 101 to enter Measuring Mode.

100 • Appendix B: Gas Select Mode SC- 04 Operator’s Manual

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RKI Instruments 73-0079 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SC-04

Table of Contents

Chapter 1: Introduction

Overview

About the SC-04

Specifications

About this Manual

Chapter 2: Description

Overview

Instrument Description

Case

Control Buttons

Alarm LED

Buzzer

Vibrator

Sensor

Filters

Infrared Communications Port

Batteries

Alligator Clip

Standard Accessories

Protective Rubber Boot

Belt Clip

Optional Accessories

Wrist Strap

Calibration Cup

IrDA/USB Cable

Chapter 3: Measuring Mode

Overview

Start Up

Turning On the SC-04

Performing a Demand Zero

Turning Off the SC-04

Measuring Mode Operation

Monitoring an Area

Interference Information

Alarms

Alarm Indications

Responding to Alarms

Data Logging

Chapter 4: Display Mode

Tips for Using Display Mode

Peak Screen (PEAK)

STEL Screen (STEL)

TWA Screen (TWA)

Changing the User ID (USER ID)

Changing the Station ID (STN ID)

Last Successful Calibration Date (CAL.DATA)

Last Successful Bump Test Date (BP.DATA)

Date/Time Screen (DATE)

Temperature Screen (TEMP)

Alarm Points Screen (ALARM--P)

Adjusting the Buzzer Volume (BUZZ.VOL)

Chapter 5: User Mode and Calibration

Overview

Entering User Mode

Tips for Using User Mode

Performing a Bump Test (BUMP)

Performing a Calibration (GAS CAL)

Performing a Fresh Air Adjustment (AIR)

Performing a Span Adjustment in A-CAL

Performing a Span Adjustment in E-CAL

Setting the Calibration Values in CAL--P

Exiting the GAS CAL Menu

Setting Calibration Parameters (CAL SET)

CAL .RMDR

CAL .INT

CAL .EXPD

Exiting the CAL SET Menu

Setting Bump Test Parameters (BUMP.SET)

SETTING

BP .RMDR

BP.INT

BP .EXPD

Exiting the BUMP.SET Menu

Alarm Settings (ALARM--P)