III
Contents Page
5.2 Adjustment ..............................................................................62
5.2.1 Scope ...................................................................................62
5.2.2 Test gases for the adjustment ..............................................63
5.2.3 Special features of adjustment with gas mixture..................64
5.2.4 Preparation...........................................................................65
5.2.5 Performing the adjustment ...................................................65
5.2.5.1 Adjusting the zero point.....................................................66
5.2.5.2 Adjusting the sensitivity.....................................................66
5.2.6 Carrying out an oxygen adjustment .....................................68
5.2.6.1 Adjusting the zero point for oxygen...................................68
5.2.6.2 Adjusting the sensitivity for oxygen...................................69
5.3 Servicing .................................................................................69
6 Faults......................................................................................70
7 Appendix................................................................................71
7.1 Specications and permitted operating conditions..................71
7.2 Alarms .....................................................................................72
7.2.1 Features ...............................................................................72
7.2.2 Occupational exposure limits (OEL) and excess factors
(STEL and LTEL)..................................................................75
7.2.3 Alarm thresholds (factory settings).......................................75
7.2.4 Setting ranges for gas types ................................................76
7.3 Limit values for the device inspection .....................................77
7.4 Memory capacity .....................................................................78
7.5 Sensors ...................................................................................79
7.5.1 Infrared sensors (IR) ............................................................79
7.5.1.1 Methane CH4, propane C3H8, butane C4H10 for
Warning %LEL and Warning ExTox ..................................79
7.5.1.2 Methane CH4, propane C3H8for gas measuring ...............80
7.5.1.3 Carbon dioxide CO2for warning ExTox.............................80
7.5.1.4 Carbon dioxide CO2for measuring in bar holes................81
7.5.2 Electrochemical sensors (EC)..............................................81
7.5.2.1 Oxygen O2........................................................................81
7.5.2.2 Carbon monoxide CO .......................................................82
7.5.2.3 Hydrogen sulphide H2S.....................................................83
7.5.3 Gas-sensitive semiconductor ...............................................83
7.6 Technical information ..............................................................84
7.6.1 Identication sticker (back of device) ...................................84
7.6.2 Cleaning ...............................................................................84
