sewerin VARIOTEC 480 EX - Page 7

III
Contents Page
5.2 Adjustment ..............................................................................65
5.2.1 Scope ...................................................................................65
5.2.2 Test gases for the adjustment ..............................................66
5.2.3 Special features of adjustment with gas mixture ..................67
5.2.4 Preparation ...........................................................................68
5.2.5 Performing the adjustment ...................................................68
5.2.5.1 Adjusting the zero point.....................................................68
5.2.5.2 Adjusting the sensitivity ..................................................... 69
5.2.6 Carrying out an oxygen adjustment .....................................70
5.2.6.1 Adjusting the zero point for oxygen ...................................70
5.2.6.2 Adjusting the sensitivity for oxygen ...................................72
5.3 Servicing .................................................................................72
6 Faults ......................................................................................73
7 Appendix ................................................................................ 74
7.1 Specications and permitted operating conditions .................. 74
7.2 Alarms .....................................................................................75
7.2.1 Features ...............................................................................75
7.2.2 Occupational exposure limits (OELs) and excess factors
(STEL and LTEL) ..................................................................78
7.2.3 Alarm thresholds (factory settings) .......................................78
7.2.4 Setting ranges for gas types ................................................79
7.3 Limit values for the device inspection .....................................79
7.4 Memory capacity .....................................................................80
7.5 Sensors ...................................................................................81
7.5.1 Gas-sensitive semiconductor (SC) .......................................81
7.5.2 Catalytic combustion sensor (CC) ........................................82
7.5.3 Thermal conductivity sensor (TC) ........................................82
7.5.4 Electrochemical sensors (EC) .............................................. 83
7.5.4.1 Oxygen O
2
........................................................................ 83
7.5.4.2 Carbon monoxide CO .......................................................83
7.6 Technical information ..............................................................84
7.6.1 Sensitivity of the catalytic combustion sensor ......................84
7.6.2 Identication sticker (back of device) ...................................84
7.6.3 Cleaning ...............................................................................84
7.6.4 Electrostatic charge ..............................................................85
7.7 Accessories and consumables ................................................86
7.8 EU declaration of conformity ...................................................87