16
3 Measuring operation
3.5
Alarms
The „Technical Rules for Hazardous Substances (TRGS 402 and
900)“ require certain limit values to be monitored and adhered to
in the air in the workplace.
In
WARNING mode
only the
EX-TEC Combi
thus has three
different types of alarm: one optical (item 1), one acoustic (item
7) and one that takes the form of the LCD illumination (item 2)
switching on:
AL1, AL2, AL3
The instantaneous value alarm appears with
all gases:
CH
4
- CO
2
- O
2
- H
2
S - CO
when the
measured
gas concentration
exceeds or falls below a fixed
threshold
value
.
KZW
The short-term value alarm appears with toxic
gases:
CO
2
- H
2
S - CO
when the gas concentration
averaged
over an
adjustable time period (e.g. 15 minutes) has
exceeded an assessed
limit value
.
LZW
The
long-term value alarm
appears with
toxic gases:
CO
2
- H
2
S - CO
when the gas concentration
averaged
over
an 8-hour working shift has exceeded a fixed
limit value
.
Summary of Contents for EX-TEC Combi
Page 1: ...Operating Instructions ...
Page 3: ...Illustration EX TEC Combi EX TEC Combi Device variation 1 Device variation 2 EX TEC Combi 100 ...
Page 5: ...Operating Instructions 15 06 2005 V2 X 103401 en EX TEC Combi ...
Page 117: ...108 Appendix ...
Page 118: ...109 Appendix ...
Page 119: ...110 Appendix ...
Page 120: ...111 Appendix ...
Page 121: ...112 Appendix ...
Page 122: ...113 Appendix ...
Page 123: ...114 Appendix ...
Page 124: ...115 Appendix ...
Page 125: ...116 Appendix ...
Page 126: ...117 Appendix ...
