Type / No.
Rev.
Date
Page
Total pages
EW082.695_en
5
02 August 2010
2
28
EsiWelma
s.r.l.
CONTENTS
1 GENERAL
.................................................................................................................................................3
1.1 M
EANING OF SYMBOLS
.......................................................................................................................3
1.2 H
AZARDOUS GAS THRESHOLD
..........................................................................................................3
2 DESCRIPTION OF TERMINAL UNIT
..............................................................................................5
3 INSTALLATION
.......................................................................................................................................8
3.1 I
NSTALLATION OF THE
TUS40-20
T
ERMINAL
U
NIT
.......................................................................8
3.2 T
YPES OF DETECTOR INSTALLATION FOR CORRECT MONITORING
.............................................10
4 USING THE TERMINAL UNIT
..........................................................................................................11
4.1 O
PERATING MODES
..........................................................................................................................11
4.2 M
ONITORING MODE
...........................................................................................................................12
4.3 S
ETTING MODE
..................................................................................................................................13
4.4 C
ALIBRATION MODE
..........................................................................................................................14
4.5 C
ALIBRATING THE SENSOR
..............................................................................................................15
4.6 O
UTPUT TEST MODE
.........................................................................................................................18
4.7 4…20
M
A
SIGNAL CALIBRATION MODE
...........................................................................................19
4.8 T
ROUBLESHOOTING
..........................................................................................................................21
4.9 S
ENSOR OPERATION CHECK
............................................................................................................22
4.10
R
ESIDUAL LIFE
...............................................................................................................................23
4.11
C
HANGING THE CONTRAST ON THE DISPLAY
.............................................................................23
5 INSTALLATION DATA
........................................................................................................................24
6 ROUTINE CHECKS
.............................................................................................................................25
