Siemens 7MB2335, Руководство по эксплуатации, Страница: 78 / 168

Operation
5-28
Operating instructions ULTRAMAT 23 gas analyzer
C79000-B5276-C216-03
MR1
MR2
0 100 200 300 400 500
mg/m
3
360
Fig. 5-7 Hysteresis curve
5.9.2 Parameters: Limit values
Two limits are assigned to each component, and can be set using this
menu. A relay is triggered when the limits are violated (see Section
5.10.1.2).
Limit 1 is the lower limit, Limit 2 the upper limit.
Notice
A set limit only triggers a relay contact if a relay has been assigned to
the corresponding limit signal (see Section 5.10.1.2).
The limits are not updated:
during the first warm-up phase
during an AUTOCAL
during the message: function check and analog output at ’Hold
measured value’ (see section 5.10.1.1)
If you have selected ”Limit 1” or ”Limit 2”, a dialog appears in which you
can enter the lower or upper limit for each component. You can define
the value in the second line, and the condition under which a contact is
be triggered in the third (
Alarm at conc.: ):
S
High: with upward violation
S
Low: with downward violation
S
- - - - -: no signal; see Fig.
Limit 1 SO
2
Limit 2 SO
2
592
Limit 1 SO
2
Limit 1: 2000 mg/m 3
Alarm at conc.:-----
592a