8.3.1.3 Parameters: Measuring ranges: Hysteresis
8313
Hysteresis AUTORANGE
MR1 400 mg/m SO2
MR1->MR2: 100.0% MR1
MR2->MR1: 90.0% MR1
3
In the third and fourth lines of this dialog, you can set the value
at which the analyzer switches from one range to the other. The
values are specied in % of the full-scale value of range 1 (MR1)
(see section Parameters: Measuring ranges: Setting measuring
ranges (Page 129)).
Note
The hysteresis is only active if the "Actual range" parameter has
been set to the value "AR" (autoranging) in the dialog "Switch
ranges"(Parameters: Measuring ranges: Switch ranges
(Page 128)).
The two switchover points should be as far apart as possible, and
the switchover point from MR1 to MR2 must be greater than that
from MR2 to MR1.
05
05
PJP
The following conditions have been assumed in the display:
• Your analyzer has two ranges:
– MR1 from 0 to 400 mg/m
3
– MR2 from 0 to 2000 mg/m
3
.
• The hystereses are dened as:
– MR1->MR2 at 100%
– MR2->MR1 at 90%.
This means:
• If your analyzer is working in the smaller range (MR1), it
switches over to the larger range (MR2) when a value greater
than 400 mg/m
3
SO
2
is measured
• If your analyzer is working in the larger range (MR2), it
switches over to the smaller range (MR1) when a value less
than 360 mg/m
3
SO
2
is measured (=90% of 400 mg/m
3
).
8.3.2 Parameters: Limits
832
Limit 1 SO2
Limit 2 SO2
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 Conguration: Inputs/outputs/pump: Assign relays
(Page 140)). Limit 1 is the lower limit, Limit 2 the upper limit.
Functions
8.3 Parameter
ULTRAMAT 23
130 Equipment Manual, 04/2022, A5E37100388-012
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