Setting The Measuring Ranges - Siemens SIPROCESS GA700 Quick Start Manual

Commissioning: Sequence
8.6 [1.4] Measuring ranges
Measuring range type 1 (mr i < mr (i+1))
The full-scale value of measuring range
measuring range
Um
O
Um
U
So
H
FSV
When the high switchover point of a measuring range is exceeded, there will be a switch to
the next-higher measuring range. If the measured value is lower than the low switchover point
of the next-lower measuring range, the device switches to the lower measuring range.
Measuring range type 2 (mr i ≥ mr (i+1))
The full-scale value of measuring range
of the following measuring range
of-scale values get smaller. The following switchover points are used:
Um
O
Um
U
So
H
FSV
When the high switchover point is violated, there will be a switch to the next-higher measuring
range. If the measured value violates the low switchover point of the next-lower measuring
range, the device switches to the lower measuring range.
8.6.2

Setting the measuring ranges

Procedure
Note
Component-specific setup
Measuring ranges are component-specific. Repeat the procedure described below for all
components, if necessary.
104
. The following switchover points are used:
(i+1)
mbe - 0,1 * ( mbe - mba )
mbe - 0,2 * ( mbe - mba )
High switchover point (= full-scale value mi‐
nus 10 % of the span)
Full-scale value
mba
mba 0,1 * ( mbe - mba )
+
High switchover point (= start value of
measuring range)
Full-scale value
must be less than the full-scale value of the following
i
So Low switchover point (= full-scale value mi‐
L
nus 20 % of the span)
SSV Start-of-scale value
must be greater than or equal to the full-scale value
i
. Because the spans get bigger, the corresponding start-
(i+1)
So Low switchover point (= start value plus
L
10% of the span)
SSV Start-of-scale value
Compact Operating Instructions, 05/2015, A5E31805656-03
Quick Start