SU2020 SU8020 SU2021 SU8021 SU2621 SU8621
Ultrasonic flow meter
38
10.4.8 Calibration
The calibration factor [CGA] is used to adjust the temperature-viscosity compensation of the sensor to
the characteristics of the medium used. The calibration factor influences the slope of the measurement
characteristic of the flow measurement.
The slope modification of the measurement characteristic is indicated in per cent. The factory
setting is [CGA] = 100%. After a change the calibration can be reset to factory setting.
2
1
140 %
100 %
60 %
MW
V1
V0
V2
Fig. 24: calibration of the
measurement characteristic
1:
calibration factor [CGA]
2:
process value
MW:
measured value
V0:
measurement characteristic at factory setting
V1:
measurement characteristic 1 after calibration
V2:
measurement characteristic 2 after calibration
10.4.8.1 Parameter setting via unit keys: calibration
u
Call up the menu [EF] > [CFG].
u
Select [CGA] and set a value between 60 and 140 % (100 % = factory setting).
10.4.8.2 Parameter setting via IO-Link: calibration
u
Select [Parameter] > [Application configuration].
u
Select [CGA] and set a value between 60 and 140 % (100 % = factory setting).
10.4.9 Totaliser reset
The totalisers Vol.1 and Vol.2 can be reset in different ways:
1. manual reset
2. time-controlled reset
3. reset via external signal
4. reset via overflow (maximum display range is reached).
Totaliser Vol.L cannot be reset.
10.4.9.1 Parameter setting via unit keys: Totaliser reset
1. Manual reset:
u
Go to the [EF] > [TOTL] menu.
u
Select [rTox ] > [Reset] and set [Yes].
w
The totaliser is reset.
2. Time-controlled reset:
u
Go to the [EF] > [TOTL] menu.
u
Select [rTox], then set time in weeks (w), days (d) or hours (h).
w
The totaliser is automatically reset after the set time.
