<6. Operation>
57
IM 01E24A01-01EN
6. Operation
After the installation of sensor into process piping, the
wiring of input/output terminals, the configuration of
required parameters, and the zero adjustment prior to
peration, the flowmeter outputs a flow signal from its
terminals as soon as the fluid is sent in the pipe.
CAUTION
If any damages, such as cracks, breakage or
destruction on the glass of the display occurs, stop
using it and replace the cover. If it is used with
damaged glass, it may cause injury, electric shock,
malfunction, and specified protection performance of
the housing is not provided.
6.1 Pre-operation Zero
Adjustment
Zero adjustment is carried out to ensure that the output
for zero flow is 0% (i.e., 4 mA). Although adjustment to
zero is performed at the manufacturing plant prior to
shipment, this procedure must be carried out once again
following the installation of piping in order to match the
magnetic flowmeter to its operating conditions.
This section describes the zero adjustment procedure
using the display unit. For AXFA11, read the applicable
user’s manual as listed in Table 1.1.
IMPORTANT
• Zero adjustment should be carried out before actual
operation. Note that parameter setting or change
cannot be carried out during execution of zero
adjustment (i.e., for approximately 30 seconds).
• Zero adjustment should only be carried out when
the sensor has been filled with measurement fluid
and the fluid velocity is completely zero by closing
the valve.
• Each time that the fluid being measured is changed,
be sure to carry out zero adjustment with the new
fluid.
6.2 Zero Adjustment from
Display Unit
A procedure of executing zero adjustment is as follows;
Display Menu Path:
Device setup ► Diag/Service ► Autozero ► Execute
Device setup ► Diag/Service ► Autozero ► Result ► Zero value
Enter the Setting Mode. (Read Section 5.3)
For F
OUNDATION
fieldbus type, set mode of all transducer
blocks to “O/S” (Out of Service) before the adjustment.
After the adjustment, set mode of all transducer blocks to
“Auto”.
F0601.ai
Device setup
Process variables
Diag/Service
Easy setup wizard
▲
▼
00 : 00
SET
SFT
INC
►
►
►
Select “Diag/Service” accoriding to the
menu path above.
F0602.ai
Diag/Service
Verification
Autozero
AO/AI trim
▲
▼
00 : 00
SET
SFT
INC
►
►
►
Select “Autozero”.
*: Fieldbus communication type does not have
AO/AI trim.
F0603.ai
Autozero
Execute
Result
▲
▼
00 : 00
SET
SFT
INC
►
Select “Execute”.
F0604.ai
Execute
Not execute
Execute
Not execute
▲
▼
00 : 00
SET
SFT
INC
Select “Execute”.
F0605.ai
Execute
Execute
00 : 00
SET
SFT
INC
When “Execute” blinks, touch [SET] to
execute.
F0606.ai
Autozero function
executing...
00 : 00
00 : 08
SET
SFT
INC
The time remaining
until the end.
Autozero starts, and the progress is
desplayed with a remaining time and a
bar graph. Wait for the completion.
F0607.ai
Autozero
Execute
Result
▲
▼
00 : 00
SET
SFT
INC
►
After Autozero finished, the display
returns to “Autozero” menu.
• Confirmation of zero adjustment result
F0608.ai
Result
Zero value
▲
▼
00 : 00
SET
SFT
INC
For the result of Autozero, select “Result”
and then “Zero value”.
F0609.ai
Zero value
– 00.018cm/s
– 00.018
cm/s
– 99.999
+ 99.999
00 : 00
SET
SFT
INC
Result of Autozero is indicated as on
the left.
Operation
6
