Azbil MagneW Two-wire PLUS+ MTG15A, Руководство пользователя

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5-14
5-5-2. Auto zero adjustment
Auto zero must be carried out only under the condition when the detector is filled with
process fluid at zero flow. Run this function only after installing the electromagnetic
flowmeter to the process pipe. Performing this function under a condition where the process
fluid is not at zero flow may cause measurement errors.
Set range: None in particular
Default: None in particular
Note) The zero adjustment takes approx. two minutes. During the zero adjustment, the output
of analog current may rise to approx. 9 mA in some cases. This is not abnormal. To carry
out the zero adjustment, set the control loop to manual.
Make the auto zero adjustment in accordance with the following procedure:
Step Procedure Screen
1 The screen at right is a screen display example in
MEASURING MODE (measurement state). Press the
MODE key.
1.0 %
01.94 m 3 /h
00069401
2 The OPERATOR'S MODE screen appears for approx.
two seconds and then the damping setting screen
appears.
1.0 %
* OPERATOR'S
MODE
1.0 %
* DAMPING
005.0 s
3 Press the

key once to display the screen as shown.
0.0 %
* AUTO ZERO
READY
4 Press the

key to move the cursor to the position
READY.
0.0 %
* AUTO ZERO
READY
5 Press the

key to start the auto zero adjustment. If
the main display selects % flowrate, the display of 0.0
blinks during adjustment. With the adjustment
completed, the display stops blinking with ON
switched to READY.
This zero adjustment takes about two minutes.
0.0 %
* AUTO ZERO
ON
0.0 %
* AUTO ZERO
READY
6 Press the

key to move the cursor to the position
under *.
Press the MODE key to return to the MEASURING
MODE and save data.
0.0 %
* AUTO ZERO
READY
CAUTION
You have only ten minutes to return to MEASURING MODE to save the new value before
the system resets it to the previously saved value.