Yokogawa ADMAG AXR - Manual (Page 85)

<6. PARAMETER DESCRIPTION>
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IM 01E30D01-01EN
IMPORTANT
• If the pipe is empty, the output fluctuates or
the Process Alarm (Signal Overflow) occurs.
The pipe must be fully filled with liquid.
• The instrument checks whether the pipe is
empty or not by measuring the resistance
between the electrode and the ground.
Therefore, it cannot check the status
depending on the conditions in the pipe,
electrode, and noise at the installation sites.
In this case, set this parameter to “No.” Make
sure that the check of the empty status may
fail in the case of a high viscosity fluid or
adhesive fluid.
• It takes 10 to 15 minutes to occur the Empty
Pipe Alarm. The Process Alarm (Signal
Overflow) may occur during the period from
the empty status to the Empty Pipe Alarm.
NOTE
• When using the empty check function, set
the appropriate parameters based on the
above table. The default setting is “No.”
• Each of the setting values has the following
features. Before using the instrument,
confirm what happens in the empty and full
status by checking the setting values in the
order: High → Middle → Low.
Example: In the case of High
1) Set the parameter to “High,” empty the pipe,
and confirm that the alarm occurs. Due to the
Empty Pipe Alarm taking 10 to 15 minutes,
the Process Alarm (Signal Overflow) occurs
in this period. If the Empty Pipe Alarm
does not occur in the empty status, the
empty check cannot be carried out. Set the
parameter to “No” in this case.
2) If the alarm is not released after the pipe
is fully filled with liquid, the setting value is
incorrect. Set the parameter to “Middle” or
“Low” accordingly.
[K20: Empty Status] Display of empty pipe status
This parameter specifies the status of empty pipe
inside the flowtube.
Setting Status
Normal Filled situation
Empty Unfilled situation
[K21: DC Voltage A] Display of the voltage level at
electrode A
This parameter is used to display the DC voltage
level at electrode A. The possibility of adhesion at
the electrode A is higher when this value becomes
high.
[K22: DC Voltage B] Display of the voltage level at
electrode B
This parameter is used to display the DC voltage
level at electrode B. The possibility of adhesion at
the electrode B is higher when this value becomes
high.
[K23: Empty Level] Setting of the voltage level for
empty pipe detection at the electrodes
This parameter is used to set the voltage level for
empty pipe detection. The parameter would be set
as default value without change for typical use.
This parameter is changed to smaller value when
the Empty Pipe Alarm occurs frequently even if the
filled situation.
(10) Menu M: Various Adjustment Function
Setting items
Menu M contains items that are relevant to
automatic adjustments.
[M10: Auto Zero Exe] Execution of automatic zero
adjustment function
→ Refer to the description of parameter B50.
[M11: Autozero Time] Setting of execution time for
automatic zero adjustment
This parameter is used to set the execution time of
automatic zero adjustment.
Use the instrument with the default setting “450
seconds”. When the execution time is short, an
error may occur.
[M12: FL Zero(IEL)] Display of the result of
automatic zero adjustment (excitation current (Low))
This parameter is used to display the result of
automatic zero adjustment (excitation current (Low)
at B50(M10): Auto Zero Exe. It is possible to set
parameters as coefficient value directly.