Azbil MVC10A, User Manual

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Azbil Corporation Maintenance and troubleshooting of this instrument
Model: MVC10A/10F - Multivariable Air Flow Meter 5-7
In addition to the above-mentioned items, check the following items:
• Is air flowing?
• Is any fluid other than air flowing?
• Is the flow direction correct?
• Is there not any leakage in pipe joints?
• Is there not any loosening of tightened bolts on the product side?
• Is there not any sagging or open circuit in wiring?
• Is there not any error in wiring connection?
• Are the power voltage and load resistance as specified?
• Is there not any abnormality such as clogging, foreign matter, or deformation of
detector?
• Is there not any clogging or foreign matter in the connecting tube from the
detector to the converter? (In the case of MVG10F)
• Are the pressure and temperature as specified?
• Is there not any intense magnetic or noise generating source located nearby?
Display and output state beyond the range of flow rate measurement
When flow rate is beyond the limits of the measuring range, the displayed and the
output values are as follows:
Overload condition
Conditions when
exceeding allowable
maximum flow rate
value setting
Conditions when
exceeding the flow
rate range
Conditions
beyond JIS
standards
differential
pressure >
static pressure
× 0.25
Main display Flashing Flashing Flashing Flashing
Instantaneous flow
rate (cost) display
“HHHH” displayed “HHHH” displayed
URL display
included
Display
% output display “HHHH” displayed “HHHH” displayed Display Display
Sub display
Instantaneous flow
rate (cost) display
“O/L” displayed “OverFlow” displayed Display Display
Static pressure
display
“O/L” displayed Display Display Display
Flow velocity “O/L” displayed “OverFlow” displayed Display Display
% output display “O/L” displayed “OverFlow” displayed Display Display
Display damping
Displayed in 0 second
damping
Displayed in 0 second
damping
Displayed
per damping
instruction
Displayed
per damping
instruction
4 - 20 mA output 3.8 mA maximum 20.8 mA minimum
Output up to 20.8
mA
Measured
values output
Output damping Normal operation Normal operation Normal operation
Normal
operation
Pulse output Interrupted Interrupted
Counted up to
URL
Measured value
Totalized flow (cost)
calculation
Interrupted Interrupted
Calculated up to
URL
Measured value
Leak check
Check the static
pressure at the start of
flow. (Specified in the
User's Manual.)
Use the measured
value
Use the measured
value
Use the
measured value
Auto ranging (peak
value)
Do not used the
measured value.
URL
Use the measured
value
Use the
measured value