11
Chapter 3. MOUNTING AND WIRING
Behavior when the flowrate greatly exceeds the upper limit of flowrate
range
When the flowrate exceeds the upper limit of flowrate range, both the
flowrate display and the output voltage/current may indicate lower
values than the actual flowrate. Be sure to use this product within the
flowrate range stated in the specifications.
If the actual flowrate exceeds 120 % of the upper limit, both the
flowrate display and the output voltage/current will stop increasing in
proportion to the flowrate.
If the flowrate is more than 200 % of the upper limit, both the flowrate
display and the output voltage/current will begin to decrease, giving
the appearance that the flowrate is within the flowrate range limits.
Also, if there is a sudden greatly excessive flowrate (200% of the
upper limit or more) for a very short period, the flowrate display and
the output voltage/current will continue to indicate flow within the
flowrate range, without indicating the spike.
Especially when this device is used for flow control, make sure to take
appropriate measures, such as controlling the supply pressure or using
a throttle valve, so that even at maximum control output, the flowrate
does not exceed 120% of the upper limit.
Actual flowrate
Flowrate display
and
output voltage/current
100%
Upper limit
200%
Flowrate range
120%
