Toshiba lf516 Manual De Usuario
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(3) Flow Direction
Install
the
detector
in
accordance
with
the
flow
direction
arrow
on
the
detector.
See
Figure
4.7. If the actual flow runs opposite to the specified flow direction, the following
display and output appears.
For single range measurement,
・LCD display:
display and output appears.
For single range measurement,
・LCD display:
Instantaneous flow rate ------------- indicates negative values,
Totalized flow ------------------------ no counts added.
・Outut:
Current output ------------------------ 4.0mA output,
Pulse output --------------------------- No pulses
For bidirectional range measurement, the flow in opposite direction results in a positive
output value. See 10.3, “Multi-range Functions.”
output value. See 10.3, “Multi-range Functions.”
Figure 4.7 Flow direction arrow on the detector
(4) Preventing an Empty Pipe Condition
Design an upright pipe run (Figure 4.8) or sufficient head pressure (Fig. 4.9) at the
downstream detector outlet if there is a possibility of the detector pipe becoming emptied.
downstream detector outlet if there is a possibility of the detector pipe becoming emptied.
Figure 4.8 Detector with an upright pipe run at downstream outlet
Figure 4.9 Detector with sufficient head pressure at downstream outlet
Flow direction arrow
Upright pipe run
Detector
Detector