B-320-2-E
7
6.2 Pushbutton Inspection and Cleaning
Pushbuttons used for operation can be inspected and cleaned by first removing its semicircular panel, with the
flowmeter in the pipeline or not. Be sure to depressurize the air source or remove the front cover to prevent the
shutoff valve from actuation before separating the pushbutton panel.
(1) Take off four hex socket head bolts and remove
the semicircular panel (Fig. 6.4).
Fig. 6.4
CAUTION When separating the
panel, be careful to
prevent pushbuttons and
their springs from coming
off and being lost (Fig. 6.5).
(2) Inspect and clean pushbuttons, their springs, and
button sockets on the part of the register front
cover.
(3) Following inspection and cleaning, install
pushbuttons into place according to their colors.
(See pushbutton colors on the previous page.)
Spring
Pushbutton
Panel
Hex Socket Head Bolt
(M4 × 10 w/spring washer)
Fig. 6.5
Cleansing Spray
Fig. 6.6
CAUTION
1. The panel is made of resin. Tighten bolts at
150cN
•
m.
2. Avoid immersion of the panel and pushbuttons
in solvent such as thinner, as these parts are
made of resin.
RUN
OUT
ALM
COUNT
END
X
L
BATT
a
b
c
d
e
f
g
Batch setpoint counter (6-digit)
Flickers to show a low battery
Lights to show an alarm
Lights in response to pulses
arriving at total counter
Lights at the end of a batch
Cumulative total counter (8-digit)
With LW76E (2-step open and close):
1-step open (small valve: SV) Segment c lights in response to an operation signal output
→
Partially open
2-step open (main valve: MV) Segment b lights in response to an operation signal output
→
Fully open
Lights in response to a shutoff
valve operation signal output
Fig. 6.3
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