Brooks Instrument MT3810 - Manual (Page 57)

4-5
Installation and Operation Manual
X-VA-MT3810-eng
Part Number: 541B050AAG
December, 2008
Model MT 3810
Section 4 Maintenance
d. Sizes 10 (1"), 12 (1 1/2"), 13 (2") NPT Gas Service
1. Remove the meter from the process line and lay the meter horizontal
on a table.
2. Remove the top/outlet screw (#5).
3. Loosen the float assembly by holding the damper in place with a pin
(1/8” diameter) in the top while loosening the inlet/bottom fitting. Gently
push the float assembly out through the inlet/bottom.
4. To clean the gas damper, unscrew the cylinder head (#6). Then remove
the bolt (#7) and take out the small piston carefully so as to not damage
the critical surfaces.
5. Reassemble the meter by inserting the float assembly with damper into
the inlet/bottom of the meter. Secure the inlet/bottom screw by holding
4-3 Meter Indicator Reference Mark (Zero) Adjustment
This adjustment is performed with no process flow with the float resting on
the guide vane or the inlet end fitting.
a. Completely stop fluid flow through the indicator.
b. Remove the four screws securing the indicator housing window and
remove the gasket and cover.
c. Turn the slotted screw on the bottom of the point until the pointer is in
line with the reference (zero) mark on the scale.
d. Replace the indicator housing cover with gasket and secure with the
four screws.
4-4 Smart Meter Manager Transmitter Replacement with or without Alarms and Pulse Output
The transmitter is a self contained unit matched specifically to the
associated flowmeter. If there is a need to replace, please contact your
nearest authorized Brooks Service Representative.
4-5 Inductive Alarm Replacement
a. Remove the front cover of the indicator housing by removing the four
screws securing it.
b. The wires from the alarm switch(es) are plugged into the alarm terminal
circuit board and must be unplugged for replacement.
c. Loosen the two screws securing the scale, with the alarm switches
attached, and remove the scale.
d. Turn the scale over and locate the screw centered in the green alarm
switch. Remove the screw being careful not to lose the nut on the outside
of the alarm set bracket. Remove the alarm switch from