Brooks Instrument MT3809E - Manual (Page 62)

4-8
Section 4 Maintenance
Models MT 3809 and 3819
Installation and Operation Manual
X-VA-MT3809-3819-eng
Part Number: 541B049AHG
September, 2008
4-2b Meter Float Replacement and Cleaning (MT 3819)
Flanged Connections, All Sizes, Liquid or Gas
1. Remove the meter from the process line and lay the meter
horizontal on a table.
2. With a screwdriver, carefully loosen the inlet and outlet inserts (#3,
#5).
3. Continue to pull until the inlet and outlet inserts are removed from
the meter.
4. Remove the float (#4) and tapered insert (#2) from the meter.
5. Reassemble by reinserting the float (#4) and tapered insert (#2). And
then gently push the inlet and outlet inserts (#3, #5) into the flanges.
Sizes 10 (1"), 12 (1-1/2") and 13 (2") meters, be careful to line up
the top of the float assembly shaft with the outlet insert to ensure
proper fit.
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