Brooks Instrument MT3810 - Manual (Page 38)

2-12
Model MT 3810
Installation and Operation Manual
X-VA-MT3810-eng
Part Number: 541B050AHG
June, 2008
Section 2 Installation
8. If desired, the transmitter zero function can be remotely mounted using
a momentary contact switch. Follow the same wiring practices as used
for the other outputs.
9. After installation and powering of the loop, the transmitter must be
zeroed, both electrically and mechanically. This operation will
compensate for any stray magnetic effects in the vicinity of the
transmitter. Flow must be zero when the zero function is activated,
using the remote switch or shorting the zero terminals. The pointer
must also be adjusted to the reference line on the scale using the
adjustment screw on the face of the pointer, next to the hub. The zero
function may be activated as part of a periodical maintenance check.
10.Under actual flow conditions, verify that the transmitter output matches
the mechanical pointer position. If a discrepancy is noted with the
transmitter, the HART communications channel can be used to verify or
adjust the transmitter settings. The Emerson Model 275 hand-held
communicator provides a simple means to accomplish this check
anywhere in the loop. Refer to Figure 3-2 for connection instructions.
11.Proper operation of the inductive alarms can be determined by
manually rotating the mechanical pointer and observing the status lights
on the relay isolator. The small alarm pointers indicate the alarm trip
points. Changes to the set points can be made by loosening the pointer
screws and repositioning the pointers.