Brooks Instrument MT3809G - Manual (Page 34)

2-4
Installation and Operation Manual
X-VA-MT3809G-MT3810G-eng
Part Number: 541B182AAG
September, 2013
Models MT3809G & MT3810G
Section 2 Installation
2-6 Installation of the Model MT3809 Flowmeter with a Transmitter with or without Optional Alarms and
Pulse Output.
a. Install the meter as described in Section 2.5
b. Transmitter setup is done solely through proper system wiring and
parameter configuration. Common transmitter parameters are set by
Brooks prior to shipment. These parameters, such as flow rate, are set
based on order information, meter configuration or defaults inherent to the
transmitter. If requested when ordering the electronics, all parameters will
be set prior to receiving the unit and no further configuration will be needed
at installation. However, more detailed configurations as well as on-line
monitoring can be done through standard HART
communication protocol,
or can be set using a hand-held HART R communicator. See Operations
Section 3 for manual programming details.
With a HART protocol compatible transmitter, the digital communication
signals are superimposed on top of the 4-20 mA signal. Communication of
more than just the process variables is possible.
The float is constructed with an integral magnet that activates a magnetic
sensor that is part of the transmitter. This same float magnet also drives
the mechanical pointer. The flow rate is scaleable by setting independent
high and low range parameters. The analog output (AO) transmitter
parameters, AO Hi-Range and AO Lo-Range span the 4-20 mA signal. For
example, if flow rate is normally between 100 and 500 gpm, the AO Hi-
2-5-1 Installation and Maximum Torques of Model MT3809 ETFE
MAXIMUM TORQUES MODEL MT3809 ETFE
Please refer to Table 2-1 below.
• Select bolts and gaskets (customer supply) in keeping with the flange
pressure rating or the operating pressure. Also note corrosion resistance
and thermal stability.
Important: the inside diameter of the flanges deviates from the standard
dimensions.
Enlarge the flange gaskets to the appropriate size.
• Align gaskets, tighten nuts using the torques specified for the relevant
pressure ratings.
• Measuring section with E/TFE line with PTFE sealing face
PTFE is deformable under pressure in the cold state.
• Tighten the flange bolts nuts only with the following maximum torques:
• Advised bolting acc. ASTM A307 Grade B)
Nominal size to Bolts Max. torque
ANSI B 16.5 ANSI ANSI 150 lbs
inches lbs 150 lbs 300 lbs Nm ft. lbs
1/2" 150/300 4 x 1/2" 4 x 1/2" 3.5 2.5
1" 150/300 4 x 1/2" 4 x 5/8" 6.7 4.8
2" 150/300 4 x 5/8" 8 x 5/8" 24.0 17.4
Table 2-1 Maximum Torques Model MT3809 ETFE