12
X-VA-MT3809G-MT3810G-eng/541B182AAG/A/2022-10
Brooks Instrument
Installation Manual MT3809G & MT3810G
Section 1 Introduction
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• Bell-202 modulated HART digital communication over the 4-20 mA signal
• Current loop powered 2-wire connection
• User selectable 0% and 100% analog output ranges with optional
smoothing
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temperatures, densities, etc.
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Description
The 4-20 mA with HART transmitter is a compact microprocessor device
designed to interface directly with the Model MT3809. This transmitter
includes a Hi- and Lo alarm switch output and a pulse output.
The HART digital communication signals are superimposed on top of the
4-20 mA signal, allowing communication of more than just the process
variable.
The transmitter is HART-programmable or for numerous variables such as
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shipment, commonly used default values are programmed by Brooks to
ensure ease of operation and quick startup. However, parameters may be
reprogrammed by the user if needed. Flow rate information may be viewed
locally at the meter scale, LCD display or displayed remotely.
Power
supply
voltage
21
to
30
Vdc:
(2
Ͳ
wire
current
loop
transmitter)
Loop
current
/
current
consumption
range
3.8
to
22.0
mA.
Open
collector
alarm
output
Optically
isolated
outputs
assignable
to
alarms.
•
Max.
off
Ͳ
state
voltage:
30
Vdc
•
Max.
off
Ͳ
state
current:
0,05
mA
•
Max.
on
Ͳ
state
voltage:
1.2
Vdc
•
Max.
on
Ͳ
state
current:
20
mA
Optically
isolated.
Scalable
to
a
variety
of
engineering
unit
systems
(pulses
per
liter,
gallons,
etc.).
•
Range:
1
Hz
to
1
kHz
•
Max.
off
Ͳ
state
voltage:
30
Vdc
•
Max.
off
Ͳ
state
current:
0.05
mA
•
Max.
on
Ͳ
state
voltage:
1.2
Vdc
•
Max.
on
Ͳ
state
current:
20
mA
Temperature
Specification
See
Temperature
Cut
Ͳ
off
Table
M20
x
1,5
according
to
ISO
(1/2"
NPT,
3/4”
NPT
(F)
or
cable
gland
optional)
•
Brass/Nickel
plated
cable
gland
cable
diameter
range
8
Ͳ
11
mm
(Aluminum
housing)
•
Stainless
steel
cable
gland
cable
diameter
range
7
Ͳ
10.5
mm
(SS
housing)
Linearity
Less
than
1%
at
max.
current.
Temperature
influence
Less
than
0.04%
per
°C.
Voltage
influence
Less
than
0.002%
/
Vdc.
Load
resistance
influence
±
0.1%
full
scale.
HART
Revision
HART
Ͳ
7
Hi
Ͳ
and
Lo
Ͳ
alarm
outputs
Pulse
Output
Electrical
Connector
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Current Loop 4-20 mA with HART Transmitter, with Alarms, Display and Pulse Output
