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TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Programming the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . 6
Diagnostic Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Network Steup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INTrOduCTION
The Badger Meter Model 340MB Btu transmitter is an economi-
cal, compact device for sub-metering applications that utilizes the
Modbus communications protocol .
The Model 340MB calculates thermal energy using the signal
from a flow sensor installed in a hydronic heating or chilled water
system, and signals from two 10 k
Ω
temperature thermistors,
100
Ω
RTD’s, or 1000
Ω
RTD’s installed in the system’s inlet and
outlet points . The flow input may be provided by any Badger
Meter impeller sensor and many other pulse or sine wave signal
flow sensors .
The onboard microcontroller and digital circuitry make precise
measurements and produce accurate, drift-free outputs . The
Model 340MB is configured using Badger Meter Windows
®
based
programming software . Calibration information for the flow sensor,
units of measurement, and type of temperature sensor may be
preselected or entered in the field . Btu transmitter information is
available when connected to a PC or laptop computer . This infor-
mation includes flow rate, flow total, both T1 and T2 temperature
probe information, energy rate, and energy total .
The Model 340MB transmitter features two LED’s to verify Modbus
and flow sensor input activity .
The Modbus communications protocol allows the Model 340MB
transmitter to be assigned an address, and allow all measurement
parameters to be transmitted on a single 3-wire RS-485 bus .
The Model 340MB Btu transmitter operates on AC or DC power
supplies ranging from 12 to 24 volts .
The compact cast epoxy body measures 3 .65”(93mm) x
2 .95”(75mm) and can be easily mounted in panels, enclosures
or on DIN rails .
PRELIMINARY
