Badger Meter 340LW User Manual
Badger
®
Series 340LW
Btu Transmitter
With LONWORKS
Installation &
®
Operation Manual
BadgerMeter, Inc.
872038
Rev. 6 4-09
The Badger Meter Series 340LW Btu Transmitter is an economical, compact device for submetering applications that use the LONWORKS® protocol in an addressable network.
The Series 340LW calculates thermal energy using the signal from a fl ow sensor installed in
a closed pipe system, and the signals from two 10kΩ temperature thermistors installed in the
systems inlet and outlet points. The fl ow input may be provided by any Badger Meter sensor and
many other pulse or sine wave signal fl ow sensors.
The onboard microcontroller and digital circuitry make precise measurements and produce
accurate, drift-free outputs. The Series 340LW is commissioned using Badger Meter Windows®
based software. Calibration information for the fl ow sensor, units of measurement and output
scaling may be preselected or entered in the fi eld. While the unit is connected to a PC or laptop
computer, real-time fl ow rate and total, temperatures and energy rate and total are available.
The Series 340LW Transmitter features three LED’s to verify input and output signals.
The LONWORKS communications protocol allows the Series 340LW to be assigned to any one
of 255 addresses on a single 2-wire buss. Outputs may include raw data such as fl ow rate and
temperature of either thermistor, or computed or stored data such as: energy rate; energy total;
fl ow total; or temperature differential.
The Series 340LW Btu Transmitter operates on AC or DC power supplies ranging from 12 to 24
volts.
The compact cast epoxy body measures 3.65 inch (93mm) x 2.95 inch (75mm) and can be easily
mounted on panels, DIN rails or enclosures.
2
INSTALLATION
2.10”
(53.3mm)
3.65”
(92.7mm)
2.95”
(74.9mm)
.88”
(22mm)
.60”
(15mm)
Mechanical installation
The Badger® Series 340LW transmitter may be surface mounted onto a panel, attached to DIN rails using
adapter clips or wall mounted using two optional enclosures.
Location
Although the Series 340LW device is encapsulated, all
wiring connections are made to exposed terminals. The
unit should be protected from weather and moisture in
accordance with electrical codes and standard trade
practices. In any mounting arrangement, the primary
concerns are ease of wiring and attachment of the
programming cable. The unit generates very little
heat so no consideration need be given to cooling or
ventilation.
Series 340LW Dimensions
Surface Mount Installation
The Series 340LW may be mounted to the surface of any panel using
double-sided adhesive tape or by attaching fasteners through the holes
in the mounting flanges of the unit.
Din Rail Mounting
Optional clips snap onto the mounting flanges allowing the Series
340LW to be attached to DIN 15, 32, 35 mm DIN rail systems.
5.125”
3.25”
To p
4.60”
Wall Mounting
4.60”
Side
Optional metal and plastic enclosures are available to mount
the Series 340LW to a wall when no other enclosure is used.
The enclosure is first attached to the wall using fasteners
through its mounting holes. After wiring, the transmitter may
be attached to the enclosure with the terminal headers fac-
2.25”
Side
ing in using the slots in the mounting flanges. As an alternate
mounting arrangement, the Series 340LW may be fastened to
340LW Plastic Box Dimensions
To p
4.5”
Side
Side
340LW Metal Box Dimen-
sions
4.50”
2.00”
3
the box cover using double-sided adhesive tape.
Temperature Sensor Installation
The location of the temperature sensors with regard to the flow
sensor is important for the accuracy of the energy calculation.
Temperature sensor T1 must be located closest to the flow sensor.
A distance of 5 pipe diameters will give the greatest accuracy.
Always install the temperature sensor downstream of the flow
sensor.
3/32” Flathead
Screwdriver
Wire
Series 300
Connector
Electrical Installation
All connections to the Badger® Series 340LW are made to screw
terminals on removable headers.
Side View - Typical 300 Series Removable Connector
Wiring
Power Supply Wiring
The Series 340LW requires 12-24 Volts AC or DC to operate. The power connections are made to the
ORANGE header. The connections are labeled beside the header. Observe the polarity shown on the label.
When powered with AC power provided by a
transformer secondary the Series 340LW causes DC
current to fl ow in the transformer secondary. When
several Series 340LWs are powered in parallel by the
same transformer secondary, the currents will add and
a suffi cient secondary DC current may fl ow to cause
transformer core saturation. Improper operation may
result.
When powering multiple Series 340LWs, a DC
power supply with appropriate output capability should
be used to prevent this situation. For instance, Sixteen
Series 340LWs will require 16 x 70mA = 1120mA. A 1.5
Amp, 12-24 Volt DC power supply would handle such a
load.
When operating a Series 340LW from AC
Sample Power Supply Wiring Diagram
power, one side of the AC voltage source should be
grounded to earth ground. This grounded AC source side should be connected to the Series 340LW “ACC/
DC-” power input terminal, the other side being connected to the Series 340LW “ACL/DC+” terminal. (This
arrangement is like that in normal 110 VAC power, which has a “neutral” or common side and a “hot” or line
side.
For optimal noise immunity and when operating the Series 340LW with a “zero threshold, sine
wave” fl ow sensor, the ground lug on the Series 340LW should be connected to earth ground.
If a Badger Meter plug in type power supply (Model A-1026 or A-503) is used, connect the black/white
striped wire to the terminal marked positive (+) and the black wire to the terminal marked negative (-).
Note:
Included with every Series 340LW is a Model 340LWIK kit containing a screw,
lockwasher and ground lead to connect the Series 340LW to earth ground. Connect
the earth ground lug of the series 340LW to a solid earth ground with as short a wire
as possible. This will help prevent electrical interference from affecting the Series
340LW’s normal operation.
4
Sensor Wiring
10KΩ Thermistors
Supply
Return
To O N OR K S
Network
LW
®
Not Polarity
Sensitive
Red
Black
Shield
(if applicable)
Series 200
or
SDI
All flow sensor types connect to the four terminal
header labeled “sensor input”.
Series 200
Connect the red wire to sensor signal (+), black wire
to sensor signal (-) and the bare wire to shield.
SDI Series
Connect the plus (+) terminal of the sensor to
sensor signal (+) on the transmitter and the minus
(-) terminal of the sensor to sensor signal (-) on the
transmitter. Connect the shield terminal of the sensor
to the shield terminal of the transmitter.
Other Sensors
The sensor input Power Out terminal supplies
nominal 12VDC excitation voltage for 3 wire sensors.
Sample Sensor Wiring Diagram
Connect sensor signal + and sensor signal - wires to transmitter terminals.
Thermistor Wiring Diagram
Temperature Element Wiring
The Badger Meter thermistors are not polarity sensitive.
Connect thermistor closest to the flow sensor to Series 340
terminal block marked TEMP 1 and the other thermistor wires to
Series 340 terminal marked TEMP 2.
Connecting the L
ONWORKS
®
Bus
The LONWORKS network connection is not polarity sensitive.
Refer to”commissioning” section
5
Loading...