Badger Meter 340N2 Manuale utente

Transmitters

Model 340N2 Btu

XMT-UM-01655-EN-08 (March 2016) User Manual

Transmitters, Model 340N2 Btu

CONTENTS

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Scope and Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Surface Mount Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Din Rail Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Temperature Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Power Supply Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Series 200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

SDI Series (standard pulse output option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Other Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Temperature Element Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Pulse Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Connecting the N2 Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Programming the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Metasys Network Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Page 2 March 2016XMT-UM-01655-EN-08

Description

DESCRIPTION

The Badger Meter Model 340N2 Btu transmitter is an economical, compact device for sub-metering applications using

Johnson Controls Metasys® Network Companion and Facilitator Supervisory Systems.

The Model 340N2 transmitter works in conjunction with a flow sensor and two temperature sensors to calculate thermal

energy by measuring liquid flow and inlet and outlet temperatures in a closed pipe system. The transmitter requires two

10 kΩ thermistors for temperature input. The transmitter can accept the signal from most Badger Meter raw pulse flow

sensors, as well as many other pulse and sine wave devices.

The onboard microcontroller and digital circuitry make precise measurements and produce accurate, drift-free outputs. The

Model 340N2 transmitter is configured using Badger Meter Windows® based programming software. Calibration information

for the flow sensor, units of measurement and output scaling may be preselected or entered in the field. Btu transmitter

information is available when connected to a PC or laptop computer. This information includes real-time flow rate, flow total,

both T1 and T2 temperature probe information, energy rate, and energy total.

The Model 340N2 transmitter features two LED’s to verify input and output signals.

The primary output is the Johnson Controls N2 communications protocol that allows the Model 340N2 transmitter to be

assigned an address and allow all measurement parameters—inlet and outlet temperature, flow rate, flow total, energy rate

and energy total—to be transmitted from as many as 32 units on a single 3-wire RS-485 bus.

The secondary output for the Model 340N2 transmitter is an isolated solid state switch closure that is user programmed for

units of energy or flow. The output pulse width is adjustable from 50 mS…5 sec.

The Model 340N2 transmitter operates on AC or DC power supplies ranging from 12…24 volts.

The compact cast epoxy body measures 3.65 x 2.95 inches (93 x 75 mm) and can be easily mounted in panels, enclosures or

on DIN rails.

A B C D E

1.60 in. 2.95 in. 3.65 in. .88 in. .60 in.

41 mm 75 mm 93 mm 22 mm 15 mm

Figure 1: Model 340N2 dimensions

SCOPE AND PURPOSE

This manual provides instructions for installing and programming the Model 340N2 Btu transmitter.

Page 3March 2016 XMT-UM-01655-EN-08

Installation

INSTALLATION

Mechanical Installation

The Model 340N2 transmitter can be surface mounted onto a panel, attached to DIN rails using adapter clips or wall mounted

using optional enclosures.

Location

Although the 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.

Surface Mount Installation

The Model 340N2 transmitter can 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 transmitter to be attached to DIN 15, 32, 35 mm DIN rail systems.

Wall Mounting

Optional metal and plastic enclosures are available for the Model 340N2 transmitter. 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 facing in using the slots in the

mounting flanges. As an alternate mounting arrangement, the Model 340N2 transmitter can be fastened to the box cover

using double-sided adhesive tape.

4.5”

4.50

”

2.00

”

Side

Top

Side

Figure 2: Metal box dimensions

4.60”

4.60

”

2.25”

Side

Top

Side

3.25”

5.125”

Figure 3: Plastic box dimensions

TEMPERATURE SENSOR INSTALLATION

The location of the temperature sensors with regard to the flow sensor is important to 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.

Page 4 March 2016XMT-UM-01655-EN-08

Electrical Installation

ELECTRICAL INSTALLATION

All connections to the Model 340N2 transmitter are made to

screw terminals on removable headers.

Power Supply Wiring

The Model 340N2 transmitter 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.

If a Badger Meter plug in type power supply (Model A-1026 or

A-1028) is used, connect the black/white striped wire to the

terminal marked positive (+) and the black wire to the terminal

marked negative (–).

Figure 4: Side view of typical Series 300 removable connector wiring

OTE:N Included with every Model 340N2 transmitter is a

Model 340N2IK kit containing a screw, lockwasher

and ground lead to connect the transmitter to earth

ground. Connect the earth ground lug of

the Model 340N2 transmitter to a solid earth

ground with as short a wire as possible. This will

help prevent electrical interference from affecting

normal operation.

Figure 5: Sample power supply wiring diagram

Sensor Wiring

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. See Figure 6.

SDI Series (standard pulse output option)

Connect SDI number 3 sensor signal to the Model 340N2

transmitter sensor signal (+) and the SDI number 2 sensor

common terminal to Model 340N2 transmitter sensor signal

(–). Connect the shield terminal of the SDI sensor to the shield

terminal of the Model 340N2 transmitter.

Figure 6: Sample sensor wiring diagram

Other Sensors

The sensor input Power Out terminal supplies nominal 12V DC excitation voltage for three wire sensors. Connect sensor signal

+ and sensor signal – wires to transmitter terminals.

OTE:N The green input LED toggles on and off as sensor pulses are received. With no flow input the LED will remain in its last

state (either on or off).

Page 5March 2016 XMT-UM-01655-EN-08

Electrical Installation

Temperature Element Wiring

Badger Meter thermistors are not polarity sensitive.

Connect the thermistor closest to the flow sensor of the

Model 340N2 transmitter terminal marked Temp 1 number

3 and number 2. Connect the other thermistor wires to the

transmitter terminal marked Temp 2 number 3 and number 2.

Figure 7: Thermistor wiring diagram

Pulse Output Wiring

The Model 340N2 transmitter has solid state switch output,

rated for a maximum sinking current of 100 mA @ 36V DC. In

most cases the transmitter pulse out (+) will connect to the

input pulse (+) and the pulse out (–) terminal to the input

pulse (–) of the receiving device. The separate two terminal

removable header on the Model 340N2 is labeled Output.

Observe the electrical polarity of the output.

OTE:N When the solid state switch is closed the red output

LED will turn on.

Figure 8: Sample pulse output wiring

Connecting the N2 Bus

Observe polarity when connecting the Model 340N2 transmitter. Connect the N2+, N2- and Ref to the appropriate

connections in the N2 network.

OTE:N The Model 340N2 transmitter default address must be changed before it is introduced into an existing network to

avoid any possible address conflicts. See “Programming” on page 7 programming instructions.

If the transmitter is connected at the end of the N2 network, jumpers W1 and W2 can be shorted for biasing and terminating

of the network. The Model 340N2 biasing circuitry is shown in the diagram in Figure 10.

Figure 9: Sample wiring to N2 network Figure 10: Biasing circuitry

Page 6 March 2016XMT-UM-01655-EN-08

Programming

PROGRAMMING

Prior to introducing the Model 340N2 transmitter to an N2 network, it needs to be configured for the pipe size and desired

units of measure. In addition, the default network address should be changed to an unused address to avoid any conflicts

with other instruments on the N2 network. Programming the Model 340N2 transmitter is accomplished using Badger Meter

computer software, available at www.badgermeter.com.

1. Load the software on the computer.

2. Connect the Model 340N2 transmitter to the computer using the Badger Meter Model A-302 programming cable. (If the

A-302 programming cable is not available, a B&B Electronics Model 485SD9TB can be used.)

• Connect the RS232 side of the cable to the computer serial COM port. A USB to serial port adapter can be used.

• Connect the RS485 side of the cable to the transmitter RS-485 connector.

3. Connect the transmitter to a power supply.

4. Launch the software application.

5. Select 340 from the Device option in the menu bar and N2 from the Device Type drop-down menu as shown in Figure 11.

6. From the Conguration option in the menu bar, select Set Comm Port. The Comm Settings window opens as shown in

Figure 12.

OTE:N If you need help determining the correct COMM port, go to Windows Control Panel> System> Device

Manager> Ports to find the Comm port.

7. Select the Comm port. Then click OK.

Figure 11: Device 340 N2 Figure 12: Set Comm port

8. Set the transmitter Address. The transmitter must have a unique address to establish communication. The default Address

is 248 when the transmitter is new.

Page 7March 2016 XMT-UM-01655-EN-08

Programming

• If you know the current transmitter Address, click Change to open the Address window and select the correct

Address from the drop-down menu. See Figure 13.Then click Apply.

• If you do not know the Address of the current transmitter or other devices on the string that might be in conflict,

select N2 Advanced Settings (Figure 14) to open the Advanced N2 Configuration window. Then click Scan to see the

list of known Addresses.

To scan for other devices on the network string, the three wire RS-485 network wires must be added to the Three

Terminal A-301-20 cable connector.

When the Scan is complete, scroll down to see the last assigned Address. Then click the New Address drop-down

menu to select the next Address number for the transmitter, and click Assign. The example in Figure 14 shows 154 is

assigned. Click Exit to close the N2 Advanced Settings window. The new Address number you assigned will display at

the bottom of the screen in the Target N2 Address field. See Figure 15.

OTE:N The“Target N2 Address”must match the current setting in the 340N2. The Address cannot be changed

unless the current Address matches the existing 340N2 Address. If the A-302 cable is used alone, the only

Address found will be the 340N2 itself.

Figure 13: Change Address Figure 14: Scan Addresses

9. When the Device Type, Comm port and Address have been

properly selected, click the Poll Now button to establish

communication (Figure 15).

The dashes on the screen will be replaced with values.

• Poll Now is used to refresh the screen and update the

values.

• Auto Poll automatically refreshes the screen

approximately every 5 seconds.

OTE:N If Poll Now or Auto Poll are not selected, the

values displayed will not be current.

• Clear Totals can be used to reset the totals to zero.

10. Click the Parameters button to open the Parameters

screen for programming the transmitter. See “Programming

the Transmitter” on page 9 for details.

Figure 15: Poll Now

Page 8 March 2016XMT-UM-01655-EN-08

Programming

Programming the Transmitter

Figure 16: Parameters screen

Program the transmitter using the diagram in Figure 15 as a reference.

1. Select the ow sensor type and enter the K and Oset values. See Note #1.

2. Select the desired temperature sensor units.

3. Select the method of computing the temperature dierential. See Note #2.

4. Select the desired ow rate and total units.

5. Select the desired energy rate and total units.

6. Select the output units per pulse and the pulse width.

7. Click Send to transmit the calibration data to the transmitter.

Other options:

Refresh: Rereads the unit and refreshes the screen with the current transmitter settings. This option will overwrite any

changes not sent to the transmitter.

Defaults: Restores the factory default settings to the screen.

8. Click Exit to close the Parameters screen and return to the main screen.

OTE:N #1 Badger Meter sensors are pulse type sensors. The K and Offset information is printed in the owner’s manual

shipped with the product. Calibration constants for other sensors must be supplied by the manufacturer.

OTE:N #2 Typically the Temperature measured by T1 will be greater than T2 in a heating application, and less than T2 in a

cooling application. The selection of one of these choices will determine if energy calculations are made for heating

only (T1>T2), cooling only (T1<T2), or both (absolute).

OTE:N #3 Filter Coefficients (Advanced) allows adjustment of the flow and energy filters. A scale of 0…10 is used with 10

providing the greatest degree of smoothing. Decreasing the filter setting to less than the default value (5) makes

the readings sensitive to noise. Increasing the filter setting can make computed values slow to respond to legitimate

changes in flow and temperature. Either may affect accuracy.

Page 9March 2016 XMT-UM-01655-EN-08

Metasys Network Setup

METASYS NETWORK SETUP

To incorporate point data into the Metasys Network and the Metasys Companion Network, the following Point Map

is provided.

NPT1NPA2UNITS POINT DESCRIPTION RANGE/VALUE NOTES

Binary output (2:4)

BO 01 n/a Reset total 1 = reset totals Note 1

Float data (1:5, 2:5)

ADF 01 gpm (flow rate conv coeff) Flow rate 0– max float

ADF 02 gallons (flow total conv

coeff) Flow total 0– ((2^32) –1)

ADF 03 kBtu/hr (energy rate conv

coeff) Energy rate 0– max float

ADF 04 Btu (energy total conv coeff) Energy total 0– ((2^32) –1)

ADF 05 °F or °C Temp1

ADF 06 °F or °C Temp2

ADF 07 n/a Flow rate conversion coefficient 0– max float

ADF 08 n/a Flow total conversion coefficient 0– max float

ADF 09 n/a Energy rate conversion coefficient 0– max float

ADF 0A n/a Energy total conversion coefficient 0– max float

Integer date (1:6, 2:6)

ADI 01 n/a Note 2

1Network Point Type

2Network Point Address

OTE:N #1 This point resets flow and energy totals when sent an override of value 1. It will recognize this command, but keep

a value of 0 always.

OTE:N #2 0 = Fahrenheit; 1 = Centigrade

Badger Meter has decided not to implement the change of state feature in the Model 340N2 Btu transmitter. By our decision

not to use this feature, normal Metasys COS (alarm limits for analog values and normal condition for binary) notification will

be defeated. If COS notification is required, it is necessary for the operator to perform the following:

1. Map the specic object(s) requiring COS to a CS object.

2. Dene an AD or BD object with the CS object of the required COS point, as the associated in.

3. Assign alarm limits to the AD.

4. The AD or BD point will only be scanned at a minimum of 30 seconds.

5. The normal state of the BO must be updated (written to) by GPL.

Analog/binary input points that are mapped in directly that do not support COS will never report a change of state condition.

They will report the current value when read, but no alarm notification will occur. A read will only occur if a focus window is

open or a feature requires the current value.

Page 10 March 2016XMT-UM-01655-EN-08

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