Dwyer Instruments DFMT Series Manuale utente

Series DFMT Digital Paddlewheel Flowmeter

Specifications - Installation and Operating Instructions

Bulletin F-DFMT

DWYER I STRUME TS, I C.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGA CITY, I DIA A 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

SPECIFICATIO S

Service: Compatible clean liquids.

Range: See model chart.

Wetted Materials:

Sensor and Impeller: PVDF;

Shaft: Ceramic;

O-Rings: Fluoroelastomer.

Accuracy: ±1.5% FS.

Repeatability: ±0.5% FS.

Output:

Analog: 4 to 20 mA (750 Ω max. loop resistance);

Pulse: P square wave output; Frequency: 0 to 2 kHz (adjustable);

Pulse width: 0 to 1000 ms (adjustable).

Electrical Connections: Removable screw terminal.

Temperature Limits:

Process: -4 to 194°F (-20 to 90°C);

Ambient: -4 to 149°F(-20 to 65°C).

Pressure Limit: 145 psi (1.0 MPa).

Power Requirements: 12 to 24 VDC.

Power Consumption: 2 W.

Display: 2.38 x 1.25˝ (60.33 x 31.75 mm) LCD.

Totalizing Display Maximum: 9,999,999,999.

Process Connection: See model chart.

Enclosure Rating: IP65.

Enclosure Material: ABS plastic.

Weight: 1.10 lb (0.5 kg).

The Series DFMT Digital Paddlewheel Flow Transmitter provides

instantaneous, as well as totalizing flow monitoring, making it ideal for commercial

and industrial systems. The large backlit LCD display makes navigating through

the menu structure simple. The Series DFMT uses high accuracy paddlewheel

technology, offers a user selectable 4 to 20 mA or pulse output, and has a corrosion

resistant PVDF sensor giving it long life. Users can reset the totalizer at any time

and set a security password protecting the setting from unauthorized changes.

Installation Instructions

The accuracy of these flowmeters can be affected by disturbances such as pumps,

elbows, tees, and valves that are in the flow stream. To reduce the error caused by

these disturbances, pick a section of pipe that is at a distance from any pumps,

bends or valves. The recommended distance away from elbows and pumps is

shown in Figure 1.

Mounting Location

To reduce the possibility of causing damage to the Series DFMT, it is

recommended that the meter be mounted in a full flow pipe. Vertical mounting is

acceptable, provided the liquid is flowing up through the meter, or a sufficient back

pressure exists on the downward flow. On horizontal mountings, it is recommended

that the meter be mounted perpendicular to the pipe. For systems that may have

small air pockets at the top of the pipe, the meter can be mounted up to 45° off the

vertical normal.

3-7/8˝

[100]

3-7/8˝

[100]

3-5/8

[93]

2-3/4

[68]

15xI.D. 5xI.D. 20xI.D. 5xI.D.

90°elbow

2x90°elbow

division 2

plane

15xI.D. 5xI.D.

20xI.D. 5xI.D

pump/valve

40xI.D. 5xI.D.25xI.D. 5xI.D.

2x90°elbow

flange

reducing

6˝ 152 mm

6-1/4˝ 158 mm

6-5/8˝ 168 mm

7-1/4˝ 184 mm

4-3/4˝ 121 mm

5-1/8˝ 130 mm

5-5/8˝ 142 mm

5-1/2˝ 141 mm

6-7/8˝ 175 mm

Connection

3/8˝

1/2˝

3/4˝

1˝

1-1/2˝

2˝

Figure 1: Mounting Straight Pipe Runs Required

Model

DFMT-10A

DFMT-15A

DFMT-20A

DFMT-25A

DFMT-40A

DFMT-50A

Range GPM (m3/h)

0.5 to 8 (0.1 to 2)

0.9 to 18 (0.2 to 4.09)

1.3 to 26 (0.3 to 5.91)

2.2 to 50 (0.5 to 11.36)

6.6 to 105 (1.5 to 23.85)

8.8 to 180 (2 to 40.9)

Connection

3/8˝ PT

1/2˝ PT

3/4˝ PT

1˝ PT

1-1/2˝ PT

2˝ PT

ELECTRICAL CO ECTIO S

4 to 20 mA Output

The Series DFMT can provide a variable current output that is proportional to the

detected flow rate. This output can be used in a range of external interface devices,

and can be calibrated to suit a particular flow range. The maximum load resistance is

750 Ω, including the cables used to connect.

Pulse (Frequency) Output

The Series DFMT offers a frequency pulsed output that can be configured as a linear

flow proportional frequency output or a standard pulsed output via the unit software.

The maximum pulse output frequency is 5 kHz with a pulse amplitude of 24V and a

maximum load current of 0.2A. The pulse output frequency is adjustable from 100-

5000 Hz (please refer to “To Change The Maximum Frequency” under “Pulse Output

Setup”).

When utilizing the unit with a linear proportional frequency output, the liter/pulse

option must be set to 0.0 (please refer to “To Change the Pulse/Liters” under the

“Pulse Output Setup”) and the frequency output signal scaled to the desired range

within the units capability (please refer to “To Set Qmax” under the “System Setup

Menu” to scale frequency output signal).

When utilizing the unit as a standard pulsed output (please refer to “Pulse Output

Setup” under the “System Setup Menu”).

RS485 Communication Output (Optional)

The Series DFMT features optional RS485 Communication. This must be specified at

time of order and will not function otherwise. The RS data communication option will

remain visible in the unit’s software and on the terminal board but will not be

functional. Please contact factory for RS485 communication output capable units.

USI G THE SERIES DFMT

When first turned on, the Series DFMT will initialize, and then it will turn to the

measurement reading screen.

The top number is the instantaneous flow reading, followed by the total amount of

liquid passed. The bottom bar shows the percentage of flow in relation to the

maximum flow rate.

To access the menu, press the key on the keypad. avigate through the menu

using the and to select a sub menu, and the key to enter a sub menu. To

return to the measurement reading screen, or to return from a sub menu, press the

key.

Unit Adjustment

The Series DFMT can display flow units of L/s, L/min, L/h, m3/s, m3/min, m3/h, US

gal/s, US gal/min, and US gal/h. The totalization units can be displayed in L, m3, and

US gallons.

To change flow units:

To change totalization units:

Resolution

The Series DFMT has a selectable resolution of up to 3 decimal points for both the

flow and totalization units.

To change flow resolution:

To change totalization resolution:

Steps

Operation Instructions

From the menu, select

“Basic”.

Select “PV Units”.

Use and to change

the desired flow units.

Press to select units.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“Basic”.

Select “Total Units”.

Use and to change

the desired flow units.

Press to select units.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“Basic”.

Select “PV Decimal”.

Use and to change

the desired flow resolution.

Press to select

resolution.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“Basic”.

Select “Total Decimal”.

Use and to change

the desired totalization

resolution.

Press to select

resolution.

Press to confirm the

change, or press to

cancel the change.

Display

Basic

System

Calibration

Test

PV Units

PV Decimal

Total Units

Total Decimal

PV Units

L/h

m3/h

PV Units

L/h

m3/h

Basic

System

Calibration

Test

PV Units

PV Decimal

Total Units

Total Decimal

Total Units

E T ESC

Basic

System

Calibration

Test

PV Units

PV Decimal

Total Units

Total Decimal

PV Decimal

E T ESC

Basic

System

Calibration

Test

PV Units

PV Decimal

Total Units

Total Decimal

E T ESC

Item

Label

4 to 20 mA+

4 to 20 mA-

0 to 2 kHz+

0 to 2 kHz-

RS DATA+

RS DATA-

12 to 24 V+

12 to 24 V-

Vo+

SI +

SI -

Function

4 to 20 Output

Frequency/

Pulse Output

RS485

Communication

Input Power

Terminals

Power to

Sensor (Blue)

Communication to

Sensor (Red)

Communication to

Sensor (Black)

Damping Factor

The Series DFMT has the capability to introduce a damping factor allowing the user

to delay the response time of the display and output. This function is used to

smooth out a reading of flows that has rapid spikes or dips in the flow rate.

To adjust the damping factor:

SYSTEM SETUP ME U

Password Protection

The Series DFMT has a system setup menu that is password protected. The

password must be entered each time a user accesses the system setup menu. The

unit is initially setup to have a password of 0200.

To change the password:

PERCE TAGE RA GE

The user can configure the percentage of flow display bar to show a specified range

within the products allowable range. The option “Qmax(m3/h)” in the system setup

menu allows the user to set a flow rate at which the bar will show 100%. The option

“Low Cutoff%” allows the user to set a flow rate at which the Series DFMT to display

zero, and set any outputs to zero.

To set Qmax:

To change low cutoff:

]

PULSE OUTPUT SETUP

The Series DFMT has a customizable pulse output option. The user can configure

this output’s maximum frequency, the number of liters per pulse, the pulse width,

and whether the pulse level is active low or active high.

To change the maximum frequency:

To change the liters/pulse:

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “ ew Password”.

Use , , and to

create the desired

password.

Press to select the

password.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “Signal”.

Select “Qmax(m3/h)”

Use , and to

create the desired Qmax.

Press to select the

desired value.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “Signal”.

Select “Low Cutoff%”

Use , and to

input desired cutoff %.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “Pulse Output”.

Select “Freq Max(Hz)”.

Use , and to

input desired frequency

upperlimit.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “Pulse Output”.

Select “Liter/Pulse”.

Use , and to

input desired liters per pulse

ratio.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Basic

System

Calibration

Test

Password

*2**

E T ESC

ew Password

Language

Signal

Pulse Output

ew Password

0200

ew Password

0200

0300

Basic

System

Calibration

Test

Password

*2**

ew Password

Language

Signal

Pulse Output

Qmax (m3/h)

Low Cutoff%

Qmax (m3/h) 100.0

Max: 99999999

Min: 0.000100

120.0

Qmax (m3/h)

100.0

120.0

E T ESC

Basic

System

Calibration

Test

Password

*2**

ew Password

Language

Signal

Pulse Output

Qmax (m3/h)

Low Cutoff%

1.0

Max: 9.9

Min: 0.0 1.0

Low Cutoff%

1.0

2.0

E T ESC

Basic

System

Calibration

Test

Password

*2**

ew Password

Language

Signal

Pulse Output

E T ESC

Freq Max(Hz)

4000.0

Max: 5000.0

Min: 100.0

Freq Max(Hz)

Liter/Pulse

PulseWidth(ms)

Pulse Level

5000.0

Freq Max(Hz)

4000.0

5000.0

Basic

System

Calibration

Test

Password

*2**

ew Password

Language

Signal

Pulse Output

Freq Max(Hz)

Liter/Pulse

PulseWidth(ms)

Pulse Level

Liter/Pulse

Max: _____

Min: 0.00055

0.01000

0.00000

E T ESC

Liter/Pulse

4000.0

5000.0

Steps

Operation Instructions

From the menu, select

“Basic”.

Select “Damping”.

Use , and to

change the desired flow

resolution.

Press to select

resolution.

Press to confirm the

change, or press to

cancel the change.

Display

Basic

System

Calibration

Test

PV Decimal

Total Units

Total Decimal

Damping(s)

02.0

Max: 99.9

Min: 0.1

Damping(s)

02.0

03.0

E T ESC

To change the pulse width:

PULSE LEVEL

The pulsed output on the Series DFMT can be programmed to be active high or

active low.

To change pulse level:

RS485 COMMU ICATIO S OUTPUT (OPTIO AL)

The Series DFMT also has a RS485 communications output capability. The user

can alter the protocol, baud rate, parity, stop bit, and the device address. The

RS485 output works on 8 data bits.

To set protocol:

To change baud rate:

To set parity:

To set stop bit:

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “Pulse Output”.

Select “Pulse Level”.

Use and to select

active high or active low.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “RS485 Output”.

Select “RS485 Protocol”.

Use , and to

select MODBUS.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “RS485 Output”.

Select “Baudrate”.

Use , and to

select desired baud rate.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “RS485 Output”.

Select “Parity”.

Use , and to

select parity type.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “RS485 Output”.

Select “Stop Bit”.

Use , and to

choose the stop bit.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Basic

System

Calibration

Test

Password

*2**

ew Password

Language

Signal

Pulse Output

Freq Max(Hz)

Liter/Pulse

PulseWidth(ms)

Pulse Level

E T ESC

Pulse Level

Active L

Active H

Pulse Level

Active L

Active H

Basic

System

Calibration

Test

Password

*2**

Signal

Pulse Output

RS485 Output

Total Set

RS485 Protocol

Baudrate

Data Bit

Parity

RS485 Protocol

MODBUS-RTU

MODBUS-ASC

RS485 Protocol

MODBUS-RTU

MODBUS-ASC

E T ESC

Basic

System

Calibration

Test

Password

*2**

Signal

Pulse Output

RS485 Output

Total Set

RS485 Protocol

Baudrate

Data Bit

Parity

Baudrate 9600

19200

E T ESC

Baudrate

9600

4800

Basic

System

Calibration

Test

Password

*2**

RS485 Protocol

Baudrate

Data Bit

Parity

O E

E T ESC

Parity O E

EVE

Signal

Pulse Output

RS485 Output

Total Set

EVE

Basic

System

Calibration

Test

Password

*2**

Signal

Pulse Output

RS485 Output

Total Set

Data Bit

Parity

Stop Bit

Dev Address

Stop Bit

E T ESC

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “Pulse Output”.

Select “PulseWidth(ms)”.

Use , and to

input desired pulse width.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Basic

System

Calibration

Test

Password

*2**

ew Password

Language

Signal

Pulse Output

Freq Max(Hz)

Liter/Pulse

PulseWidth(ms)

Pulse Level

Pulse Width (ms)

Max: 1000.0

Min: 0.0 0000.0

0000.0

E T ESC

Pulse Width (ms)

0000.0

0050.0

To set device address:

Clear and set totalizer

The Series DFMT has a totalizing function that is displayed on the main screen.

This value can be cleared or set to a predetermined value.

To clear totalizer:

To preset totalizer:

MAI TE A CE/REPAIR

Upon final installation of the Series DFMT, no routine maintenance is required. The

Series DFMT is not field serviceable and should be returned if repair is needed.

Field repair should not be attempted and may void warranty.

WARRA TY/RETUR

Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact

customer service to receive a Return Goods Authorization number before shipping

the product back for repair. Be sure to include a brief description of the problem

plus any additional application notes.

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “Total Set”.

Select “Clear Total”.

Use to select “Yes” or

“ o”.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “Total Set”.

Select “Clear Total”.

Use to select “Yes” or

“ o”.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Basic

System

Calibration

Test

Password

*2**

Signal

Pulse Output

RS485 Output

Total Set

Clear Total

FWD Preset(m3)

Clear Total

Yes

E T ESC

Clear Total

Yes

Basic

System

Calibration

Test

Password

*2**

Signal

Pulse Output

RS485 Output

Total Set

Clear Total

FWD Preset(m3)

500.000000

Max: ______

Min: ______

000.000000

FWD Preset(m3)

E T ESC

500.000000

Steps

Operation Instructions

From the menu, select

“System”.

Use , , and to

input current password.

Press to enter password.

Select “RS485 Output”.

Select “Dev Address”.

Use , and to

input desired device address.

Press to select value.

Press to confirm the

change, or press to

cancel the change.

Display

Basic

System

Calibration

Test

Password

*2**

Signal

Pulse Output

RS485 Output

Total Set

Data Bit

Parity

Stop Bit

Dev Address

000

101

Dev Address

000

101

E T ESC

DWYER I STRUME TS, I C.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGA CITY, I DIA A 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

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