http://www.rmg.com/uploads/myth_download/trz03te_prospekt_gb

Electronic Turbine Meter

TRZ 03-TE PTB-approved 7.211 02.13

RMG Meßtechnik GmbH P.O.Box 280 · D-35502 Butzbach (Germany) Phone: +49 (0)6033 897-0 · Fax: +49 (0)6033 897-130 E-mail: messtechnik@rmg.de · Web site: http://www.rmg.de

Publication No. 3.163-E

Serving the Gas Industry - WORLDWIDE

1. Function

2. Construction

The electronic turbine meter TRZ 03-TE is a flow meter which directly measures the flow rate of gases at measurement conditions. The flow rate measured and the volume are displayed on an electronic totalizer.

The operating principle of the meter is based on velocity measurement using a turbine wheel. The gas flow passes the ring-shaped inlet section of the flow straightener and reaches the coaxially mounted turbine wheel, whose speed is proportional to the mean velocity of the gas flow within the scope of the measuring range.

The speed of the turbine wheel is recorded inductively using non-contact measurement by a pulse-wire sensor and a permanent magnet. Due to the fact that the signal frequency is directly picked up at the turbine wheel, the meter is also suitable for control applications.

The electronic turbine meter TRZ 03-TE is based on the well proved long pattern meter TRZ 03. Instead of a mechanical meter index head an electronical index head is used only. The measuring characteristics remain the same as with the meter TRZ 03. Each meter consists of four structural units (see drawing).

An aerodynamic flow straightener fitted into the meter case forms a ring-shaped cross-sectional area substantially eliminating turbulences. This increases the velocity of the flowing gas. The shaft mounted with ball-bearings carries the turbine wheel on the one side and a permanent magnet rotating before the sensor on the other. The duct of the sensor sleeve towards the unpressurized section of the index head is sealed off by a pressure-tight O-ring. By means of the clamping screw the index head can be fixed in the most favourable position for taking readings.

Turbine meter Type TRZ 03-TE Totalizer Volume

00064419 F 1.4 p max Qmax Qmin

m³

Totalizer

m³/hr

Flow rate bar DN m³/h No. m³/h Yr. Further data: press button

O-ring MESSTECHNIK GMBH 35510 Butzbach

Clamping screw

Flow straightener Sensor sleeve

Thermowell (optional)

Sensor

Permanent magnet

Turbine wheel pr - connection

Oil pump

3. Types of gases

4. Approvals

The TRZ 03-TE standard design is suitable for all gases complying with the DVGW Code of Practice G260. The materials used are appropriate for gases and fuel gases, such as natural gas, refinery gas, liquid gases and their mixtures, nitrogen, CO2 (dry), air and all inert gases.

For aggressive and chemical gases, there are special designs available with PTFE lining, special material, special lubrication, etc.

PTB approval No. 7.211/02.13 II2 G EEx ib[ia] II C T3/T4 as per certificate of conformity No.: TÜV 02 ATEX 1970 DVGW product ident No. CE-0085BN0291 The TRZ 03-TE turbine meter meets the OIML guideline IR-32/89, Annex B.

· For custody transfer applications (PTB approved)

· Meter head - Protection class: IP 65 - Universally readable - Easily replaceable on site.

· Electronic totalizers (Main totalizer, additionally start-stop or resettable totalizer)

· Measuring range: up to 1:30 With high-pressure testing, an expansion up to 1:50 is possible.

· Battery mode (standard) Service life of the battery is a minimum of 6 years

· Flow display

5. Characteristics

· 2 sensor inputs with mutual monitoring · 4-20 mA current output (only with the version with a current board)

· Disturbing quantity totalizer · Compact construction with a rotatable counter head · Option for use as a remote totalizer

· Alarm output

· Long service life

· Low-torque metering system with long-term stability (apart from the turbine wheel, there are no mechanically actuated parts)

· pr connection To connect the pressure transmitter of a PTZ corrector.

· LF and HF pulse outputs (The pulse value of the LF pulse output is userprogrammable) · Intrinsically safe circuit, approved for zone 1

· Thermowell inside the meter case (option) To accommodate a resistance thermometer. · Inspection report In compliance with EN 10204/3.1B, for strength and leak testing.

6. Accuracy Error limits: ±1.0% for Qmin to 0.2 Qmax ±0.5% for 0.2 Qmax to Qmax These limits (half calibration error limit) apply in the event of a steady, swirl-free flow.

+

2

+

1

%

0

-

1

-

2

Reproducibility: ±0.1% All gas meters are tested in the factory with air under atmospheric pressure.

10

50

100

Volumetric flow rate in % Natural gas under high pressure

Air under atmospheric pressure

7. Outputs HF pulse output (high frequency) direct signal frequency

LF pulse output (low frequency) decade-scaled

4-20 mA current output Version with a current board (option)

Transistor, open collector

Transistor, open collector

Current loop connection (4-20 mA, 2-wire technology)

Umax = 28 V (Ex) 30 V (non Ex)

Umax = 28 V (Ex) 30 V (non Ex)

Umax = 28 V

Umin = 4.0 V

Umin = 4.0 V

Umin = 12 V

Imax = 30 mA

Imax = 30 mA

Imax = 23 mA

Tpulse = 1 ms

Tpulse = 125 or 250 ms

Imin = 3.5 mA

fmax = 250 Hz

fmax = 4 Hz

Error less than 1% of the final value.

External power supply unit required.

Electronic Turbine Meter

TRZ 03-TE Measuring ranges, dimensions, weights DN mm in.

Measuring range (m3/h) Qmin Qmax 1:20 1:30

10

16

Approx. weight (kg) Pressure rating PN 25 40 64 100 150

Dimensions mm ANSI 300

600

H

C

L

80 3"

G 100 G 160 G 250

161) 13 20

-

160 250 400

20

20

25

25

34

34

20

25

36

230

96

240

100 4"

G 160 G 250 G 400

13 20 32

20

250 400 650

25

25

32

32

45

45

30

35

55

270 120

300

150 6"

G 400 G 650 G 1000

32 50 80

32 50

650 1000 1600

50

50

60

60

70

90

50

65

100

285 180

450

200 8"

G 1000 G 1600

80 130

50 80

1600 2500

75

75

95

95

150

160 100

120

160

320 240

600

250 10"

G 1000 G 1600 G 2500

80 130 200

80 130

1600 2500 4000

100

110 135

150

180

225

110

160

260

330 300

750

300 12"

G 2500 G 4000

200 320

130 200

4000 6500

138 150 225

265

275

290 155

230

310

360 360

900

400 16"

G 4000 G 6500

320 500

200 320

6500 10000

280 290 350

440

525

580 350

460

575

400 480 1200

500 20"

G 6500 G 10000

500 800

320 500

10000 16000

560 610 640

700

830 1060 620

650 1075

450 600 1500

600 24"

G 10000 G 16000

800 1300

500 800

16000 25000

900 940 980 1075 1230 1570 950 1000 1600

500 720 1800

C

Measuring range 1:10

DN

From DN 80 to DN 300, the turbine meters with a pressure rating of PN 10/16 can be fitted with a thermowell to accommodate a temperature sensor.

H

1)

Size

L

RMG Meßtechnik GmbH P.O.Box 280 · D-35502 Butzbach (Germany) Phone: +49 (0)6033 897-0 · Fax: +49 (0)6033 897-130 E-mail: messtechnik@rmg.de · Web site: http://www.rmg.de

Publication No. 3.163-E

Issue: 03/2007 · Subject to technical modification without notice