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