RMG TERZ 94 Operating Instructions Manual
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RMG TERZ 94 Operating Instructions Manual

Electronic turbine meter
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Electronic Turbine Meter
TERZ 94
Operating Instructions
RMG Meßtechnik GmbH
Status: 12/04
Otto-Hahn-Strasse 5 · 35510 Butzbach (Germany)
Serving the Gas Industry
P.O. Box 280 · 35502 Butzbach (Germany)
– WORLDWIDE
Tel: +49 6033 897-0 · Fax: + 49 6033 897-130

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Summary of Contents for RMG TERZ 94

  • Page 1 Electronic Turbine Meter TERZ 94 Operating Instructions RMG Meßtechnik GmbH Status: 12/04 Otto-Hahn-Strasse 5 · 35510 Butzbach (Germany) Serving the Gas Industry P.O. Box 280 · 35502 Butzbach (Germany) – WORLDWIDE Tel: +49 6033 897-0 · Fax: + 49 6033 897-130...

  • Page 3: Table Of Contents

    Connecting the gas flow................. 14 Initializing the totalizing unit ..............14 Operation................15 Display ....................15 Programming ..................17 Parameters and Modes of the TERZ 94 / 94-S ........21 Power Supply................. 27 Maintenance................28 Lubrication ..................... 28 Changing the battery................29 Specifications ................

  • Page 4: Introduction

    Therefore, the meter is characterized by long-term stability and low wear. The TERZ 94 / 94-S is provided with HF and LF outputs which allow the device to be used as a flow transducer for control applications and remote transmission.

  • Page 5: Functional Description

    Functional Description Functional Description Construction Part Designation Material Meter head Set screw Steel Sensor WF01 (1-channel) or WF02 (2- channels) Permanent magnet Oerstit 500 Lubricator (from DN 200) Radial ball bearing Nirosta steel Turbine wheel Delrin / aluminium Flow straightener Hostaform Operating Instructions for the TERZ 91 Electronic Turbine Meter...
  • Page 6 Functional Description O-ring Sensor sleeve with sensor Nirosta steel O-ring 8x2.5 83FKM592 Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 7: Meter Head

    Block diagram TERZ 94 In the display field of the TERZ 94 (not with the TERZ 94-S), a start-stop totalizer or a resettable totalizer can be optionally displayed. Through the free sensor input X5, either the volume metering of the start-stop totalizer is interrupted or the resettable totalizer is reset (depending on the programming of the TERZ 94).
  • Page 8 TERZ94trm) which serves as power supply and 4 to 20 mA current output at the same time. For this purpose, a power supply unit is required which is to be connected to this output. The TERZ 94-S cannot be battery- operated.
  • Page 9 Functional Description TERZ 94 2-channel Current output Channel 1 With 2 channels: 12345678 m3 pulse monitoring Channel 2 10 / 10000 180 ° LF output HF output Alarm contact Option: EZD or RS485 interface Operating Instructions for the TERZ 91 Electronic Turbine Meter...

  • Page 10: Safety Instructions

    The TERZ 94 / 94-S complies with currently applicable standards and regulations. However, failure to operate them properly may cause hazards. Persons who install or operate the TERZ 94 / 94-S volumeter in areas subject to explosion hazards, must be familiar with the currently applicable explosion protection standards and regulations.
  • Page 11 Safety Instructions Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 12: Installation

    Installation Installation Operating conditions Permissible types of gases The standard design of the TERZ 94 or TERZ 94-S can be used for all non- corrosive gases, such as Natural gas Town gas Acetylene Methane Helium Ethane Carbon dioxide (dry) Propane...

  • Page 13: Pressure Loss

    ⋅ ⋅ 5040 mbar Therefore, the pressure loss Δp with a volumeter of the type TERZ 94 is 5.5 mbar in this case. Installation The gas flow must be free of shocks and pulsations as well as free of foreign particles, dust and liquids.
  • Page 14 (2). • Connect the signal wires again to terminal X5 (make sure that the polarity is correct!) and screw on the cover again. Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 15: Electrical Connections

    HF signal PE (Screening) PE (Abschirmung) In areas subject to explosion hazards, the TERZ 94 must only be connected to certified intrinsically safe circuits. Make sure that the limiting values from the conformity certificate (see appendix) for the devices, which have to be connected, are not exceeded.
  • Page 16 * for 2-channel measurement only TERZ 94: Controlling the start-stop totalizer or resetting the resettable totalizer (depending on the programming of the electronic totalizing unit) is performed through input X5 terminals 1 and 2. Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 17 As soon as input X5 terminals 1 / 2 has been short-circuited through an external contact, interruption or resetting is performed. ⇒ For this purpose, set jumpers at the positions identified with XS 2 to the “reed contact” function. Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 18 Installation TERZ 94-S: In the case of the TERZ 94-S, terminal X22 (on current module TERZ94trm) is used as current-loop connection to supply the device and as output current (4-20 mA). The output signals can be picked up at the following terminals:...
  • Page 19 Installation connection, control input). The shielding must always be connected to earth on both sides. In the case of the TERZ 94, you must proceed as described in the chapter “Cable glands”. Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 20 • Push the cable end through the cap nut and the clamping piece and bend the shielding backwards. • Put the clamping piece back into the connecting piece. • Screw on the cap nut again. Cap nut Clamping piece O-ring Connecting piece Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 21 Installation Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 22: Installing The Remote Totalizing Unit

    TERZ 94 is delivered. Should this not be the case, you will have to connect the connecting cable to Input-terminal X5, clamp 3 (+) and clamp 4 (-) of the display board and the terminals marked “Zählwerk / Index Input“...
  • Page 23 Installation Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 24: Start-Up

    Connecting the gas flow Do not fill any downstream pipelines or station sections through the TERZ 94. This may speed up the turbine wheel and lead to excessively high flow rates with resultant damage. Short-time overload operation of 20% above the maximum flow rate Q permissible.

  • Page 25: Operation

    After the preset display wake-up time has elapsed, the main totalizer will appear again. If the display of the TERZ 94 does not show anything, the device is in energy- saving mode. In this mode, the display is switched off. However, incoming pulses are processed and the outputs are set.
  • Page 26 Extra values for the TERZ 94-S 80.38 Hz Frequency (sensor) 0 0 0 0 5 8 3 1 m3 Main totalizer An overview of parameters and the complete matrix are shown in the annex. Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 27: Programming

    Programming For programming the TERZ 94 / 94-S, there are four buttons on the rear side of the board. Alternatively, you can program the device with the programming module (available as an accessory). The programming module is to be connected to the pin connector indicated in the picture below.
  • Page 28 → → Display mode: Short-time view of the coordinate (e.g. A01) Programming mode: Go to the right by one decimal place (if the last decimal has been reached: Quit programming mode). Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 29 • Press the “P“ button to set the decimal point behind the flashing digit. With totalizers, modes and integers, no decimal point is permitted. • Press the control button if you have made an error or if you want to discontinue inputting data. Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 30 These parameters are described in the following section. Examples of display values: Flow rate Version number Year of construction Serial number Value of the current output in mA etc. Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 31: Parameters And Modes Of The Terz 94 / 94-S

    Operation Parameters and Modes of the TERZ 94 / 94-S In the following text, the individual parameters are described in detail. 1. Meter factor (pulse value) TERZ 94 / 94-S With the meter factor (pulse value), the relevant flow rate at measurement...
  • Page 32 Operation ⋅ ⋅ 2362 2326 3600 3600 Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 33 Pulse rate Maximum scaler scaler output frequency [mm] [pulses/m [pulses/m [Hz] Rounded values In the case of the design with Q =650 m /h, the LF decade scaler is set at Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 34 4: 1 hour (for test purpose only!) − Interface protocol 0: OFF 1: EZD protocol 0x00 / Standard Vo protocol (NAMUR) 2: EZD protocol 0x7f / Vo protocol for external devices (NAMUR) Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 35 Operation 3: Test protocol Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 36 1: Display of 1 digit after decimal point 0: Interface protocol off 1: Display cut-off time: 5 minutes 1: LF pulse width: 250 ms 0: Display in m 0: Operating mode: No diagnostics mode is activated Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 37 4 mA Maximum value: 20 mA 8. Current output mode Here you define the measured or default value which is to be outputted. 0: Default value (see above) 1: Flow rate Qm Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 38 Operation All other values are not permitted! Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 39 (offset and rise). In the event that a recalibration should really be necessary, there is a PC- based program available which will define the new offset and rise values for you. Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 40: Power Supply

    Depending on the type of the device, there are different options of power supply. 1. The basic TERZ 94 model is supplied by an internal lithium battery which enables to operate the device continuously for a period of six years. This, however, is conditional on the device being read once a week or “woken...

  • Page 41: Maintenance

    Maintenance Lubrication The TERZ 94 is fitted with permanently lubricated bearings up to and including the nominal diameter of DN 150. From the nominal diameter of DN 200, the meter is fitted with a lubricator. The type of lubricator and the...

  • Page 42: Changing The Battery

    86.90.614.00 • If you use other batteries than the replacement batteries from RMG, you run the risk of the TERZ 94 not being approved for areas subject to explosion hazards any more. • In areas subject to explosion hazards, you must never insert or remove the battery.

  • Page 43: Specifications

    (For Ex connected loads, see approval certificate) Terminals: X5,1 (+) X5,2 (-) Sensor type: Wiegand sensor, direct Line length < 50 cm Jumpers X_S1 / 3-5 and 4-6 Wiegand sensor, remote totalizer Line length < 30 m Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 44 Specifications Jumpers: X_S1 / 3-5 and 4-6 Jumpers: X_TERZ90 / 1-2 Reed contact Jumpers X_S1 / 1-3 and 2-4 Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 45 4.0 V 28 V 30 V 60 mA* (total current) 400 mA External inductance External capacitance 25 µF * maximum total current of the 3 pulse outputs (LF + HF + Alarm) Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 46 4.0 V 28 V 30 V 60 mA* (total current) 400 mA External inductance External capacitance 25 µF * maximum total current of the 3 pulse outputs (LF + HF + Alarm) Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 47 External capacitance: 23,7 µF External inductance: Ex separating unit: 17-21S1-S111 / EExi (Bartec) NOTE: If the EZD protocol or the RS485 bus is used, the device is supplied via the data interface. Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 48: Materials Used For The Meter Case

    Accuracy, current output: Better than 1% of the final value Data for the use in hazardous areas: 28 V 110 mA 770 mW 2,2 nF 110 µF Materials used for the meter case Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 49 Specifications Spheroidal cast iron or steel, depending on the pressure class and the nominal diameter. Aluminium is used for the threaded-end design. Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 50: Examples Of Connection

    LIYCY 2x2x0.75 mm blue connector pin assignment: * If 2-channel isolating amplifiers are used, the two inputs must be separated! HF + (6) HF - (3) LF + (4) LF - (1) PE (screen) Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 51 Specifications Main-powered device (Ex design) (Connection only via the current module with built in backup battery) Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 52 LIYCY 2x0.75 mm blue connector pin assignment: * If 2-channel isolating amplifiers are used, the two inputs must be separated! HF + (6) HF - (3) LF + (4) LF - (1) PE (screen) Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 53 Specifications Main-powered device (Non-Ex design) (Connection only via the current module with built in backup battery) Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 54 KFD2-CR-1.300 is applicable. 4-20 mA - (2) If the current output is not used, HF + a direct connection to 24 V/DC HF - is possible. LF + LF - PE (screen) Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 55: Annex

    1 – Flow rate Qm Correction factor - Offset 0 to 99999999 1234.5678 Correction factor - Rise 0 to 99999999 1234.5678 Damping display / current 0 to 0.9 output Frequency display 651 Hz Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 56: Standard Parameters (Factory Setting)

    Annex Standard Parameters (values set in the factory) up to DN 150 Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 57 Annex Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 58 Annex Standard Parameters (values set in the factory) from DN 200 Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 59 Annex Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 60: Fault And Event Display

    Annex Fault and Event Display (coordinate A09) In the TERZ 94/94-S there are 16 error messages. The error numbers are indicated in a roll mode, if more than one error is active, the display changes each second to the next active error (1... 5... 1...

  • Page 61: Matrix Of The Terz 94 / 94-S

    Available in service mode In case only a part of the matrix is displayed. It any depends on the operating mode, which fields are displayed. Fields, which have no function in the selected operating Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 62 Annex mode are blanked out. Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 63: Terz 94 Button Assignments

    Scrolling in the matrix (upwards) Scrolling in the matrix (downwards) > 2 sec.: switch to the programming mode < 2 sec.: switch to the coordinate Button at the rear of the board Operating Instructions for the TERZ 94 Electronic Turbine Meter...
  • Page 64 Terz 94 Programming Mode 12345678 m3 Abortion of programming Flashing digit +1 Flashing digit -1 Set decimal point / reset (if float) Move to the next digit Button at the rear of the board Operating Instructions for the TERZ 94 Electronic Turbine Meter...

  • Page 65: Converting The Terz 94 Into The Terz 94-S

    Annex Converting the TERZ 94 into the TERZ 94-S The TERZ 94 can be converted into a TERZ 94-S by installing another board. • Remove the battery (see chapter “Changing the battery”). • Remove the jumper for battery-powered mode (1-2) on the socket X2_0 of the board.

  • Page 66: Cable Type Abbreviations

    Sheath colour Conductor cross section / mm Number of cores Sheath material → Thermoplastic resins Special features → Screen braiding Insulation material → Thermoplastic resins Cable designation → Stranded core Operating Instructions for the TERZ 94 Electronic Turbine Meter...

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