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Summary of Contents for RMG TERZ 94
- Page 1 Electronic Turbine Meter TERZ 94 OPERATING INSTRUCTIONS Reliable Measurement of Gas STATUS: 2017 November, 20 Version:...
- Page 2 Original Document The manual TERZ94_manual_en_09a from 2017 November, 20 for the electronic gas meter TERZ 94 is the document translated first from the German original version. Anyhow, this document may serve as reference for translations into other languages. Please use in case of any uncertainties the German version as main reference.
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Page 3: Table Of Contents
Initializing the totalizing unit ................19 OPERATION ..................20 Display ........................20 Programming ......................22 Principle of programming ................... 24 Display values ......................24 Parameters and Modes of the TERZ 94 / 94-S ........... 25 ........................................... Manual TERZ 94 · EN09a · 2017-11... - Page 4 CONTENTS ........................................... 1. Meter factor (pulse value) TERZ 94 / 94-S ............. 25 2. LF pulse scaler ....................... 26 3. Configuration ......................27 4. Pulse comparator ....................29 5. Flow rate at 4 mA ....................29 6. Flow rate at 20 mA ....................29 7.
- Page 5 CONTENTS ........................................... TERZ 94 Button Assignments ................48 Converting the TERZ 94 into the TERZ 94-S ............49 ........................................... Manual TERZ 94 · EN09a · 2017-11...
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Page 7: 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 8: Functional Description
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 O-ring Sensor sleeve with sensor Nirosta steel O-ring 8x2.5 83FKM592 ........................................... Manual TERZ 94 · EN09a · 2017-11... -
Page 9: 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 10 ........................................... TERZ 94-S The TERZ 94-S volumeter has a current-loop connection (X2_0 with current module 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.
- Page 11 TERZ 94 2-channel Current output Channel 1 12345678 m3 With 2 channels: pulse monitoring Channel 2 10 / 10000 180 ° LF output HF output Alarm contact Option: EZD or RS485 interface ........................................... Manual TERZ 94 · EN09a · 2017-11...
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Page 12: 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 13: Instructions For The Installer
Volumeter + temperature corrector TEC 24 Volumeter + volume corrector ETC **** Volumeter + temperature corrector EVC **** Volumeter + volume corrector This device is an apparatus for areas subject to explosion hazards..........................................Manual TERZ 94 · EN09a · 2017-11... -
Page 14: Installation Or Removal
Servicing and maintenance The battery may only be changed in a non-incendive area. This device may be repaired only by RMG Messtechnik. Modifications to the product Changes or modifications made to this product by unauthorized persons may lead to incorrect malfunctions and are prohibited for safety reasons! In this case the [ATEX] approval will be no longer valid. -
Page 15: 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 Argon Methane Helium Ethane Carbon dioxide (dry) Propane... -
Page 16: Installation
⋅ mbar Therefore, the pressure loss ∆p 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 17: Seals
........................................... Seals It must be guaranteed that flange seals of RMG turbine meters do not protrude from the flange into the gas line. All seals approved as per DVGW can be used depending on the requirements for stability and reli- ability. -
Page 18: Screws
Nuts complying with ANSI B1.1 ANSI B1.1 ANSI B1.1 DIN 2510 made of material made of material made of material made of material ASTM A194 Grade 2H ASTM A320 Grade L7 42CrMo4 25CrMo4 ........................................... Manual TERZ 94 · EN09a · 2017-11... -
Page 19: Meter Head
The supply/current-loop (TERZ 94-S only) is connected to the terminals X22 on the transmitter board TERZ94trm. 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 20 As soon as input X5 terminals 3 / 4 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..........................................Manual TERZ 94 · EN09a · 2017-11...
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Page 21: Earthing
In the case of the TERZ 94-S, terminal X22 (on current module TERZ94trm which is plugged in the main card) is used as current-loop connection to supply the device and as output current (4- 20 mA). -
Page 22: Cables
Use 2-core or multicore shielded cables which are twisted together in pairs for the signal lines (LF output, HF output, current-loop 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”. -
Page 23: Cable Glands
• 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 ........................................... Manual TERZ 94 · EN09a · 2017-11... -
Page 24: Installing The Remote Totalizing Unit
X_TERZ90 Sensor If your TERZ 94 is designed for remote totalizing, you can install the totalizing unit at a distance of up to 50 m from the meter case. Usually, the cable has already been connected to the totalizing unit when the TERZ 94 is delivered. Should this not be the case, you will have to connect the connecting cable to Input-terminal X5, clamp S1+ and clamp S1- of the board. -
Page 25: Start-Up
........................................... 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 is permissible. -
Page 26: 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 27 (more than 2 seconds) will activate all segments of the display (segment test) and then the display will switch over to showing the Vm totalizer. The following text describes procedures where the button is normally pressed for a short time..........................................Manual TERZ 94 · EN09a · 2017-11...
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Page 28: 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. The programming module is to be connected to the pin connector indicated in the picture below. - Page 29 (Value identified with “L“) 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)..........................................Manual TERZ 94 · EN09a · 2017-11...
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Page 30: Principle Of Programming
However, there are many parameters which influence the formation of these measured values. 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..........................................Manual TERZ 94 · EN09a · 2017-11... -
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 conditions is calculated from the signal frequency of the sensor element in the electronic totalizing unit: ... -
Page 32: Lf Pulse Scaler
Pulse rate Maximum [mm] [pulses/m3] scaler [pulses/m3] output frequency [Hz] 100²) 1) Rounded values 2) In the case of the design with Qmax=650 m3/h, the LF decade scaler is set at 1..........................................Manual TERZ 94 · EN09a · 2017-11... -
Page 33: Configuration
1: 5 minutes 2: 10 minutes 3: 15 minutes 4: 1 hour (for test purpose only!) − Interface protocol 0: OFF 4: Modbus / Modbus ASCII, only with suitable hardware (no longer available)..........................................Manual TERZ 94 · EN09a · 2017-11... - Page 34 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 m3 0: Operating mode: No diagnostics mode is activated ........................................... Manual TERZ 94 · EN09a · 2017-11...
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Page 35: Pulse Comparator
With this parameter, you set the value of the calibration current. A constant calibration current is outputted if the current output mode parameter is set to default. The value of the calibration current must be within the following limits: Minimum value: 4 mA Maximum value: 20 mA ........................................... Manual TERZ 94 · EN09a · 2017-11... -
Page 36: Current Output Mode
The current output is adjusted in the factory through two correction factors (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..........................................Manual TERZ 94 · EN09a · 2017-11... -
Page 37: 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 approx. six years. This, however, is conditional on the device being read once a week or “woken up”... -
Page 38: 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 lubrication instructions depend on the nominal diameter and the pressure rating: Nominal dia. -
Page 39: Changing The Battery
........................................... Changing the battery For the TERZ 94 use only lithium batteries of the type SL 770/P Size C, 3.6 V produced by Sonnenschein or type LS 33600 produced by Saft. These batteries have a service life of approx. 6 years and can be ordered ready for installation from... -
Page 40: Specifications
Jumpers X_S1 / 3-5 and 4-6 Wiegand sensor, remote totalizer Line length < 30 m Jumpers: X_S1 / 3-5 and 4-6 Jumpers: X_TERZ90 / 1-2 Reed contact Jumpers X_S1 / 1-3 and 2-4 ........................................... Manual TERZ 94 · EN09a · 2017-11... -
Page 41: Sensor Input S2 (Comparative Input Or Start/Stop/Reset)
Umax: 28 V 30 V Imax: 60 mA* (total current) 400 mA External inductance External capacitance 25 µF * maximum total current of the 3 pulse outputs (LF + HF + Alarm) ........................................... Manual TERZ 94 · EN09a · 2017-11... -
Page 42: Lf Output
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) ........................................... Manual TERZ 94 · EN09a · 2017-11... -
Page 43: Vo Or Rs-485 Data Interface
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..........................................Manual TERZ 94 · EN09a · 2017-11... -
Page 44: Temperature Input (Hardware And Software Options)
770 mW 2,2 nF 110 µF Materials used for the meter case Spheroidal cast iron or steel, depending on the pressure class and the nominal diameter. Aluminium is used for the threaded-end design..........................................Manual TERZ 94 · EN09a · 2017-11... -
Page 45: Examples Of Connection
KFD2-SOT-Ex1 (24 V/DC) Alarm output LIYCY 2x0.75 mm blue Alarm Isolating amplifiers* KFD2-SOT-Ex2 (24 V/DC) Pulse outputs LIYCY 2x2x0.75 mm blue * If 2-channel isolating amplifiers are used, the two inputs must be separated! ........................................... Manual TERZ 94 · EN09a · 2017-11... -
Page 46: Main-Powered Device (Ex Design)
KFD2-SOT-Ex2 (24 V/DC) Pulse outputs LIYCY 2x2x0.75 mm blue Supply unit KFD2-STC3-Ex1 (24 V/DC) Current output LIYCY 2x0.75 mm blue * If 2-channel isolating amplifiers are used, the two inputs must be separated! ........................................... Manual TERZ 94 · EN09a · 2017-11... -
Page 47: Main-Powered Device (Non-Ex Design)
HF, LF and Alarm output: : 24 V/DC Maximum sum of the currents (HF + LF + Alarm) < 400 mA Alarm : HF pulses: LF pulses: Supply unit KFD2-CR-1.300 (or similar) ........................................... Manual TERZ 94 · EN09a · 2017-11... -
Page 48: Annex
ANNEX ........................................... Annex Overview of Parameters for the TERZ 94/94-S Parameter Setting Example (display) A01 Main totalizer (Vm) 0 to 99999999 12345678 m³ A02 Flow rate (Qm) 12.3 m³/h A03 Disturbing quantity totalizer 0 to 99999999 123 m³ A04 Start-stop totalizer... -
Page 49: Standard Parameters (Values Set In The Factory) Up To Dn 150
ANNEX ........................................... Standard Parameters (values set in the factory) up to DN 150 ........................................... Manual TERZ 94 · EN09a · 2017-11... - Page 50 ANNEX ........................................... Standard Parameters (values set in the factory) from DN 200 ........................................... Manual TERZ 94 · EN09a · 2017-11...
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Page 51: Fault And Event Display (Coordinate A09)
Number "0" means faultless operation. Fault Fault description Remedy No fault ----- wrong EEPROM version, invalid constant TERZ 94 PCB board must be exchanged Pulse fault: (sensor loss / 10:10000 Check the electrical connection of (X:Y)) the sensor. Possibly the sensor must be exchanged. -
Page 52: Reset
The program and the operating parameters are not lost by this and also the totalizer readings remain valid. A Reset is performed with the TERZ 94 by disconnecting the battery as well as a possibly existing external voltage supply. -
Page 53: Matrix Of The Terz 94 / 94-S
ANNEX ........................................... Matrix of the TERZ 94 / 94-S Terz94 Terz94 Terz94-S Terz94-S Coordinate Specification 1 Channel 2 Channel 1 Channel 2 Channel Main Totalizer Vm Flow rate (Qm) Disturbing quantity totalizer Start / Stop totalizer Resettable totalizer Meter factor... - Page 54 Button at the rear of the board 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 ........................................... Manual TERZ 94 · EN09a · 2017-11...
- Page 55 ........................................... 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 56 RMG products. RMG Messtechnik GmbH Otto-Hahn-Straße 5 35510 Butzbach, Deutschland Tel: +49 (0) 6033 897 – 0 Fax: +49 (0) 6033 897 – 130 Email: service@rmg.com Internet: www.rmg.com ........................................... Manual TERZ 94 · EN09a · 2017-11...
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