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Measuring capsule heat meter G54 / G55Measuring capsule heat meter with optical interface and external modules for retrofitting. Thanks to integrated modules, the devices can be equipped with the required communication technology ex factory.
For use in the Q opto and Q basic systems or through an integrated communication module in the Q M-Bus system. Can be retrofitted with external modules for use in the systems Q M-Bus, Q walk-by and Q AMR.
As series G55 with combined heat and cold metering. Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54 The capsule meters G54 or G55 have been designed as replacement meters and are used wherever a heat meter housing (single-pipe connector) for capsule meters with a 2 inch coax thread is available. Due to their design height, the meters are general y fitted with a detachable calculator unit that can be fitted at a distance of up to 25 cm away from the volume meter.
With model G55, the combined measurement of heat and cold energy is possible. The main areas of application are in central heating systems where the heating energy is outputted individual y to different consumers.
This is meaningful in: Apartment buildings Offices and administration buildings Typical users are: Metering service companies Housing associations Property management companies Specialist companies for sanitary, heating and air-conditioning technology 2" capsule heat meter G54 or combined 2" capsule heat/cold meter G55 for indirect instal ation of the temperature sensors Fits in al 2" coax-EATs Detachable calculator unit Optical interface for external communication modules Internal communication modules for M-Bus and impulse available ex factory Mains-independent, for local use, 6 or 10-year lithium battery PTB-approved, approval no. D 22.12/05.02 Values are measured by two platinum PT 1000 resistance thermometers and one hydraulic impel er wheel sensor (2" coax) with inductive impel er wheel scanning with carbide-sapphire bearings for low-wear and reliable long-term measuring operation (the counter housing (EAT, EAS) must be provided on site).
High resolution thanks to 7-digit LC display that indicates current value, old value, check number and many service and operating parameters Additional display of 18 monthly values with date Storage of the maximum supply flow and return flow temperatures as wel as the maximum current flow with date Programming of a due date can be carried out on-site via the optical interface Add-on modules for radio or M-Bus communication as wel as impulse output and RS 232 modules can be retrofitted at any time on-site via the optical interface Thanks to integrated modules, the devices can be equipped with the required communication technology (M-Bus or impulse output) ex factory Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54 Type summary
0.6 m³/h for immersion sleeve and direct measurement - temperature sensor 5.0 x 45 mm
with 1.5 m temperature sensor cable
with 3.0 m temperature sensor cable 1.5 m³/h for immersion sleeve and direct measurement - temperature sensor 5.0 x 45 mm
with 1.5 m temperature sensor cable
with 3.0 m temperature sensor cable 2.5 m³/h for immersion sleeve and direct measurement - temperature sensor 5.0 x 45 mm
with 1.5 m temperature sensor cable
with 3.0 m temperature sensor cable G54 / G55 for external installation spots 0.6 m³/h for immersion sleeve measuring - temperature sensor 6.0 x 50 mm
with 1.5 m temperature sensor cable
with 3.0 m temperature sensor cable 1.5 m³/h for immersion sleeve measuring - temperature sensor 6.0 x 50 mm
with 1.5 m temperature sensor cable
with 3.0 m temperature sensor cable 2.5 m³/h for immersion sleeve measuring - temperature sensor 6.0 x 50 mm
with 1.5 m temperature sensor cable
with 3.0 m temperature sensor cable G54 / G55 with internal module Internal communication modules
M-BUS module
* x = any option code Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54 Further order options Volume measurement in heat pipes
Immersion sleeve and direct measurement, temperature sensor
5.0 x 45 mmImmersion sleeve measurement, temperature sensor 6.0 x 50 mm * x = any option code Further accessories Order data
Programming key for due date programming Remote display with wall bracket, inc. plug-in cable 2.5 m long Extension cable 5 m long M-Bus cable with sealable plug, 2-pole for M-Bus, 3.0 m long * Impulse cable with sealable plug, 2-pole, 3.0 m long for G54 * 4-pole, 3.0 m long for G55 * * only for devices with integrated modules The part numbers shown in the type summary must be quoted in orders. If a due date other than January 1 is required, the type description must be supplemented by the required month in the order (the due date is always the first of the month). Ordering example for a heat meter with 110 mm instal ation length and May 1 as due date: G54/0000-00, due date: May Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54 The heat meter G54 / G55 comprises a pair of precise temperature sensors and a volume meter which is instal ed in an existing single-pipe connector with 2 inch coax thread. An electronic calculator unit continual y calculates the difference in temperature between the supply and return flow and multiplies the value by the flow rate. The result of this (current heating or cooling capacity) is cumulated, displayed or forwarded to a data-processing system by radio or cable.
The heat meter G54 / G55 is a heat meter that can be extended by different internal and external modules. Internal modules are integrated into the device during production in the factory.
The G54 / G55 has two communication interfaces available. 1. The optical interface Q opto (1107) which is accessible from the outside. This al ows programming and retrofitting work on the G54 / G55 on-site at al times. The heat meter can be retrofitted for radio or other communication means. The respective modules are simply mounted on the calculator unit.
2. The internal module interface for internal impulse output or M-Bus modules. In the case of integrated modules, the information is forwarded via a permanently mounted, threaded and sealed cable connection (impulse output and M-Bus).
Measuring principle The hydraulic sensor (volume meter) is based on the multi-jet impel er wheel sensor principle.
The impel er wheel is scanned using changes in field strength in a coil depending on the impel er wheel position. There is no accumulation of magnetite, which could lead to blockage of the impel er wheel.
Determining water consumption Using the measured difference in temperature between supply and return flow, the flow rate and the calculated thermal coefficient, the heat quantity is shown on the LC display in physical units (kWh, MWh, MJ, GJ) fol owing an internal calculation process. To increase measuring accuracy, the density and enthalpy values are determined for every measurement and integrated into the calculation.
Storing the consumption values The heat consumption values are continual y cumulated. The current status is stored at the beginning of the due date. The due date can be set with the aid of a programming key; January 1 is set as the 01. standard due date (see «Ordering» section)When the annual consumption is stored, the heat meter calculates a plausibility figure. This can be read out together with the due date value and checked in the bil ing program. This al ows incorrect display readouts (e.g. "switched digits") to be detected. The stored due date value remains in place for one year.
Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54 Device states, display units and consumption values are shown via the LC display on several levels (up to 5 levels). The heat meter is equipped with a key that can be used to switch between the individual display steps and levels. The display includes the fol owing values: Current heat quantity and, Temperature difference with G55, cold quantity Current energy flow Old value heat quantity and, High-resolution heat quantity with G55, cold quantity Volume per input impulse Check number heat quantity and, with G55, cold quantity Any module instal ed Storage date and consumption values Cumulated volume for the last 18 months for quantity of heat and cold (with G55) Supply flow temperature Return flow temperature Current heat quantity Segment test – everything on Segment test – everything off Old value heat quantity (meter count on the due date) Check number heat quantity (plausibility figure reg. old value) (day the old value is formed) Current cooling quantity Optional display for combined heat/cold Old value cooling quantity (meter count on the due date) Old value cooling quantity (plausibility figure reg. old value) Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54 Supply flow temperature Return flow temperature Temperature difference Current energy flow (since factory test) Module: not instal ed (no integrated module) (primary address = 012) Optional display. Depending on the module Module: Impulse output instal ed or heat meter type, (impulse value = 1 kWh) this display appears additional y.
Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54 Latest monthly value Respective monthly value 18 monthly values Oldest monthly value Respective monthly value Optional display. Latest monthly value Depending on the module instal ed or heat meter type, this display appears Respective monthly value additional y.
Cooling quantity 18 monthly values Oldest monthly value Respective monthly value Special displays Error messages The heat meter is self-monitoring and can display errors established. These messagse alternate with the current display.
Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54

Sensor Qn 0.6 / 1.5 Loss of pr
Flow rate q in l/h
Norms and standards Directive 1995/5/EC (R&TTE Directive) Legislation concerning radio systems and telecommunications equipment (FTEG) Interference resistance Emitted interference IP protection rating IP54 according to EN 60529 Heat meter
Quality of heat medium VDI guideline 2035 Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54 General device data Installation position horizontal/vertical Metrological class Minimum flow Qmin 0.030 (0.015) m³/h 0.050 (0.025) m³/h Maximum flow Qmax Loss of pressure at Qn Nominal pressure PN Nominal diameter Connection sizes and dimensions
Installed length The heat meters G54 / G55 are delivered as replacement meters and installed in the EATs already available on site.
Temperature range
Maximum temperature (for brief periods) Calibrated temperature difference Minimum temperature difference Type of temperature sensor Cable length of temperature sensor 1.5 (opt. 3.0) m 1.5 (opt. 3.0) m Energy supply
> 6 (opt. 10) years > 6 (opt. 10) years Protection rating Length of calculator unit cable: Display levels
kWh (opt. MWh, MJ, GJ) kWh (opt. MWh, MJ, GJ) Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54 G54 / G55 with volume meter (EAT not included in the scope of supply) (*) Dimensions can vary depending on EAT variant QunDIs GmbH
Sondershäuser Landstraße 27
Bahnhofstraße 10 99974 Mühlhausen / Germany 78112 St. Georgen / Germany Tel.: +49 (0) 3601 46 83-0 Tel.: +49 (0) 7724 93 89-0 Fax: +49 (0) 3601 46 83-175 Fax: +49 (0) 7724 93 89-310 e-mail: [email protected] e-mail: [email protected] The information in this data sheet only contains general descriptions or product characteristics, which may not always apply in particular application cases and/or may be subject to change through further development of the product. Required product characteristics are then binding if they are expressly agreed when the contract is drawn up.
2010 QUNDIS GmbH. Subject to change Measuring capsule heat meter G54 / G55 DST1-QHEA-GB0 G54

Source: http://www.enersis.com.tr/files/G54_DS.pdf