EW773 Series
Ultrasonic Hydronic Meters
FOR HEATING AND COOLING APPLICATIONS
PRODUCT DATA
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0102 |
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07 -PTB017 |
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M |
-MI004 |
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-06 |
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Pt500 |
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DE |
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temp |
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Hydrometer |
low |
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heatmeter.place: 2007 |
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Tsensor:180°C |
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Inst .year:6446 |
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..... 177K |
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EW7730K1200O: ..... |
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Prod 3400 |
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3/h |
∆O: |
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E1 |
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5N: |
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3 |
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.class: |
M1 |
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.015m /h |
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2 |
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qi:0 |
.5m |
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Environm |
class: |
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1 3 |
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qp: |
/h °C |
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class: |
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3m 130 |
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qs: 5.....IP54 |
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Mechanical |
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O: 15 |
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Metrological |
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DN: 16 |
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PN: 773 0 |
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Typ: |
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7730000 |
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Design |
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Hydronic meters of the EW773 Series consist of:
•Electronic energy integrator with cable connection to the ultrasonic volume measuring component, supply and return temperature probe
•Ultrasonic volume measuring component with external threads according to ISO228 (DN15...DN25) or flanges (DN25…DN80)
Materials
•Housing of electronic energy integrator made of black and transparent plastic
•Housing of ultrasonic volume measuring component made of brass
Application
Static compact hydronic meter with electronic measurement based on the ultrasonic principle, consisting of electronic energy integrator, ultrasonic volume measuring component and temperature sensors.
Metering of hydronic heating and / or cooling energy in hydronic systems based on volume, supply and return temperature. EW7730 models are suitable for energy metering of heating systems.
EW7731 models are suitable for energy metering of cooling and combined cooling and heating systems.
Features
•MID approval
•First approval in Europe for ultrasonic heat meter with dynamic range of qi/qp m³/h 1:250 in class 2 (qp 1.5 / 2.5 / 6.0m³/h)
•Complete dynamic range ≥ 1:1,500
•12 years battery lifetime
•Meters up to qp 6 with patented free-beam principle and robust swirl-free flow around reflector made of stainless steel
•Meters qp10 and larger with direct beam principle
•Standard housing dimensions
•Can be used for heating (EW7730), cooling or both (EW7731)
•Available in nominal sizes from qp 0.6 up to 40m³/h
•Measuring accuracy meets the requirements of EN1434 class 2 and 3
•No calming leg required on inlet or outlet for sizes up to qp 0.6m³/h
•Power save mode
•Remote reading via M-Bus, RF, RS232 or optical interface
•Optional plug and play modules
•Individual tariff functions
•History memory for 24 months
•Extensive diagnostic displays
•Windows based HYDRO-SET parametrization software for optimum adaptation to the user's specific needs
Honeywell y Subject to change |
EN0H-2600GE25 R1209 |
EW773 SERIES ULTRASONIC HYDRONIC METERS
Specifications
Medium |
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Water, quality to VDI2035 |
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Medium temperature |
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see table below |
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Ambient temperature |
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0…55°C (32…131°F) |
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Operating pressure |
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Threaded versions: PN16 |
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Flanged versions: PN25 |
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kvs (cv)-values |
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see table below |
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Ambient class |
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EN1434 class C / A |
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Protection class |
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IP54 / IP64 (EW7731 volume measuring component only) |
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Type |
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Static heat meter to EN1434 |
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Measuring process |
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Ultrasonic volume measurement |
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Display |
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LCD, 7-digit |
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Units |
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MWh – kWh – GJ – Gcal – MBtu |
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Total values |
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9 999 999 – 999 999.9 – 99 999.99 – 9 999.999 |
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Values displayed |
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Power – Energy – Flow rate – Temperature |
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Temperature sensors |
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Pt500 with 2-wire leads |
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Sensor current |
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Pt500 peak < 2; rms < 0.012mA |
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Measuring cycle |
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Battery supply: 16s |
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Mains unit supply: 1s |
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Max. temperature difference |
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177K |
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Min. temperature difference |
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3K |
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Starting temperature difference |
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0.25K |
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Absolute temperature measuring range |
-9.9…189.9°C (14.2…373.8°F) |
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Operating voltage |
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qp0.6…6: 3.0V lithium battery |
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qp10…40: 3.6V lithium battery |
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qp |
0.6 |
1.0 |
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1.5 |
2.5 |
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3.5 |
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6.0 |
10 |
15 |
25 |
40 |
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Medium |
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EW7730: 20…130°C (68…266°F) |
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EW7730: 20…150°C (68…302°F) |
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temperature |
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EW7731: 5...105°C (41...221°F) |
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EW7731: 5...105°C (41...221°F) |
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Flow rates |
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Maximum (qs) |
m3/h |
1.2 |
2 |
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3 |
5 |
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7 |
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12 |
20 |
30 |
50 |
80 |
Nominal (qp) |
m3/h |
0.6 |
1 |
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1.5 |
2.5 |
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3.5 |
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6 |
10 |
15 |
25 |
40 |
Minimum (qi) |
l/h |
6 |
10 |
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6 |
10 |
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35 |
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24 |
401/100 |
150 |
250 |
400 |
Starting |
l/h |
1 |
2.5 |
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2.5 |
4 |
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7 |
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7 |
15 |
30 |
50 |
80 |
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kvs (cv)-value |
m3/h |
2.06 |
5.27 |
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5.48 |
7.91 |
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16.7 |
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16.8 |
32.5 |
61.2 |
94.5 |
127 |
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(2.41) |
(6.17) |
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(6.41) |
(9.25) |
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(19.5) |
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(19.7) |
(38.0) |
(71.6) |
(111) |
(149) |
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∆p at qp |
mbar |
85 |
36 |
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75 |
100 |
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44 |
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128 |
95 |
60 |
70 |
100 |
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NOTE: Medium temperature may be limited by installation position, see chapter 'Installation' on page 6.
1 when mounted in horizontal position
EN0H-2600GE25 R1209 |
2 |
Honeywell y Subject to change |
EW773 SERIES ULTRASONIC HYDRONIC METERS
Function
Integrator
The integrator contains all the necessary circuits for recording flow rate and temperature and for calculating, logging and displaying the data. The integrator housing can be mounted directly onto the volume measuring component or to the wall. The meter can be conveniently read from a single line sevendigit display with units and symbols. A pushbutton provides user friendly control of the various display loops. All failures and faults are recorded automatically and displayed on the LCD screen. To protect the reading data, all relevant data is saved in a non-volatile memory (EEPROM). This memory saves the measured values, device parameters and types of error at regular intervals
Ultrasonic volume measuring component
The ultrasonic technology of the volume measuring component permits very high measuring accuracy and can be used in the supply or return pipeline. The volume measuring component meets the requirements of EN1434 / class 2 and 3. The standard cable length between the calculator and the volume measuring component is 1.5m for meters up to qp 6 and 2.5m for meters qp 10-40 (other cable lengths optionally on request).
Supply voltage:
Standard (12 year life)
•Meters up to qp 6: lithium battery 3.0V DC
•Meters qp 10-40: lithium battery 3.6V DC Optional (please enquire):
•Meters up to qp 6: lithium battery 3.6V DC (16-year life)
•Meters up to qp 25: mains unit 230V AC or 24V AC
Temperature sensors
Pairs of Pt500 temperature sensors with 2-wire leads are used.
Interfaces
The EW773 Series is equipped as standard with a ZVEI optical interface with the M-Bus protocol as per EN1434. This interface is used, for example, for communication with the HYDROSET parametrization software. The meter has two slots for plug and play modules. One slot for a function module and one slot for a communications module.
The following communication modules are available as options:
•RF module
•M-Bus module to EN1434
•RS232 module
The RS232 module is a serial interface and permits data exchange with the heat meter. A special data cable is required for this purpose.
The RF module communicates a list of predefined data records. This can be edited by the HYDRO-SET software.
Pulse Input
Two additional pulse inputs are available. The pulse value and the unit is configurable for energy, water, gas or electrical metering by the HYDRO-SET software. Also two accounting days are available for both inputs.
Pulse Output
The meter provides levels for two optional external pulse outputs, which can be freely programmed using the HYDROSET software.
Possible pulse output values
•Energy (standard setting)
•Volume (standard setting)
•Tariff energy 1
•Tariff energy 2
•Tariff condition 1, limit switch
•Tariff condition 2, limit switch
•Energy error
•Volume error
Module Combinations
The following module combinations for data transmission are available ex works or for retrofitting in the field:
Function modules
•Pulse input module (2 inputs)
•Pulse output module (2 outputs)
•Pulse input module and pulse output module (1 input and 1 output)
•Combined pulse inand output module (2 inputs / 1 output)
Communication modules
•M-Bus
•RS232
•RF
Accessories / Software
The HYDRO-SET parametrization software based on the M- Bus is a convenient tool for handling the hydronic meter. It runs on Windows® 2000, and XP and is used for logs memories:
•setting up for operation
•reading out measured values
•printing of meter logs
•meter configuration
Event Memory
Events such as changes and faults are stored in a non-volatile memory with a capacity of up to 31 entries. The following events are recorded:
•Checksum error
•Temperature measurement error
•Ultrasonic echo time measurement errors
•Start and end of test mode
Monthly Memory
The EW773 Series has a history memory of 24 months. The following values are stored in the EEPROM on the programmed date 1…31 of the actual month:
•Date / Time
•Volume
•Energy
•Error day counter
•Maximum monthly flow rate
•Maximum monthly power
•Date of maximum monthly flow rate
•Date of maximum monthly power
•Tariff energy 1
•Tariff energy 2
•Tariff definition 1
•Tariff definition 2
•Impulse counter 1
•Impulse counter 2
Honeywell y Subject to change |
3 |
EN0H-2600GE25 R1209 |
EW773 SERIES ULTRASONIC HYDRONIC METERS
Log Memory
The log memory is used to store consumption values. The storage frequency can be selected from various storage intervals (1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 minutes or the default setting of 24 hours, see Table 1). The data saved in the log memory can be used for the following analyses:
•Reading the meter on a certain day
•Example: if the day for reasing is 01.10 (1 October), the meter reading is displayed for the period from 01.10 of the previous year to 30.09 of the current year.
•Comparison of the last consumption period with the preceding period
Table 1. Extract of possible log memory settings
Storage |
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Recor- |
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interval |
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data |
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records |
period |
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5 minutes |
Error status, overload |
440 |
36.6 hours |
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time temperature, |
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15 minutes |
440 |
110 hours |
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overload time flow rate, |
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1 hour |
440 |
18.3 days |
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forward temperature, |
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24 hours |
440 |
440 days |
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return temperature, |
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date and time, |
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energy, |
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tariff energy 1, |
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tariff energy 2, |
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tariff definition 1, |
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tariff definition 2, |
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volume, |
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error day counter |
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Maximum Values
The integrator creates max. values for power and flow rate based on consumption time, which are stored in the EEPROM. The integration intervals are adjustable to 6, 15, 30 or 60 minutes. Default setting is 60 minutes.
Tariff Function
The integrator offers two optional tariff memories for monitoring plant load states for limit tariffs. Extensive tariff conditions make it possible to adapte the meter individually to the required customer-specific applications. Apart from the energy a timebased tariff can also be programmed.
The following limit types are possible (this example applies to the display with 3 decimal places):
Table 2. Limit types
Type |
LIMIT |
LIMIT resolution |
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∆T |
1 |
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190 °C |
1 °C |
T |
1 |
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190 °C |
1 °C |
P |
1 |
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255 kW |
1 kW |
Q |
100 |
... 25 500 l/h |
100 l/h |
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Display Control
The readings are displayed on the meter by a 7-digit LCD with units and symbols
Loop Structure
The EW773 Series display has six loops. Some display windows consist of two (to maximum seven) displays that are shown alternately at 4-second intervals.
Some pictures in the loops can be deactivated separately.
NOTE: For quick visual guidance, the loops in the display are numbered from 1 to 6.
The main loop with the current data, e.g. for energy, volume and flow rate, is programmed as default setting. In the standard setting loop No. 5 (tariff loop) is not active.
Fig. 1. Loop overview
EN0H-2600GE25 R1209 |
4 |
Honeywell y Subject to change |
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