Series 222 ultrasonic BTU Meter（DN20-400）
The UHM represents an advanced and reliable BTU meter, renowned for its remarkable accuracy and stability. Employing ultrasonic technology, it precisely measures the energy consumption of home heating and cooling systems. This UHM series functions as an integrated meter, making it ideal for installations over extended distances.
The standard configuration features a 5 - meter cable connecting the calculator to the flow sensor. Thanks to its 8 - digit LED display, users can effortlessly read the measured values. With no moving components, the UHM series demands minimal maintenance. All these attributes render it an excellent choice for installation on chillers and boilers.
Features
● Works with both heating and cooling systems.
● High accuracy: The high quality ultrasonic transducer and advanced electronic measurement technology work together to ensure the meter's high accuracy and stability.
● No moving parts: This decreases the maintenance cost and ensures that the meter is resistant to dirty water.
● PT1000 platinum resistance.
● Low starting flow-rate: The U-shaped acoustic path widens the dynamic flow-rate measurement range and increases the accuracy of low- and high-end measurements where other, more narrow ranged, devices are inaccurate.
● Horizontal or vertical installation.
● RS485 and M-bus output ports can be used for automated meter reading.
● Automatic diagnostic function. An error code will be displayed on the screen to indicate the problem.
● Ability to install an optional 3.6 V battery that can last up to 6 years.
SPECIFICATIONS
|
Nominal diameter （DN） |
15~400mm |
|
|
Service |
Clean Water |
|
|
Storing/Ambient temperature |
+5～+55℃ |
|
|
Ambient humidity |
<93% |
|
|
Environmental class |
EN1434／CJ128 A Class |
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|
Accuracy class |
EN1434／CJ128 2 Class |
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|
Flow range |
50:1 (default) or 100:1(customize) |
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|
Enclosure protection |
IP65 |
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|
Pressure loss |
<25kPa/qp |
|
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Maximum admissible working pressure |
1.6MPa(default)/2.5Mpa(customize) |
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|
Temperature difference threshold value |
0.3K |
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Temperature range |
2～95℃ |
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|
Temperature difference range |
2～85K |
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Temperature resolution |
0.01℃ |
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Installation |
Horizontal or vertical installing is available |
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Rated voltage |
3.6VDC battery |
3.6VDC battery+24VDC |
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Network interface |
M-BUS |
RS485 |
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Communication Protocol |
EN1434, |
MODBUS RTU |
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Baud rate |
2400bps(8,E,1) |
9600bps(8,N,1) |
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Agency Approvals |
CE |
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TYPE SELECTION DN15-DN40
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Dimensions |
Flow-rate |
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mm |
m3/h |
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|
DN |
L |
D |
H |
W |
Qmax |
Qp |
Qmin |
|
15 |
110 |
G3/4B |
96 |
108 |
3 |
1.5 |
0.03 |
|
20 |
130 |
G1B |
101 |
108 |
5 |
2.5 |
0.05 |
|
25 |
160 |
G11/4B |
106 |
108 |
7 |
3.5 |
0.07 |
|
32 |
180 |
G11/2B |
113 |
108 |
12 |
6 |
0.12 |
|
40 |
200 |
G2B |
121 |
108 |
20 |
10 |
0.2 |