M-BUS type C card prepayment charge intelligent instrument consists of two parts, hand-held card reader and control module. The hand-held card reader mainly realizes card operation, reading data in the meter, writing data to the meter, water recharge and other functions; the main functions of the control module include flow totalization, valve control and data transmission with the hand-held device. The data transmission between the handheld device and the control module is carried out by wired way in accordance with the M-BUS communication protocol; it is a high-quality intelligent metering water meter with the functions of prepayment, MBus remote communication, automatic billing, alarm and preventing improper use.
Product use
It is used to measure, memorize and display the total volume of cold drinking water flowing through the tap water pipeline; it is suitable for small units and domestic water measurement.
Product characteristics
A. metering and prepayment function: double pulse sampling metering pulse is adopted, two pulse sampling points are successively sucked together as a metering signal, which is compatible with reed and hall sampling. According to the metering signal, reduce the remaining consumption of the control module until the remaining consumption is zero, and close the valve. At the same time, the cumulative volume in the control module is increased. Users must buy a certain amount of water before using it.
B. purchase and recharging: after inserting the user card with the purchased amount recharging, the water meter will add the purchased amount in the card to the original remaining amount, and display the "current input amount remaining amount" (added to the current purchase amount) "cumulative amount" and "credit amount". After recharging, the IC card can be pulled out.
C. anti accumulation function (limit of water quantity input): the maximum limit of storage quantity is set in the table. If the sum of the purchase quantity in the user card and the remaining quantity in the table exceeds the limit value, after inserting the user card that has been purchased for recharging, it will display "limit the current input quantity of XXXXXX m3", and press the key to display the original "remaining quantity" cumulative quantity of credit quantity in turn, indicating the current input If the limit is exceeded, the card will not be recharged; when the remaining amount in the table is less than xxm3, the card can still be used.
D. inquiry and write back function: when the user wants to inquire about the water meter, he can insert the user card (blank user card), which will successively display the remaining consumption, accumulated consumption and internal relevant information in the valve control parts. At the same time, the table number, remaining amount in the table, cumulative amount, current purchase amount, table operation parameters, etc. are written back to the user card. The testing department can also query the relevant information and table status of the table by querying the card.
E. low limit alarm function of remaining consumption when the remaining consumption is equal to the valve closing alarm, the valve will be closed. After inserting the user card, open the valve through the handheld device, and prompt the user to purchase the recharge.
F. when the remaining amount in the table is zero, the valve will be closed automatically. The user must purchase water from the relevant department with the user card for recharging. After recharging, the user card can open the valve through the handheld device and continue to use.
G. low voltage and battery unplugging protection function: the water meter measures the voltage once a day. When it is judged that the battery voltage is lower than 4.95v ± 05V [with certain load test], the valve will close automatically. At this time, the user can open the valve after connecting the handheld device and inserting the card. The handheld device will display "e-07 replace the external battery" to remind the user to replace the new battery. If the new battery is not replaced, the valve will be closed again 15 days later. At this time, the valve will not open after the user inserts the card. The user must replace the new battery before continuing to use.
H. antimagnetic attack function: the water meter provides automatic protection function. When there is a magnetic field approaching, the valve will be closed automatically. The card shows "e-03". Please check whether there is strong magnetic field around the water meter or is soaked by water. After treatment, the user card can be inserted to open the valve. If it cannot be recovered, the maintenance personnel can be informed to repair the water meter.
I. multi meter function of one card: after setting the water meter by setting the card, the user card can correspond to multiple sub meters with the same user number, and each sub meter can independently measure and recharge.
J. meter abnormal protection function: when the meter valve is closed in normal use, insert the user card to display "e-01" prompt, indicating that there is a fault in the meter. Please inform the maintenance personnel to repair the meter as soon as possible
K. compatible with various sampling coefficient functions: the sampling coefficient can be modified according to the situation of the base table, compatible with various sampling coefficients, but the sampling coefficient of the table must be consistent with the base table and the upper computer charge management system.
1. Valve abnormal display function when the water meter valve is abnormal, "e-05" will be displayed through the handheld device to remind the user that the valve is abnormal.
Design standard
GB / t778-2007 measurement of water flow in closed full pipe
C / t133-2012 IC card cold water meter
GB / T191 Pictorial marking for packaging, storage and transportation
C] / T166 construction industry IC card application technology
B / t9329 basic environmental conditions and test methods for transportation, transportation and storage of instruments
Gb4208-2008 enclosure protection level (P code) (ec60529:2001, IDT)
Rated working conditions
Flow range: q1-q3
Ambient temperature: 5 ° c-55 ° C
Water temperature cold water 0.1 ° c-30 ° C hot water 0.1c-90 ° C
Water pressure: 0.03mpa ~ maximum allowable pressure (map10)
Water quality: tap water, direct drinking water, miscellaneous water, domestic hot water
Ambient humidity: (0 ~ 100)% RH
Electromagnetic environment level: E1
Climate and mechanical environment class: B
Product technical parameters
|
Texture of material |
Stainless steel nodular cast iron with copper shell |
|
caliber |
DN1～DN25 |
|
Protection level |
IP65 |
|
Service temperature |
0.1℃～30℃(Cold water meter） 0.1℃～90℃（Hot water meter） |
|
Compressive strength |
1.6MPa,15min |
|
Alarm voltage |
Automatic valve closing when lower than 2.7V |
|
Quiescent current |
≤7μA |
|
Working current |
＜40mA |
|
Durability performance |
Electric valve switch＞10000次 |
|
IC card service life |
＞The 100 thousand time |
|
Induction coil |
coil 800uH，radius R＝20mm |
|
Control module chip |
ATMEL－T5577 |
|
Control module average power consumption |
<15uA |
|
Anti interference capability |
0～30mm（write）/0～40mm（read）（Grade of video card and size of antenna） |
|
working temperature |
-20℃～70℃ |
|
Ambient humidity |
5%～85% |
|
Battery matching |
lithium battery：DC3.6V |
|
Characteristics of data application environment |
The write modulation mode is pulse width modulation;
The mode of reading modulation is Manchester code; Working in the standard industrial frequency of 100-150khz (125kHz), it can send read-write commands and receive data simply with antenna; The card application level full function test (including reading and writing of data page, rewriting of configuration bit, writing password and verification password, stop card, etc.) has a reading and writing distance of 30mm. |
|
Minimum unit of measurement |
1 tons or 1 litres |
|
Maximum permissible error |
High area（Q2≤Q≤Q4)by±2% Low area（Q1≤Q＜Q2)by±5% （When the water temperature exceeds 30 ℃, the maximum allowable error of the water meter in the high zone is ± 3%） |
Flow parameters
|
Model |
caliber |
Range ratio R |
Overload discharge |
Common discharge |
Boundary flow |
Minimum flow rate |
Maximum readings m³ |
|
m³/h |
|
||||||
|
LXSCF-15 |
DN15 |
80 |
3.125 |
2.50 |
0.050 |
0.03125 |
99999 |
|
LXSCF-20 |
DN20 |
80 |
5.000 |
4.00 |
0.080 |
0.0500 |
99999 |
|
LXSCF-25 |
DN25 |
80 |
7.875 |
6.30 |
0.126 |
0.0787 |
99999 |
note：Range ratio R=80/100/125/160，For detailed technical parameters, please call。
Indication error limitThe accuracy level of this series of water meters is level 2. In the range of water temperature from 0.3 ° C to 30 ° C, the maximum allowable error of water meters is ± 2% in the high area (Q2 ≤ Q ≤ Q4) and ± 5% in the low area (Q1 ≤ Q < Q2). When the water temperature exceeds 30 ° C, the maximum allowable error of the water meter in the high zone is ± 3%.
Appearance size and weight
|
caliber |
Long L |
Board B |
Height H |
Connecting thread |
weight |
Shell and valve material |
|
|
mm |
d |
D |
kg |
||||
|
15 |
165 |
78 |
93 |
R1/2 |
G3/4B |
≈1.7 |
copper |
|
20 |
195 |
78 |
93 |
R3/4 |
G1B |
≈2.6 |
copper |
|
25 |
225 |
91 |
113 |
R1 |
G11/4B |
≈2.5 |
Aluminium alloy |
Previous: Prepaid IC card water meterLXSC-15~25E
