Pre-Payment Meter

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  • The name :

    Pre-payment wate meter contact-type

  • Product Description
  • Full management of the water consumption
    Easy analysis of water consumption by rich reports on PC
    Easy card usage
    Dry type or wet type water meter as option
    Available to remote by RF or GPRS
    Long time battery life
    Model name: PREPAID

  • Model : PREPAID


NWM TM Card Prepaid Water Meter is IMPELLER (turbine) water meter with dry type register (liquid protected register as Option) for residential application with sizes from Dn15 to Dn20 designed by NWM.

OPERATION of the water meter:
Water flows through the meter’s strainer and into the measuring chamber where it drives the impeller. A driving magnet transmits the movement of the impeller to a driven magnet located within the hermetically sealed register. The magnet is connected to a gear train which translates the impeller rotates into volume totalizators displayed on the register dial face.

CONSTRUCTION:
NWM TM Card Pre-paid Water Meter consists of Mechanical Water Meter, Electric Ball valve, Circuit Board (CPU), Battery and TM Card.

PRINCIPLE:
With the signal from the water meter to CPU, the CPU knows the exactly volume of the water pass through the water meter.
When insert the TM card to the water meter, the CPU know immediately the volume of the water can be used, the electric ball valve under the “open” condition.
When the volume used up, the CPU will send the instruction to the electric ball valve to close the valve.

Dimension:

Size

Dn15

Dn20

Dn25

L - Length of Water Meter

165

190 or 195

225

L1

259

294 or 299

345

D – Body Thread

G3/4B

G1B

G1-1/4B

D – Connecting Thread

R1/2

R3/4

R1

H - height

118

106

110

W - Width

114

94

94

L1: the total length with connection and the gasket without compression.

Main Technical Data:

Size

mm

Dn15

Dn20

DN25

R

Q3/Q1

80

80

80

Q4

m3/h

3,125

5

7,875

Q3

m3/h

2,5

4

6,3

Q2

l/h

50

80

126

Q1

l/h

31,25

50

78,75

Max. Reading

m3

99999,9999

Min. Reading

Liter

0.05

Pressure Loss

ΔP

ΔP<63 at Q3

Max. Pressure

MAP

MAP16

Max. Temperature

T30 or T50

 

Working Temperature: 0℃~+40℃
Power: DC3,6V (BY BATTERY)
Operating Current: <10mA
Quiescent Current: <15uA
Power-off Protect: 3V
CPU working Temperature: -10℃~+50℃
Date Protection: >10years

TM CARD     
Max. Permission Error (for T30):
From Q1 inclusive up to but excluding Q2 is ± 5%; From Q2 inclusive up to and including Q4 is ± 2%;

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Main Function:
Q1 Q2    Q3 Q4

Cryptographic Function: Automatically identify the password of the TM Card;
Prepaid Function: Pay at first;
Notification Function: the remind volume less than the setting volume, LCD show the alarm code;
Cut-off Function: the remind volume is “0”, the valve cut-off;
Power off protection Function: the power is less than 3V, the valve closed, and all the date automatically saving;
Magnetic   Protection   Function:   Valve   automatically   closed   with   outside stronger magnet interference, with magnet removing, valve open again;
Date Setting: through the TM Card can set the “overdraft”;
Easy to change the Battery.

LCD with the Function as:

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The LCD will display as turn with the information:
Total Volume: Show as “Total V” - The total volume of the water pass through the water meter;
Current Volume: Show as “Current V” – The current purchase volume; Remain Volume: Show “Remain V” – the remaining volume of the water.

If you have any questions, please send an e-mail inquiry

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