natural gas meter

 

 

IC card Pre-paid Gas Meter can be used in calculating petro-gas, natural gas, oil-gas and other kind of gas. It is a kind of automatic gas meter equipped with electronic control device on the basis of diaphragm gas meter, which complies with the national standard GB/T6968-97 (class B) and OIML-R31.

 

This kind of gas meters enjoy the features of residual gas indication, automatic detection of valve, anti-magnetic & anti-unauthorized card attacks, leakage protection, Gas Theft-proof, and alarming of under-voltage of battery.

 

Almost all the gas companies have difficulty with collecting fees from every consumer, but the appearance of IC card Pre-paid gas meter and advanced Gas Selling Management System are convenient to numerous gas companies for reducing the cost, labor intensity and promoting the after-sale service, efficiency and management.

 

 

2.1Reference Standard:

(a)      OIML R31     -   1995

(b)      GB/T6968      -   1997

(c)      CJ/T112        -   2000

 

2.2 Operating Conditions:

 

a. Maximum Working Pressure           : 300 mbarg

b. Operating Pressure             : 20 mbarg to 30 mbarg

c. Operating Temperature                     : -20oC to 50oC

d. Relative Humidity                             : 98% at 30oC

e. Permissible error               : a. Qmin≤Q≤0.1Qmax =± 3%

                                                                        0.1Qmax≤Q≤Qmax =± 1.5%

                                  b. Repeatability: ± 0.1%

f. Turn down Ratio               : 100: 1

g. Environmental Status             : Safe Guard is provided with the meter IP-67.

h. Intrinsic Safety                 : EEX ia ⅡA T4.

 

 

a)     Reference standard is ISO7816-3 synchronous protocol.

b)     Answer-to-reset register.

c)     High security Memory Including Anti-wire Tapping.

d)     Authentication protocol.

e)     Authentication Attempts Counter.

f)      Specific Passwords for Read and Write.

g)     Passport Attempts Counters.

h)     Selectable Access Rights by Zone.

i)       ISO Compliant Packing.

j)       High Reliability.

k)     Low-Power CMOS.

l)       Low-Voltage Operation: 2.7 V to 5.5 V.D.C.

m)    On-time calculation and display of the balance amount left

n)     Automatic Control Function: Turning on/off gas supply value according to the situation of prepayment    storage and gas Consumption