Unigas PTZ Compact Volume Converter / Electronic Compact Volume Converter

Task :
The state volume converter UNIGAS PTZ converts the measured gas volume Vb of one gas meter at operation condition into m³ dry gas from standard condition pn = 1,01325 bar and Tn = 273,15 K.

The compressibility is considered as fixed value or acc. to the chart pressure stored in the calculator and temperature dependent.

Operating Principle :
The operation volume gas meter transmits impulses proportional to the measured flow to the processor of the UNIGAS PTZ Compact by means of a low frequency impulse converter mounted in or at the gas meter. The processor

Unigas PTZ Compact Volume Converter / Electronic Compact Volume Converter

receives the values of the operation pressure and -temperature from the sensors, which are either installed directly at the gas meter or at the piping.

Scope of delivery :
UNIGAS PTZ Compact consists of the micro-processor controlled computing device, the pressure- and the temperature sensors and an optimised 3-way test cock. The computing device can be mounted directly to the gas meter or separately and is certified for use in hazardous aereas according to (EEX ib IIC T5).

Pressure ranges :
Pabs= 0,9 bar to 6,0 bar with official calibration "national"
Pabs= 4,0 bar to 10,0 bar with official calibration "national"

Temperature ranges :

Gas temperatures -10°C to 40°C
Ambient temperature -10°C to 40°C
Storage temperatures -20°C to 50°C

Gas types :

Natural gas acc. to DVGW-worksheet G 260, technical gases.

Retrievable data :

Concerning the operation condition the UNIGAS PTZ Compact indicates the actual volume at standard condition via the LCD-display. By depression of key, the following values can be retrieved in addition:

	operation cubic meter Vb
	gas temperature in °C
	operation pressure pabs in bar
	condition indicator Z
	fault codes
	battery consumption in mAh
	operating hours
	fault register for Vn
	fault register for Vb
	compressibility factor K
	remote data transfer on request

Accuracy :
Total errors of measurement (reproducibility, hysteresis, room temperature) within ± 0.5 % from measured value.

Impulse output :
A standard m3 impulse output with pulse times of 10 ms, 30 ms, 40 ms or 100 ms is programmable. Furthermore, an actual m3-impulse output or a fault alarm output is also programmable. A data interface RS 232 is also available.

Home I Profile I Contact I Enquiry