CNGmass DCI
Technical data
Hauser
79
11.1.5
Power supply
Electrical connections
Supply voltage
85 to 260 V AC, 45 to 65 Hz
20 to 55 V AC, 45 to 65 Hz
16 to 62 V DC
Cable entries
Power supply and signal cables (inputs/outputs):
• Cable entry M20 × 1.5 (8 to 12 mm / 0.31 to 0.47")
• Threads for cable entries, ½" NPT, G ½"
Connecting cable for remote version:
• Cable entry M20 × 1.5 (8 to 12 mm / 0.31 to 0.47")
• Threads for cable entries, ½" NPT, G ½"
Cable specifications
Remote version
Power consumption
AC: < 15 VA (including sensor)
DC: < 15 W (including sensor)
Switch-on current
• max. 13.5 A (< 50 ms) at 24 V DC
• max. 3 A (< 5 ms) at 260 V AC
Power supply failure
Lasting min. 1 power cycle:
• EEPROM or HistoROM T-DAT saves measuring system data if power supply fails.
• HistoROM/S-DAT: exchangeable data storage chip which stores the data of the sensor (nominal
diameter, serial number, calibration factor, zero point etc.)
Potential equalization
No measures necessary.
For explosion-protected equipment
→
separate Ex-documentation supplied
11.1.6
Performance characteristics
Reference operating
conditions
Error limits following ISO/DIS 11631:
• 15 to 45 °C (59 to 113 °F)
• 2 to 6 bar (30 to 87 psi)
• Calibration systems as per national norms
• Zero point calibrated under operating conditions
• Field density calibrated (or special density calibration)
Maximum measured error
Mass flow
±0.50 % of the quantity filled in typical CNG fueling
Repeatability
Mass flow
±0.25 % of the quantity filled in typical CNG fueling
Influence of medium
temperature
When there is a difference between the temperature for zero point adjustment and the process
temperature, the typical measured error is ±0.0003% of the full scale value / °C.
Influence of medium pressure
The following section shows the effect on accuracy of mass flow due to a difference between
calibration pressure and process pressure is negligible.