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Chapter 7. SPECIFICATIONS
■
Common specifications
Item
Specifications
Applicable gas
Natural gas *, air (according to model No.)
Material
Flow path section: aluminum alloy (NPT thread)
Display section: PBT (GF 30%)
Instantaneous flow rate display
accuracy
Measurement range
Accuracy:
±
4%RD
±
1 digit (50 to
104˚F)
±
6%RD
±
1 digit (14 to 14
0˚F)
Pressure range
Less than 14.5psi
Pressure resistance
22psi
Allowable ambient temperature,
gas temperature
14 to 140˚F (no freezing allowed)
Storage ambient temperature
-
4 to +158˚F (no freezing allowed)
Allowable ambient humidity
104˚F, 90%RH or less (no condensation allowed)
Rated voltage
24Vdc
Allowable voltage
24Vdc
±
10%
Power consumption
5.5W or less
Flow rate display method
Flow quantity adjusted for 32˚F and 1 atmospheric pressure
Instantaneous flow rate
repeatability
±
1%RD
±
1 digit (68˚F)
Response speed
Sampling cycle 100ms, 0
100% step response 1.6s
Instantaneous flow rate output
(4 to 20mAdc)
Output range: 0 to 400% of measurement range upper limit (scalable)
Accuracy:
±
0.5%FS
Load resistance: 300
max.
Event output 1
1a contact (closes at event generation)
Contact rating: 250Vac, 30Vdc, 5A (resistance load)
Mechanical life: 20 million cycles
Electrical life: 70,000 cycles
Event output 2
Output configuration: NPN open collector output
Output rated: 30V 50mA max.
When integrated pulse output is selected:
Pulse width: 100ms
±
20%
For measurement to 2 digits after the decimal point range:
Select either a 0.001 CF/pulse, 0.01 CF/pulse or 0.1 CF/pulse
For measurement to 1 digit after the decimal point range:
Select either a 0.01 CF/pulse, 0.1 CF/pulse or 1 CF/pulse
Conduit size
G 1/2, 2 pieces
Vibration resistance
5m/s
2
or less, 10 to 60Hz, for 2 hours each in X, Y and Z directions
Shock resistance
500m/s
2
or less, 3 times each in X, Y and Z directions
Voltage resistance
Between terminal 5 and flow path, and between terminal 6 and flow path:
1500Vac for 1min or 1800Vac for 1s
Insulation resistance
Between each terminal and flow path metal parts: min. 50M
(500Vdc megger)
Protection
IP54 (JIS C 0920) splash-proof and dustproof structure
Applicable standards
EN61326-1:1997 A1:1998, EN61010-1:2001
Over-voltage category
Category II
Pollution degree
Pollution degree 2
Altitude
2000m or less
*
: Natural gas composition: LNG, methane 88%,46MJ/m
3
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