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Chapter 7. SPECIFICATIONS
CMG Series specifications
Item
Specifications
Applicable gas
Fuel gas (13A-46MJ/m
3
), air)(*
1
), air (according to model No.),
propane (*
2
), butane (*
3
)
Material
Flow path section: aluminum alloy (Rc thread), SCS13 (flange)
Display section: PBT (GF 30%)
Allowable ambient humidity 40°C, 90%RH or less (without condensation)
Rated voltage
24Vdc, 100Vac, 200Vac
Allowable voltage
24Vdc: ±10% of rated voltage. 100Vac, 200Vac: 85% to 110%
Power consumption
24Vdc: 5.5W or less. AC model: 2W or less
Flow rate display method
Flow quantity adjusted for 0°C and 101.325kPa
(1 atmospheric pressure)
Instantaneous flow rate
repeatability
±1%RD±1 digit (20°C)
Response speed
Sampling cycle 100ms, 0
→
100% step response 1.6s
Instantaneous
flow rate
output
1 to 5Vdc
voltage
output
Output range: 0 to 400% of measurement range upper limit (scalable)
flow rate output voltage Accuracy: ±0.5%FS
output Wiring distance: within 10m
External load resistance: 10kΩ or more
4 to 20mA
current
output
Output range: 0 to 400% of measurement range upper limit (scalable)
Accuracy: ±0.5%FS
Load resistance: 300Ω 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
(4 to 20mA output model
only)
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 0.001m
3
/pulse, 0.01m
3
/pulse or 0.1m
3
/pulse
For measurement to 1 digit after the decimal point range:
Select either a 0.01m
3
/pulse, 0.1m
3
/pulse or 1m
3
/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
24Vdc power
supply
model
Between terminal 5 and flow path, and between terminal 6 and flow
path: 1500Vac for 1min or 1800Vac for 1s
ACpower
supply
model
Between terminals 1/2 and flow path: 1500Vac for 1min or 1800Vac for 1s
Between terminals 3/4 and flow path: 1500Vac for 1min or 1800Vac for 1s
