44
7-10-2. Preparatory materials
Items
Contents
Standard gas
The standard gas with the attached test record from the authorized
organization
Density range of the
standard gas
C
3
H
8
: 250
∼
3000 ppm, CO: 2.00
∼
6.00 %, CO
2
: 10
∼
15 % N
2
balance
Recommended
density of the
standard gas
C
3
H
8
: 2000 ppm, CO : 5.00 %, CO
2
: 14 % N
2
balance
Pressure supplied
(Secondary
pressure)
2GAS : 0.5 kgf/
㎠
±0.1
4GAS : 0.5 kgf/
㎠
±0.1
5GAS : 0.7 kgf/
㎠
±0.1
Flow supplied
4
∼
5
ℓ
/min
Pressure controller
Use the device with the flow-meter, the flow adjustment valve and the
pressure gauge indicating both the first pressure and the secondary
pressure.
7-10-3. Connection method
7-10-3-1 Connection method by Standard gas Cylinder
①
Connect the standard gas cylinder to the CAL (standard gas suction nipple) in the rear of this
analyzer main frame. Be sure to close all the gas valves of the gas tank by turning them in the
[Close] direction to cut off the gas. The standard gas is only to be injected under the message
indicated at this analyzer.
②
Unwind the pressure controller counterclockwise to cut off the pressure, and open the valve of the
standard gas cylinder counterclockwise. If the first pressure falls to 10kgf/cm
2
or below, exchange
the gas cylinder with a new one.