Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 171)

<3. Basic Operation and Startup>
3-20
IM 11B08A01-01E
IMPORTANT
Since a pressure of higher than 1 MPa may damage GC8000, follow the procedure below when
supplying gas from a cylinder:
(1) Shut the regulator of the cylinder.
(2) Confi rm that the secondary pressure of the regulator is zero.
(3) Open the main valve of the cylinder gradually.
(4) Set the secondary pressure of the regulator to 700 kPa.
(5) For hydrogen gas, set the secondary pressure of the regulator to 500 kPa. The
explosionproof standard requires the supply pressure of hydrogen gas to be 500 kPa.
3.2.2 Power supply
Follow the procedure below when supplying the power.
 FM-X, ATEX, TIIS
<Power on>
(1) Power is supplied to the protection system (fl ameproof enclosure).
(2) Protective gas (air) is supplied to the protective gas (Purging air) inlet.
(3) When the internal pressure in the electronics section, which is both the control unit and oven
unit, exceeds 392 ±20 (Pa), purging to the electronics section begins.
(4) After 21 ±3 minutes purging, power is applied to the electronics section both of the control
unit and oven unit. On the other hand, it does not be applied to the heater and detector in
the oven yet.
(5) When the internal pressure in the oven unit exceeds 392 ±20 (Pa), purging to the oven unit
begins.
(6) After the purging time as follows, power is applied to the heater and detector in the oven.
The purging time depends on the fl ameproof certifi cations.
TIIS, FM: 9 ±2.5 minutes
ATEX: 11 ±3 minutes
 FM-Y
<Power on>
(1) Protective gas (air) is supplied to the protective gas (Purging air) inlet.
(2) The pressure value is checked if it is indicated the specifi ed one at the pressure gauge.
(3) Power is supplied to the electronics section of the control unit.
(4) When the internal pressure in the electronics section, which is both the control unit and oven
unit, exceeds 392 ±20 (Pa), purging to the electronics section begins.
(5) After 21 ±3 minutes purging, power is applied to the electronics section both of the control
unit and oven unit. On the other hand, it does not be applied to the heater and detector in
the oven yet.
(6) When the internal pressure in the oven unit exceeds 392 ±20 (Pa), purging to the oven unit
begins.
(7) After 9 ±2.5 minutes the purging, power is applied to the heater and detector in the oven.
2nd Edition : May 11, 2012-00