ABB EL3000 Series Manual page 109

EL3000 CONTINUOUS GAS ANALYZERS
8 After the pressures have been adjusted to the respective setpoint, the
respective solenoid valve in the analyzer automatically connects the
combustion gas. The combustible gas regulation attempts to adjust the
pressure to the setpoint.
Adjust the controlled variables of the internal pressure regulators
If the analyzer is not automatically put into service with the pressure
values specified in the analyzer data sheet, the controlled variables of
the internal pressure regulators must be adjusted. If the controlled var-
iables of the internal pressure regulators deviate, the inlet pressures of
the instrument air, combustion air and combustion gas must be adjust-
ed.
9 Instrument air: use the external pressure regulator to set the controlled
variable for outlet to approx. 60 % (max. 70 %).
Controlled variable too high  reduce pressure.
Controlled variable too low  increase pressure.
(The controlled variable for inlet depends on the sample gas flow
rate.)
10 Combustion air: use the external pressure regulator to set the controlled
variable for air to approx. 55 % (max. 60 %).
Controlled variable too high  increase pressure.
Controlled variable too low  reduce pressure.
11 Combustion gas: use the external pressure regulator to set the con-
trolled variable for H2 to approx. 42 % (max. 52 %).
Controlled variable too high  increase pressure.
Controlled variable too low  reduce pressure.
| CI/EL3000-EN REV. B 109