Startup; Checking Piping And Wiring Connections; Checking Valve Setup - YOKOGAWA EXAxtZR Instruction Manual

7.

Startup

7.1 Checking Piping and Wiring Connections

7.2 Checking Valve Setup

IM 11M12A01-02E
The following describes the minimum operating requirements — from supplying power
to the converter to analog output confirmation to manual calibration.
System tuning by the HART communicator, refer to IM11M12A01-51E " HART
Communication Protocol ".
Check that the piping and wiring connections have been properly completed in accor-
dance with Chapter 4, "Piping," and Chapter 5, "Wiring."
Set up valves and associated components used in the analyzer system as follows:
(1) If a stop valve is used in the detector's calibration-gas inlet, fully close this valve.
(2) If instrument air is used as the reference gas, adjust the air-set secondary pressure so
that an air pressure equals measured gas pressure plus approx. 50 kPa (or measured
gas pressure plus approx. 150 kPa when a check valve is used, maximum pressure
rating is 300 kPa) is obtained. Turn the reference-gas flow setting valve in the flow
setting unit to obtain a flow of 800 to 1000 ml/min. (Turning the valve shaft counter-
clockwise increases the rate of flow. Before turning the valve shaft, if the valve has a
lock nut, first loosen the lock nut.) After completing the valve setup, be sure to
tighten the lock nut.
Note
The calibration-gas flow setting is described later. Fully close the needle valve in the
flow setting unit.
7. Startup
7-1