Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G User Manual

Page 43

IM 11M12D01-01E

2-24

< Pressure setting for the auxiliary ejector for high-temperature use >
Pressure supply for the auxiliary ejector should be set so that the suction flow of the
measured gas becomes approximately 5 l/min.

To set this, proceed as follows:

(1) In Graph 4, draw a horizontal line from the 5 l/min point. on the vertical axis

(Suction flow: Qg) toward the gas pressure line to be used, to find the point of
intersection.
Draw a line vertically down from the point of intersection to the axis to find the
drive pressure, P (at the ejector entrance).

(2) In Graph 1, determine Po (pressure setting) from L (the distance between the ejector

and the pressure gauge).

(3) Open the needle valve to supply air for the ejector to the pressure gauge until it

indicates the pressure setting, Po.

Note

Qg (the suction flow) may require change according to the conditions of use. Refer to
Section 3.2.2 and Section 4.1.4 for details.

Graph explanation
1) Graph 1 is to compensate for pressure loss in piping between the ejector and the

pressure gauge, and find Po (pressure setting).

2) Graph 2 shows correlation between P (drive pressure) and Qa (air consumption).
3) Graph 3 shows correlation between P (drive pressure) and Pg (suction pressure; when

the measured gas inlet of the ejector is closed).

4) Graph 4 shows correlation between P (drive pressure) and Qg (suction flow) for each

gas pressure.

2.6.4

Stop Valve (Part No. L9852CB or G7016XH)

This valve is mounted on the calibration gas line in the system using flow setting unit
for manual calibration.

Standard Specifications
Connection: Rc 1/4 or 1/4 FNPT

Material: SUS 316 (JIS)

Weight: Approx. 80 g

Joint: RC 1/4, Material: SUS 316 (JIS)

Joint: 1/4 NPT, Material: SUS316 (JIS)

T2.9E.EPS

Description

Part No.

L9852CB

G7016XH

F15.EPS

(Full open length)

Rc1/4 or 1/4NPT