10.2Periodic maintenance and inspection

Maintenance/inspection item

Referential frequency

Procedure

 

 

 

Analyzer calibration

Weekly

Refer to section 8.5 to 8.6.

 

 

 

Check of standard gas filled

 

It takes at least 1.5 months to deliver the standard gas. So

pressure

 

the gas should be ordered 2 or 3 months in advance.

 

 

 

Water level in upper chamber of

Monthly

Supply water if level is below overflow port.

conditioner

 

 

 

 

 

Replacement of membrane filter

Every two months

Replace with new filter paper (stop the aspirator when

paper

 

exchanging). See 10.5 (3).

 

 

 

Inspection and replacement of

Biannually

Replace these parts if flow rate doesn’t increase because of

conditioner filter, O-ring

 

adherence of dust. See 10.5 (2).

 

 

 

Capillary

 

Replace if clogged.

 

 

 

Check of valve and diaphagm of

 

Check and clean diaphragm. Use valve by turning it to 90°

aspirator (pump)

 

rightward (replace valve when it is turned once). See 10.5

 

 

(4).

 

 

 

Leak test of pressure regulator

 

Apply soapy water or the like and check for bubbles. Either

 

 

retighten or replace packings if necessary.

 

 

 

Replacement of standard gas

 

NO, SO2, CO/N2 of less than 250 ppm. See 10.4.

Replacement of gas extractor filter

Yearly

O-ring requires replacement. Filter element may be reusable

element, O-rings

 

after cleaning. See 10.5 (1).

 

 

 

Catalyst of NO2/NO converter

 

Replacement (when NO2 gas concentration is 10 ppm or

 

 

less)

 

 

Note: Replace once every 8 months when NO gas con-

 

 

centration is measured in the setting range of 0 to

 

 

200ppm or more at 0.5L/min.

 

 

 

Replacement of standard gas

 

See 10.4.

 

 

 

Aspirator

 

Replacement of diaphragm

 

 

 

Contamination, leak test of piping

 

Clean pipes or replace if necessary.

 

 

 

Exchange of water in conditioner

 

 

 

 

 

Overhaul

 

 

 

 

 

10.3Other maintenance and inspection

(1)Space heater and ventilating fan

If the ambient temperature drops below 5° C during winter or the like, then turn ON the space heater. The ventilating fan should always be left ON.

(2)Blowback of gas extractor (option)

Turn off the aspirator and close the measured gas line before conducting a blowback. Frequent blowback will cause the temperature of the gas sampler to drop and result in corrosion, so it should be kept to a minimum.

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Fuji Labs ZSP Periodic maintenance and inspection, Other maintenance and inspection, 200ppm or more at 0.5L/min