Fuji Labs ZSP Periodic maintenance and inspection, Other maintenance and inspection

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.

– 28 –