Maintenance; Daily Check; Daily Check And Maintenance Procedures - Fuji Electric ZPA Instruction Manual

7. MAINTENANCE

7.1 Daily check

(1) Zero calibration and span calibration
(1) Perform zero calibration. For the calibration procedures, refer to Section 6.8.1 "Manual zero
calibration".
(2) Then, perform span calibration. For the calibration procedures, refer to Section 6.8.2 "Manual
span calibration".
(3) Zero/span calibration should be carried out once a week, or as required.
(2) Flow rate check
(1) Flow rate of sample gas and purge gas are as follows:
 Sample gas fl ow
 Purge gas fl ow
(2) Check and maintenance should be carried out every day, or as required.

7.2 Daily check and maintenance procedures

Parts to be checked
Indication value
Flow rate of sample
gas and purge gas
(Purge gas fl ow is in-
cluded when purging).
Zero point of gas
analyzer
Span point of gas
analyzer
Gas analyzer
INZ-TN2ZPA-E
: 0.5L/min ± 0.2L/min
: About 1L/min
Table 7.1 Maintenance and check table
Phenomena
Indication values are (1) Dust contamination in
too low.
Indication values are
too high. (2) Air is absorbed midway
Deviation from regu-
lated fl owing quantity
(0.3L/min to 0.7L/min).
Deviation from zero
point.
Deviation from span
point.
Regardless of any
phenomena
65
(1) Clean the sampling cell.
sampling cell.
(2) Find out cause of leak and
in the sampling piping.
Adjust by needle valve of fl ow
rater.
Zero adjustment
Span adjustment
Overhaul or service in accor-
dance with proper service plan.
Remedy
In addition, check sampling
devices, especially gas fi lter.
repair.