Teledyne 9110T Maintenance Schedule, CAL Date Performed Action Freq Check REQ’D

Model 9110T NOx Analyzer					Instrument Maintenance
		Table 11-1: 9110T Maintenance Schedule
			CAL	DATE PERFORMED
ITEM	ACTION	FREQ	CHECK
			REQ’D
TEST	Review and	Weekly	No
functions	evaluate
Particulate	Change	Weekly	No
filter	particle filter
Zero/span	Evaluate	Weekly	No
check	offset and
	slope
Zero/span	Zero and	Every 3 months	Yes
calibration	span
	calibration
External zero	Exchange	Every 3 months	No
air scrubber	chemical
option
External	Replace	When indicator	No
dryer option	chemical	color changes
Ozone	Change	Annually	Yes
cleanser	chemical
Reaction cell	Clean	Annually or as	Yes
window		necessary
(“optical
filter” in
Figure 11-6)
DFU filters	Change	Annually	No
	particle filter
Pneumatic	Check for	Annually or	Yes if a
sub-system	leaks in gas	after repairs	leak is
	flow paths	involving	repaired
		pneumatics
Reaction cell	Replace	Annually	Yes
O-rings &
sintered
filters
PMT Sensor	Low-level	On PMT/	Yes
Hardware	hardware	preamp
Calibration	calibration	changes or if
		slope is outside
		of 1.0±0.3
Pump	Rebuild head	when RCEL	Yes
		pressure
		exceeds 10 in-
		Hg-A (at sea
		level)
Inline	Replace	Annually	No
Exhaust
Scrubber
NO2	Replace	Every 3 years	Yes
converter	converter	or if conversion
		efficiency drops
		below 96%
Desiccant	Replace	Any time PMT	n/a
bags		housing is
		opened for
		maintenance

Teledyne Analytical Instruments 240