Teledyne 9110T - Nitrogen Oxides Analyzer - Manual (Page 239)

Model 9110T NOx Analyzer Instrument Maintenance
Teledyne Analytical Instruments 239
11. INSTRUMENT MAINTENANCE
For the most part, the 9110T analyzer is maintenance free. However it is recommended that a minimal
number of simple procedures be performed regularly to ensure that the 9110T continues to operate
accurately and reliably over its lifetime. In general, the exterior can be wiped down with a lightly damp
cloth; avoid spraying anything directly onto any part of the analyzer.
Service and troubleshooting are covered in Section Troubleshooting & Service.
11.1. MAINTENANCE SCHEDULE
Table 11-1 shows a typical maintenance schedule for the 9110T. Please note that in certain
environments (i.e. dusty, very high ambient pollutant levels) some maintenance procedures may need to
be performed more often than shown.
I
MPORTANT I MPACT ON R EADINGS OR D ATA
A span and zero calibration check (see CAL CHECK REQ’D Column of
Table 11-1, 9110T Maintenance Schedule) must be performed following
some of the maintenance procedures listed herein.
To perform a CHECK of the instrument’s Zero or Span Calibration, follow
the same steps as described in Section 9.3.
DO NOT press the ENTR button at the end of each operation. Pressing
the ENTR button resets the stored values for OFFSET and SLOPE and
alters the instrument’s Calibration.
Alternately, use the Auto Cal feature described in Section 9.5 with the
CALIBRATE attribute set to OFF.
WARNING – E
LECTRICAL
S
HOCK
H
AZARD
Disconnect power before performing any of the following operations that require
entry into the interior of the analyzer.
CAUTION – Q
UALIFIED
P
ERSONNEL
These maintenance procedures must be performed by qualified technicians only.