Thermo Scientific
48iQTL Instruction Manual
4-1
Chapter 4
Calibration
This chapter describes the procedures for performing a standard zero/span
calibration and a multipoint calibration of the 48iQTL. The information
described here is more than adequate to perform the calibration. However,
if greater detail is needed, please refer to the
Quality Assurance Handbook for
Air Pollution Measurement Systems
1
.
The following sections discuss the required apparatus and procedure for
calibrating the instrument.
The following equipment is required to calibrate the instrument:
A cylinder of CO in air containing an appropriate concentration of CO
suitable for the selected operating range of the analyzer under calibration is
necessary. For most applications, the span concentration should be about
80% of the full scale range that will be used during normal operation. For
example, if the instrument is operated at a full scale range of 50 ppm, the
span gas concentration should be about 40 ppm. The assay of the cylinder
must be traceable either to a National Institute of Standards and
Technology (NIST) CO in Air Standard Reference Material (SRM) or an
NIST/EPA approved gas manufacturer's Certified Reference Material
(CRM).
A recommended protocol for certifying CO gas cylinders against a CO,
SRM or CRM is given in the
Quality Assurance Handbook
1
. The CO gas
cylinder should be recertified on a regular basis determined by the local
quality control program.
Since the 48iQTL instrument is equipped with an internal CO scrubber, a
separate source of zero air is not required for routine single point
calibrations. However, dilution air to generate span gas from a higher
concentration cylinder requires zero air that is free of contaminants which
will cause a detectable response on the CO analyzer. The zero air should
contain <0.01 ppm CO. Since the 48iQTL is virtually interference free, it
is only necessary to ensure that CO has been removed.
Equipment Required
CO Concentration
Standard
Zero Air Generator
Содержание 48iQTL
Страница 1: ...48iQTL Instruction Manual Trace Level Carbon Monoxide Analyzer 119014 00 27Sep2018 ...
Страница 2: ......
Страница 32: ...Operation Instrument Display 3 8 48iQTL Instruction Manual Thermo Scientific ...
Страница 142: ......
Страница 153: ...Calibration Calibration Thermo Scientific 48iQTL Instruction Manual 4 11 ...
Страница 162: ...Maintenance Pump Rebuilding 5 4 48iQTL Instruction Manual Thermo Scientific Figure 5 2 Pump Rebuilding ...
Страница 180: ...Servicing Fan Replacement 7 8 48iQTL Instruction Manual Thermo Scientific Figure 7 8 Replacing the Fan ...
Страница 208: ...Servicing DMC Optical Bench 7 36 48iQTL Instruction Manual Thermo Scientific Figure 7 40 Filter Wheel ...
Страница 221: ...Servicing Heater Assembly Thermo Scientific 48iQTL Instruction Manual 7 49 Figure 7 53 Heater Assembly Removal pt 4 ...
Страница 223: ...Servicing Heater Assembly Thermo Scientific 48iQTL Instruction Manual 7 51 Figure 7 55 Heater Assembly Install pt 2 ...
Страница 230: ......
Страница 240: ......
Страница 266: ......
Страница 278: ......
Страница 279: ......