Teledyne 6200T - Sulfides Analyzer - Manual (Page 187)

6200T Total Sulfur Analyzer Calibration Procedures
Teledyne Analytical Instruments 187
9. CALIBRATION PROCEDURES
This section describes the calibration procedures for the 6200T. All of the methods
described in this section can be initiated and controlled through the COM ports.
I MPORTANT I MPACT ON R EADINGS OR D ATA
If you are using the 6200T for US-EPA controlled monitoring, refer to
Section 10 for information on the EPA calibration protocol.
9.1. Calibration Preparations
The calibration procedures in this section assume that the analog range and units of
measure, range mode, and reporting range have already been selected for the analyzer. If
this has not been done, please do so before continuing (refer to Sections 3.4.4.1 and 5 for
instructions).
I MPORTANT I MPACT ON R EADINGS OR D ATA
It is recommended that the LAMP CAL routine (refer to Section 5.9.6) be
performed prior to all calibration operations. This will allow the
instrument to account for minor changes due to aging of the UV lamp.
9.1.1. Required Equipment, Supplies, and Expendables
Calibration of the 6200T analyzer requires a certain amount of equipment and supplies.
These include, but are not limited to, the following:
 Zero-air source
 Sulfur dioxide span gas source
 Gas lines - all gas line materials should be Teflon-type or glass.
 A recording device such as a strip-chart recorder and/or data logger
(optional).
 Traceability Standards
9.1.1.1. Zero Air (or CO
2
) Source
Zero Air:
Zero air is similar in chemical composition to the Earth’s atmosphere but scrubbed of all
components that might affect the analyzer’s readings. For SO
2
measuring devices, zero
air should be similar in composition to the sample gas but devoid of SO
2
and large
amounts of hydrocarbons, nitrogen oxide (NO) and with a water vapor dew point
≤ -15°
C.
Devices such as the TELEDYNE ANALYTICAL INSTRUMENTS Model 701 zero air
generator that condition ambient air by drying and removal of pollutants are available.
We recommend this type of device for generating zero air.
TS and Zero Air Scrubbers:
In the Model 6200T, there are two charcoal scrubbers in the analyzer chassis of the
6200T. The scrubber canister on the outside of the rear panel of the analyzer is a