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Calibration Procedures Model 360E Instruction Manual
7.1.2. Calibration Gas Traceability
All equipment used to produce calibration gases should be verified against standards of the National Institute for
Standards and Technology (NIST). To ensure NIST traceability, we recommend acquiring cylinders of working
gas that are certified to be traceable to NIST Standard Reference Materials (SRM). These are available from a
variety of commercial sources.
7.1.3. Data Recording Devices
A strip chart recorder, data acquisition system or digital data acquisition system should be used to record data
from the M360E’s serial or analog outputs. If analog readings are used, the response of the recording system
should be checked against a NIST traceable voltage source or meter. Data recording device should be capable
of bi-polar operation so that negative readings can be recorded. For electronic data recording, the M360E
provides an internal data acquisition system (iDAS), which is described in detail in Section 6.7.
7.2. Manual Calibration without Zero/Span Valves
This is the basic method for manually calibrating the Model 360E CO
2
Analyzer without functioning zero/span
valve options. It is identical to the method described in the GETTING STARTED (Chapter 3) of this manual and
is repeated her for you convenience.
STEP ONE
: Connect the Sources of Zero Air and Span Gas as shown below.
Source of
SAMPLE GAS
Removed during
calibration
VENT
MODEL 701
Zero Gas
Generator
Calibrated
CO
2
Gas
at span gas
concentration
VENT here if input
is pressurized
MODEL
360E
PRESSURE SPAN
IZS
PURGE LINE
SAMPLE
EXHAUST
VENT SPAN
Indicating
Soda Lime
Figure 7-1: Pneumatic Connections–Basic Configuration–Using Bottled Span Gas
138 05232 Rev B3