
CALIBRATION PROCEDURES
Model 300E Carbon Monoxide Analyzer
Instruction Manual
128
P/N 04288 REV: A
7.3. Manual Calibration with Zero/Span Valves
There are four different Zero/Span Valve Option configurations (see Section 5).
They all operate identically, differing only in the method used to supply calibration
gas to the Analyzer.
STEP ONE:
Connect the sources of Zero Air and Span Gas as shown below.
MODEL
300E
Sample
Exhaust
Pressure Span
Vent Span
IZS
VENT
Certified
CO Gas
Source of
SAMPLE Gas
VENT if input is pressurized
Option 51
MODEL
300E
Sample
Exhaust
Pressure Span
Vent Span
IZS
Source of
SAMPLE Gas
VENT
MODEL 701
Zero Air Generator
VENT
Certified
CO Gas
Source of
SAMPLE Gas
VENT if input is pressurized
Option 50
Needle Valve to
control Flow
MODEL
300E
Sample
Exhaust
Pressure Span
Vent Span
IZS
Certified
CO Gas
Source of
SAMPLE Gas
VENT if input is pressurized
Option 53
MODEL
300E
Sample
Exhaust
Pressure Span
Vent Span
IZS
MODEL 701
Zero Air Generator
Source of
SAMPLE Gas
Certified
CO Gas
Source of
SAMPLE Gas
VENT if input is pressurized
Option 52
Needle Valve to
control Flow
VENT
MODEL 700
Gas Dilution
Calibrator
MODEL 700
Gas Dilution
Calibrator
MODEL 701
Zero Air Generator
VENT
VENT
Figure 7–2: Pneumatic connections for Manual Calibration With Z/S Valves