Ametek Thermox Series 2000 WDG-IVC User Manual

3-12 | Thermox Series 2000 WDG-IV / IVC / IVCM
Calibration/Aspirator Air/Z-Purge Connections
Required calibration gases and tubing
See Chapter 2 for information on calibration gases. The span gas is
the high gas; the zero gas the low gas.
The span gas must be 10 times greater than the zero gas. For example, if
the zero gas is 1% O
2
, the span gas must be 10% O
2
or higher.
O
2
Span Gas
Instrument air (20.9%) or from 1.0% to 100% O
2
.
O
2
Zero Gas
From .1 to 10% O
2
, balance N
2
Combustibles Span Gas
If using a WDG-IVC analyzer, you must also have a combustibles span
gas as follows:
• 60to80%(ppmrange)or40to60%(%range)ofthefullcombustibles
operating range in certified mixtures of CO or CO + H
2
, with an
equal amount of O
2
, balance N
2
.
For example, if using an operating range of 0 to 2000 ppm combus-
tibles, use 800 ppm CO, 800 ppm H
2
, 1 to 2% O
2
, balance N
2
. If using a
0 to 1% combustibles range, use 0.3% CO, 0.3% H
2
, 1 to 2% O
2
, balance
N
2
.
Combustibles Span Gas for 3-in-1
If using a WDG-IVCM analyzer with RTD-type combustibles detector,
you also must have a combustibles span gas as follows:
• 60to80%ofthefullcombustiblesoperatingrangeincertifiedmixtures
of CO (or CO + H
2
), 2% CH
4
, 8 to 10% O
2
, balance N
2
For example, if using an operating range of 0 to 2000 ppm combusti-
bles, use 800 ppm CO, 800 ppm H
2
, 1 to 2% CH
4
, 8 to 10% O
2
, balance
N
2
.
NOTE


Ametek Thermox Series 2000 WDG-IVC Specifications

General

Brand	Ametek
Model	Thermox Series 2000 WDG-IVC
Category	Measuring Instruments
Language	English