Thermco | Gas Analyzers

Gas Analyzers / Model 7000

Gas Analyzer Model: 7000

Primary Applications: Measurement of Binary Gas Mixtures Used in Welding Shield Gas, Food Packaging, Leak Detection, Heat Treating Atmospheres

Spec Sheet | C.A.D. Outline Drawing

Built-in flow controls
Rugged Thermco TC detector cell
A variety of alarm contacts and signal outputs
Panel mount style

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Specifications

Model

7000

Common Ranges

Range	Mixture Example	Application
0-50% CO₂ in Ar	25% CO₂ in Ar	GMAW shield gas
0-10% O₂ in Ar	5% O₂ in Ar	GMAW shield gas
0-50% He in Ar	25% He in Ar	GMAW shield gas
0-100% He in Ar	75% He in Ar	GMAW shield gas
0-50% H₂ in Ar	35% H₂ in Ar	GTAW shield gas
0-50% CO₂ in N₂	30% CO₂ in N₂	food packaging
0-100% O₂ in CO₂	80% O₂ in CO₂	food packaging
0-20% H₂ in N₂	10% H₂ in N₂	furance atmosphere
0-100% H₂ in N₂	75% H₂ in N₂	furance atmosphere
0-50% N₂ in Ar	20% N₂ in Ar	lamp filling
0-50% He in N₂	25% He in N₂	leak detection

Range: Many ranges are available. Some common ranges are shown above. Consult Thermco Sales Engineer for details.

Accuracy

±0.3% of minor component absolute over range of 0-10%, all ranges.
±0.5% of minor component absolute over a range of 10.1% to 30.0% all ranges.
±1.0% of minor component absolute over a range of 30.1% to 60.0% all ranges.
±2.0% of minor component absolute over a range of 60.1% to 100.0% all ranges except CO₂ in Ar, which has an accuracy of ±8.0%
Example: For a 25% CO₂ in Ar mixture, the analysis will be between 24.5% and 25.5%
This accuracy is valid over a temperature range of 50° to 90°F (10° to 32°C).

Resolution

0.1%

Response Time

95% in 45 seconds for typical gas mixtures

Maximum Drift

Zero, ±2% of full range per week; span, ±1% of full range per month. This applies to typical ranges.

Frequency of Calibration

Calibration is recommended once per year when used under typical conditions.

Ambient Temperature Limits

-10°F to 110°F (-23°C to 43°C)

Utilities Required

Reference gas: The background gas in the mixture is required to flow continuously at 0.5 SCFH. This should be a clean, dry, oil free gas. Gas pressure required is 1-150 PSIG
Sample gas: The sample gas is required to flow continuously at 1.0 SCFH. This should be a clean, dry, oil free gas. Gas pressure required is 1-150 PSIG, except gases containing H₂ are 1-50 PSIG.
Power: 104-126 VAC, 50/60 Hz. 1 ampere standard; 204-240 VAC, 50/60 Hz. optional

Output Signal

4-20 mA, proportional to gas analysis range selected. This output is isolated and self-powered with a compliance of 10 VDC.

Alarms Relays

Two independent alarm relays, form C, with a rating of 5 amperes at 120/240 VAC (resistive). Note; when the alarm package is specified these alarm relays are utilized in the alarm package circuitry.

Enclosure

General purpose indoor panel mount

Weight

44 lbs. (20 kg)

Dimensions

15.5 in (39.4 cm) height, 13.6 in (34.5 cm) width, 10.3 in (26.2 cm) depth

Additional Information

Documentation

Each gas analyzer is supplied with one instruction manual which includes wiring and instruction drawings. A data sheet is provided specifying major parts, settings, and optional items.

Warning

Improper use of this product can cause serious injury or property damage. Personnel dealing with this equipment should read and understand warning labels and instruction manuals provided by Thermco.

The Model 7000 is not intended to measure oxygen/nitrogen mixtures for breathing air, oxygen purity, or other medical applications.

The Model 7000 is not designed to be used with toxic gases or gases corrosive to brass or nylon.

Ordering Information

Thermco gas analyzers are available through many local industrial gas suppliers. Thermco gas analyzers may also be ordered directly from the factory.