This is a portable turbidity meter installation and operation manual, which introduces the function, theory, instrument features, system components, etc.
The Geotech Portable Turbidity Meter is a robust, low-cost instrument designed for field and laboratory use to measure fluid clarity. It features two light source models: the GTW with a white light source compliant with US EPA method 180.1, and the GTI with an infrared light source compliant with ISO 7027 standards. The device allows users to store data points in memory and transfer them to a computer via USB.
| Measurement Method | Nephelometric |
|---|---|
| Regulatory Compliance | EPA method 180.1 (GTW), ISO method 7027 (GTI) |
| Range | 0 to 1000 NTU (FNU) |
| Accuracy | ±2% of reading plus stray light |
| Repeatability | ±1% of reading, or 0.01 NTU (FNU), whichever is greater |
| Resolution | 0.01 NTU on lowest range |
| Stray Light | <0.02 NTU (FNU) |
| Power | 4 AA Alkaline batteries |
| Operating Temperature | 32 to 122°F (0 to 50°C) |
| Storage Conditions | -40 to 140°F (-40 to 60°C), instrument only |
| Instrument Enclosure Rating | IP67 with lid open or closed |
| Warranty | 2 year |
The instrument offers Model GTW with a white light source compliant to US EPA method 180.1, and Model GTI with an infrared light source compliant to ISO 7027 standards.
To turn the unit on, press and hold the READ button for 3 seconds. To turn it off, press and hold the ESC button for 3 seconds.
The instrument requires a sample volume of 0.473 oz. (14 ml).
The instrument comes with a 2-year warranty.