Key facts
- Brand
- EXTECH
- Model
- RF40
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
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Extech RF40 Battery/Coolant Refractometer User's Guide
This document is the User's Guide for the Extech RF40 Battery/Coolant Refractometer, a precision optical instrument designed to measure the refractive index of samples. It features automatic temperature compensation (ATC) to adjust readings based on ambient temperature variations between 50°F and 86°F (10°C to 30°C). The guide provides instructions on zero adjustment using distilled water, sample preparation, and reading the freezing point of glycol or the specific gravity of battery acid.
Read onlineEXTECH RF40 specifications
| Measurement Range (Glycol Freeze Point) | -60 to 32°F |
|---|---|
| Measurement Range (Battery Acid Specific Gravity) | 1.15 to 1.30 |
| Resolution (Glycol Freeze Point) | 2°F |
| Resolution (Battery Acid Specific Gravity) | 0.01 |
| Temperature Compensation Range | 50°F to 86°F (10°C to 30°C) |
| Dimensions | 6.2x1.6x1.2" (160x40x30mm) |
| Weight | 7.0 oz. (200g) |
Source: Extech RF40 Battery/Coolant Refractometer User's Guide
All EXTECH RF40 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How do I perform a zero adjustment on the RF40?
Place one or two drops of distilled water on the prism, close the cover plate, and rotate the adjusting screw until the light/dark boundary lines up with the 'waterline'.
From: Extech RF40 Battery/Coolant Refractometer User's Guide
How long should a sample remain on the prism before reading?
The sample should remain on the prism for approximately 30 seconds to ensure it spreads across the entire surface without air bubbles or dry spots.
From: Extech RF40 Battery/Coolant Refractometer User's Guide
Does the RF series include Automatic Temperature Compensation?
Yes, some models are available with or without Automatic Temperature Compensation.
What is included in the standard package?
The unit comes complete with a case, calibration screwdriver, and calibration solution.