Extech Instruments RF40 User Manual

User's Guide
Battery/Coolant Refractometer with ATC
Model RF40
Introduction
Congratulations on the purchase of your RF40 Battery/Coolant Refractometer with
automatic temperature compensation. This precision optical instrument should be
handled gently; avoid touching the optical surface. Careful use of this instrument will
provide years of reliable service.

Extech Instruments RF40 Specifications

General

Display	LCD
Humidity Range	0 to 100% RH
Resolution (Humidity)	0.1% RH
Data Logging	Yes
Temperature Range	-4 to 140°F (-20 to 60°C)
Resolution (Temperature)	0.1°C / 0.1°F
Accuracy (Temperature)	±1 °C
Accuracy (Humidity)	±3% RH
Sampling Rate	1 second
Dimensions	160 x 80 x 30 mm
Weight	200 g
Battery Type	AA

Summary

Introduction

Warranty Information

Product Specifications

Instrument Description

Operation

Zero Adjustment Procedure

Zero the refractometer by placing distilled water on the prism and aligning the boundary line with the waterline.

Taking Sample Readings

Apply sample drops to the prism, close the cover, and read the shadowline intersection on the scale.

Calibration and Repair Services