Hanna Instruments HI 903 - Manual (Page 5)

5
QUICK START GUIDE
INTRODUCTION
The HI 903 Karl Fischer volumetric titrator is extremely flexible, capable of performing a
wide variety of highly accurate and precise water content titration methods.
The HI 903 finds a titration endpoint using a polarized electrode and an advanced detection
algorithm. A constant flow of current is maintained between the two platinum pins of the
titrator’s electrode. When the solution in the titration vessel contains water, a relatively
large voltage is required to maintain the flow of current between the pins. As the titration
proceeds, the water in the sample is consumed by the titrant. At the end point, all of the
water has been reacted and the cell contains excess iodine. The presence of excess iodine
within the titration cell results in a reduction in the amount of voltage required to maintain
the constant current between the pins of the electrode. The endpoint detection algorithm
incorporated in the HI 903 analyzes both the electrode response to individual additions of
titrant and the shape of the entire titration curve in order to determine the endpoint of the
titration.
Titration reports and methods can be transferred to a PC via a USB interface, saved to a USB
flash drive or printed directly from the titrator. An external monitor and keyboard can be
attached for added convenience.
How can I find certain information?
1. This Quick Start Guide will help the user learn how to operate the titrator within
a short period of time. The first analysis will be performed with the aid of the
factory stored methods.
2. The Instruction Manual provides a complete description of the operating
principles (user interface, general options, methods, titration mode, maintenance,
etc.).
3. The contextual Help screens contain detailed explanations about what kind of data
can be set or viewed in every displayed screen.
4. The Titration Theory booklet outlines the basic concepts of titration.