Manual

1
1 INTRODUCTION
The YSI 9300 and 9500 direct-read photometers are designed to give long and
trouble-free operation. To ensure the best results, please read this manual
carefully and follow the procedures recommended. This manual covers both
the 9300 and 9500 photometers. Therefore, some of the information only
pertains to the 9500 as is noted in the appropriate sections.
The Photometers feature digital electronics and built-in filters. It is lightweight
and portable for field or laboratory use. The instruments are rugged, durable
and IP-67 rated. Additionally, the photometers are direct-reading, have
automatic blank setting, automatic wavelength selection, and automatic power
cut-off.
The following pages describe the use of the photometers, and give
instructions for the wide range of water tests which can be performed using
these instruments.
Keep the photometer clean and in good working order by adhering to the
following recommendations:
 Do not pour out samples or prepare the tests directly over the instrument.
 Always cap the test tubes before inserting into the instrument for readings.
 Wipe test tubes with a clean tissue to remove drips or condensation before
placing in the photometer.
 Do not leave tubes standing in the photometer test chamber. Remove the
tubes immediately after each test.
 Immediately wipe up any drips or spills on the instrument or in the test
chamber with a clean tissue.
 Keep the instrument clean. Clean the test chamber regularly using a
moistened tissue or cotton ball.
 Keep the instrument away from all chemicals and cleaning materials.
 Keep the instrument in a clean, dry place when it is not in use. Keep it on a
clean, dry bench away from chemicals, place it in a storage cupboard or
keep it in a carrying case.
 Keep the carrying case in a clean, dry condition. Make sure that the carrying
case is dry before the case is closed up and the instrument is put away.