YSI 85 - Manual (Page 9)

Preparing the Meter Section 2
Turn the instrument on by pressing and releasing the ON/OFF button on the front of the instrument.
The liquid crystal display (LCD) should come on. Allow a few seconds for the instrument to
complete its diagnostic routine. Notice that the instrument will display the specific cell constant of
the conductivity probe during this diagnostic routine. If the instrument does not operate, consult the
section entitled Troubleshooting.
You may also want to take the instrument into a dark room and with the instrument ON, hold down
the LIGHT button. The instrument backlight should illuminate the LCD so that the display can be
easily read.
2.4 CALIBRATION/STORAGE CHAMBER
Calibration/Storage
Chamber
The Model 85 has a convenient calibration storage
chamber built into the instruments' side. This chamber
provides an ideal storage area for the probe during
transport and extended non-use. If you look into the
chamber you should notice a small round sponge in the
bottom of the chamber. Carefully put 3 to 6 drops of
clean water into the sponge. Turn the instrument over
and allow any excess water to drain out of the chamber.
The wet sponge creates a 100% water saturated air
environment for the probe, which is ideal for dissolved
oxygen calibration.
2.5 HAND STRAP
The hand strap is designed to allow comfortable operation of the Model 85 with minimum effort. If
the hand strap is adjusted correctly, it is unlikely that the instrument will be easily dropped or
bumped from your hand. See figure on previous page.
To adjust the hand strap on the back of the meter, unsnap the vinyl cover and pull the two Velcro
strips apart. Place your hand between the meter and the strap and adjust the strap length so that your
hand is snugly held in place. Press the two Velcro strips back together and snap the vinyl cover back
into place.
2.6 THE METER CASE
The meter case is sealed at the factory and is not intended to be opened, except by authorized service
technicians. Do not attempt to separate the two halves of the meter case as this may damage the
instrument, break the waterproof seal, and will void the manufacturer's warranty.
YSI, Incorporated Model 85 5