YSI 9500 Photometer - Manual (Page 5)

Replacing the Batteries
The battery compartment in the base of the instrument is secured by four screws.
To replace the batteries, remove the screws (set aside), remove the cover and
install the batteries, observing the correct polarity as indicated. Use 3 x 1.5V 'AA’
alkaline batteries.
To avoid potential corrosion damage, remove batteries from the instrument if it is to
be stored or left unused for a long period of time (> 30 days).
GENERAL PHOTOMETER OPERATION
The photometer is controlled by a simple intuitive menu system.
Š The highlight indicates the active line or section of the screen.
Š The and keys move the highlight through the menu choices.
Š The and keys allow selection of options.
Š The flashing cursor in the ‘options menu’ at the bottom of the screen
indicates the action which will occur if the [OK] button is pressed.
Operating Modes
The photometer has two distinct operating modes - the PHOTOMETER mode
and the SYSTEM mode.
The PHOTOMETER mode is the normal operating mode for taking photometer
readings. This mode is engaged automatically when the instrument is turned on
by pressing the key.
In order to conserve battery life, the photometer will switch off automatically
after use. The switch off period is five minutes in normal use, but may be
adjusted in SYSTEM mode.
The SYSTEM mode is used to set the system options. This mode is engaged
when the photometer is turned on using the key and then selecting 'System'
using the and keys and pressing [OK].
Scroll through the menu box to view all the options available.
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