YSI 9500 Photometer - Manual (Page 8)

8
Date Format
The option of day/month/year or month/day/year date format is available.
Battery Level
A battery level indicates the remaining battery life. At least 3.0V is required for
successful operation of the instrument.
Locking System Mode Settings
It is possible to 'lock’ the system settings so that these cannot be tampered
with or altered accidentally during use. This may be important where it is
necessary to verify tests have actually been carried out at a particular time or
date, or where procedures always require the use of a sample number or
dilution factor. Please request locking settings from
[email protected] .
Rounding
In the normal default setting, the photometer will round test results appropriately
for the resolution of the test. The rounding applied differs for each parameter
depending on the shape of the calibration curve. This ensures the optimum
precision and accuracy of each test procedure. For normal purposes it is
strongly recommended that the instrument be left in the default setting.
For certain analytical applications, however, it may be useful to switch off the
rounding to display the result data in unrounded form. This may be the case, for
example, when carrying out statistical evaluations of test methods where it is
necessary to use the data in calculation of standard deviation or distribution data.
Time-Out
As a power-saving measure the photometer automatically switches off five
minutes after the last key is pressed.
The photometer may be switched to ‘Long’ time-out which allows 15 minutes
before shut-down or ‘Off’ which allows continuous use. This is particularly
useful when powering the instrument through the USB interface.
Edit User Defined Tests
Users may wish to develop their own test methods and store calibrations on
the photometer. The 9500 has the facility to store up to 30 user-defined
calibrations. See ‘User Defined Tests’ below for full instructions.