YSI 1500 Sport, User Manual, Page: 123 / 134

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15. Appendix F–Temperature Effect on Operation
Both the measurement chemistry and the electrical performance have very
predictable reactions to changes in ambient temperatures. To correct for these
changes, a temperature compensation algorithm has been included in the result
calculation; however, to guarantee accurate results we compensate only over a
limited range. It may be possible that in some situations the 1500 SPORT may
appear to be overly sensitive to "TEMPERATURE STABILITY ERRORS". If
that is the case, there are simple precautions that should be taken to insure the
quality of the results.
Whenever possible, the 1500 SPORT and the fluid supplies should be
equilibrated to the ambient temperature of the actual testing site and then
calibrated. This is quite easily done when testing indoors but requires special
effort if done outdoors.
When testing outdoors the 1500 SPORT should be kept out of direct sunlight.
Direct sunlight can cause rapid warming of the sample chamber, warming the
contents much faster than the larger fluid supply bottles. If this happens it is
quite possible that the 1500 SPORT will detect "TEMPERATURE STABILITY
ERRORS". Simply keeping the unit in the shade regardless of ambient
temperature will assure that the warming or cooling effects are consistent, and
therefore the results accurate.
Temperature Effect On Battery Life Temperature Effect On Battery Life Temperature Effect On Battery Life Temperature Effect On Battery Life
The length of available sampling time is affected by the ambient temperature
while testing. The colder the temperature, the more battery life is affected.
Typically the results of our testing indicate the following estimated guidelines:
Ambient Temperature Sampling Duration Samples Ran
45°C 8 Hours 90
25°C 8 Hours 90
5°C 7 Hours 75
IMPORTANT: IMPORTANT: IMPORTANT: IMPORTANT:
1. All testing done on units that were precharged for 8 hours using YSI Model
1550 wall mounted chargers.
2. These tests were conducted running samples continuously (1 every 2
minutes). It is quite clear that if fewer samples are being run, the actual
sampling duration will increase.
3. Sampling duration is defined as starting point to software lockout. Refer to
Section 5.8 Software Structure, Battery Level Checks for more information
relating to battery voltage monitoring.