YSI 5000 - Manual (Page 27)

24
98.0
*
% 8.15
mg/L
Salinity
0.0
ppt
740
mmHg
24.55°C 11:35
AM
Press ENTER to SAVE SETTING
UP DOWN DIGIT NEXT
Using the [UP], [DOWN] and [DIGIT] soft-keys, enter the salinity value.
Press [ENTER] to confirm. The message “SALINITY SETTING SAVED” will be displayed as shown
below.
98.0
*
% 8.15
mg/L
Calibrate
10.0 ppt 740 mmHg
24.57°C 11:36 AM
SALINITY SETTING SAVED
AUTO CAL DO CAL SETUP DIAGNOSIS
NOTE: For accurate DO readings, the salinity setting MUST match the salinity of each sample
measured.
6.2 Zero Calibration
In rare applications, the accuracy of the calibration can be improved by performing a zero
calibration along with one of the procedures discussed previously.
All oxygen probes have a small background current, even in the absence of oxygen. Model
5000/5100 compensation is based on the average background current of YSI probes. This is the
default zero value. Using this average will result in errors with probes whose background current
differs from the average.
Note: Errors will be insignificant in most applications. See 10. Understanding Dissolved
Oxygen Error Factors.
For highest accuracy measurements, a zero calibration should be performed to compensate for
the specific background current of the probe in use.
To calibrate to a true zero, place the probe in a zero oxygen environment and adjust the
calibration value to zero.
Flashing digit
Message