YSI 5000 - Manual (Page 23)

20
Auto Cal
1. Prepare the probe according to the instructions in the Probe Operations Manual.
2. Connect the probe to the meter.
3. Place the probe in a BOD bottle containing about 1 ″ of water to provide a 100% relative
humidity environment.
4. Press [ ] to turn the instrument on.
5. Allow the probe to polarize and the temperature to stabilize for at least 15 minutes. If
calibration is performed prematurely the values will drift and may be out of specification.
6. Press the [CALIBRATE] soft-key to change to Calibration mode. The following display will
appear.
98.0
*
% 8.15
mg/L
Calibrate
0.0
ppt
740
mmHg
24.38°C 11:33
AM
AUTO CAL DO CAL SETUP DIAGNOSIS
7. Model 5100: Verify that the barometer reading is correct. Calibrate the barometer, if
necessary, as shown under 6. Dissolved Oxygen Calibration, Barometer.
Model 5000: Enter the current barometric pressure as shown under 6. Dissolved Oxygen
Calibration, Barometer.
8. Make sure that the display readings are stable, then press the [AUTO CAL] soft-key to
calibrate Dissolved Oxygen. The message “ D.O. CALIBRATION SAVED ” will be displayed for
a few seconds.
98.0 * % 8.15 mg/L
Calibrate
0.0 ppt 740 mmHg
24.38°C 11:33 AM
D. O. CALIBRATION SAVED
AUTO CAL DO CAL SETUP DIAGNOSIS
9. Press [MODE] to return to the Main mode. The instrument is now calibrated and ready to
measure dissolved oxygen and temperature. See 7.1 Main Mode, Making Measurements.
Message