YSI 5000 - Manual (Page 29)

26
7. Operation
7.1 Main Mode
When the instrument is turned on it is in the Main mode. The following chart shows the display
during Main mode operation.
8.15
*
mg
/L
24.38°C 12:13
AM
STORE REVIEW SEND CALIBRATE
The bottom row of the display shows the functions of the four soft-keys used during Main mode.
Main mode is used to make measurements, store or review readings and send the current
readings to a computer or serial printer.
Making Measurements
Main mode is used to make dissolved oxygen and temperature measurements as follows:
1. Make sure that the instrument has been properly calibrated (see 6. Calibration).
NOTE: If the instrument has just been turned on, allow at least 15 minutes for the probe to
polarize and the temperature to stabilize before calibrating.
2. Verify that the salinity of the sample matches the salinity setting of the instrument (see 6.1
Dissolved Oxygen Calibration, Salinity).
3. Place the probe in the sample.
4. Provide adequate stirring (at least 1 foot per second), such as that provided by the 5010 self-
stirring BOD Probe.
5. Allow time for the temperature and dissolved oxygen readings to stabilize. The amount of
time varies with temperature, the condition of the probe and the dissolved oxygen level.
6. Read the dissolved oxygen and temperature.
NOTE: Temperature compensation of the dissolved oxygen reading is automatically
determined.
Main