Measurement Modes - % Or Mg/L; Sampling Modes - Manual Or Continuous; Saving, Viewing And Deleting Data - VWR DO220 Manuel D'instructions

Measurement Modes - % or mg/L

This unit provides three distinct measurements: Temperature and
Dissolved Oxygen in either % or mg/L.
The dissolved oxygen measurement unit is indicated on the right side of
the display. Press Mode to switch between % and mg/L.

Sampling modes - Manual or Continuous

The DO220's sampling mode can be set to Manual or Continuous.
Press and hold the Sample/Mode key for 3 seconds to switch between
Manual and Continuous mode. When in Manual mode, press and release
Sample/Mode to initiate a new measurement.
Manual mode: the instrument will update the DO reading until reaching
a stable measurement. The stable measurement will 'lock' on the display
until the user initiates a new measurement by pressing the Sample/Mode
key. Manual mode conserves battery power.
Continuous mode: the instrument will continuously update the dissolved
oxygen measurement.

Saving, Viewing and Deleting Data

The DO220 can save 50 data records. When in measurement mode,
press Enter to save a record. The instrument will confirm saving
the data by displaying SAVE and the data record number for one second.
"Full" is displayed when trying to save data and memory is full. To view
saved data, press Mode until Recall (rCL) is displayed and then press
Enter. Use the Up or Down arrow keys to review different saved records.
Press Mode to escape back to measurement mode.
To delete data records, press Mode while in measurement mode until
Delete (dEL) is displayed. Press Enter. "All" will be displayed and
blinking. Press the Up or Down arrow key to switch between delete 'All'
or 'Each' options. Select either 'All' or 'Each' by pressing Enter while that
option is displayed.
If 'All' is selected, all records will be deleted from memory and 'None'
will be displayed. Press Mode twice to return to the measurement mode.
If 'Each' is selected, the Up and Down arrow keys will allow you to scroll
through the saved data records. Press Enter to delete the selected
8