YSI 6 series User Manual page 146

650 MDS Section 3
"click". After connecting the sonde to the 650, press the "on" button on the upper left of the 650 keypad to
activate the 650 Main menu as shown below:
Using the arrow keys, highlight the Sonde run entry in the Main 650 Menu and press the Enter key.
Readings from the 6-series sonde sensors will appear on the 650 Main Display in real-time as shown in the
following diagram.
The two windows at the top of the display give the capability of logging the displayed readings to either the
650 (top left) or the sonde (top right) memory and allow the user to activate the wiper on turbidity,
chlorophyll, and rhodamine WT probes if they are present in the sonde. Instructions for use of these
windows are provided in subsequent sections of this manual. Note also that there is a disk with rotating
segments in the upper right corner of the display whose movement confirms that the 650/sonde interface is
functional.
To return to the 650 Main menu, press the Escape key.
CAUTION: When using the 650 MDS in field applications which are in close proximity to communication
towers and heavy industrial equipment, or which involve very low humidity conditions, the user may
experience problems with logger function. If possible, the user should relocate the sampling site away
from these potential sources of interference. In most cases, symptoms will involve instrument shutdown or
display lockup. These problems can usually be overcome by either simply pressing the on/off key to
reactivate the meter display or by resetting the instrument by removal of battery power as described in
YSI Environmental Monitoring Systems Operations Manual 3-16