YSI 556 MPS - Manual (Page 21)

Probe Module Section 3
YSI Incorporated YSI 556 MPS Page 15
1. Press and hold down the backlight key in the upper right
corner of the keypad and press the “up” arrow to increase
(darken) the contrast.
2. Press and hold down the backlight key in the upper right
corner of the keypad and press the “down” arrow to decrease
(lighten) the contrast.
2.7 Backlight
Press and release the backlight key in the upper right corner of the keypad
to turn the backlight on or off. See Figure 2.1 Front View of YSI 556 MPS.
NOTE: The backlight turns off automatically after two minutes of non-use.
2.8 General Screen Features
Main display
Status Bar
Barometer Reading (optional) –
Updated in real time, not
corrected to sea level
Battery Charge – NiMH label
indicates use of optional
rechargeable battery pack,
pulsing indicates that battery is
charging, flashing indicates
batteries almost exhausted.
Current Time
Current Date
Figure 2.4 Main Screen Menu