YSI 600DW-B Sonde - Manual (Page 171)

650 MDS Section 3
Barometer:
Range: 500 to 800 mm Hg
Resolution: 0.1 mm Hg
Accuracy: +/- 3 mm Hg within +/- 15 C of the calibration temperature
Communication Protocol:
RS-232 to all sondes and for data transfer to PC and for software updates
GPS via Y-cable – NMEA 0183
Standard Backlight Feature: 4 LEDs illuminating LCD
Keyboard: 20 keys including Meter On/Off, Backlight On/Off, Enter, Escape, 10 Number/Letter Entry
Keys, 2 Vertical arrow keys, 2 Horizontal arrow keys, 1 minus/hyphen entry key, 1 decimal point/period
YSI, Incorporated Drinking Water Monitoring Systems Operations Manual 3-62