
Instruction Manual PD 300
2 DISPLAY AND KEYPAD FUNCTIONS
2.1 Display
The LCD has a primary and secondary display.
• The primary display shows the measured pH or DO value (either in mg/L, ppm
or %, depending on units of measurement selected).
• The secondary display shows the measured temperature.
The display also shows error messages, keypad functions, and program functions. See Figure
2.
Figure 2: Full LCD Screen
1. SETUP mode indicator 7. Oxygen solubility indicator in
mg/L or ppm.
13. Probe indicator
2. MEASurement mode indicator 8. Temperature indicator 14.Calibration indicator
3. CALibration indicator 9. pH buffer indicator 15 Function ON / OFF
indicator
4. pH indicator 10. Automatic Temperature
Compensation indicator
16 HOLD indicator
5. % saturation indicator 11. ERRor indicator 17 READY indicator
6. ppt indicator for input of
Salinity value.
12. Low battery indicator
2
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