Aqua Medic pH-Computer Mode D'emploi page 9

3. Description of the front plate
1. LED–digital display
2. Prog./Enter-button
3. High/Low-button
4. LED for High/Low status display
5. SET-button
6. + and – button
7. BNC-connection for electrode
8. Hys-button for adjusting the hysteresis
9. Connection plug
10. Calibration buttons
QUA D QUA D
7.25
High Prog
Low
High
Low
Out
CAL CAL
pH4
pH7
pH Computer
9