Instrument Operation; Buffer Set Selection; Ph Calibration; Calibration In The Ph Autolock Mode - YSI EcoSense pH1000A User Manual

I N S T R U M E N T O P E R A T I O N

BUFFER SET SELECTION

The pH1000A has two buffer sets: 7.00, 4.01, 10.01 pH and 6.86, 4.00,
9.18 pH. The 7.00, 4.01 and 10.01 pH buffer set is the factory default.
The pH1000A will automatically recognize the buffer used as long as
the correct buffer set is selected and the electrode is in good operating
condition. Additionally, the pH1000A will automatically adjust the
buffer value for temperature during calibration (see Appendix
To change the buffer set, turn off the unit, then press and hold the
Stand key while turning on the unit again. There is no need to repeat
this procedure every time the unit is power up unless the selected
buffer set needs changed.

pH CALIBRATION

The pH1000A can be calibrated to one, two or three points. The first
calibration point must be 6.86 or 7.00, depending on the buffer set
selected.

CALIBRATION IN THE pH AUTOLOCK MODE

In the pH AUTOLOCK mode, the meter will wait for the measurement
value to become stable before completing the calibration.
1. Turn the unit on. Press and hold the Clear key for 2 seconds - all
LCD elements will light up. The meter clears all calibration values
stored in internal memory.
2. Connect the pH electrode to the BNC input and the temperature
connector to the temperature input. The "pH" icon and "AUTO"
icon will light up. One of the buffers in the pre-selected buffer set
will start to flash.
• The "ATC" icon will light up if a temperature sensor is
connected.
• The "MAN" icon will light up if no temperature sensor is
connected.
3. Rinse the pH and temperature (if applicable) sensors with distilled
water and immerse in pH 7 or 6.86 buffer solution, depending on
the buffer set selected. Allow the temperature reading to stabilize
if a temperature sensor is connected, or manually change the
temperature reading with the up and down keys if no temperature
sensor is connected.
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