Thermo Scientific Orion 310, Instruction Manual

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PerpHecT ® Orion 310, 320, 330 Instruction Manual
General Information on pH Calibration for Orion 310
B. Autocalibration with One-buffer
NOTE: Autocalibration with one-buffer can only be
performed using pH buffer 7.00.
1. Attach the pH electrode to the meter.
2. Choose pH 7.00 Buffer.
3. Press CAL key to initiate calibration sequence. CAL is displayed
for 2 seconds. Select calibration range “7” using the SCROLL
(
▲
,
▼
) keys. Press the YES key to accept. pH 7 will be displayed
for two seconds. Place electrode in pH 7.00 buffer. Reading will be
displayed and updated as calibration continues. When the READY
light comes on, indicating electrode stability, press the YES key
to accept.
4. SLP will be displayed for two seconds. Then 100.0 (or previous
calibration slope value) will be displayed. This value can be edited
using the SCROLL (
▲
,
▼
) keys. Press the YES key to enter
the value.
5. Meter will automatically go into the MEASURE mode.
The READY light will come on to indicate electrode stability.
6. If operating in the LogR mode or using an ATC probe, the
temperature-corrected pH reading is displayed.
7. Rinse electrodes with deionized water and place into sample.
Record pH directly from the main meter display when the READY
light is displayed or when electrode signal is stable.