Thermo Fisher Scientific Alpha pH 600 RF (In the process of updating the brand guideline & product image) - Manual (Page 21)

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4 CALIBRATION MODE
4.1 Preparing the Transmitter & Electrode for Calibration
Before starting calibration, make sure that the pH Transmitter is in appropriate
measurement mode (pH or ORP). When the Transmitter is powered on, it starts up
with the measurement mode last used. For example, if the pH Transmitter is
powered off in ORP measurement mode, it starts up in ORP mode when it is
powered on. (Refer Section 5.5 for switching measurement modes)
Be sure to remove the protective electrode storage bottle or rubber cap of the
electrode before calibration or measurement. If the electrode has been stored dry,
wet the electrode in tap water for 10 minutes before calibrating or taking readings to
saturate the pH electrode surface and minimize drift.
Rinse the electrode in de-ionized water after use, and store in electrode storage
solution. If storage solution is not available, use pH 4.01 or 7.00 buffer solution.
Do not reuse buffer solutions after calibration. Contaminants in the solution can
affect the calibration, and the accuracy of the measurements.
The pH Transmitter features two internationally recognized pH buffer standards.
Select the buffer standard you require in the setup mode. (Refer Section 5.4)
Available buffer options are:
• USA buffers --- pH 4.01, 7.00 and 10.01
• NIST buffers --- pH 4.01, 6.86 and 9.18
4.2 Entering pH/ORP Calibration Mode
While in Measurement mode press the CAL key.
1. The display prompts to enter the calibration security code. Press the ▲ or
▼ key to set the calibration security code to “11”, and then press the ENT
key to confirm the calibration security code.
2. The display shows “CAL pH” and “CAL” indicator appears at the top of
display and after 2 seconds delay it automatically leads to the cali on.
ENT
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