YSI pHotoFlex pH Handheld Colorimeter - Manual (Page 56)

Operation pHotoFlex
®
pH
56 ba76123e01 02/2013
Preparatory activities Perform the following preparatory activities when you want to calibrate:
4.6.6 Carrying out the TEC and NIST/DIN calibration procedures
The two calibration procedures only differ in the usage of different buf-
fer sets (see section 4.6.5). Make sure the Cal. type is correctly set in
the pH & ORP / Calibration menu (see section 4.6.4).
For this procedure, use any one, two or three YSI technical buffer solu-
tions in ascending or descending order.
The TEC calibration is described below. With the NIST/DIN calibration,
the NIST/DIN buffer recognition and different nominal buffer values are
displayed. Apart from that, the procedure is identical.
The TEC calibration for pH 10.01 is optimized for the YSI technical buf-
fer solution TEP 10 Trace or TPL 10 Trace. Other buffer solutions can
lead to an erroneous calibration. The correct buffer solutions are given
in the YSI catalog or on the Internet.
1 Connect the pH electrode to the meter.
The pH measured value display is displayed on the screen.
2 Keep the buffer solutions ready. Adjust the temperature of the
buffer solutions, or measure the current temperature if you
measure without a temperature sensor.
1 Press the <M> key (short pressure) repeatedly until the mea-
sured parameter, pH or ORP is selected.
2 Start the calibration with <CAL/ZERO>.
The calibration display appears.
3 Immerse the electrode in buffer solution 1.
4 If the Set temperature menu item appears, measure and enter
the temperature of the buffer manually (measurement without
temperature sensor).
i Buffer recognition TEC
i Immerse sensor in buffer 1
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pH & ORP \ Calibration