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INW - TempHion Instruction Manual
Settings and Calibration Window and Calculator
Field calibration is performed on each channel separately. To calibrate a specifi c
channel, select Settings and Calibration from the Confi gure Menu in Aqua4Plus
(click the Settings button in Aqua4Plus Light), and then click on the channel to be
calibrated. Follow directions below for each specifi c channel type
.
Use the calibration calculator to perform
one- and two-point calibrations.
Temperature Channel Calibration
The temperature channel rarely needs adjustment. If you think your temperature
channel needs calibrating, contact your service representative.
pH Channel Calibration
Preparing
• INW recommends pH buffers of 4, 7, and 10 for calibration. For a one-point
calibration, select the buffer closest to the expected values in your samples.
For a two-point calibration, select the two buffers that most closely bracket the
expected values in your samples.
• Before calibrating, check the chart in Appendix B2 for the range of M and I
values you can expect to obtain during calibration.
IMPORTANT !
The pH of any buffer varies slightly with temperature change. For this reason,
it is important that you determine the current pH value of the buffer you are
using. Refer to Appendix B1 for a pH Buffer / Temperature chart. From this
chart, determine the pH value at your current buffer temperature and use this
value as the “Ref pH” value in the calibration instructions below. For example,
if you are using a pH buffer of 7 and your buffer temperature is 20 degrees C,
then you would enter 7.02 in the Ref pH box.
