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Old 11-10-2007, 06:26 PM
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Arrow TDS pen calibration
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I bought some calibration solution that says 1500 ppm at .70 conversion factor.

It says to dip it into the solution and calibrate it to 1500. Well when I put it in it said 70.(you multiply by 10 to get the ppm) I turned the calibration dial to put it to 150 and it only went up to 90.

Does this mean I need a new pen? Or what am I doing wrong?

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Old 11-10-2007, 06:28 PM
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Who makes your pen? Are you sure your pen isn't on the other standard of .50?
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Old 11-10-2007, 06:30 PM
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Hanna TDS 601
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Old 11-10-2007, 06:49 PM
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Quote:
Originally Posted by cwil916 View Post
Hanna TDS 601
Is it this one?

If so here is the manual: Sorry the PDF is to large for the site, it is at the bottom of this page: OpenDNS
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