| This procedure applies only to humidity probes HMP75B, HMP76B, and HMP77B. |
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Open the menu by pressing
Open.
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Select Functions and press .
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Select Chemical Purge and press
Start.
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Confirm the purge by pressing
Yes. Chemical purge takes up to 6 minutes. During that time there are no readings on the display. A message appears every 15 seconds showing the time required to
complete the chemical purge. The chemical purge icon
is shown on the upper left corner.