Hitachi UH5300 Instruction Manual page 60

Fig. 3-14 Autozero Execution
(3) Sample measurement
Place the sipping nozzle in the sample, push the sipping lever to
sip the sample, and execute the sample measurement.
NOTE: Pressing the [START] button without pushing the sipping
lever permits measuring the sample without sipping.
(4) After the completion of the sample measurement, store or print
the measurement data.
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3.3.5