PRESIDIUM DC709N, User Handbook Manual, Page: 11 / 138

Slide the [ON/OFF] button at the back of the unit to turn on
the unit (Fig. 1.3) and wait for approximately 20
seconds or until the red LED lights up.
Fig. 1.3
Testing to ensure your Presidium Duo Tester is
functioning properly
Simulant test disc
• Press the probe tip onto the simulant test disc located
on the left of the indicator lamp (Fig. 1.4). Apply
sufficient pressure to retract the protruding tip
completely into the probe pen. The indicator should
rise to and remain within the white strip (preferably at
the center of white strip) with “CAL” printed on top,
within two to three seconds.
Fig. 1.4
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