When the test has been downloaded into the HCU, the computer screen will automatically switch to the Monitor tab.
![1](drex_bullet_1_3.png) Test Guidance
Test Guidance Box will give commands to progress the test session
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![2](drex_bullet_2_3.png) Test Controls
Click Right Arrow to progress test session
Click Left Arrow to Recheck an impedance Error
Description
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Key
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Display
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To begin the test press:
Baseline impedance measurements will automatically occur.
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TAKING BASELINE
IMPEDANCES...
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Individual electrode impedances are calculated.
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CHECKING
IMPEDANCES...
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If any individual electrode (1,2,3,4,5,6,7,R) has an impedance too high to run the test (>70kΩ), then the display will show:
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CHECK 1234567R
< RECHECK OK >
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Reprep the scalp for the referenced electrode and press:
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CHECKING
IMPEDANCES...
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Once all electrodes have passed the impedance check the display will show:
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CHECK GOOD
< RECHECK OK >
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To continue the test press:
The display will show that is playing stimulus N of a total of M:
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PLAYING STIMULUS
N/M...
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