User Manual
Table Of Contents
Operator's Manual WEE-1000 vii
Precautions for Input Jack Use
NOTE
Checking electrode potentials for all active electrodes
Check the original electrode potential for all active electrodes by programming a montage with the system reference
electrode (Use the pattern VA (factory default setting) or select the 0 V button for reference electrode on the Montage
dialog box). Refer to “Programming Patterns” in Section 4 of the operator’s manual of the electroencephalograph.
The digital EEG displays the EEG waveform in each channel by subtracting two electrode potentials selected to a
montage. The subtracted result will be incorrect, if the electrode attachment is not correct, the original electrode
potential is flat or unstable, or artifact is superimposed on the original electrode potential. Omit the measurement result
if the displayed EEG waveform is incorrect.
Do not perform EEG measurement without the Z, C3, C4, A1 and A2 electrodes.
Use of input jack Z
Connect the lead from the electrode (Z electrode) attached on the patient’s nasion to the input jack Z on the electrode
junction box. The purpose of this input jack is to eliminate AC interference positively.
NOTE
The input jack Z is also used for checking electrode impedance.
Use of input jacks C3 and C4
Connect the leads from the electrodes attached on the positions C3 and C4 to the input jacks C3 and C4 respectively.
NOTE
• The C3 and C4 electrodes are the system reference electrodes for EEG measurement.
• The input jacks C3 and C4 must be attached for EEG measurement even when the C3 and C4 are not
programmed in any montage.
Use of input jacks A1 and A2, C3 and C4 during skin-electrode impedance check
When checking each electrode impedance, connect the leads from the electrode attached on the positions A1, A2, C3
and C4 to the input jacks A1, A2, C3 and C4 respectively.
NOTE
• The A1 and A2 electrodes are the reference electrodes for skin-electrode impedance check.
• The input jacks A1 and A2 in addition to the Z, C3 and C4 must be attached for the electrode impedance
check.