TDT RZ2, Manual

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6-74 System 3
PZ3 Low Impedance Amplifier
Enabling the High Input Range Mode
The high input range mode can be enabled through the PZ3_Control macro.
To enable the high range input mode, select
20 mV from the Input Range option
on the Options tab.
Testing your Electrode Impedance
Impedance measurement may be enabled programmatically or using the
Display Mode
button.
Enabling Impedance Mode
To enable impedance mode manually, push and hold down the Display Mode button
on the PZ3 front panel.
During impedance checking all channels are tested in parallel using a ~375 Hz test
signal and the impedance is measured relative to a target impedance (1kW –
15kW) specified by the user (set using the PZ3_Control macro). The LEDs on the
PZ3 (and in the PZ3 display on the RZ2 LCD) will light green when the electrode
impedance is less than or equal to the target impedance or red when electrode
impedance is greater than the target impedance value.
Impedance Checking For True Differential Mode
Impedance values of either recording (+) or alternate indifferent (-) channels can
be tested.
To toggle between (+) and (-) channel impedance measurements, press the
Display Mode button on the PZ3 front panel.
The status LED located below the
Display
button of the PZ3 will flash green while
electrode (+) channel impedance is being tested or red while alternate indifferent
(-) channel impedance are being tested.
Returning to Signal Acquisition Modes
To leave Impedance mode, simply hold down the Display Mode button on the PZ3
front panel after enabling impedance mode.
Battery Overview
The PZ3 amplifier features two Lithium ion batteries to allow for longer record times.
A three-position switch selects the active battery between Bank-A, Bank-B, or both
banks off.
Green: Less than or equal target
impedance
Red: Greater than target impedance