npi RES-06

The RES-06 module is designed to measure the electrode resistance (REL) for up to six amplifier modules such as the EXT-10C. The electrode to be tested is selected via a rotary switch.

The measurement is performed by applying triangle voltage pulses over the bus of the EPMS-07 housing and the headstage of the amplifier. The triangle pulses are transformed into square current pulses and applied to the respective electrode. The voltage deflection caused by this current injection is recorded, sent to the RES-06 and processed to get a direct reading of the electrode resistance in MΩ or GΩ on the digital display. Although the accuracy of the triangle pulses and the resulting square pulses is not very high, it is sufficient to measure REL with an accuracy of up to 100 kΩ.

The system can be triggered manually with a push button or via TTL pulse with an external device. An analog resistance monitor is provided as well.

Specification

CHANNEL SELECTION:
rotary switch, six positions

RESISTANCE DISPLAY:
LED, XXX.X MΩ or X.XXX GΩ

RESISTANCE RANGE:
0-199.9 MΩ or 0-1.999 GΩ, selected by
toggle switch

ACCURACY:
1 MΩ with resistance RANGE switch in GΩ position, 100 kΩ with resistance RANGE switch
in MΩ positionOUTPUT:
1 mV / MΩ with resistance RANGE switch in GΩ position,
10 mV / MΩ with resistance RANGE switch in MΩ position,
BNC connector, output impedance 250 Ω

MODES OF OPERATION:
manually via push button or triggered by TTL pulses
(HI = measurement, LOW = no measurement)

DIMENSIONS:
12 HP (606 mm) x 3 U (128.5 mm), 7" (175 mm) deep.