he 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 MOhm or GOhm 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 kOhms.
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 MOhms or X.XXX GOhms RESISTANCE RANGE: 0-199.9 MOhms or 0-1.999 GOhms, selected by toggle switch ACCURACY: 1 MOhm with resistance RANGE switch in GOhm position, 100 kOhms with resistance RANGE switch in MOhm position

OUTPUT: 1 mV / MOhm with resistance RANGE switch in GOhm position, 10 mV / MOhm with resistance RANGE switch in MOhm position, BNC connector, output impedance 250 Ohms 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.