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(18) SERIES RESISTANCE COMP. (%) potentiometer
Potentiometer for setting the compensation for the SERIES RESISTANCE in
percent of the value that is set at the BRIDGE BALANCE potentiometer 12.
Therefore, it is important to set the BRIDGE BALANCE correctly before using the
series resistance compensation to avoid oscillations (see also 40 and 41).
(40) R
COMP. switch
S
Switch for activating the SERIES RESISTANCE COMPENSATION circuit. The
active circuit is indicated by 41.
(41) R
COMP. LED
S
LED indicating that the SERIES RESISTANCE COMPENSATION circuit is active. The
amount of SERIES RESISTANCE COMPENSATION is set by 18.
Very Important: When using the SERIES RESISTANCE compensation do not use the
potential values recorded from the POTENTIAL OUTPUT (mV) BNC connector (27) or the
value shown at the POTENTIAL display (39) as a measure for the membrane potential, since
these values include also the additional voltage generated by SERIES RESISTANCE COMP.
for compensation of the voltage drop at the SERIES RESISTANCE.
For instance, when for calculating I/V curves do not use the potential values recorded from
the POTENTIAL OUTPUT (mV) BNC connector (27). Use the COMMAND potential
instead.
(42) MODE OF OPERATION switch and LEDs
Switch for selecting the MODE OF OPERATION
VC x10: the amplifier operates in Voltage (Patch) Clamp mode. The COMMAND
POTENTIAL is enhanced by a factor of ten.
VC:
the amplifier operates in Voltage (Patch) Clamp mode
Important: VC modes do not function properly with sharp microelectrodes, i.e. electrodes
with more than 10 M resistance.
OFF:
all inputs of the amplifier are switched OFF, and the amplifier is set to CC mode.
R
test and potential measurement work
EL
CC:
the amplifier operates in Current Clamp mode
CC x10: the amplifier operates in Current Clamp mode. The STIMULUS amplitude is
enhanced by a factor of ten.
EXT:
the amplifier is set to CC mode. R
selected by application of a TTL HIGH (+5 V) signal to the respective BNC at the
rear panel (see also chapter 4).
The MODE OF OPERATION that is currently activated, is indicated by the respective LED
above the switch.
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version 2.2
ELC-03XS User Manual
, R
test, BR, x10 or VC / CC modes can be
S
EL
page 17
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