| MODES OF OPERATION
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RPEL: Electrode resistance test potential electrode
VC: Voltage Clamp mode
CC: Current Clamp mode
RCEL: Electrode resistance test current electrode |
| HEADSTAGES |
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| Potential headstage:
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Differential input (for suppression of bath potentials), cmr > 80 dB; Input resistance: >1013 Ω; operating voltage ±15 V
Electrode connector: BNC with driven shield; driven shield range: ±15 V, output impedance 250 Ω
Reference connector (bath): gold-plated SMB, grounded shield
Ground connector: 2.3 mm connector or headstage enclosure
Size: 65x25x25 mm, headstage enclosure is connected to ground
Holding bar: diameter 8 mm, length 10 cm
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| Current headstage:
|
Operating voltage range: ±150 V
Input resistance: >1012 Ω (can be internally trimmed)
Electrode connector: gold-plated SMC connector, grounded shield
Power dissipation: 6 W
Size: 100x55x35 mm, grounded enclosure |
| Current range: |
150 µA into 1 MΩ (standard)
Current range switch (optional): x0.1, x1, x2, x5 (other ranges available)
|
| Bandwidth and speed of response: |
Full power bandwidth (REL = 0): >100 kHz
Rise time (10-90%): <30 µs (current pulse of 100 µA applied to REL = 1 MΩ)
Bandwidth switch: wide band or 10 Hz for simultaneous patch clamp recordings
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| Current electrode parameter controls: |
Leakage current: adjustable to zero with ten-turn control
Offset compensation: ±500 mV, ten-turn control
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| Potential electrode parameter controls: |
Capacity compensation: range 0-30 pF, ten turn control
Offset compensation: ±300 mV, ten-turn control
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| POTENTIAL OUTPUTS
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Potential electrode: two outputs, sensitivity x10 mV and x40 mV, output impedance 50 Ω; output voltage range ±15 V
Current electrode: sensitivity x10 mV; output impedance 250 Ω,
output voltage range ±15 V
DISPLAY (switch selected): XXX mV
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| AUDIO MONITOR: |
Pitch correlated with potential signals
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| OSCILLATION SHUT-OFF: |
Turns off current injection and capacity compensation, function indicated by red / green LED, disabled / off / reset switch, threshold set with linear control (0-1200 mV)
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| ELECTRODE RESISTANCE TEST (both electrodes): |
100 mV / MΩ, obtained by application of square current pulses ±10 nA, display XX.X MΩ, selected automatically
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| CURRENT OUTPUTS: |
Uncompensated output signal: sensitivity 0.1 V/µA, output impedance 50 Ω, output voltage range ±15 V
Compensated /filtered output: sensitivity: 0.1…10 V / µA (0.1, 0.2, 0.5, 1, 2, 5, 10 V / µA) steps selected by rotary switch, with low-pass Bessel filter, output impedance 50 Ω
Sensitivity monitor: +1…+7 Volt, 1V / switch position, output impedance 50 Ω
DISPLAY: X.XX µA
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| CURRENT OUTPUT FILTERS: |
Four-pole low-pass Bessel filter
16 corner frequencies: 20, 50, 100, 200, 300 500, 700, 1k, 1.3k, 2k, 3k, 5k, 8k, 10k, 13k, 20k Hz.
Frequency monitor: -8…+7 V, 1 Volt / switch position, output impedance 50 Ω
|
| CURRENT CLAMP |
Inputs: 1 µA /V
Input resistance: >100 kΩ
HOLD: X.XX µA, ten-turn digital control with -/0/+ switch, maximum 10 µA.
|
| Noise (in current clamp): |
Potential output: 100 µV pp
Current output: 200 pA pp with 1 MΩ resistance and 10 kHz bandwidth (internal four-pole Bessel filters)
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| Speed of response (in current clamp):
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(1% settling time; potential output signals after application of square pulses of 1V with 1 MΩ electrode resistance)
Potential electrode: <10 µs
Current electrode: <50 µs
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| VOLTAGE CLAMP: |
Input sensitivity: :10 mV
Input resistance >100 kΩ
HOLD: XXX mV, ten-turn digital control with +/0/- switch, maximum 1000 mV
RISE TIME LIMIT: 0-0.2 ms
GAIN: 10 µA/V – 10000 µA/V , ten-turn linear control.
INTEGRATOR TIME CONSTANT: 100 µs – 10 ms, potentiometer
OUTPUT CURRENT LIMIT: 0-100% linear control.
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| Noise (in voltage clamp):
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filters set to 10 kHz, other settings see below
Potential output: <100 µV pp
Current output: <10 nA pp at 10 kHz, < 2 nA at 500 Hz
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| Speed of response (in voltage clamp): |
1 % settling time: < 80 µs for 10 mV step and < 100 µs for 100 mV step applied to cell model (Re = 1 MΩ, Rm = 100 kΩ, Cm = 0.1 µF) |
| POWER REQUIREMENTS: |
115/230 V AC, 60 W (1.25 / 0.63 A fuse)
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| DIMENSIONS: |
19″ rackmount cabinet, 19″ (483 mm) wide, 14″ (355 mm) deep, 5.25″(132.5 mm) high
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| WEIGHT:
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7 kg
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