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Two Electrode Voltage Clamp Workstation
TEV700-V
Two Electrode Voltage Clamp Workstation
PRICE ON REQUEST
Product code: TEV700-V
Provides two-electrode voltage clamping via an Oocyte Clamp Amplifier and the necessary components typically used with in research involving Oocytes.
Overview
This workstation provides two-electrode voltage clamping (TEVC) via an Oocyte Clamp Amplifier and many of the necessary components typically used with in electrophysiology research involving Oocytes. Measurements can then be recorded via a PowerLab and LabChart data acqusition system, which is purchased separately.
Included with the workstation are:
- Oocyte Clamp Amplifier
- Oocyte Recording Chamber for OC-725C
- Clamp Mount Micromanipulators (Left and Right)
- Magnetic Base for Clamp Micromanipulator (x2)
Two E series electrode holders are typically required with the clamp and varying sizes can be purchased separately:
- (Str, Vent, Ag Wire) for use with the voltage headstage
- (45°, Vent, Handle, Ag Wire) for use with the current electrode
This workstation can also be purchased as part of the Two Electrode Voltage Clamp Workstation System.
Accessories (optional, purchased separately):
- Magnetic Steel Base Plate (305x610x9.5mm)
Features
- High compliance voltage (±180 V)
- Unique bath clamp circuitry
- Ideal for clamping large cells and cell structures, e.g. squid axons
- Extended current measuring range
- Decreased noise level and 4-pole Bessel filter
- An internal switch permits measurements of the current in series with the current electrode, instead of in the bath
- Optional differential voltage headstages
- Buzz controls (1 kHz square wave) for each electrode aid in penetration of cell membranes with a minimum of leakage
- Overload alarm (audible and visual) indicate when the compliance voltage is exceeded safeguarding the Oocyte and indicating that current records are subject to saturation
- DC Offsets for both voltage and current electrodes
- Electrode Test for both electrodes
- Capacity Compensation for the Vm voltage input
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Technical
Oocyte Clamp Amplifier Specifications
| Test Condition #1 | Model cell used to obtain specifications. Model membrane: 1 MΩ in parallel with 220 nF. Current and voltage electrodes both 1 MΩ impedence. | |
|---|---|---|
| Test Condition #2 | Noise measurements made with an 8-pole Bessel filter. | |
| Voltage Recording Channel (Vm) | V Probe Input Impedance | 0.5 x 1012 &, 1 pF |
| Output Resistance | 100 Ω | |
| DC Offset | ± 200 mV at input. Variations from zero with 10 turn control (20 mV/turn). | |
| Noise (0-10 kHz) | 3 µV RMS with input grounded. 20 µV RMS with model cell. | |
| Electrode Test | 10 mV/MΩ read on meter 100 mV/MΩ at Vm x10 output. | |
| Meter Range | ± 199.9 mV full scale | |
| Capacity Compen | 0 - 90 pF | |
| Current Sensing Channel (Bath Clamp) (Im) | Noise (0-1 kHz) | 4.5 nA RMS with bath clamp |
| 10 nA RMS in output leg | ||
| I Monitor Output | 1 nA/mV to 1 mA/10V in 7 steps and 3 ranges, x0.1, x1, and x10. | |
| Gain Telegraph Output | 0.2 to 2.6 V in 7 steps (200 mV/step) and 3 ranges, x0.1, x1, and x10. Compatible with data acquisition software* | |
| Meter Range, full scale | Clamp Current: ± 199.9 µA | |
| Electrode Voltage Ve | ± 199.9 mV; current meter reads Ve when clamp mode switch is off. | |
| Current Electrode Channel | Compliance Voltage | ± 180 V |
| Clamp Speed | 350 µsec; (10-90%) with 100 mV square wave command applied to model cell. | |
| Gain | Variable AC/DC: 0 to 2000 | |
| Fixed DC Gain | Switch selected: 1 x 106 | |
| Ve DC Offset | ± 200 mV at input (20 mV/turn) | |
| Electrode Test | 10 mV/MΩ read on current meter. | |
| 100 mV/MΩ at Ve x10 output rear panel | ||
| Commands | Hold | Manually set with digital potentiometer, 2 digit resolution and 2 ranges: |
| x1 range: ± 1 to 99 mV in 1 mV steps | ||
| x2 range: ± 2 to 198 mV in 2 mV steps | ||
| External | Signals applied to COMMAND IN÷10 1 V applied = 100 mV | |
| Physical Dimensions | Case | 8.9 cmx 43.2 cmx 30.5 cm |
| Voltage Headstage | 12.5 mm D x 5 cm L with 1.8 m cable | |
| Mounting Handle | 4.8 mm D x 6.3 cm L | |
| Bath Headstage | 2.3 cm x 3.5 cm x 4.2 cm with 1.8 m cable | |
| Shipping Weight | 6.8 kg | |
| Warranty | Three years, parts & labor | |
| Power Requirements | 100-130 V or 220-240 VAC, 50/60 Hz, 20 VA | |
Oocyte Recording Chamber Specifications
| Material | Polycarbonate | |
|---|---|---|
| Footprint, L x W | 13 x 7.7 cm (5.1 x 3 in) | |
| Bath Dimensions | ||
| Narrow Bath | 27 x 3.2 x 3.2 mm | |
| Volume | ~85 µl/mm Height | |
| Wide Bath | 27 x 6.3 x 3.2 mm | |
| Volume | ~170 µl/mm Height | |
| Chamber Floor Insert | 25 x 75 x 1 mm Polycarbonate | |
| Input Tubing Size | 1/16 in OD (PE-160) | |
| Output Tubing Size | 1/16 in ID | |
