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Intracellular Electrometer Model 3100

The Model 3100 includes:

  • Operator's manual
  • Rack mount hardware
  • Remote international power supply
Note: For proper operation, the purchase of a Model 3100-compatible headstage (Catalog#: 920500) is required. A Model 3100 Mini Headstage will be automatically added when you add a Model 3100 to cart.

Please note that A-M Systems instruments are not approved for use with human subjects in either a clinical or research environment.

Catalog # Description Price Quantity
920000 Model 3100 Intracellular Electrometer 110 V, 60 Hz $736.00 
Quantity:
920005 Model 3100 Intracellular Electrometer 220 V, 50 Hz $736.00 
Quantity:
920500 Model 3100 Mini Headstage $210.00 
Quantity:
749931 Extended Warranty, 2 Year, Model 3100 with headstage $175.00 
Quantity: 



Summary

The Model 3100 Intracellular Electrometer is a simple to use, low cost intracellular amplifier. It is compatible with Model 3100 Mini Headstage (Product#: 920500), whose probe measures 1.1 cm in diameter and 5.6 cm in length, and weighs only 10 grams.

The dual-transient control provides extremely precise adjustments to transient suppression during membrane recordings. The DC balance control eliminates the need for an external bridge or a differential input oscilloscope. The DC offset provides electrode offset control up to ±1 V. An internal square-wave generator supplies a 100 Hz current pulse to determine electrode resistance. It is also useful to adjust capacitance compensation. Capacity compensation can adjust up to 35 pF of electrode capacitance. Additional stray capacitance can be reduced by using the driven shield connector on the head stage probe.

The Model 3100 has an advanced capacitance "Ringer" control for clearing electrode tips and enhancing the membrane penetration of neurons. The Ringer's amplitude (0 - 10V biphasic) and frequency (2-8 kHz) of the pulsed oscillations sent to the electrode can be adjusted on the front panel.

A six position low pass filter and a 60 Hz notch filter are available for the researcher to diminish extraneous frequencies and external line noise.

The current injection system allows for both internally generated current and externally generated current. This current can be set for continuous or momentary injection. The sum of the current can be gated by an external TTL logic signal source.

The small size of the amplifier and its remote power supply offers the advantage of placing the amplifier near to the experimental set up. For example, the amplifier can be placed within a Faraday cage with minimal power-line interference.

Specifications

  • Noise (10 Hz - 50 kHz): 18 µV, rms shorted; < 350 µV, 20 MΩ source 
  • Input impedance: 1013 Ω; capacitance adjustable to zero 
  • Bias current: Adjustable to zero 
  • Voltage gain: x1 and x10 
  • Capacity Compensation: -4 pF–35 pF 
  • DC Offset: ±1 V 
  • Max internal current: 1 µA 
  • External current: 100 nA/V; 10 V maximum 
  • Electrode test: 100 Hz, 10 nA; (i.e. 10 mV/MΩ electrode resistance) 
  • Ringer: 0 - 10 V biphasic, 2 - 8 kHz 
  • External power supply for low noise 
  • Custom settings available—call for details! 

FAQ

The following is a list of commonly asked questions regarding this product. If you have any additional questions, please feel free to contact us at 800-426-1306 for further information.

  • Can I get a replacement Instruction Manual for this instrument?
  • Is it possible to have a Model 3100 amplifier customized for my preferred gain and filter settings?
  • Do you sell extension cables for your headstages?
  • My Model 3100 is not working, but our university has an excellent electronics facility. Can we repair the unit ourselves?
  • Can I use this instrument outside of the United States?
  • What are the proper operating and storage conditions for my Model 3100?
  • Can I get a replacement Instruction Manual for this instrument?

    Additional Operator's Manuals are available for download by clicking on the 'Downloads' section from the menu bar at the top of this web page.

    Is it possible to have a Model 3100 amplifier customized for my preferred gain and filter settings?

    Yes, in most circumstances, we can easily customize at our factory any of our amplifiers' filter and/or gain settings. Please contact technical support (800-426-1306, or tech@a-msystems.com) for more information.

    Do you sell extension cables for your headstages?

    We do not sell extensions, however we do sell new headstages with longer cables (for a small customization charge). The maximum length is usually 12 feet. Typically, the main amplifier needs to be returned to us for calibration with the new longer headstage cables.

    My Model 3100 is not working, but our university has an excellent electronics facility. Can we repair the unit ourselves?

    It is recommended that A-M Systems perform the needed repairs as we are the most familiar with the units. However, if you are confident in your electronic technician's skills, you can always purchase the schematics for the from us and attempt them yourself. Please note that any user-attempted repairs during the warranty period may invalidate the warranty, and might invoke additional charges to correct them if A-M Systems is required to make repairs at a later date.

    Can I use this instrument outside of the United States?

    All of A-M Systems instruments can be modified to work outside of the United States. Typically, this modification is made at the factory (at no additional cost) prior to shipping to our customers. Just inform the customer service department where the instrument will be used, so our technicians can prepare the proper power supply modifications.

    What are the proper operating and storage conditions for my Model 3100?

    The Model 3100 is designed to be used under laboratory conditions. Operate in a clean, dry environment only. Do not operate in a damp environment. Temperatures for storage and operation should be between 5 °C and 40 °C. Storage should be indoors in a cool dry place.

    Headstage

    The headstage is a small and light weight probe measuring 1.1 cm in diameter by 5.6 cm long and weighing only 10 grams. It is required for operation of the Model 3100.

    Options & Accessories

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