According to the standard specifications published by Arbin, integrating a Gamry device with an Arbin system typically limits the device’s original frequency capability from 2 MHz down to 100 kHz. However, in this article, we will introduce a solution that allows the system to retain the full 2 MHz frequency, with some trade-offs to consider.
Pre-Conditions for Achieving 2 MHz EIS with Gamry
Incorporating Electrochemical Impedance Spectroscopy (EIS) into battery testing workflows at high frequencies presents two major challenges that must be addressed to maintain Gamry’s full 2 MHz capability:
1. Direct Connection to the Battery is Required
At high frequencies, electrical signals become extremely sensitive to parasitic inductance 그리고 contact resistance. To ensure measurement accuracy, the Gamry device must be connected directly to the battery terminals using Gamry-supplied cables. Avoid any test fixtures, intermediate connectors, or third-party extensions that could degrade signal quality.
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Use Short, Specialized Cables (<60 cm)
Cable length is critical when operating at 2 MHz. Even an extra few centimeters can introduce signal distortion or unwanted noise. Only Gamry’s shielded cables, with a length of less than 60 cm, should be used to preserve signal integrity.
Connection and Configuration
Connection Diagram example
To assist with proper setup, refer to the example connection diagram below:
Integration Example
In this example, we will integrate the following components:
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A High Precision Battery Testing System (HPS All-In-One) 와 함께 two integrated mini temperature chambers
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Two Gamry devices (one dedicated to each temperature chamber)
By default, Arbin’s standard configuration connects the Gamry device to the system via the ACIM port, which restricts the Gamry’s usable frequency to 100 kHz. To retain the full 2 MHz capability, we will instead connect the Gamry device directly to the battery terminals.
However, since the user also requires temperature control during testing, the Gamry cables must pass through the hole in the pressure valve (highlighted in red in the image). After routing the cables through this opening, the cable heads can then be connected directly to the battery.
Arbin & Gamry software configuration
Step 1: Gamry software
Locate the Gamry device’s serial number directly on the device.
For this setup, the relevant serial numbers are 36072 그리고 36075.
Step 2: Device Setup in Gamry
Assign the two Gamry devices as follows:
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Gamry 1 → IFC1010-36072
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Gamry 2 → IFC1010-36075
You can adjust the device order using the green arrow button.
The system assigns device IDs sequentially from top to bottom, starting with 1, then 2, 3, … depending on the order.
Step 3: Mapping Gamry Devices to Arbin Software
Once the Gamry devices have been set up, they need to be mapped within the Arbin software:
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Gamry 1 (IFC1010-36072) → Map to the first channel in Arbin.
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Gamry 2 (IFC1010-36075) → Map to the second channel in Arbin.
This mapping ensures proper synchronization between the Gamry instruments and Arbin’s control system, allowing the devices to operate correctly during experiments.
With the mapping in place, device control is automatically synchronized between the Arbin IV boards and the Gamry instruments:
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When running a channel on the first IV board (192.168.1.6), the EIS step (pause step) will trigger Gamry 1 (serial 36072) to perform the EIS test on the battery.
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When running a channel on the second IV board, the EIS step will instead trigger Gamry 2 (serial 36075) to perform the test.
This configuration ensures that each IV board communicates with its assigned Gamry device consistently during EIS testing.
Trade off:
Trade-Off Considerations
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Standard Configuration
In the default setup, Gamry’s cables are connected to the Arbin machine’s ACIM port, which is shared by all channels on the same board.-
This means two channels can share a single Gamry device.
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The devices are able to work synchronously, ensuring that one channel can wait for the other as needed.
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High-Frequency Configuration (2 MHz)
To achieve 2 MHz operation, Gamry’s cables are not connected to the Arbin ACIM port, but directly to the battery.-
In this mode, schedules can only be executed on the specific channel being run.
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Shared synchronous operation between channels is not possible under this setup
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