FAQ / Frequently Asked Questions
Questions on the products
The ISAscale products mainly provide digital output signals, like CAN, SPI, LVDS, TTL, RS422, RS485, RS232 and Ethernet. For details, please go to the specific datasheet
Standard analog signals have a range of 4-20 mA and 0-5 (10) V. Furthermore, there are ratio metric analogue signals, whose reference value is defined by the customer. Currently, Isabellenhütte doesn’t offer any products with an analog interface.
Why are there 2 pins used for the IVT voltage measurement?
The IVT-MOD includes a 2 pin plug for voltage measurement. It has to be taken into account, that both pins are linked to each other (short-circuit). They are used for connection of the high voltage potential. The reference input is the ground side of the shunt. Datasheet IVT-MOD
What is the mounting direction?
In principle, it doesn’t matter which side of the shunt is connected to the ground since it can be adjusted on the directions of electric current. Depending on where the voltage is measured, it has to be taken into account, that the voltage drop at the shunt can cause an offset of several mV in the voltage measurement.
For a precise measurement please refer to the setup as shown in the datasheet.
How is the current measurement done?
The shunt-based current measurement is based on Ohm’s law (formula: ΔU=R*ΔI). When an electric current flows through a resistor (shunt), a differential voltage drops at the resistive element. This voltage linearly changes with the current flow through the shunt resistor. With specific measurement procedures, this voltage can be thoroughly defined, digitalized and analyzed.
How is such high accuracy achieved by shunt-based measurement?
The accuracy is based on multiple factors: In the beginning, Isabellenhütte in cooperation with a supplier of semiconductors, developed low-noise and low-offset semiconductor components which are used throughout our products. Nowadays the shunts produced by Isabellenhütte use resistive materials for their sensitive element, which are melted and processed in-house. This provides a full control of physical and mechanical properties of the materials which results in compliance of the products with the requirements due to specific field of use.
With the help of the company-owned certified calibration laboratory (Dakks), Isabellenhütte achieves highly accurate current and voltage measurement throughout the production process and with it the transfer of this accuracy to the products. Therefore, all products are also in line with national standards.
What current ranges are covered by ISAscale® products?
Depending on the product family, ISAscale® products cover current ranges from 0 A to 30 kA in both positive and negative direction of current.
How are shunt connectors designed?
The shunts standard shape is flat and comes with a M8 drilling. On request, Isabellenhütte can provide specific shunt shapes, like U or L shapes. Shunts can even be manufactured in a three-dimensional way. Depending on your application and space we can provide you a tailor-made shunt. The shunt can be part of the current bus bar, which allows a space-saving construction.
The initial accuracy is the value, which is achieved at the end of the production process.
As the sensor consists of many components whose properties change over time, as a matter of course the performance of the sensor also changes. Hence, we additionally provide the total accuracy indicator for the worst case, which can occur over life time of the product.
Accuracy of the indicated value (relative error)
The accuracy is always displayed as accuracy of reading, never of range. E.g. if 10 A are measured with an accuracy of 0.1%, the error is 0.01 A, at 100 A the error is 0.1 A. Only the offset is displayed as an absolute error (of range).
Advantages of a temperature calibration
The temperature compensation, which is done within the calibration process, provides high accuracies in current and voltage measurement, independent from the temperature.
Inquiry / Order
How/where can I buy an ISAscale® product?
To buy our products, just get in touch with your local sales agent by following the link. Contact
Not sure which is the right product for your application? Just use our online product advisor.
Can I get a product sample?
In case you need a sample for testing, just ask your local sales agent for a quote. Contact
Does Isabellenhütte support colleges and universities?
Research and Innovation have always been of big interest for Isabellenhütte. Therefore, we’re very pleased to support your university project. Please contact us to elaborate how we can help you with your research. Contact
Can I get a product for rent?
At the moment Isabellenhütte doesn’t offer products for rent.
How can I return a product?
For returns please use our RMA form. A RMA number will be generated automatically.
Methods of payment
When do I have to pay my invoice?
Our standard payment conditions require a payment within 30 days after receiving the invoice. Cash discount cannot be given.
Can I pay with credit card? At the moment, payment with credit card is not possible.
Is there a customer service available?
For technical or commercial questions we are pleased to help you via phone +49 2771 934-258 or email firstname.lastname@example.org
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