Customer Support

We are here to help you!

Our support opening hours:
Monday – Thursday 09:00 – 17:00h
Friday 09:00 – 15:00h

Andreas Freiler

Customer Support

Dr. Susan Beckmann

Customer Support & Sales Support Advisor

Support for German customers is provided via phone:
+49 24143019971

Support for Danish customers is also provided via phone:
+45 61 42 60 77

Support for UK customers is provided by Express Diagnostics:
+44 (0)1752 783508

To assist you with your questions Cortrium uses Teamviewer. You can download the latest version here.

Getting Started

Are you just getting started with your new device?

The C3⁺ Short Manual will get you ready for your first recordings. In this guide, you will learn about the basic usage of the C3⁺ Holter Monitor and about the status coloring.

– Download and install the Data Transfer Tool (DTT)

– Charge the C3⁺ (via PC or via USB charging cable using a power outlet) for at least 1 hour.

– Carry out the C3⁺ setup via the DTT and prepare the C3⁺ for use on a new patient

C3⁺ Short Manual

Instructions For Use

This are the official instructions for use and technical documentation of the C3⁺ Holter Monitor.

C3⁺ instructions for use

Data Transfer Tool

To access the data stored on your device, you need to use our Data Transfer Tool.

Data Transfer Tool (v. 19.10.7)

This version of the data transfer tool is compatible both with the C3 and the C3⁺ Holter Monitors.


It is important to keep a diary of activities and symptoms, while wearing the C3⁺ Holter Monitor.

Download Logbook (EN)

Frequently Asked Questions (FAQ)

We have collected a number of common questions and answers in our FAQ section.

Frequently Asked Questions