# CMM IV

URL: https://irs.systems/en/docs/cmm-iv

The current measurement module CMM-IV can be used to measure, evaluate and check current consumption of a dynamic DC load, typically an automotive electronic control unit. It can measure currents from 1µA to 100A<sub>DC</sub> (190A range) with automatic range selection that switches within microseconds. The current range from 1µA to 190A is split into 7 ranges, i.e. seven decades.

| Range | Nominal Range min | Nominal Range max | Lower Range is selected at | Higher Range is selected at |
| --- | --- | --- | --- | --- |
| 0 | 1 µA | 100 µA | - | 110 µA |
| 1 | 100 µA | 1 mA | 90 µA | 1.1 mA |
| 2 | 1 mA | 10 mA | 0.9 mA | 11 mA |
| 3 | 10 mA | 100 mA | 9 mA | 110 mA |
| 4 | 100 mA | 1 A | 90 mA | 1.1 A |
| 5 | 1 A | 10 A | 0.9 A | 11 A |
| 6 | 10 A | 190 A | 9 A | - |

## Intended use

This module is designed to be used as a current measurement device in an industrial environment. It is not designed to be used as a power switch.

## Purpose of this document

The purpose of this document is to describe how to integrate the module in a test system and how to access it from the software point of view. Limits of application are shown in the [technical data section](/en/docs/cmm-iv/hardware#technical-data).

This document is addressed to system integrators and the users, who are applying the module.

## Document overview

This document contains 3 sections.

- The first section includes an introduction to this manual
- The second section includes description of the hardware
- The third section includes accessing the module from the software point of view.