User manual for the testo 6651 Ethernet humidity transmitter, covering installation, operation, maintenance, and troubleshooting.
This document is the user manual for the testo 6651 Ethernet humidity transmitter, part of the testo 6600 series. It provides instructions for commissioning, operating, and maintaining the device, which is used for process instrumentation, clean rooms, and climate applications. The manual details the scope of delivery, technical specifications, and the structure of the user menu.
| Measuring range | Depends on probe |
|---|---|
| Resolution | 0.1 % RH or 0.1 °C/0.1 °F |
| Measuring cycle | 1/s |
| Voltage supply | 20 - 30 V AC/DC |
| Relay capacity | 250 V AC/DC, 3 A |
| Operating temperature | -40 ... 70 °C |
| Protection class | IP 65 |
The scope of delivery includes the key cover, rear panel bracket, Ethernet module, and a CD-ROM with catalogue files and P2A update.
Ensure that the probe connector is fully engaged in the transmitter. If communication still cannot be established, contact Testo Service.