Instruction manual for the testo 6651 Ethernet humidity transmitter covering specifications, installation, Ethernet communication, operation, maintenance…
The testo 6651 Ethernet humidity transmitter is described in this instruction manual. It is used with plug-in, adjusted probes from the testo 6600 range and can send readings to a control unit via analog outputs while also recording, documenting and visualizing measurement data over Ethernet.
The manual covers specifications and dimensions, scope of delivery and accessories, product description, commissioning including Ethernet communication, operation via the user menu, status, warning and error messages, and maintenance and cleaning. It also refers to the P2A parameterizing, adjusting and analyzing software.
| Parameters | Humidity (% RH/°Ctd/°Ftd) and temperature (°C/°F) |
|---|---|
| Measuring range | Depends on probe |
| Resolution | 0.1 % RH or 0.1 °C/0.1 °F |
| Voltage supply | 20 - 30 V AC/DC, 300 mA |
| Analog output | 0 ... 10 V ± 15 mV (4-wire), among other options |
| Relay | 4 relays, 250 V AC/DC, 3 A (optional) |
| Display | 2-line LCD with plain text line (optional) |
| Protection class | IP 65 only if the transmitter is wired properly |
| Housing, weight | Plastic, 675 g/1.49 lb |
| Warranty | 2 years |
It is used with plug-in, adjusted probes from the testo 6600 range.
The transmitter requires a 20 - 30 V AC/DC supply with 300 mA power consumption.
Only clean the instrument carefully with a moist cloth; do not use aggressive cleaning agents or solvents.
The optional relay board provides 4 relays rated 250 V AC/DC, 3 A.