Hardware Overview > WiFi Dataloggers > RMS-LOG-W-D

RMS Data Logger - intended use

The data logger carries out measurements in a fixed interval, saves all measured data and sends it to the database by radio link. Should the connection be lost, the logger stores the data intermediately to protect data integrity and fills up the data gaps when the connection has been restored. The device has a battery so that logging of measured data is also ensured in the event of a failure in the external power supply.

The data logger provides the following basic functions:

•Logging of the measured values of the connected probe

•Data logging of up to 44,000 pairs of measured values

•Transfer of the recorded data to the RMS software

•Calibration and adjustment of the probe

•Firmware update

•Device audit trail

General information

Topic	Description
Order code	RMS-LOG-W-D
Measured parameter	Give by the digital probes: •rh/temp •Temp only •differential pressure •CO2
Dimensions	74 x 120 x 35 mm3
Weight	174g with wall holder, without batteries.
Housing material	Macrolon 2458
IP	IP65
UL	UL94V2
Power supply	Range: 4.8...6.5V Source: Battery (AA) or USB-C
Digital probes to be connected	•HCD-Sx •HCD-IC •PCD-S •CCD-S •TCD-S
Accuracy (Temperature)	Given by the digital probes
Adjustment	The adjustment function is a RMS-SW standard function and given by the digital probe. The logger does not measure, it forwards the communication to the digital probe during adjustment.
Battery	4 commercially available 1.5V AA batteries Batteries are not supplied with the device Recommended batteries: Energizer L91 AA Ultimate Lithium 1.5 Volt (3000mAh)
Data Logging	For each temperature measurement, the measured values are stored in the memory with the associated time stamp. At a measuring interval of one minute, data can be stored for one month, which corresponds to approx. 44,000 measurements. If the memory is full, the oldest values are overwritten.
Operational temperature range of the logger	-30...85°C
Storage temperature of the logger	-30...85°C
Data memory	44'000 measured values, including the time stamp
Measurement interval	RMS OnPremise: 10s, 30s, 1min ... 60min RMS Cloud: 1min ... 60min
Digital interface	The device communicates completely via WiFi. The USB-C connection is only used for power supply and not for device communication.
WiFi	IEEE 802.11 b/g/n (2.4GHz) Security: WPA-PSK, WPA2-PSK
WiFi range	Freefield: 300m Inhouse: up to 60m (depends strongly on walls and other battiers between the logger and the WiFi access point/router)
Protocoll	HTTPS
Software Compatibility	RMS and RMS-APP
Data volume per interval	Logger sends and receives about 300 bytes to/from the Server every interval
RTCC (Real Time Clock Calendar)	The device is equipped with a real time clock. The time is continuously synchronized if there is a connection to the server.
Relative humidity	95%rh not condensing
Max. altitude	≤ 2000 m a.s.l.
Pollution degree	PD2
Cleaning	The device can be cleaned using a dry or damp cloth or by the use of commercially available soap-based cleaning products.
Repair	Rotronic does not recommend to repair a defective device. Please contact the Rotronic support to initiate a device replacement by a new device.
Manufacturer	Rotronic AG Grindelstrasse 6 CH-8303 Basserdorf Switzerland

Note:

If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

Updated: 28.05.2025

Device description

Device description

General information