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RH550-EN_V1.3 1/20
3.4 Main Operating Modes (LIVE and RECORD)
Live mode
In LIVE mode (default), the RH550 displays air temperature, relative humidity, and dew point
temperature graphically (item [3] on the Main Interface Screen) and digitally (6). In addition,
the RH550 displays the MIN-MAX values for each digitally (7).
When you power the unit for the first time, the screen will show the display icon LIVE
(default mode) in the Mode area of the screen (10). The instrument is now taking a
temperature and humidity measurement once per minute, and calculating Dew Point
temperature.
Record (Datalogging) mode
In RECORD mode, the RH550 displays air temperature, relative humidity, and dew point the
same way that it does in LIVE mode. In the RECORD mode, the RH550 logs measurement data
to internal files at a programmable sample rate. You can open and view these internal files
right on the RH550 screen or you can transfer them as CSV formatted files to a PC.
Refer to the PC INTERFACE and MAIN MENU sections for additional details.
Use the MAIN MENU (Recording Options sub-menu) to set the sampling rate (HH:MM:SS;
from 00:00:01 ~ 09:59:59), schedule a start time, and set a limit on the number of data points
to record (500, 1k, 5k, 10k, 20k, or MAX). Note that when you select MAX, the RH550 creates
multiple 20,000 data point files, not one large file.
See the MAIN MENU section for details.
Once programmed, tap the START RECORDING button (8) on the Main Interface screen.
Recording will start immediately (if you have not scheduled a start time). If you have selected
a start time in the MAIN MENU, recording will begin at the date and time selected.
Recall recorded data by selecting HISTORY from the MAIN MENU.
Refer to the dedicated MAIN MENU section for more details.
Battery only mode
When recording on battery only power, the recording will automatically stop when the
battery power reaches 5%.
Recording settings significantly affect battery consumption.
The meter will record for approximately 24 hours on battery only power, when the meter is
set to no less than a 10 minute sample rate, with the screen saver mode ON and set to 10
minutes, Sleep mode set to 15 minutes, and Brightness set to minimum.
