Start Datalogging - Extech Instruments RHT35 User Manual

Start Datalogging

1. Configure the logger as previously described and then hold the Start/Stop
for 5 seconds to start logging.
2. Measurements update on the display every 10 seconds. The temperature, %RH, and
pressure measurements toggle every 5 seconds.
3. If the logger is programmed with a Start Delay: After pressing and holding the Start/Stop
button for 5 seconds to start logging, REC will appear on the LCD but will not flash until
the delay time has elapsed and logging has begun.
4. When the datalogger is successfully running, the LED flashes green every 10 seconds (as
long as there is no alarm).
Monitoring Alarms While Datalogging
The LED will flash RED every 10 seconds when there is an alarm. The display also shows 'L'
for low alarm and 'H' for high alarm. To stop the LED from flashing red, plug the logger into a
PC, or power off (short press of the power button).
Placing 'Bookmarks' While Datalogging
To place a bookmark manually during datalogging, press and hold the MARK button until the
measured reading flashes 3 times. Up to eight (8) bookmarks can be placed; the bookmarks
will appear in the logging report.
MAX-MIN Readings
Short press the MAX-MIN button to step through the highest (MX) and lowest (MN) readings
stored in memory.
Checking Battery Status
At any time, short press the MARK button to view the approximate number of days
remaining for battery life. If battery power is critically low, the battery icon will blink once
per second on the LCD display.
Downloading Logged Data (PDF and Spreadsheet Datalog Reports)
1. Press and hold the Start/Stop
2. Plug the logger into the PC USB port (this also stops the datalogger).
3. Open the 'PDF logger Configuration tool' from the list of available files.
4. Choose 'Convert to PDF' or 'Convert to Excel' to generate a report.
5. Select the PC file location where the report is to be saved.
6. The PDF report includes the recorded data, bookmarks, and a trend graph. The
spreadsheet report contains the same data as the PDF report minus the trend graph.
button for 5 seconds to stop the datalogger.
8
button
RHT35-en-GB_V1.0 04/17