Triplett RHDL50 User manual

User Manual
RHDL50
Humidity and Temperature Datalogger

Introduction
Congratulations on your purchase of the Triplett RHDL50 Relative Humidity
and Temperature Datalogger with LCD Display. This datalogger measures
and stores up to 16,000 relative humidity and 16,000 temperature readings
over 0 to 100%RH and ‐40 to +70°C (‐40 to +158°F) measurement ranges.
The user can easily configure the logging rate, high/low alarm and start‐
mode, and download the stored data by plugging the module into a PC's
USB port and running the supplied PC software. Relative Humidity,
Temperature and Dew Point data can then be graphed, printed and
exported to other applications. The data logger is supplied with a long‐life
lithium battery, which can typically allow logging for one year. This meter is
shipped fully tested and calibrated and, with proper use, will provide years
of reliable service. Please visit our website (www.triplett.com) to check for
the latest version of this User Guide, Product Updates, and Customer
Support.
Features
Memory for 32,000 readings (16,000 temperature and 16,000
humidity readings)

Dew point indication via supplied WindowsTM Software

Selectable data sampling rate: 2s, 5s, 10s, 30s, 1m, 5m, 10m, 30m,
1hr, 2hr, 3hr, 6hr, 12hr, 24hr

Status Indication via Red/Yellow LED and Green LED

USB Interface for Set‐up and Data Download

User‐Programmable Alarm Thresholds for Relative Humidity and
Temperature

Long battery life

Description
1. Protective cover
2. USB connector to PC port
3. Start button
4. RH and Temperature sensors
5. LCD Display
6. Alarm LED (red/yellow)
7. Record LED (green)
8. Mounting clip
LCD Display
1. Short press the button change the display. Temperature units
change by the PC software.
Temperature (°F/°C) Humidity (RH%)
REC
ALM
1
3
2
4
6
7
8
5

LED Status Indication
To save power, the RHDL50’s LED flashing cycle can be changed to 20s or
30s via the supplied software.
To save power, alarm LEDs for temperature can be disabled via the
supplied software.
When the battery is low, all operations will be disabled
automatically. NOTE: Logging automatically stops when the
battery weakens (logged data will be retained). The supplied
software is required to restart logging and to download
logged data.
When both temperature and relative humidity readings
exceed alarm level simultaneously, LED status indication
alternates every other cycle.

Operation

System Software Required:
Windows 7, Windows 8.1 or Windows 10
Minimum Hardware Required:
PC or Notebook with Pentium 90MHz or higher 32 MB RAM;
At least 7 MB of hard disk space available to install Datalogger USB
software.
Recommended display resolution 1024X768 with High Color(16 bit).
INSTALLING THE GRAPHING SOFTWARE and USB
driver
Install the supplied Windows PC Datalogger Software by placing the
supplied program disk in the PC’s CD‐ROM drive or by downloading the
program from the http://Extech.com/instruments/software.asp web
page.
If the installation program does not automatically open and provide on‐
screen prompts, open and browse the CD‐ROM drive, then find and double‐
click on the SETUP.EXE file included on the program disk. Follow the on‐
screen prompts to complete the installation.
Software Install
Run SETUP.up.exe and follow the defaults to install the
RHDL50 software

USB Driver Install
1. Open the root folder of the RHDL50.
2. Open the folder Driver\DriverUSBXPRESS and double‐click on
USBXpressInstaller.exe.
3. Follow the default choices to load this USBXpress driver.
Note: When the RHDL50 is connected to the USB port, the battery inside
the device is discharged at a higher rate than normal. To conserve battery
life, do not leave the RHDL50 connected to the USB port for a prolonged
period of time
RUNNING THE GRAPHING SOFTWARE
With the RHDL50 inserted in the PC’s USB port, double‐click the
Datalogger Graph icon on your desktop to launch the program. The
opening screen will appear as shown below.

The logger will automatically connect and connection status is shown
at the lower left hand corner of the screen.
Click on “Help” and “About” to view the version number,
MENU BAR DESCRIPTION
The main menu for the software appears as follows:

LOGGER SETUP
The CURRENT TIME field will automatically synchronize with the PC
date and time setting.

The MANUAL and INSTANT select buttons allow the user to start
data logging immediately when the Setup window is exited
(INSTANT), or at a later time (MANUAL).
The LOGGER NAME field allows the user to select a unique name
for the RHDL50.
The SAMPLE POINTS field instructs the RHDL50 to take a fixed
number of readings.
The SAMPLE RATE pull‐down menu instructs the RHDL50 to log
readings at a specific rate.
The LED Flash Cycle can be set by the user: longer cycle times help
to extend the battery life.
The ALARM SETTINGS area of the SETUP window allows the user to
set high and low temperature and humidity limits and to disable
the flashing of the RHDL50’s LEDs, thereby conserving battery
energy.
Once the changes have been made, click on the SETUP button to save them.
Press the DEFAULT button to set the RHDL50 back to factory default
conditions. Press the CANCEL button to abort the setup.
Note: Any stored data will be permanently erased when the user
clicks on Setup. To save the data before creating a new
setup, click Cancel and then download the data.
Note: The battery may run out before the RHDL50 has finished
collecting a specified number of sample points. Always ensure
that the remaining charge in the battery is sufficient to last the
complete duration of your logging exercise. When in doubt, we

recommend that you always install a fresh battery before logging
critical data.
If INSTANT was selected in the SETUP window, the RHDL50 begins logging
at the instant the SETUP button is pressed. If MANUAL was selected, the
RHDL50 must be manually started by pressing and holding the device’s
yellow button for approx. 3 seconds, or until the two LEDs on the RHDL50
flash at the same time.
Logging will continue at the programmed sample rate until the number of
readings (sample points) specified in the Setup window is reached.
The green LED flashes once per sample point and the red or yellow LED
flashes when user programmed alarm limits are exceeded. For details, see
LED status guide.
REAL TIME SETUP