Triplett RHDL50 Users Guide

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%)

R EC

AL M

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 Temperature and Humidity Datalogger with

LCD, USB - (RHDL50) — Triplett Test Equipment & Toolspage.

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

DOWNLOADING DATA

**NOTE: Additional Software Instructions can be found in the HELP Section of the
Software for Printing, Saving and Exporting to CSV file.**

Specifications

•

Relative Humidity

Overall
Range

0 to 100%

Accuracy (0 to 20 and 80 to
100%)

±5.0%

Accuracy (20 to 40 and 60 to
80%)

±3.5%

Accuracy (40 to 60%)

±3.0%

Temperature

Overall
Range

‐40 to 158oF (‐40 to

70oC)

Accuracy (‐40 to ‐10 and +40

to

±2oC +70oC)

Accuracy (‐10 to +40oC)

±1oC

Accuracy (‐40 to +14 and 104

to

±3.6oF

158oF)

Accuracy (+14 to 104oF)

±1.8oF

Dew Point
Temperature

Overall
Range

‐40 to 158oF (‐40 to

70oC)

Accuracy (25oC, 40 to
100%RH)

±4.0oF (±2oC)

Logging rate

Selectable sampling interval: From 2 seconds up to 24
hours

Operating
temperature

‐31 to 176oF (‐35 to 80oC)

Battery type

3.6V Lithium (1/2 AA) (SAFT LS14250, Tadiran TL‐5101

or equivalent)

Battery life

1 year (typ.) depending on logging rate, ambient
temperature, & use of

Alarm LEDs

Dimensions/Weight

4x1x.9” (101x25x23mm) / 6oz

(172g)

Battery Replacement

•

It is highly recommended that the battery be replaced every 12 months,
or prior to logging critical data.

The RHDL50 does not lose its stored readings when the battery weakens
or when the battery is replaced; the data logging process will however

be stopped and cannot be re‐started until the battery has been replaced

and the logged data has been downloaded to PC.

Use only 3.6V lithium batteries. Before replacing the battery, remove the
datalogger from the PC.

Follow diagrammatic steps 1 through 4 below.

NOTE: Leaving the RHDL50 plugged into the PC USB port longer than
necessary will cause some of the battery capacity to be lost.

WARNING: Handle lithium batteries carefully, observe warnings on
battery casing. Dispose of in accordance with local regulations.

Safety: Please dispose of batteries responsibly; never dispose of batteries
in a fire, batteries may explode or leak. If the meter is not to be used for 60
days or more, remove the battery and store separately.

Warranty

Triplett / Jewell Instruments extends the following warranty to the original purchaser of
these goods for use. Triplett warrants to the original purchaser for use that the products
sold by it will be free from defects in workmanship and material for a period of (1) one
year from the date of purchase. This warranty does not apply to any of our products
which have been repaired or altered by unauthorized persons in any way or purchased
from unauthorized distributors so as, in our sole judgment, to injure their stability or
reliability, or which have been subject to misuse, abuse, misapplication, negligence,
accident or which have had the serial numbers altered, defaced, or removed.
Accessories, including batteries are not covered by this warranty

Copyright © 2021 Triplett

www.triplett.com