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User Manual
RHT60
Precision Psychrometer
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Introduction
Congratulations on your purchase of the Triplett Model RHT60 HygroThermometer with Wet Bulb and Dew Point.. This device measures
Humidity, Air Temperature, Dew Point temperature and Wet Bulb
temperature. Advanced features include Data Hold, Auto Power Off, and
MAX/MIN reading
Meter Description
1. Humidity and Temperature Sensor
2. LCD Display
3. Power ON/OFF Button
4. MIN/MAX Button
5. °F/°C/WBT (Wet Bulb)/Dew Point button
6. HOLD/Backlight Button
Note: The battery compartment is located on the rear of the
instrument
Display Description
1. Relative Humidity %
2. Dew Point
3. Wet Bulb
4. °F/°C
5. Temp/Wet Buld/ Dew Point Display
6. Maximum
7. Minimum
8. Low Battery Indicator
9. Hold
10. RH% Measurement
11. Auto Power OFF Indicator
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Operation
Power
Press the power button( ) to turn power on or off
Taking measurements
1. Hold the probe in the area to be
tested.
2. Allow adequate time for readings to
stabilize.
3. The Relative Humidity measurement
appears in the top display.
4. Pressing the °F/°C/WBT/Dew Point
button
toggles the lower display between
Temperature (°F), Temperature (°C), Dew Point
(°C), Dew Point (°F), Wet Bulb (°C) and Wet Bulb
(°F).
Dew Point measurements
1. To select the Dew Point
measurement, press the
°F/°C/WBT/Dew Point button until
DEWPOINT (°F or °C) appears in
the lower right.
2. Dew Point temperature is now
displayed.
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Wet Bulb Measurements
1. To select the Dew Point measurement,
press the °F/°C/WBT/Dew Point button
until WETBULB (°F or °C) appears in the
lower right.
2. Wet Bulb temperature is now displayed.
Temperature measurements
1. To select the
temperature
measurement,
press the
°F/°C/WBT/Dew
Point button
until °C or °F appears in the lower right.
2. Temperature is now
displayed
Data Hold
Press the button to momentarily
freeze the displayed readings. HOLD will
appear on the upper left hand side of the
display. Press the again to return to
normal operation.
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Minimum (MIN) Maximum (MAX) Function
The MIN/MAX mode allows the user to view only
the lowest (MIN) or highest (MAX) readings.
Press the MAX/MIN button once and “MAX”
appears on the display. The LCD is now
displaying the maximum humidity in the top
display and the maximum reading of the selected
parameter in the bottom display. The display will
not change until a higher reading is registered.
Press the MAX/MIN button again and
“MIN”appears on the display.
The LCD is now displaying the minimum humidity and the minimum second
reading in the bottom display. The display will not change until a lower
reading is registered.
To exit the MIN/MAX mode, press and hold the MIN/MAX button for 2
seconds until the “MAX” or “MIN” icon disappears.
Note: Readings are automatically reset when switching from one
display to the next (MAX to MIN).
Backlight
Press and hold the light button ( ) until the backlight comes on. To
turn thebacklight off press and hold the light button ( ) until the
backlight turns off.
Automatic Power OFF
The meter has a default setting that automatically shuts the meter off after
10 minutes (indicated by the symbol on the display. This battery saving
feature can be disabled. To disable the auto power off function, simply
press and hold the hold button
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while powering on. The symbol will not appear when auto power off
has been disabled. The meter will revert to the default auto-off mode when
powered off.
Maintenance
Cleaning and storage
o The meter should be cleaned with a damp cloth and mild
detergent when necessary. Do not use solvents or abrasives.
p Store the meter in an area with moderate temperature and
humidity (refer to the operating and storage range in the
specifications chart earlier in this manual).
Battery Replacement
When the battery power falls low, the battery symbol will
appear on the LCD. Replace the 9 Volt battery by removing
the Philips head screw holding the rear battery compartment
cover to access the battery compartment. Ensure that the
compartment cover is securely fastened when finished.
You, as the end user, are legally bound (Battery ordinance)
to return all used batteries and accumulators; disposal in the
household garbage is prohibited!
You can hand over your used batteries / accumulators
at collection points in your community or wherever
batteries / accumulators are sold!
Disposal: Follow the valid legal stipulations in respect of the
disposal of the device at the end of its lifecycle
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Specifications
Function
Range and Resolution
Accuracy
Humidity
0.0 to 10.0%RH
±3%RH
10.0 to 90.0%RH
±2%RH
90.0 to 100.0%RH
±3%RH
Temperature
-30.0 to -20.0oC
+/-0.9°F (+/-0.5°C) (at
25°C)
+/-1.5°F (+/-0.8°C) at all
other ranges
-22.0 to – 4.0oF
-19.9 to 70.0oC
-3.9 to 158.0oF
70.1 to 100.0oC
158.1 to 199.0oF
Wet Bulb
0 to 80°C (32 to 176°F)
Calculated from RH and
air
Dew Point
-30 to 100°C (-22 to 199°F)
temperature
measurements
Display Dual LCD
Response Time: <30 seconds (90% of final value in moving air)
Operating Conditions 32 to 104
condensing
Storage Conditions -40 to 185
condensing
Power Supply 9 Volt battery
Battery Life Approx. 24 hours
Dimensions / Weight 8.9 x 1.7 x 1.3” (225 x 45 x 34mm); 7.0 oz
(200g)
o
F (0 to 40oC); < 80% RH non-
o
F (-40 to 85oC); <99% RH non-
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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
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