ETG38
MANUAL
Indoor Thermo-Hygrometer with external thermo probe
Model: THW301
INSTRUCTION MANUAL
Congratulations on your purchasing of this new Thermo-Hygrometer. This unique product is
designed for everyday use for the home or office and is a definite asset of great use. To fully
benefit from all the features and understand the correct operation of this product, please read this
instruction manual thoroughly.
FUNCTIONS OF THE THERMO-HYGROMETER
This thermo-hygrometer measures temperature and humidity of the environment of its surrounding
area and measures the outdoor temperature through its external thermo probe.
A
B
C
D
E
F
F
G
I
H
FEATURES: MAIN UNIT
A. Hot alert icon
The Hot alert icon will be turned on if the Heat Index is 32C or higher
B. Wet icon
The Wet icon will be turned on if the humidity is higher than 70%.
C. Dry icon
The Dry icon will be turned on if the humidity is lower than 40%.
D. Comfort icon
The comfort icon will be turned on if the humidity is in the range of 40% ~ 70% and
temperature is in the range of 20C ~ 25C.
E. Low battery indicator
Appears when the battery is running dry and the temperature/humidity measured by this unit is
no longer reliable. The user must change the batteries at once.
F. In/Out temperature indicator
Turn on ‘ ’ icon while the indoor temperature is displayed. Turn on ‘ ’ icon while the
external probe temperature is displayed.
G. Maximum /minimum temperature record
Indicates the maximum/minimum temperature is displayed.
H. Maximum /minimum humidity record
Indicates the maximum/minimum humidity is displayed.
DESCRIPTION OF BUTTONS
THW301 has 3 major side buttons
1. [IN-OUT]
Press once to toggle the display of the indoor temperature to the probe temperature. Press
again to enable the auto-scroll function that will display the indoor temperature and the probe
temperature alternately for 5 seconds.
2. [MEM]
Press shortly to toggle for maximum, minimum or current temperature and humidity reading.
Press and hold 2 seconds to clear the maximum and minimum records.
3. [HEAT]
Press to toggle the display for indoor humidity and indoor heat index.
C/F slide switch and[RESET] button inside the battery compartment
4. [C/F]
Slide switch to C or F position to select temperature reading in Celsius or Fahrenheit
5. [RESET]
To activate system reset to the main unit during abnormal condition which will reset all settings
back to factory values
BATTERY INSTALLATION
1. Remove the battery door;
2. Insert 1 pieces AAA size 1.5V alkaline battery as indicate by the polarity;
3. Close the battery door.
Note: Replace the battery when the low battery indicator appears on the top corner of the
LCD.
HEAT INDEX FUNCTION
The heat index is an index that combines air temperature and relative humidity to determine an
apparent temperature — how hot it actually feels. The human body normally cools itself by
perspiration, or sweating, in which the water in the sweat evaporates and carries heat away from
the body. However, when the relative humidity is high, the evaporation rate of water is reduced.
This means heat is removed from the body at a lower rate, causing it to retain more heat than it
would in dry air. Press [HEAT] button to switch the display from humidity reading to the heat index.
The ‘Hot’ alert icon will be turned on if the heat Index is 32C or higher. That means there are
possible to cause sunstroke, heat cramps, and heat exhaustion if a man continues to expose
himself in such environment for a long period.
Specifications
Displayed IN temperature range : -10°C to +60.0°C (14°F to 140.0°F)
Proposed operating range : 0°C to +50.0°C (32.0°F - 122.0°F)
Temperature resolution : 0.1°C (0.2°F)
Displayed Heat Index range : 27C to 59C for temperature from 27°C to 49°C
and humidity from 25% to 95%
Displayed Relative Humidity range : 25%RH to 95%RH
External probe temperature measurement
Displayed OUT temperature range : -50.0°C to +60.0°C (-58.0°F to 140.0°F)
Temperature resolution : 0.1°C (0.2°F)
Batteries : Use 1 pieces UM-4 AAA size 1.5V alkaline battery
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