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NOTE:
Please keep away from children and do not use it for safety related applications.
SPECIFICATIONS:
• Relative Humidity (Tamb=73±9°F (23±5°C)): 1~99%, accuracy: ±3% from 20~80%, otherwise ±5%
• Dry bulb temperature (DBT):-4~150°F (-20~65°C), accuracy: ±4.5°F (±2.5°C)
• Wet bulb temperature (WBT): -4~150°F (-20~65°C), accuracy: ±4.5°F (±2.5°C)
• Battery Life: 40 hours continuous use. The battery life on the shelf is 8 months
• Battery: one CR2032 lithium cell battery
• Dimensions: 2.2 x 2.1 x 1.7” (54.9 x 52.6 x 43 mm)
• Weight: 1.2 oz (35 g)
DIGITAL THERMOMETER/HYGROMETER INSTRUCTIONS:
1. Power ON: Press ON/OFF key (2) to power on the device. After power on, the device will start to measure ambient
temperature and relative humidity (RH Mode). (Figure 1)
NOTE: The digital thermometer/hygrometer will automatically turn off after 4 ½ minutes.
2. RH / DBT / WBT: Press Mode key (4) to switch RH / DB / WB. (Figure 2)
3. °C / °F: Press °C/°F key (3) to switch °C/°F. (Figure 3)
4. Sync data to a mobile device via Bluetooth® wireless technology.
Figure 1
Figure 2
Figure 3
MASTERCOOL APP
1. Press the ON/OFF key to power on the device. Download the Mastercool Connect app to a mobile
device from the App Store or Google Play.
2. Press °C/°F key (3) on the digital thermometer/hygrometer for 3 sec. to turn on Bluetooth® wireless
technology. (Figure 4)
3. Launch the Mastercool Connect app on the mobile device.
4. Touch “SEARCH” on the Mastercool Connect app. From the list of available devices, pick the digital
thermometer/hygrometer.
5. Clamp the digital thermometer/hygrometer on the air conditioner outlet and the readout from the
digital thermometer/hygrometer will be displayed on the Mastercool Connect app.
Figure 4
NOTE:
For maximum battery life, turn unit off after using Bluetooth® wireless technology.
NOTE:
Incompatibility issues may arise due to changes passed down from Apple® and Android™ platforms. Mastercool
will continually monitor and update our app software. Please contact Mastercool with any connectivity issues. Mastercool
will not warranty claims based on app incompatibilities.
POWER OFF
1. Device will automatically power off if left idle for more than 4 min and 30 sec to extend battery life.
2. Manually power off the device by pressing ON/OFF Key (2) for 3 sec.
NOTE:
When Bluetooth® wireless technology is connected, the digital thermometer/hygrometer will not automatically
shut down.
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