Extech Instruments RHT510-NIST User manual

EXTECH® USER MANUAL
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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

RHT510-en-GB_V1.0 5/17
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Introduction
Thank you for selecting the Extech Model RHT510. This hand-held device measures Relative
Humidity, Air temperature, Dew point temperature, Wet bulb temperature, and Type K
temperature (using external probe). This device is shipped fully tested and calibrated and, with
proper use, will provide years of reliable service. Please visit our website (www.extech.com) to
check for the latest version and translations of this User Manual, Product Updates, Product
Registration, and Customer Support.
Features
•Backlit LCD with Display Hold
•Light weight, ergonomic design with lanyard
•Displays Relative Humidity and Temperature (Air, Type-K, Dew point, and Wet bulb)
•Selectable temperature units C/F
•MAX-MIN Recording
•Tripod Mounting
•Battery operated
Safety
Please read the entire User Manual and Quick Start before operating this device. Use the meter
only as specified and do not attempt to service or open the meter housing. Do not allow children
to handle the meter. Please dispose of batteries and meter responsibly and in accordance with
all applicable laws and regulations.

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Specifications
Electrical Specifications (23±5°C)
Humidity/Air Temperature
Unit Range Resolution Accuracy
%RH 10 to 95 0.1 <70%: ±(4%RH)
≥70%: ±(4%rdg + 1.2%RH)
Temp oC 0 to 50 0.1 ±1.2oC
Temp oF 32 to 122 0.1 ±2.5oF
Type K Thermocouple (external probe)
Unit Range Resolution Accuracy*
Type K Temp oC
-50.0 to 1300.0 0.1 ±(0.4%rdg + 0.5 oC)
-50.1 to -100.0 0.1 ±(0.4%rdg + 1.0 oC)
Type K Temp oF
-58.0 to 2372.0 0.1 ±(0.4%rdg + 1.0 oF)
-58.1 to -148.0 0.1 ±(0.4%rdg + 1.8 oF)
*Accuracy spec. does not include additional error introduced by the external probe
Dew Point Temperature
oC -25.3 to 49.0 0.1 Calculation based on
humidity/temp values.
oF -13.5 to 120.0 0.1
Wet Bulb Temperature
oC -5.4 to 49.0 0.1 Calculation based on
humidity/temp values.
oF 22.2 to 120.0 0.1

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General Specifications
Display Backlit LCD 35 x 30mm (1.38 x 1.18”)
Measurements Humidity/Temp; Dew Point; Wet Bulb; Type K Temp.
Input Overload Display “----“
Tripod Mount On rear panel
Power 1.5V AAA batteries (3)
Power Consumption Approx. 5mA DC
Automatic Power Off After approx. 10 minutes of inactivity
Operating Temperature 0 to 50oC (32 to 122oF)
Operating Humidity 95% RH max
Storage Temperature -10 to 60oC (14 to 140oF)
Storage Humidity 10 to 75% RH
Dimensions/Weight 153 x 45 x 20mm (6.0 x 1.8 x 1.2”) /160g (5.64oz)
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com