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Extech Instruments RH300, User Manual

The Extech Instruments RH300 is a high-quality digital hygro-thermometer designed to measure humidity and temperature levels with precision. Ensure optimal environmental conditions with this reliable device. User manuals for the RH300 are available for free download at 88.208.23.73:8080, providing step-by-step instructions for seamless operation.

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USER MANUAL

Digital Psychrometer

Models RH300 and RH305 (kit)

www.

.com

information@itm.com

1.800.561.8187

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Summary of Contents for RH300

Page 1: ...USER MANUAL Digital Psychrometer Models RH300 and RH305 kit www com information itm com 1 800 561 8187 ...

Page 2: ...tional probe Data Hold selectable Auto Power Off and MAX MIN Average reading Careful use of this meter will provide years of reliable service Meter Description 1 Humidity Sensor Air Temperature Sensor 2 Triple LCD Display 3 ON OFF button 4 T1 T2 Dew Point T1 button 5 F C select 6 MIN MAX RESET button 7 T2 DP Wet Bulb T2 button 8 HOLD button 9 T2 Probe Jack Note The battery compartment is located o...

Page 3: ...on to turn power on or off The meter will perform a short self test when turned on Taking Air Temperature and Humidity 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 T DP T1 button toggles the lower left display between T1 Air Temperature and DP Dew point measuremen...

Page 4: ...he display is now showing the maximum humidity and temperature readings in memory To exit the MIN MAX mode press the MnMx Reset button again and the MIN and MAX icons disappear To clear the current min max readings in memory press and hold the MnMx Reset button for more than two seconds Data Hold Press the HOLD button momentarily to freeze the displayed reading The HLD icon will appear on the uppe...

Page 5: ...ne hour Press and hold the C F button while powering the unit ON The unit enters calibration mode 32 8 flashes on the display The DP and Wb display areas show DP Wb C 6 Once the 33 calibration is complete the display stops flashing and a constant 32 8 is displayed 7 Allow the meter to remain ON and move it to the 75 salt bottle 8 Allow the meter to remain for one hour in the 75 salt bottle to stab...

Page 6: ...ers users are legally required to take used batteries to appropriate collection sites the retail store where the batteries were purchased or wherever batteries are sold Disposal Do not dispose of this instrument in household waste The user is obligated to take end of life devices to a designated collection point for the disposal of electrical and electronic equipment Other Battery Safety Reminders...

Page 7: ...se Time 60 seconds typical Dew Point 90 4 to 122 0o F 68 to 50o C calculated from RH and Air temperature measurements Wet Bulb 6 88 to 122 0o F 21 6 to 50o C calculated from RH and Air temperature measurements Operating Conditions 20 to 50o C 4 to 122o F 99 RH non condensing Storage Conditions 40 to 85o C 40 to 185o F 99 RH non condensing Power Supply 2 x 1 5V AAA batteries Battery Life Approx 80 ...

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