Extech Instruments RHT510 Manuel utilisateur

USER MANUAL

Hygro-Thermometer

Model RHT510

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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 ( ) 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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Meter Description

1. Air Temperature/Humidity Sensor

2. Type K Temperature Probe Input

3. LCD Display

4. ON-OFF button

5. ▲ button

6. Mode button

7. Backlight button

8. SET and ▼button

9. Record button (MAX-MIN)

10. Display Hold button

Note: Battery compartment and tripod mount on back of meter

LCD Description

1. Type K Temperature Icon

2. Function Icons

3. MAX-MIN Record Icon

4. MAX Display Icon

5. MIN Display Icon

6. Display Hold Icon

7. Battery Status Indicator

8. Auto Power OFF (APO)

9. Primary Display

10. Secondary Display

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Operation

Basic Use

1. Short press the power button to power the meter. If the LCD does not switch on, check

the batteries located in the rear battery compartment.

2. Place the sensor in the testing environment.

3. View the measurement on the meter’s display.

4. To power OFF the meter, short press the button.

Mode Selection

Press the Mbutton to select the mode of operation. The meter has four (4) modes: Relative

Humidity %, Dew point temperature, Wet bulb temperature and Type K temperature (external

probe required). Release the Mbutton to make a selection.

Display Hold

Short press the Hbutton to freeze or unfreeze a reading on the display. The Display Hold and

APO functions are not operational in record mode.

LCD Backlight

The LCD is equipped with backlighting for easier viewing, especially in dimly lit areas. Press the

backlight button to turn the backlight on. The backlight will automatically turn off after 10

seconds.

Type K Measurement

Insert the optional Type K temperature probe into the Type K temperature probe socket (left

side of meter). Use the mode (M) button to set the mode of operation to Type K temperature

and view the readings on the display.

MAX-MIN Recording

The meter records the maximum and minimum values over time.

Note: Display Hold, Auto Power OFF setup, and the Power button do not function in Record

mode.

1. Press the Rbutton to enter the Record mode. The record icon will appear on the

display. The maximum and minimum values will be recorded and updated during the

measurement period.

2. Press the Rbutton to display the maximum value recorded over time. The icon and

maximum value will appear on the display.

3. Press the R button to display minimum value recorded over time. The icon and minimum

value will appear on the display.

4. Press the Hbutton to reset the recorded data. The previously recorded MAX-MIN readings

will be cleared and the meter will start recording new MAX-MIN readings.

5. Long press the Rbutton to exit the record mode.

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Auto Power OFF Control

In order to conserve battery life, the meter will automatically shut off after approximately 10

minutes of inactivity. The APO icon appears in the display when APO is selected.

To set APO ON or OFF as the default condition:

1. Long press SET button to enter APO mode. The bottom display will show ‘PoFF’.

2. Press the ▲or ▼button to turn the APO ON (YES) or APO OFF (NO).

3. Press the Rbutton to save the selection.

4. Wait approximately 10 seconds for the meter to return to normal operation.

Temperature Units Selection (C/F)

1. Long press SET button. The bottom display will show ‘PoFF’.

2. Press the Rbutton. The bottom display will show t-CF’.

3. Press the ▲or ▼button to select C or F.

4. Press the Rbutton to save the selection.

5. Wait approximately 10 seconds for the meter to return to normal operation.

Maintenance

Battery Replacement

1. Power OFF the meter.

2. Remove the flat head screw that secures the battery compartment at the back of the

meter.

3. Open the battery compartment and replace the 3 AAA batteries observing correct polarity.

Re-assemble the meter before use.

Safety: Please dispose of batteries responsibly; never dispose of batteries in a fire, batteries may

explode or leak. If the meter is not to be used for 60 days or more, remove the batteries and store

separately.

Never dispose of used batteries or rechargeable batteries in household waste.

As consumers, 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.

Cleaning and Storage

Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or

solvents.

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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)

ISO 9001 Certified

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