Extech RHT510 Instruction Manual

Hygro-Thermometer

Model RHT510

USER MANUAL

Additional User Manual Translations available at www.extech.com

2

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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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

Mode Selection

Press the M button 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 M button to make a selection.

Display Hold

Short press the H button 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.

button.

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 R button to enter the Record mode. The

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

2. Press the R button to display the maximum value recorded over time. The

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 H button 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 R button to exit the record mode.

record icon will appear on the

icon and

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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 R button 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 R button. The bottom display will show t-CF’.

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

4. Press the R button 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)

Temp oC 0 to 50 0.1 ±1.2oC

Temp oF 32 to 122 0.1 ±2.5oF

≥70%: ±(4%rdg + 1.2%RH)

Type K Thermocouple (external probe)

Unit Range Resolution Accuracy*

Type K Temp oC

Type K Temp oF

*Accuracy spec. does not include additional error introduced by the external probe

Dew Point Temperature

o

C -25.3 to 49.0 0.1 Calculation based on

o

F -13.5 to 120.0 0.1

-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)

-58.0 to 2372.0 0.1 ±(0.4%rdg + 1.0

-58.1 to -148.0 0.1 ±(0.4%rdg + 1.8 oF)

humidity/temp values.

o

F)

Wet Bulb Temperature

o

C -5.4 to 49.0 0.1 Calculation based on

o

F 22.2 to 120.0 0.1

humidity/temp values.

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General Specifications

Display Backlit LCD 1.38 x 1.18” (35 x 30mm)

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 32 to 122oF (0 to 50oC)

Operating Humidity 95% RH max

Storage Temperature 14 to 140oF (-10 to 60oC)

Storage Humidity 10 to 75% RH

Dimensions/Weight 6.0 x 1.8 x 1.2” (153 x 45 x 20mm) /5.64oz (160g)

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Warranty

FLIR Systems, Inc. warrants this Extech Instruments brand device to be free of defects in parts and workmanship for one year

from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the
instrument for service during or beyond the warranty period, contact the Customer Service Department for authorization. Visit
the website www.extech.com for contact information. A Return Authorization (RA) number must be issued before any product is
returned. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit.
This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of
specification, improper maintenance or repair, or unauthorized modification. FLIR Systems, Inc. specifically disclaims any implied
warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or
consequential damages. FLIR’s total liability is limited to repair or replacement of the product. The warranty set forth above is
inclusive and no other warranty, whether written or oral, is expressed or implied.

Calibration, Repair, and Customer Care Services

FLIR Systems, Inc. offers repair and calibration services for the Extech Instruments products we
sell. We offer NIST traceable calibration for most of our products. Contact our Customer Service
Department for information on calibration service availability. Annual calibrations should be
performed to verify meter performance and accuracy. Technical support and general customer
service is also provided, refer to the contact information provided below.

Support Lines: U.S. [phone]; International: [phone]

Technical Support: Option 3; E-mail: [e-mail]

Repair & Returns: Option 4; E-mail: [e-mail]

Product specifications are subject to change without notice

Please visit our website for the most up-to-date information

www.extech.com

FLIR Commercial Systems, Inc., 9 Townsend West, Nashua, NH 03063 USA

ISO 9001 Certified

Copyright © 2017 FLIR Systems, Inc.

All rights reserved including the right of reproduction in whole or in part in any form

www.extech.com

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Garantie

FLIR Systems, Inc. garantit que cet appareil Extech Instruments est exempt de défauts matériaux et de fabrication pendant un

an à partir de la date d’envoi (une garantie limitée de six mois s’applique aux capteurs et aux câbles). Si le renvoi de l’appareil
pour réparation devient nécessaire durant ou après la période de garantie, contactez le service client pour autorisation. Pour
obtenir les coordonnées, visitez le site Web suivant : www.extech.com. Un numéro d’autorisation de retour (AR) doit être délivré
avant tout retour de produit. L’expéditeur prend à sa charge les frais d’expédition, le fret, l’assurance et l’emballage correct de
l’appareil afin de prévenir toute détérioration durant le transport. Cette garantie ne s’applique pas aux dommages imputables à
l’utilisateur, tels que l’usage impropre ou abusif, un mauvais câblage, une utilisation non conforme aux spécifications, un
entretien ou une réparation incorrecte, ou toute modification non autorisée. FLIR Systems, Inc. déclinera spécifiquement toute
garantie ou qualité marchande ou aptitude à l’emploi prévu, et ne sera en aucun cas tenu responsable pour tout dommage
conséquent, direct, indirect ou accidentel. La responsabilité totale de FLIR est limitée à la réparation ou au remplacement du
produit. La garantie définie ci-dessus est inclusive et aucune autre garantie, écrite ou orale, n’est exprimée ou implicite.

Calibrage, réparation et services après-vente

FLIR Systems, Inc. offre des services de calibrage et de réparation pour les produits Extech
Instruments que nous commercialisons. Nous offrons l’étalonnage traçable NIST pour la plupart de
nos produits. Contactez notre service clientèle pour obtenir des informations sur la disponibilité
des services d'étalonnage. Un calibrage doit être effectué chaque année pour vérifier les
performances et la précision du mètre. Nous offrons également une assistance technique et un
service à la clientèle. Veuillez vous reporter aux coordonnées fournies ci-dessous.

Lignes d’assistance: États-Unis [phone]; international: [phone]

Service d’assistance technique : Option 3 ; E-mail : [e-mail]

Réparations et retours : Option 4 ; E-mail : [e-mail]

Les spécifications produit sont sujettes à modifications sans préavis.

Pour les toutes dernières informations, veuillez visiter notre site Web.

www.extech.com

FLIR Commercial Systems, Inc., 9 Townsend West, Nashua, NH 03063 USA

Certifié ISO 9001

Copyright © 2017 FLIR Systems, Inc.

Tous droits réservés, y compris la reproduction partielle ou totale sous quelque forme que ce soit.

www.extech.com

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Garantía

FLIR Systems, Inc., garantiza este dispositivo marca Extech Instruments para estar libre de defectos en partes o mano de obra

durante un año a partir de la fecha de embarque (se aplica una garantía limitada de seis meses para cables y sensores). Si fuera
necesario regresar el instrumento para servicio durante o después del periodo de garantía, llame al Departamento de Servicio a
Clientes para obtener autorización. Visite www.extech.com para Información de contacto. Se debe expedir un número de
Autorización de Devolución (AD) antes de regresar cualquier producto. El remitente es responsable de los gastos de embarque,
flete, seguro y empaque apropiado para prevenir daños en tránsito. Esta garantía no se aplica a defectos resultantes de las
acciones del usuario como el mal uso, alambrado equivocado, operación fuera de las especificaciones, mantenimiento o
reparación inadecuada o modificación no autorizada. FLIR Systems, Inc., rechaza específicamente cualesquier garantías
implícitas o factibilidad de comercialización o idoneidad para cualquier propósito determinado y no será responsable por
cualesquier daños directos, indirectos, incidentales o consecuentes. La responsabilidad total de FLIR está limitada a la
reparación o reemplazo del producto. La garantía precedente es inclusiva y no hay otra garantía ya sea escrita u oral, expresa o
implícita.

Servicios de calibración, reparación y atención a clientes

FLIR Systems, Inc., ofrece servicios de reparación y calibración para los productos que vendemos
de Extech Instruments. Ofrecemos calibración rastreable a NIST para la mayoría de nuestros
productos, para información sobre la disponibilidad del servicio de calibración por favor llame a
nuestro Departamento de Servicio al Cliente.
Para verificar el funcionamiento y precisión se debe realizar la calibración anual. Además se provee
Soporte Técnico y servicios generales al cliente, consulte la información de contacto en seguida.

Líneas de soporte: EE.UU. [phone]; Internacional: [phone]

Soporte Técnico Opción 3; correo electrónico: [e-mail]

Reparación / Devoluciones: Opción 4; correo electrónico: [e-mail]

Las especificaciones del producto están sujetas a cambios sin aviso

Por favor visite nuestra página en Internet para la información más actualizada

www.extech.com

FLIR Commercial Systems, Inc., 9 Townsend West, Nashua, NH 03063 USA

Certificado ISO 9001

Copyright © 2017 FLIR Systems, Inc.

Reservados todos los derechos, incluyendo el derecho de reproducción total o parcial en cualquier medio

www.extech.com

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