User`s Manual - Reliability Direct, Inc.
Contents
1. e MAX top of LCD Max Hold function engaged for the Air Temperature function e HOLD top of LCD Data Hold function engaged for the Air Temperature function e PROBE TEMP Reminder that the top LCD digits represent Air Probe Temperature A Indicates that the laser pointer is on e IR TEMP Indicates that the larger LCD digits represent IR temperature measurement e MAX bottom of LCD Max Hold for the IR Temperature and RH function e HOLD bottom of LCD Data Hold for the IR Temperature function and RH function e C F Temperature units of measure e RH Relative Humidity unit of measure e Large LCD digits at center of display for Relative Humidity and IR Temperature e Smaller LCD digits at top right of display for Probe Temperature A Low battery indicator 4 RH101 V1 9 02 04 Operation Power Press the button to turn power on or off Probe Humidity and Temperature Measurements 1 Attach the probe to the meter via the jack at the top of the meter 2 Hold the probe in the area to be tested amp allow adequate time for readings to stabilize 3 Read the Relative Humidity center of LCD and Probe Temperature top of LCD NOTE Do not immerse the probe in liquid it is intended for use in air only InfraRed Non Contact Temperature Measurements 1 The IR sensor is located at the top of the meter 2 Point the sensor toward the surface to be measured 3 Press and hold the large red IR button to begin meas2. s circuitry translates this information into an LCD reading IR Field of View Ensure that the desired target is larger than the spot size as shown in the diagram below As the distance from an object increases the spot size of the area measured by the meter becomes larger The meter s field of view ratio is 8 1 meaning that if the meter is 8 inches from the target the diameter spot of the object under test must be at least 1 inch Other distances are shown below in the field of view diagram Distance to Object in inches Laser Beam l Diameter of Spot in inches Emissivity Most organic materials and painted or oxidized surfaces have an emissivity of 0 95 fixed setting in the model RH101 Inaccurate readings will result when measuring shiny or polished surfaces To compensate cover the surface under test with masking tape or flat black paint Allow time for the tape to reach the same temperature as the material underneath then measure the temperature of the tape or the painted surface 7 RH101 V1 9 02 04 Thermal Emissivity Table for Common Materials Material Emissivity Cloth black 0 98 Asphalt 0 90 to 0 98 Human skin 0 98 Concrete 0 94 Lather 0 75 to 0 80 Cement 0 96 Charcoal powder 0 96 Sand 0 90 Lacquer 0 80 to 0 95 Earth 0 92 to 0 96 Lacquer matt 0 97 Water 0 67 Rubber black 0 94 Ice 0 96 to 0 98 Plastic 0 85 to 0 95 Snow 0 83 Timber 0 90 Glass 0 85 to 1 00 Paper 0 70 to 0 94 Ceramic 0 90 to 0 94 Chromiu
3. Temperature and Relative Humidity 3 minutes Accuracy is specified for the following ambient temperature range 64 to 82 F 18 to 28 C 2 5 samples per second 0 95 fixed D S Approx 8 1 ratio D distance S spot Less than 1mW 6 to 14 um wavelength 32 to 122 F 0 to 50 C lt 80 RH non condensing 14 to 140 F 10 to 60 C lt 80 RH non condensing 9V Battery with auto power off after 10 minutes Approx 24 hours if Backlight and Laser are used continuously the battery life is reduced to 2 to 3 hours approx 5 9 x 2 8 x 1 4 150 x 72 x 35mm 8 3 oz 235g e Use extreme caution when the laser pointer beam is on e Do not point the beam toward anyone s eye or allow the beam to strike the eye from a reflective surface e Do not use the laser near explosive gases or in other potentially explosive areas 3 RH101 V1 9 02 04 Meter Description Humidity Air Temperature Probe Probe input jack Laser pointer IR Sensor Rubber holster LCD Display IR thermometer measurement button CONS Or RON cs IR and Relative Humidity function buttons 4 o Air Temperature function buttons 3 Probe holder Power ON OFF button Backlight button Oo eN N Note The battery compartment tilt stand tripod mount and probe holder removal screw are located on the rear of the instrument Display Layout MAX HOLD PROBE TEMP ID 100 ainni IR TEMP MAX HOLD
4. User s Guide EXTECH INSTRUMENTS Hygro Thermometer InfraRed Thermometer Model RH101 Patent Pending Introduction Congratulations on your purchase of the Extech Hygro Thermometer plus InfraRed Thermometer This device measures relative humidity air temperature with probe and surface temperature with the InfraRed function The large easy to read backlit LCD includes primary and secondary displays plus numerous status indicators The InfraRed feature includes a laser pointer for convenient targeting Careful use of this meter will provide years of reliable service Function Range and Resolution Accuracy Humidity 10 0 to 95 0 RH 3 5 RH Air Temperature 4 to 140 F 20 to 60 C 3 0 F 2 0 C IR Temperature 58 0 to 4 0 F 50 0 to 20 0 C 9 F 5 C 4 0 to 199 9 F 20 0 to 93 3 C 200 to 400 F 93 C to 204 C 2 of rdg or 4 F 2 C 400 to 932 F 204 C to 500 C 3 of rdg Specifications Display Dual LCD with Backlight and status indicators Sensor Type Humidity Precision capacitance sensor Response Time Accuracy note Sampling Rate InfraRed Emissivity IR Field of View Laser power IR Spectral Response Operating Conditions Storage Conditions Power Supply Battery Life Dimensions Weight Safety Temperature Thermistor probe and InfraRed IR Temperature 0 5 seconds Probe
5. button is released MAX Buttons Press the MAX button bottom of meter for Air Temperature center of meter for IR temperature and Relative Humidity to display only the highest reading The displayed measurement will now only change when a higher reading is detected Press the MAX button again to exit this mode 5 RH101 V1 9 02 04 Backlight Press the eat sal to turn the light on Press again to turn it off 6 RH101 V1 9 02 04 InfraRed Measurement Considerations e When taking IR measurements the meter automatically compensates for ambient temperature changes Note that it may take up to 30 minutes to adjust to extremely wide ambient changes e Low temperature measurements quickly followed by high temperature measurements may require several minutes to stabilize as a result of the IR sensor cooling process e If the surface of the object under test is covered with frost oil grime etc clean before taking measurements e If an object s surface is highly reflective apply masking tape or flat black paint before measuring e Steam dust smoke etc can obstruct measurements e To find a hot spot aim the meter outside the area of interest then scan across in an up and down motion until the hot spot is located IR Theory IR thermometers measure the surface temperature of an object The meter s optics sense emitted reflected amp transmitted energy that is collected and focused onto the meter s detector The meter
6. es Extech 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 a Support Hotline 781 890 7440 Tech support Ext 200 Email support extech com Repair Returns Ext 210 Email repair extech com Website www extech com Copyright 2003 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 9 RH101 V1 9 02 04
7. m oxides 0 81 Marble 0 94 Copper Oxides 0 78 Plaster 0 80 to 0 90 Iron Oxides 0 78 to 0 82 Mortar 0 89 to 0 91 Textiles 0 90 Brick 0 93 to 0 96 Maintenance Cleaning and storage 1 The meter should be cleaned with a damp cloth and mild detergent when necessary Do not use solvents or abrasives 2 Store the meter in an area with moderate temperature and humidity Battery Replacement The battery symbol appears on the lower right of the LCD when the 9V battery needs to be replaced Replace the 9V battery as follows 1 Turn the meter off and disconnect the air temperature probe 2 Remove the large flat head screw on the rear of the meter to remove the probe holder 3 Remove the rubber holster that surrounds the entire meter by pulling it over the top of the meter Remove the small Phillips head screw on the rear of the meter Open the battery compartment and replace the 9V battery Re assemble the meter before operating 8 RH101 V1 9 02 04 Calibration Cal A humidity calibration adjustment is located in the battery compartment Adjust 1 Remove the battery door and move the battery to one side 2 Place the humidity probe in a humidity chamber or humidity calibration bottle and wait 20 minutes 3 Turn the meter on and turn the adjustment until the humidity reading on the display agrees with the calibration source Battery Compartment Calibration and Repair Service
8. s Extech offers repair and calibration services for the products we sell Extech also provides NIST certification for most products Call the Customer Service Department for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on 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 at 781 890 7440 ext 210 for authorization or visit our website at www extech com click on Contact Extech and go to Service Department to request an RA number A Return Authorization RA number must be issued before any product is returned to Extech 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 Extech 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 damag
9. uring the surface temperature of a desired target IR TEMP and AA will appear on the display The laser pointer will switch on to help aim the meter 4 The measured IR surface temperature will appear at the center of the LCD larger digits The temperature displayed is the temperature of the area within the spot 5 When the red IR button is released the laser pointer will switch off and the reading will freeze data hold on the display for approximately 10 seconds 6 Note that the probe Air Temperature wand continues to monitor temperature during IR tests and its temperature is displayed on the top of the LCD smaller digits 7 After approx 10 secs the meter defaults to the Humidity and Air Temperature display Automatic Power OFF To conserve battery life the meter automatically shuts off after 10 minutes F C buttons The Air Temperature and the IR Temperature units can be selected by the user For Air Temperature press the F C button on the bottom left For the IR temperature units press the F C button at the center of the meter Data Hold Buttons Displays can be held frozen at any time by pressing the HOLD button For Air Temperature use the HOLD button on the bottom right For IR Temperature and for Relative Humidity use the HOLD button on the right center of the meter Press HOLD again to exit the mode Note that in IR temperature mode Data Hold is automatically engaged when the red IR
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