User`s Guide Hygro-Thermometer + InfraRed Thermometer Model
Contents
1. The meter 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 10 12 1 25 Diameter of Spot in inches 1 5 6 RH101 en GB_V3 2 4 15 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 Turn the meter off and disconnect the air temperature probe Remove the large flat head screw on the rear of the meter to remove the probe holder 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 oar wn gt Re assemble the2. 0 RH 3 5 RH Air Temperature 20 to 60 C 4 to 140 F 2 0 C 3 0 F IR Temperature 50 0 to 20 0 C 58 0 to 4 0 F 5 C 9 F 20 0 to 93 3 C 4 0 to 199 9 F 93 C to 204 C 200 to 400 F 2 of rdg or 2 C 4 F 204 C to 500 C 400 to 932 F 3 of rdg Display Sensor Type 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 Patent Notice Emissivity Dual LCD with Backlight and status indicators Humidity Precision capacitance sensor Temperature Thermistor probe and InfraRed IR Temperature 0 5 seconds Probe Temperature and Relative Humidity 3 minutes Accuracy is specified for the following ambient temperature range 18 to 28 C 64 to 82 F 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 0 to 50 C 32 to 122 F lt 80 RH non condensing 10 to 60 C 14 to 140 F 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 150 x 72 x 35mm 5 9 x 2 8 x 1 4 235g 8 3 oz U S Patent 7168316 Most organic materials and painted or oxidized surfaces hav
3. EXTECH User s Guide INSTRUMENTS Hygro Thermometer InfraRed Thermometer Model RH101 CE 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 Safety 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 2 RH101 en GB_V3 2 4 15 Meter Description Humidity Air Temperature Probe Probe input jack Laser pointer IR Sensor Rubber holster LCD Display IR thermometer measurement button CO NO OF oR INS IR and Relative Humidity function buttons 4 o Air Temperature function buttons 3 Probe holder Power ON OFF button Backlight button k ak Oo aN N Note The battery compartment tilt stand tripod mount and probe holder removal screw are located on the rear of the instrument 3 RH101 en GB_V3 2 4 15 Display Layout MAX HOLD PROBE TEMP IC
4. Woo LI IR TEMP MAX HOLD 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 en GB_V3 2 4 15 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 l
5. arge red IR button to begin measuring 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 approx 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 en
6. e 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 8 RH101 en GB_V3 2 4 15 Thermal Emissivity Table for Common Materials Material Emissivity Asphalt 0 90 to 0 98 Concrete 0 94 Cement 0 96 Sand 0 90 Earth 0 92 to 0 96 Water 0 67 Ice 0 96 to 0 98 Snow 0 83 Glass 0 85 to 1 00 Ceramic 0 90 to 0 94 Marble 0 94 Plaster 0 80 to 0 90 Mortar 0 89 to 0 91 Brick 0 93 to 0 96 Cloth black 0 98 Human skin 0 98 Lather 0 75 to 0 80 Charcoal powder 0 96 Lacquer 0 80 to 0 95 Lacquer matt 0 97 Rubber black 0 94 Plastic 0 85 to 0 95 Timber 0 90 Paper 0 70 to 0 94 Chromium oxides 0 81 Copper Oxides 0 78 Iron Oxides 0 78 to 0 82 Textiles 0 90 Copyright 2011 2014 FLIR Systems Inc All rights reserved including the right of reproduction in whole or in part in any form 1SO 9001 Certified www extech com 9 RH101 en GB_V3 2 4 15
7. gaged when the red IR 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 Backlight Press the backlight button to turn the light on Press again to turn it off 5 RH101 en GB_V3 2 4 15 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
8. meter before operating 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 Other Battery Safety Reminders o Never dispose of batteries in a fire Batteries may explode or leak o Never mix battery types Always install new batteries of the same type WARNING To avoid electric shock do not operate the meter until the battery cover is in place and fastened securely NOTE If your meter does not work properly check the fuses and batteries to make sure that they are still good and that they are properly inserted 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 7 RH101 en GB_V3 2 4 15 Specifications Function Range and Resolution Accuracy Humidity 10 0 to 95
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