820 introduction safety information specifications operating
Contents
1. or OL is display Battery 1 5V x 4 PCS SIZE AAA UM 4 R03 Battery Life 200 hours typical with carbon zinc battery Reading Rate time per second Auto power off 15 minutes press power key to resume operation Dimensions 160mm H x 83mm W x 38mm D Weight Approx 230g including batteries Supplied Wire 4 feet type K thermocouple bead wire Teflon tape insulated Maximum insulation tempera ture 260 C 500 F Wire accuracy 2 2 C or 0 75 of reading whichever is greater from 0 C to 800 C Back Side 820U 820UW i 1 USB Port 2 DC power JACK 12V gt ee en ENVIRONMENTAL Ambient Operating Ranges 0 C to 50 C 32 F to 122 F lt 80 R H Storage Temperature 20 C to 60 C 4 F to 140 F lt 70 R H Wireless Features 820W 820UW Frequency range 910 920MHz Low current consumption less than 1mA The transmitting distance can reach 25M without magnetic interference OPERATING INSTRUCTIONS 1 CD Power Switch The cy key turns the thermometer on or off In the SET mode cannot be powered off Exit SET mode to power off APO function mode Press ly power key for more than 4 seconds to disable the auto power function The display will show APO OFF 2 C F Selecting the Temperature Scale Readings are displayed in either degrees Celsius C or degrees Fahrenheit F When the thermometer is turned on it is set to the temper2. MAX MIN key for more than 2 seconds to exit the MAX MIN function 6 HOLD Button Press the HOLD key to enter the data hold mode the HOLD annunciator is displayed at the center left of display When data hold mode is selected the meter held the present readings and stops all further measurements Press the HOLD key again to cancel data hold mode causing meter to resume taking measurements 7 WB DP Button In the NTC data Mode the Meter displays ambient temperature when first turned on To display wet bulb WB temperature press WB DP key once Press the WB DP again to switch to dew point DP tem perature Press WB DP a third time returns the Meter to ambient temperature 8 K NTC K DP Button Press the K NTC K DP key the meter can cycle through K TYPE NTC K DP X K DP K TYPE temperature minutes Dew point temperature 9 SAVE Button The save function stores the RH K TYPE NTC Wet bulb Dew point data in a nonvolatile memory Press the SAVE key to save the current data the word SAVE is displayed to indicate the data are saved The build in memory can store up to 256 data 10 READ A Y Button To recall the readings from memory press READ key To check the memorized data just to press A or Y until the desired memorized data is displayed To return the meter to normal operation press RE
3. SPECIFICATIONS ELECTRICAL Temperature Scale Celsius or Fahrenheit user selectable Measurement Range K TYPE 50 C to 1000 C 50 F to 1832 F Resolution 0 1 C or 0 2 F Accuracy Accuracy is specified for operating tempera tures over the range of 18 C to 28 C 64 F to 82 F for 1 year not including thermocouple error 0 1 rdg 1 C on 50 C to 1000 C 0 1 rdg 2 F on 50 F to 1832 F 0 05 rdg 1 4 F 58 F to 328 F Sensor Thermistor temperature sensor Range 0 C to 60 C 32 F to 140 F Resolution 0 1 C F Accuracy 2 C on 0 C to 10 C 0 5 C on 10 C to 45 C 2 C on 45 C to 60 C 4 F on 32 F to 50 F 1 F on 50 F to 113 F 4 F on 113 F to 140 F RELATIVE HUMIDITY Sensor Capacitive Humidity Sensor Range 0 to 100 RH Accuracy 2 5 at 25 C 77 F 10 to 90 RH 5 at 25 C 77 F 0 to 10 RH 90 to 100 RH Sensor Response Time for 90 of Total Range 60sec typical Sensor Hysteresis excursion of 10 to 90 to 10 RH 1 RH typical Temperature Coefficient 0 1 times the applicable accuracy specification per C from 0 C to 18 C and 28 C to 50 C 32 F to 64 F and 82 F tol22 F Input Protection 24V dc or 24V ac rms maximum input voltage on any combination of input pins Input Connector Accepts standard miniature thermo couple connectors flat blades spaced 7 9mm center to center GENERAL Display 5 digit liquid crystal display LCD Overload
4. AD key again X CLR SAVE DATA Pressing the A key for more than 5 seconds to clears all the saved data in memory And lower display show Clr about 2 second 11 WIRELESS MODE 820W 820UW Press the amp key for more than two seconds to start wireless function Press the G key again for another two seconds to stop wireless function The wireless mode will shut down if there is no wireless signal for two minutes To SET CH ID to 00 00 press the Y key and aay power key for more than 6 seconds with the meter pow ered down The meter will set channel and ID to 00 00 status The second display will show 00 which means that the channel and ID has been set to 00 To check the channel and ID of the meter When the meter is off press C F key and aly for 5 seconds LCD s main display will show channel number the second display will show ID number OPERATOR MAINTENANCE WARNING To avoid possible electrical shock disconnect the thermocouple connectors from the thermometer before removing the cover Battery Replacement 1 Power is supplied by 4pcs 1 5V SIZE AAA UM 4 RO3 2 The EEP appears on the LCD display when replace ment is needed To replace battery remove screw from back of meter and lift off the battery cover 3 Remove the battery from battery contacts and replace 4 When not use for long time remove battery 5 Don t keep in place with high Temp or high hu
5. OPERATING INSTRUCTIONS HYGRO THERMOMETER 820 820U USB amp DC Power 820W Wireless S20UW USB amp DC Power amp Wireless Main Display Second Display 9 REL HOLD REC AVG C2E MAX MIN gt WET BULB K DEW POINT Py S LMY 820 HYGRO THERMOMETER ga MAX MIN 820W 820UW CE Fe Third Display INTRODUCTION The instrument hereafter referred to as the Meter is a battery powered meter that measures relative humidity and temperature Through a few easy to use controls the Meter displays three different temperature points of the air sur rounding the meter s sensor ambient wet bulb and dew point SAFETY INFORMATION WARNING To avoid electrical shock do not use this instrument when working voltages at the measurement surface over 24V AC or DC WARNING To avoid damage or burns do not make temperature measurement in microwave ovens CAUTION Repeated sharp flexing can break the thermocouple leads To prolong lead life avoid sharp bends in the leads especially near the connector Do not immerse the hygrometer sensor head into liquids since this causes permanent damage to the sensor FEDERAL COMMUNICATIONS COMMISSION This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received in cluding interfe
6. ature scale that was in use when the thermometer was last turned off To change the temperature scale press the C F key 3 9 Button Press the soe key to trigger on the backlight func tion press the 30 key again to cancel the backlight function The backlight will switch off automatically after 30 seconds 4 REL Button Press the REL key to enter Relative mode zero the display and store the displayed Reading as a reference value and annunciator REL is displayed Press REL key again to exit the relative mode In this mode press HOLD key to stop reading all values are frozen press HOLD key again to restart reading 5 MAX MIN Button Press MIN MAX key to enter the MIN MAX re cording mode and REC shows on the display The beeper emits a tone when a new minimum or maximum measurement is recorded Press MIN MAX key again to cycle through the current readings MAX The highest measurement recorded MIN The lowest measurement recorded MAX MIN The difference of the highest and the low est measurement AVG The average values of the measurements Press MIN MAX key over two seconds to exit the function In this mode press HOLD key to stop re cording all values are frozen press HOLD key again to restart recording In this mode the APO function and other keys are disabled excluding HOLD and Back light keys Press and hold down the
7. midity Cleaning Periodically wipe the case with a damp cloth and deter gent do not use abrasives or solvents Software operation manual is on the software disk V1 121107
8. rence that may cause undesired operation NOTE This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection This equipment gener ates uses and can radiated radio frequency energy and if not installed and used in accordance with the instruc tions may cause harmful interference to radio commu nications However there is no guarantee that interfer ence will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turn ing the equipment off and on the user is encouraged to try to correct the interference by one or more of the fol lowing measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit dif ferent from that to which the receiver is connected Consult the dealer or an experienced radio TV techni cian for help Shielded interface cables must be used in order to com ply with emission limits Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment WIRELESS NOTE Wireless receiver must keep a distance at least 40cm from the meter and meter to meter distance must be at least 30cm
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