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Safety Information …………………………………………… 4 2-1 Cautions ………………………………..………..… 4 2-2 Safety Symbols ………………………..…..……… 4 3. Specifications……………………………………...…………. 5 4. Operation Instructions……………………………………… 6 4-1 Unit Diagram ……………………………………… 6 4-2 Measuring Procedure ……………………….…... 7 4-3 Humidity & Temperature Measurement ..……… 7 4-4 DEW Point Measurement .…………….………… 7 4-5 Data Hold ……………………....………………… 7 4-6 Data Record (MAX/MIN) ………………………… 7 4-7 Auto Data Logger ………………………………… 7 4-8 Manual Data Logger ……………………………... 8 5. Advanced Measuring Procedures ………………………. 9 5-1 Change Unit of Measure from °C to °F …….… 9 5-2 Change Data Logger Sampling Time ………… 9 5-3 Show Memory Balance ………………………… 9 5-4 Clear Memory …………………………………… 10 6. Auto Power Off Disable …………………………………… 10 7. SendDatafromRS232Socket …………..…………………. 11 8. RS232 PC Serial Interface Information ………………… 11 9. Battery Replacement ..…………………………………….. 12 9. Service Information …………………………………..……. 13 10. Warranty Information ………………………………………. 14 To see all available accessories and downloadable software, please visit 1. Product Introduction 1-1 Features . Humidity, Temperature and Dew Point measurements . 0.01 Resolution for Temperature and RH measurements . Fast response time . High level of accuracy . Large LCD display . Two year warranty 1-2 Applications . Science Experiments . HVAC . Plant Maintenance . Manufacturing . Agriculture . Quality Control 3 2. Safety Information Read the following safety information carefully before attempting to operate or serv ice the meter. Only qualified personnel should perform repairs or serv icing not cov ered in this manual. 2-1 Cautions! .DO NOT submerge the products mentioned in this manual in water or any other ty pes of liquids. .This product is not designed for use in medical applications. The product can only be used to measure body temperature simply for reference. 2-2 Safety Symbols Dangerous, refer to this manual before using the meter. Conforms to requirements of European Union and European Fare Trade Association (EFTA). Battery lev el is low. Don’t dispose this product as unsorted municipal waste. This instrument conforms to the following standards: EN61326: Electrical equipment for measurement, control and laboratory use. IEC61000-4-2: Electrostatic discharge immunity test. IEC61000-4-3: Radiated, radio-frequency, electromagnetic field immunity test. IEC61000-4-8: Power frequency magnetic field immunity test. 4 5. Specifications Display 5 Digit LCD with bar graph indicator Unit of Measurement Humidity: %RH (Relative Humidity) Temperature: °C or °F Dew Point: °C or °F Temperature Compensation Automatic for humidity function Sampling Time of Data Logger Manual Pushing the data logger button once will save data one time Auto 1, 2, 10, 30, 60, 600, 1800, 3600 seconds Humidity /Temperature Humidity Range 0% to 95% RH Resolution 0.01% RH Accuracy >70%RH +(3% rdg. + 1% RH) <70%RH -3%RH +3%RH Temperature Range 32°F to 122°F, (0°C to 50°C) Resolution 0.01 degree Accuracy °C = + 0.8°C / °F= + 1.5°F Dew Point °C Range -25.3°C to 48.9°C Resolution 0.01°C °F Range -13.5°F to 120.1°F Resolution 0.01°F Dew Point Accuracy sum of RH and Temperature accuracies Data Hold Display freeze Memory Saves MAX. or MIN values with recall Sampling Time Approximately 0.8 seconds Power Off Auto or manual control Data Output RS-232 Serial data output Operating Environment 32° to 122°F (0° to 50°C), <85% R.H. Power Supply 6 Pieces of DC 1.5V Batteries (UM4, AAA or equivalent) Weight (approx.) 0.74lbs. (336g) Dimensions (approx.) Main instrument: 6.9 x 2.7 x 1.7" (174 x 68 x 42mm) Sensor probe length: 7.8" (197mm) Included Accessories Instruction manual, battery, carrying case * = Note : Accuracy applicable in environments with RFI <3V/M with Hz <30MHz, and temperatures between 20°C to 26°C Specifications and information are subject to change without notice Please visitthe mostcurrentproduct information. 5 4. Operation Instructions TheH300couldtakeas longastenminutesforthedisplaytocompletely“settle” anddisplay the actual temperature or relative humidity level if the meter is exposed to two vastly different environments. The sensors used to make the environmental measurements must have time to acclimate to the test environment. 4-1 Unit Diagram Fig. 1 4-1 LCD Display 4-9 RS232 Socket 4-2 Power button 4-10 Probe Input Socket 4-3 Hold Button (ESC Button) 4-11 Probe Plug 4-4 REC Button (Enter Button) 4-12 Probe Head (Humidity & Temp.) 4-5 Function Button (Send Button) 4-13 Probe Handle 4-6 Set Button (Logger Button) 4-14 DC 9V Adapter Input Socket 4-7 Battery Compartment 4-15 Battery Cover Screw 4-8 Stand 4-16 Tripod Screw Mount 6 4-2 Measuring Procedure The H300 default unit of measure is °C. To switch to °F see section 5-1. The sampling time default for data logging is set at 2 seconds. To change this sampling time see section 4-7. 4-3 Humidity & Temperature Measurement 1. Plug the “ Probe Plug” (4-...