Introduction Portable Meters Transmitter Probes RELATIVE HUMIDITY

Transcription

1 S E C T I O N 10 C O N T E N T S N A V I G A T I O N Introduction Portable Meters Transmitter Probes

2 10 Hygrometers: Relative Humidity Measurement An Introduction to Relative Humidity and HANNA Hygrometers Definition The hygrometer is an instrument used to measure relative humidity (RH), that is, the quantity of water vapor present in the air. Hygrometers are often available in versions that also measure temperature these are normally called thermo-hygrometers. Relative humidity is expressed as the ratio of the quantity of water vapor present in the air to the quantity at which the air would reach saturation (100%) at a given temperature. Accurate and Efficient RH Measurement HANNA is one of the few manufacturers offering a wide range of relative humidity (RH) meters. Calibration is performed at the factory using state-of-the-art humidity chambers and tuned at 3 different points (14%, 50%, 80%) traceable against a NIST standard. Each model has been designed around certain field applications and environments. HI 8064, for example, is a portable, easy-to-use thermo-hygrometer particularly suited for education. HI is a hand-held meter with a built-in sensor that has a sintered cap for protection against dusty or harsh environments. This product is ideally suited to the HVAC field. HI 9064 and HI 9065 with their water-resistant housing, remote probe and HOLD feature are the perfect meters for libraries, museums, computer rooms and printing facilities. HI 9161 is a relative humidity and temperature meter that can provide measurement printouts on the spot. Printouts can be obtained at user selectable intervals that contain information such as sample #, interval, R.H. and temperature reading. The meter can operate at 60 minute intervals over an entire weekend. If necessary, it can also be plugged into a 12 Vdc adapter for extended periods of printing. It is often necessary to transfer data to a computer. This would normally require a serial port and long cables for the connection. HANNA has incorporated a unique system into the data logging HI meter. Infrared lights at the bottom of the meter allow instant transmission of data into the HI 9200 infrared transmitter without cables. The HI 9200 comes complete with an RS232 connector and cable to be connected to a computer. Besides these models with a capacitive sensor, HANNA presents the new HI 9564 and HI 9565 with resistive sensor. These new hygrometers are ideal for greenhouse and nursery applications where temperature ranges are not high and the relative humidity range is narrow. In addition, the probe stores the calibration data and is interchangeable with other hygrometers. HI 9565 also measures the dew point. The HI 8666 compact transmitter can transmit both relative humidity and temperature signals. Principle of Operation The measurement system is made up of a meter connected to a probe. The probe measures capacitance, a capacitor with a polymer or plastic dielectric material with a fixed dielectrical constant from 2 to 15. Increased humidity causes the dielectric to dilate, hence distancing the plates with consequent variation of the capacitor's geometry and reduction of its capacitance. These capacitance variations in turn cause a frequency change in the instrument's electronics, resulting in a frequency modulation which is a function of relative humidity. The frequency is then converted into voltage, which is converted into a relative humidity value displayed on the LCD. The hygrometers precision essentially depends on how insusceptible it is to the following three factors: the first is the linearity error caused by the typical non-linearity of RH sensors. HANNA hygrometers compensate for the effects of this error. It is advisable, however, to calibrate the meter periodically to reduce the probability of this error reoccurring. The second factor is the "temperature error" caused by the variation of the hygroscopic properties of the sensor's dielectric material as a function of temperature. In fact, the ratio between the quantity of water vapor present in the dielectric and the relative humidity is not directly proportional, but varies with temperature. The third factor is the "calibration error" caused by an incorrect calibration procedure. There are many "do-it-yourself" calibration kits on the market. Most are made of a receptacle containing two sealed chambers and two different types of salt. It is possible to simulate a particular RH value by filling each chamber with the correct distilled water and salt solution. Calibration The RH probe is first immersed in the low RH chamber and allowed to stabilize. The meter is then calibrated at the RH value of the chamber being used. The procedure is repeated with the high RH chamber. Since RH is dramatically affected by temperature changes, kits do not provide accurate calibration due to the practical difficulties in performing the calibration at a constant temperature. Climatic chambers that simulate different humidity levels are the ideal solution to calibrate hygrometers accurately. Hygrometers are also calibrated using two different levels of relative humidity in this calibration procedure, and then the accuracy is checked by simulating other RH values in the chamber. HANNA service centers are equipped with state-of-the-art calibration chambers to provide for the highest accuracy. HANNA Service Relative humidity calibration is a very delicate process that requires special equipment and trained personnel. HANNA now offers service contracts for all relative humidity meters. This supplies the user with the confidence that the meter is operating at 100% all of the time. Ask your dealer or the nearest HANNA office for more details. Dew Point The dew point is defined as the temperature to which air must be cooled in order for condensation (saturation) to occur. The dew point is dependent on the concentration of water vapor present, and therefore, the relative humidity. HI 9565 not only measures relative humidity, but automatically measures and displays the dew point as well With Great Products, Come Great Results

3 HI 9161 HI Printing and Logging Thermo-Hygrometers Store up to 8,000 Readings 10 Print and Log Right in the Field HI 9161 and HI are advanced portable, printing, thermo-hygrometers. These unique, rugged meters give instant printouts of sample #, date and time of readings, printing interval, relative humidity and temperature at userselectable intervals. R.H. and temperature measurements have a 0.1 resolution. HI combines the high accuracy and portability of HI 9161 with extensive printing and logging features and an infrared RS232 data transfer system. In addition to supplying the user with R.H. and temperature at the touch of a button, the HI data logging capabilities store information for transfer to a PC or for retrieval and/or printing at a later date. Sophisticated software allows up to 8,000 readings to maximize available space, regardless of logging interval. The HI 9200 infrared transmitter is available as an optional accessory. HI 70604/5, RH probe with a 5m (16.5') cable is also available for special applications. SPECIFICATIONS HI 9161C HI 9161F HI 91610C HI 91610F Range RH 5.0 to 95.0% 5.0 to 95.0% 5.0 to 95.0% 5.0 to 95.0% Temperature to 60.0 C -4.0 to F to 60.0 C -4.0 to F Resolution 0.1% RH / 0.1 C 0.1% RH. / 0.1 F 0.1% RH / 0.1 C 0.1% RH / 0.1 F Precision ±2% RH / ±0.4 C ±2% RH. / ±1 F ±2% RH / ±0.4 C ±2% RH / ±1 F Probes RH Calibration HI 70604/2 RH probe with 2 m (6.6 ) cable (included) and HI 762L/2 temperature probe with 2 m (6.6 ) cable (included) manual, 2-point, through trimmer on the RH probe Both models are available in two versions, for C or F readings. HI 9200 optional infrared PC transmitter available Store up to 8,000 readings Rugged housing Built-in Printer low-consumption, plain paper 38 mm (1.5 ) large (HI ) Printing Interval selectable at 1, 2, 5, 10, 15, 30, 60, 120 and 180 minutes Logging Interval 1, 2, 5, 10, 15, 30, 60, 120, 180 minutes PC Connection Power Supply through serial port RS232 with HI 9200 IR interface (4) 1.5V AA batteries/ approx. 500 hours of use (with 60 minutes printing interval); auto-off after 5 minutes of non-use; or 12 Vdc input Environment 0 to 50 C (32 to 122 F); RH max 98% non-condensing Dimensions 220 x 82 x 66 mm (8.7 x 3.2 x 2.6 ) 550 g (1.2 lbs.) Food Industry Where certain food manufacturing and preservation processes have to be at a specific humidity level. HI 9161C and HI 91610C, RH % and C readings, are supplied with HI 70604/2 RH probe with 2 m (6.6 ) cable, HI 762L/2 temperature probe with 2 m (6.6 ) cable, batteries, paper rolls (5), rugged carrying case and instructions HI 9161F and HI 91610F, RH % and F readings, are supplied with HI 70604/2 RH probe with 2 m (6.6 ) cable, HI 762L/2 temperature probe with 2 m (6.6 ) cable, batteries, paper rolls (5), rugged carrying case and instructions. ELECTRODES HI 70604/2 RH probe, 2 m (6.6 ) cable HI 70604/5 RH probe, 5 m (16.5 ) cable HI 70606/2 RH probe with sintered cap and 2 m (6.6 ) cable HI 70606/5 RH probe with sintered cap and 5 m (16.5 ) cable HI 762L/2 Temperature probe, 2 m (6.6 ) cable ACCESSORIES HI 7101 Calibration chamber for probes without sintered cap HI 7102 Calibration chamber for probes with sintered cap HI 7111/P LiCl RH calibration salts for low humidity calibration, 15 g (6) HI 7121/P NaCl RH calibration salts for high humidity calibration, 33 g (6) HI 9200/9 IR interface for PC connection HI Windows compatible software HI Paper roll (10) HI Ink cartridge (1) HI Rugged carrying case

4 10 HI 9064 HI 9065 Rugged Hygrometer with Water Resistance Heavy-duty Field Meters HI 9064 and HI 9065 are heavy-duty hygrometers specifically designed for field applications such as greenhouse management and HVAC systems. They are housed in a rugged waterresistant case to provide maximum protection in the field. The relative humidity probe contains a thin-film polymer sensor, which quickly performs all RH readings to 98% accuracy. The "HOLD" button will instantly freeze the reading on the LCD. HI 9065 can also measure temperature with an internal sensor in the RH probe from 0 to 60 C as well as 32 to 140 F scales. SPECIFICATIONS HI 9064 HI 9065 Range Resolution RH 5.0 to 95.0% Temperature RH 0.1% Horticulture & Floriculture Where the growth rate in greenhouses is highly dependent on humidity levels. 0.0 to 60.0 C (32 to 140 F) up to 150 C (302 F) with HI 765 temperature probe Temperature 0.1 C (1 F) You can also connect a separate temperature probe for gas and liquid measurements (HI 765 series). Standard 2 m (6.6 ) cable allows monitoring in hard to reach areas HOLD key to freeze readings on the display Rugged housing Built-in temperature sensor Accuracy RH ±2% Temperature ±0.4 C (±1 F) (excluding probe error) RH Calibration manual, 2-point, through trimmer on the RH probe Probe HI 70608/2, with 2 m (6.6 ) cable (included) HI 70605/2, with built-in temperature sensor & 2 m (6.6 ) cable (included) Battery Type / Life (4) 1.5V AA / approx. 500 hours of continuous use Environment 0 to 50 C (32 to 122 F); RH max 100% Dimensions 196 x 80 x 60 mm (7.7 x 3.1 x 2.4 ) 500 g (1.1 lbs.) HI 9064 is supplied for HI70608/2 RH probe, 1.5V AA batteries (4) and rugged carrying case. HI 9065 is supplied with HI70605/2 RH probe, 1.5V AA batteries (4) and rugged carrying case. ELECTRODES HI 70608/2 RH probe, 2 m (6.6 ) cable HI 70608/5 RH probe, 5 m (16.4 ) cable HI 70605/2 RH probe with internal temperature sensor and 2 m (6.6 ) cable HI 70605/5 RH probe with internal temperature sensor and 5 m (16.5 ) cable HI 7111/P LiCl RH calibration salts for low humidity calibration, 15 g (6) HI 7121/P NaCl RH calibration salts for high humidity calibration, 33 g (6) HI 765A Temperature probe for air measurement ACCESSORIES HI 7101 Calibration chamber for probes without sintered cap HI Rugged carrying case HI 7101 Calibration Chamber HI 7111/P LiCl Salts 10.4 With Great Products, Come Great Results

5 HI 9564 HI 9565 Data-logging Thermo-Hygrometers with Dew Point 10 RH, Temperature and Dew Point on Backlit Display HI 9564 and HI 9565 are two new portable thermo-hygrometers designed to provide excellent performance in harsh environments and poorly lit areas. In addition to RH and temperature, HI 9565 will display the dew point with the press of a button. The dew point indicates the presence of water vapor in the air at a given temperature. With this feature HI 9565 permits useful and rapid environmental monitoring where a controlled microclimate is necessary, like greenhouses, museums, clean rooms and laboratories. HI 7062 RH probe features a built-in microchip that can store calibration data. When the probe is connected to another hygrometer, the microchip transfers the stored calibration data and eliminates the need to recalibrate the instrument. Both instruments feature auto-off after 20 minutes of inactivity, temperature readings in Celsius and Fahrenheit, and on-line help to indicate anomalies and direct procedures. HOLD key to freeze readings on the display Backlit LCD Auto shut-off Built-in temperature sensor SPECIFICATIONS HI 9564 HI 9565 RH 20.0 to 95.0% 20.0 to 95.0% Range Temperature 0.0 to 60.0 C / 32 to F 0.0 to 60.0 C / 32 to F Dew Point to 60.0 C / -4.0 to F RH 0.1% RH 0.1% RH Resolution Temperature 0.1 C / 0.1 F 0.1 C / 0.1 F Dew Point 0.1 C / 0.1 F Accuracy Probe RH ±3 % RH (50 to 85 % RH & 15 to 40 C); ±5% RH (outside) ±3 % RH (50 to 85 % RH & 15 to 40 C); ±5% RH (outside) Temperature ±0.5 C / ±1 F ±0.5 C / ±1 F Dew Point ±2 C /±4 F (50 to 85 % RH & 15 to 40 C); ±4.5 C /±9 F (outside) HI RH combined probe with built in temperature sensor and microchip, 1 m cable (included) Libraries & Museums Where the monitoring of humidity levels is essential to guarantee the preservation of works of art. Battery Type / Life Environment HI 9564 and HI 9565 are supplied with HI RH probe, battery, instruction manual and blue protective case. (1) 9V / approx. 250 hours of use; auto-off after 20 minutes of non-use. 0 to 60 C (32 to 140 F); RH max 98% non-condensing Dimensions 164 x 76 x 45 mm (6.5 x 3 x 1.8 ) ELECTRODES HI g (12 oz.) RH probe with temperature sensor, 1 m (3.3 )

6 10 HI Compact Thermo-Hygrometer with Built-in Sensor One Hand Operation HI is a compact, portable and versatile hygrometer that monitors relative humidity, anywhere. This simpleto-use meter is ideal for the HVAC field The built-in thin-film capacitance sensor assures accurate humidity measurements from 5 to 95% RH with a resolution of 0.1%. The rubber keypad protects the keyboard from dust and accidental splashes. A sintered cap can be placed on the sensor shaft for protection in dusty environments. If faster response is desired, the cap can be removed. Designed to be operated with just one hand, the compact housing fits easily in your palm. For better instrument protection, use HANNA s optional shockproof rubber boot (shown). Portability and simplicity Low battery indicator Dual temperature range Shown with HANNA s optional protective rubber boot (HI ) SPECIFICATIONS HI Ranges Resolution Accuracy Battery Type / Life Environment RH 5.0 to 95.0% Temperature 0.0 to 60.0 C ; 32 to 140 F RH 0.1% Temperature 0.1 C; 1 F RH ±2% Temperature ±0.4 C; ±1 F (excluding probe error) (1) 9V / approx. 100 hours of continuous use 0 to 50 C; RH max 98% non-condensing Dimensions 190 x 80 x 38 mm (7.5 x 3.1 x 1.5 ) 200 g (7.1 oz.) HI is supplied with 9V battery ACCESSORIES HI HI 7102 Probe sintered cap Calibration chamber for probes with sintered cap HI 7111/P HI 7121/P HI HI HI LiCl RH calibration salts for low humidity calibration, 15 g (6) NaCl RH calibration salts for high humidity calibration, 33 g (6) Blue Shockproof rubber boot Orange Shockproof rubber boot Rugged carrying case Heating & Air-Conditioning In the construction and maintenance of heating and air-conditioning plants With Great Products, Come Great Results

7 HI 8666 Relative Humidity and Temperature Compact Transmitter 10 Compact and can be used with or without filter This solid-state transmitter plugs into its wall-mounted receptacle for on-site, continuous monitoring of relative humidity and temperature in critical or controlled environments. The HI 8666 has an excellent accuracy of ±2% RH and ±1% C. Each 4-20 ma analog signal can be sent to remote panel meters, controllers or data acquisition systems. The signals are to be powered by separate external voltage sources. Equipped with a removable sintered cap, the HI 8666 sensor is well protected for the long run against the ingress of dust or unclean environments. With the sintered cap installed, the life of the sensor and the instrument is prolonged and less maintenance is required. This is ideal in some applications, such as food and industry where reliability rather than response time is the primary objective. With the sintered cap removed, the sensor s response time is faster but it is no longer protected from dust or debris. Removable sintered metal cap Dual-range transmitter Can be quickly removed for maintenance with minimal downtime SPECIFICATIONS HI 8666 Range Precision RH temperature RH temperature 0% (4 ma) to 100% (20 ma) -20 C (4 ma) to 60 C (20 ma) ±2% (5% to 95% RH) ±1% F.S. Response Time 6 seconds without sintered cap; 60 seconds with sintered cap HI 7102 Calibration Chamber Power Supply Vdc Environment 0 to 60 C Panel Cutout 73 x 42 mm (2.9 x 1.6 ) Dimensions 79 x 49 x 150 mm (3.1 x 1.9 x 5.9 ) 150 g (5.3 oz.) HI 7111/P LiCl Salts HI 8666 is supplied with sensor protective cap, mounting brackets and instructions ACCESSORIES HI Probe sintered cap HI 7102 HI 7111/P HI 7121/P Calibration chamber for probes with sintered cap LiCl RH calibration salts for low humidity calibration, 15 g (6) NaCl RH calibration salts for high humidity calibration, 33 g (6)

8 10 Accessories for Relative Humidity Relative Humidity Probe HANNA humidity probes utilize a high-tech Thin-Film Polymer Capacitance (TFPC) humidity sensor. This sensor enables rapid response and high accuracy. Several different versions are available for your specific needs. For rapid response, HANNA recommends a probe with a perforated cap. For industrial environments with dust and powders, HANNA recommends a probe with a sintered cap. Configuration A Description ABS body with perforated cap 25 mm 165 mm B ABS body with sintered cap 25 mm 178 mm C ABS body with perforated cap 170 mm 17 mm PROBE CONFIG. CABLE LENGTH PROBE LENGTH CONNECTOR SENSORS USED WITH HI 70601/2 A 2 m (6.6 ) 165 mm (6.5 ) DIN RH (TFPC) & C HI 70601/5 A 5 m (16.5 ) 165 mm (6.5 ) DIN RH (TFPC) & C HI C 1 m (3.3 ) 170 mm (6.5 ) DIN RH (resistive) & C HI 70604/2 A 2 m (6.6 ) 165 mm (6.5 ) screw-type RH (TFPC) HI 70604/5 A 5 m (16.5 ) 165 mm (6.5 ) screw-type RH (TFPC) HI 8064, HI 8564 (included) HI 8064, HI 8564 (optional) HI 9564, HI 9565 (included) HI 9161, HI (included) HI 9161, HI (optional) HI 70605/2 A 2 m (6.6 ) 165 mm (6.5 ) screw-type RH (TFPC) & C HI 9065 (included) HI 70605/5 A 5 m (16.5 ) 165 mm (6.5 ) screw-type RH (TFPC) & C HI 9065 (optional) HI 70606/2 B 2 m (6.6 ) 178 mm (7.0 ) screw-type RH (TFPC) HI 70606/5 B 5 m (16.5 ) 178 mm (7.0 ) screw-type RH (TFPC) HI 9161, HI (optional) HI 9161, HI (optional) HI 70607/2 B 2 m (6.6 ) 178 mm (7.0 ) screw-type RH (TFPC) & C HI 9065 (optional) HI 70607/5 B 5 m (16.5 ) 178 mm (7.0 ) screw-type RH (TFPC) & C HI 9065 (optional) HI 70608/2 A 2 m (6.6 ) 165 mm (6.5 ) screw-type RH (TFPC) HI 9064 (included) HI 70608/5 A 5 m (16.5 ) 165 mm (6.5 ) screw-type RH (TFPC) HI 9064 (optional) 10.8 With Great Products, Come Great Results