Instruction Manual HI 8666 RH/°C Transmitter www.hannainst.
Dear Customer, Thank you for choosing a Hanna Instruments Product. Please read this instruction manual carefully before using the instrument. This manual will provide you with all the necessary information for the correct use of the instrument, as well as a precise idea of its versatility in a wide range of applications. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. This instrument is in compliance with the directives.
PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipment. If noticeable damage is found, immediately notify your Dealer. Note: Conserve all packing material until the instrument has been observed to function correctly because all defective items must be returned to the Dealer in their original packing. GENERAL DESCRIPTION HI 8666 is a 2-wire, 4 to 20 mA relative humidity and temperature transmitter.
FUNCTIONAL DESCRIPTION 1 2 3 1) Sintered Cap 2) Relative Humidity and Temperature Sensors 3) 11-Pin Connector
SPECIFICATIONS Range RH °C 0 (4 mA) to 100% (20 mA) -20 (4 mA) to 60°C (20 mA) Resolution RH °C ±0.125% RH, ±0.02 mA ±0.1°C, ±0.02 mA Accuracy RH ±2% RH (5 to 80% RH) ±4% RH (80 to 90% RH, 0 to 40°C) °C ±1% of span Typical EMC RH Deviation °C ±2.5% RH, ±0.4 mA ±1°C, ±0.
TERMINAL BOARD AND INSTALLATION The HI 8666 Transmitter has an 11-pin connector at the rear of the instrument. Connect it to a UNDECAL relay socket. The terminals are: 1 +°C: Positive Terminal; 9 -°C: Negative Terminal; 4 +RH: Positive Terminal; 7 -RH: Negative Terminal. Terminals 2, 3, 5, 6, 8, 10 and 11 are not connected. See the following figures for recommended installation: 1.
2. Passive and not isolated receivers (Common positive) RH% °C Receiver • + Receiver - - • • 4 1 •+ • + Power Supply RH% Transmitter °C Transmitter •- •7 - •9 • + - 3.
4.
CALIBRATION CHECKING PROCEDURE All Hanna relative humidity transmitters have been precalibrated at the factory. Hanna Instruments uses state-of-the-art thermal humidity chambers for this purpose. It is generally recommended to have all RH transmitter recalibrated at least once a year. For an accurate annual recalibration, contact your nearest Hanna Service Center. You can also check the status of your HI 8666 by using the Hanna mini-calibration chambers HI 7102.
When the salt has dissolved completely, add all the content of the second bottle of HI 7111. • Allow the solution obtained to cool, and then pour it into the chamber marked "RH 11.1%", making sure that no residue remains on the walls of the glass container. l Li C • Li Cl 11.1% Na Cl 75.
CHECKING THE RH CALIBRATION • Bring the calibration kit to a temperature of approximately 20°C. • Remove the sintered cap from the probe of HI 8666. • Connect the unit to a 12 to 24VDC power supply and hook up a multimeter (range of 20mA) in series with the circuit. Remove the cap from the "RH 11.1%" chamber containing the LiCl solution and insert the HI 8666 paying attention not to dip it into the liquid. • Li Cl 11.1% Na Cl 75.
• Wait for the measurement to stabilize (approximately 4h 4 hours) Insert the probe in the "RH 75.4%" chamber, the multimeter reading should be 16.06 mA: this represents the theoretical chamber value of 75.4% RH. 9 3 6 • mA • The relative humidity calibration checking procedure is complete. If the theoretical values are not within ±5%, contact your dealer or your closest Hanna Service Center for a fast and accurate recalibration.
CHECKING THE TEMPERATURE CALIBRATION • Remove the sintered cap from the probe of HI 8666. • Connect the unit to a 12 to 24VDC power supply and hook up a multimeter (range of 20mA) in series with the circuit. Place the HI 8666 into a stable temperature environment of 25°C, preferably a temperature chamber, and wait for the temperature to stabilize. Using a NIST certified thermometer as a reference, e.g. ChecktempC/N, verify that the ammeter reading is matching the temperature, e.g. 13.00 mA for 25°C.
TABLES FOR RH CHECKING Rh. Curr. Rh. Curr. Rh. Curr. Rh. Curr. Rh. Curr. .0000 .5000 1.000 1.500 2.000 2.500 3.000 3.500 4.000 4.500 4.000 4.080 4.160 4.240 4.320 4.400 4.480 4.560 4.640 4.720 .1000 .6000 1.100 1.600 2.100 2.600 3.100 3.600 4.100 4.600 4.016 4.096 4.176 4.256 4.336 4.416 4.496 4.576 4.656 4.736 .2000 .7000 1.200 1.700 2.200 2.700 3.200 3.700 4.200 4.700 4.032 4.112 4.192 4.272 4.352 4.432 4.512 4.592 4.672 4.752 .3000 .8000 1.300 1.800 2.300 2.800 3.300 3.800 4.300 4.
Rh. Curr. Rh. Curr. Rh. Curr. Rh. Curr. Rh. Curr. 30.00 30.50 31.00 31.50 32.00 32.50 33.00 33.50 34.00 34.50 8.800 8.880 8.960 9.040 9.120 9.200 9.280 9.360 9.440 9.520 30.10 30.60 31.10 31.60 32.10 32.60 33.10 33.60 34.10 34.60 8.816 8.896 8.976 9.056 9.136 9.216 9.296 9.376 9.456 9.536 30.20 30.70 31.20 31.70 32.20 32.70 33.20 33.70 34.20 34.70 8.832 8.912 8.992 9.072 9.152 9.232 9.312 9.392 9.472 9.552 30.30 30.80 31.30 31.80 32.30 32.80 33.30 33.80 34.30 34.80 8.848 8.928 9.008 9.088 9.
Rh. Curr. Rh. 60.00 60.50 61.00 61.50 62.00 62.50 63.00 63.50 64.00 64.50 Rh. Curr. 13.60 13.68 13.76 13.84 13.92 14.00 14.08 14.16 14.24 14.32 60.10 60.60 61.10 61.60 62.10 62.60 63.10 63.60 64.10 64.60 13.61 13.69 13.77 13.85 13.93 14.01 14.09 14.17 14.25 14.33 60.20 60.70 61.20 61.70 62.20 62.70 63.20 63.70 64.20 64.70 13.63 13.71 13.79 13.87 13.95 14.03 14.11 14.19 14.27 14.35 Curr. 60.30 60.80 61.30 61.80 62.30 62.80 63.30 63.80 64.30 64.80 Rh. 13.64 13.72 13.80 13.88 13.96 14.04 14.12 14.
Rh. Curr. Rh. 90.00 90.50 91.00 91.50 92.00 92.50 93.00 93.50 94.00 94.50 Rh. Curr. 18.40 18.48 18.56 18.64 18.72 18.80 18.88 18.96 19.04 19.12 90.10 90.60 91.10 91.60 92.10 92.60 93.10 93.60 94.10 94.60 18.41 18.49 18.57 18.65 18.73 18.81 18.89 18.97 19.05 19.13 90.20 90.70 91.20 91.70 92.20 92.70 93.20 93.70 94.20 94.70 18.43 18.51 18.59 18.67 18.75 18.83 18.91 18.99 19.07 19.15 Curr. 90.30 90.80 91.30 91.80 92.30 92.80 93.30 93.80 94.30 94.80 18.44 18.52 18.60 18.68 18.76 18.84 18.92 19.00 19.
TABLES FOR TEMPERATURE CHECKING Temp. Curr. Temp. Curr. Temp. Curr. Temp. Curr. Temp. Curr. -20.0 -19.5 -19.0 -18.5 -18.0 -17.5 -17.0 -16.5 -16.0 -15.5 4.000 4.100 4.200 4.300 4.400 4.500 4.600 4.700 4.800 4.900 -19.9 -19.4 -18.9 -18.4 -17.9 -17.4 -16.9 -16.4 -15.9 -15.4 4.020 4.120 4.220 4.320 4.420 4.520 4.620 4.720 4.820 4.920 -19.8 -19.3 -19.8 -18.3 -17.8 -17.3 -16.8 -16.3 -15.8 -15.3 4.040 4.140 4.240 4.340 4.440 4.540 4.640 4.740 4.840 4.940 -19.7 -19.2 -18.7 -18.2 -17.7 -17.2 -16.7 -16.
Temp. Curr. Temp. Curr. Temp. Curr. Temp. Curr. Temp. Curr. 10.00 10.50 11.00 11.50 12.00 12.50 13.00 13.50 14.00 14.50 10.00 10.10 10.20 10.30 10.40 10.50 10.60 10.70 10.80 10.90 10.10 10.60 11.10 11.60 12.10 12.60 13.10 13.60 14.10 14.60 10.02 10.12 10.22 10.32 10.42 10.52 10.62 10.72 10.82 10.92 10.20 10.70 11.20 11.70 12.20 12.70 13.20 13.70 14.20 14.70 10.04 10.14 10.24 10.34 10.44 10.54 10.64 10.74 10.84 10.94 10.30 10.80 11.30 11.80 12.30 12.80 13.30 13.80 14.30 14.80 10.06 10.16 10.26 10.
Temp. Curr. Temp. Curr. Temp. Curr. Temp. Curr. Temp. Curr. 40.0016.00 40.50 16.10 41.00 16.20 41.50 16.30 42.00 16.40 42.50 16.50 43.00 16.60 43.50 16.70 44.00 16.80 44.50 16.90 40.10 40.60 41.10 41.60 42.10 42.60 43.10 43.60 44.10 44.60 16.02 16.12 16.22 16.32 16.42 16.52 16.62 16.72 16.82 16.92 40.20 40.70 41.20 41.70 42.20 42.70 43.20 43.70 44.20 44.70 16.04 16.14 16.24 16.34 16.44 16.54 16.64 16.74 16.84 16.94 40.30 40.80 41.30 41.80 42.30 42.80 43.30 43.80 44.30 44.80 16.06 16.16 16.26 16.
ACCESSORIES HI 7102 HI 7111/P HI 7121/P HI 7164 HI 710011 Mini-calibration RH chamber, complete with O-ring and precalibrated saturated salts (LiCl and NaCl) Spare saturation salts 6 x 15 g bottles of LiCl for low range humidity calibration Spare saturation salts 6 x 33 g bottles of NaCl for high humidity calibration Undecal connector Sintered cap for RH probe 21
WARRANTY HI8666 is warranted for one year against defects in workmanship and materials when used for its intended purpose and maintained according to instructions. This warranty is limited to repair or replacement free of charge. Damages due to accidents, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact the dealer from whom you purchased the instrument.
CE DECLARATION OF CONFORMITY Recommendations for Users Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to correct interferences. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance.
MAN8666R2 06/02 w w w . h a n n a i n s t .
