Industrologic, Inc. reserves the right to change any product's features, specifications, documentation, warranties, fee schedules, and conditions at any time and without notice.
Industrologic products are provided as printed circuit board level assemblies. Some Industrologic products may include mechanical packaging assessories which are provide for the purchaser's convenience, and are not intended to be final assembly enclosures.
Industrologic products are provided with the understanding that the purchaser will determine fitness for any particular application as well as achieve compliance with any particular specifications or regulations as required or desired for that application.
Industrologic's obligation under this Warranty is limited to replacement with a new or repaired unit to the original purchaser. The unit must be returned, and replacements obtained from Industrologic, Inc. or the Distributor or OEM from whom it was purchased.
This warranty will not apply if, in the judgment of Industrologic, Inc., damage or failure of the product has resulted from accident, alteration, misuse, abuse, connection to or operation with incompatible signals or power sources, or improper installation.
Under no circumstances shall Industrologic, Inc. be liable to purchaser or any third party for any loss of profits or other direct or indirect costs, expenses, losses, or consequential damages arising out of or as a result of any defects in or failure of Industrologic products or any part or parts thereof.
THIS WARRANTY IS IN LIEU OF ANY OTHER WARRANTY, EITHER EXPRESSED OR IMPLIED, AS TO DESCRIPTION, QUALITY, MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE OR USE, OR ANY OTHER MATTER.
Products must be returned by original purchaser with a Return Materials Authorization (RMA) number issued by Industrologic, Inc. or the Distributor or OEM from whom it was purchased, authorizing its return. Current repair or replacement fees and procedures will be related during the issue of the RMA number.
Warranty or repair units must be returned with postage and insurance paid by purchaser. Industrologic, Inc. is not responsible for damages or loss during shipment.
Power Supply Requirements:
Operating voltage: 8 to 18 volts DC regulated or unregulated
Operating current: 13mA at 9 volts
Voltage Output:
Maximum voltage range: 0 to +5 volts
Normal operating range: +0.5 to +4.5 volts
Maximum load impedance: 600 Ohms
Due to possible variations in wire color in the cable attached to the VSI-1000, it is recommended that the user remove the enclosure cover to identify the electrical connections on the printed circuit board adjacent to the screw terminals. From left to right the connections are Signal, Ground, and power supply Voltage.
Although the voltage output from the pressure transducer used by the VSI-1000 could be used directly to indicate pressure, the voltage span would be limited unless measurements were made over a large change in altitude. Therefore, the circuitry in the VSI-1000 was designed to increase this span and provide an offset adjustment to bring this span within the range of the current field elevation, and up to 1000 feet higher.
Due to non-linearities in the atmosphere versus pressure as well as non-linearities inherent in pressure transducers, the voltage output from the VSI-1000 versus altitude will not be a straight-line fit, but will be at some given point along a curve determined by the field elevation, atmospheric pressure, and temperature. The circuitry in the VSI-1000 was not designed to correct for these non-linearities, therefore, tables of altitude versus voltage are provided.
The VSI-1000 is not designed to be a "digital altimeter" when connected to an analog to digital converter and display system! A digital representation of the voltage, possibly having numerous decimal places, may imply a greater accuracy than actually exists.
The most accurate method of determining relative altitude is to work backward from the point where data logging has stopped and the VSI-1000 has returned to ground level. At this point the output voltage will represent the voltage associated with the current ground level, atmospheric pressure, and temperature. It is also likely that this point will be the closest reference to the time during which altitude and vertical speed were of most importance.
Although the pressure sensor used in the VSI-1000 is internally temperature compensated, temperature changes in the atmosphere always result in pressure changes. Therefore, a large temperature change during operation of the VSI-1000 will result in some change of the output.
Since the pressure sensor used in the VSI-1000 obtains its pressure changes from a thin silicon diaphragm, the pressure sensor responds to sound, vibration, and acceleration as well as pressure. This response will cause noticable variations in the voltage output during certain events of this nature, and should be taken into consideration when interpreting the voltage output.
Output AGL Altitude in feet when Field Elevation in feet is: Voltage 0000 1000 2000 3000 4000 5000 6000 feet/volt 250 259 269 279 291 303 316 0.50 0 0 0 0 0 0 0 0.60 25 26 27 28 29 30 32 0.70 50 52 54 56 58 61 63 0.80 75 78 81 84 87 91 95 0.90 100 104 108 112 116 121 127 1.00 125 130 134 140 145 152 158 1.10 150 155 161 168 174 182 190 1.20 175 181 188 196 203 212 222 1.30 200 207 215 223 233 242 253 1.40 225 233 242 251 262 273 285 1.50 250 259 269 279 291 303 316 1.60 275 285 296 307 320 333 348 1.70 300 311 323 335 349 364 380 1.80 325 337 349 363 378 394 411 1.90 350 363 376 391 407 424 443 2.00 375 389 403 419 436 455 475 2.10 400 415 430 447 465 485 506 2.20 425 440 457 475 494 515 538 2.30 450 466 484 503 523 545 570 2.40 475 492 511 531 552 576 601 2.50 500 518 538 559 581 606 633 2.60 525 544 565 587 610 636 665 2.70 550 570 591 615 640 667 696 2.80 575 596 618 642 669 697 728 2.90 600 622 645 670 698 727 759 3.00 625 648 672 698 727 758 791 3.10 650 674 699 726 756 788 823 3.20 675 699 726 754 785 818 854 3.30 700 725 753 782 814 848 886 3.40 725 751 780 810 843 879 918 3.50 750 777 806 838 872 909 949 3.60 775 803 833 866 901 939 981 3.70 800 829 860 894 930 970 1013 3.80 825 855 887 922 959 1000 1044 3.90 850 881 914 950 988 1030 1076 4.00 875 907 941 978 1017 1061 1108 4.10 900 933 968 1006 1047 1091 1139 4.20 925 959 995 1034 1076 1121 1171 4.30 950 984 1022 1061 1105 1152 1203 4.40 975 1010 1048 1089 1134 1182 1234 4.50 1000 1036 1075 1117 1163 1212 1266 Note: This table is based on a range adjustment to 0.5 volts and standard atmospheric conditions. Feet MSL Output Voltage when Field Elevation in feet is: Altitude 0000 1000 2000 3000 4000 5000 6000 volts/ft .00400 .00386 .00372 .00358 .00344 .00330 .00316 0 0.50 0.50 0.50 0.50 0.50 0.50 0.50 25 0.60 0.60 0.59 0.59 0.59 0.58 0.58 50 0.70 0.69 0.69 0.68 0.67 0.66 0.66 75 0.80 0.79 0.78 0.77 0.76 0.75 0.74 100 0.90 0.89 0.87 0.86 0.84 0.83 0.82 125 1.00 0.98 0.97 0.95 0.93 0.91 0.90 150 1.10 1.08 1.06 1.04 1.02 1.00 0.97 175 1.20 1.18 1.15 1.13 1.10 1.08 1.05 200 1.30 1.27 1.24 1.22 1.19 1.16 1.13 225 1.40 1.37 1.34 1.31 1.27 1.24 1.21 250 1.50 1.47 1.43 1.40 1.36 1.33 1.29 275 1.60 1.56 1.52 1.48 1.45 1.41 1.37 300 1.70 1.66 1.62 1.57 1.53 1.49 1.45 325 1.80 1.75 1.71 1.66 1.62 1.57 1.53 350 1.90 1.85 1.80 1.75 1.70 1.66 1.61 375 2.00 1.95 1.89 1.84 1.79 1.74 1.69 400 2.10 2.04 1.99 1.93 1.88 1.82 1.76 425 2.20 2.14 2.08 2.02 1.96 1.90 1.84 450 2.30 2.24 2.17 2.11 2.05 1.99 1.92 475 2.40 2.33 2.27 2.20 2.13 2.07 2.00 500 2.50 2.43 2.36 2.29 2.22 2.15 2.08 525 2.60 2.53 2.45 2.38 2.31 2.23 2.16 550 2.70 2.62 2.55 2.47 2.39 2.32 2.24 575 2.80 2.72 2.64 2.56 2.48 2.40 2.32 600 2.90 2.82 2.73 2.65 2.56 2.48 2.40 625 3.00 2.91 2.82 2.74 2.65 2.56 2.48 650 3.10 3.01 2.92 2.83 2.74 2.65 2.55 675 3.20 3.11 3.01 2.92 2.82 2.73 2.63 700 3.30 3.20 3.10 3.01 2.91 2.81 2.71 725 3.40 3.30 3.20 3.10 2.99 2.89 2.79 750 3.50 3.40 3.29 3.19 3.08 2.98 2.87 775 3.60 3.49 3.38 3.27 3.17 3.06 2.95 800 3.70 3.59 3.48 3.36 3.25 3.14 3.03 825 3.80 3.68 3.57 3.45 3.34 3.22 3.11 850 3.90 3.78 3.66 3.54 3.42 3.31 3.19 875 4.00 3.88 3.75 3.63 3.51 3.39 3.27 900 4.10 3.97 3.85 3.72 3.60 3.47 3.34 925 4.20 4.07 3.94 3.81 3.68 3.55 3.42 950 4.30 4.17 4.03 3.90 3.77 3.64 3.50 975 4.40 4.26 4.13 3.99 3.85 3.72 3.58 1000 4.50 4.36 4.22 4.08 3.94 3.80 3.66 Note: This table is based on a range adjustment to 0.5 volts and standard atmosperic conditions.
Adjusting the range of the VSI-1000 is done in the following manner:
1. Connect the voltage output signal to a digital voltmeter or other accurate voltage measuring device. This device could also be the data logging device used to read the unit during data logging.
2. Apply power to the unit and allow at least one minute for the pressure sensor to stabilize due to internal heat changes.
3. Using a very small flat-bladed screwdriver to turn the adjustment "screw", adjust the voltage output to 0.500 volts or as close as possible to that value. (This adjustment screw is a trimmer potentiometer that can be rotated up to 25 turns clockwise or counterclockwise. When the limits of rotation are reached the device simply allows the screw to continue turning, so there is no need for concern about damage from over-rotation.) An alternate method of adjustment may be used that uses the LED (light) that is visible through the screw adjustment hole, and does not require a method of measuring the voltage output signal:
Instead of turning the adjustment screw in response to the voltage output, turn the adjustment screw counterclockwise until the LED turns on, and then turn it clockwise just past the point where the LED goes off. The voltage output will then be very close to 0.5 volts.
After performing the range adjustment on the VSI-1000, the adjustment
hole can be covered if desired to prevent dust and dirt from entering
the unit. As long as there is at least a small area somewhere on the
enclosure that is open to the atmosphere, the VSI-1000 will work properly.
Do not use tape to seal all of the seams of the enclosure from dust and
dirt.
Since pressure transducers are affected by vibration and sound, the VSI-1000 can be enclosed in foam padding to minimize these effects if they are found to be a problem. In addition to indicating altitude/vertical speed, the VSI-1000 can also be used to specifically detect these events if they are sufficiently large, although the variations in the voltage output will simply be observable as "events" and will not reflect any particular signal strength.
end of manual