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Electronic Copy of LTI’s Impulse User’s Manual 8

Edition © October 1998

trailing characters, numeric values, delimiting
character, checksums, maximum line length, data
rate, and bit format are followed exactly.

As required by NMEA 0183, the CR400-format
does not respond to unrecognized header formats,
malformed messages, or messages with invalid
checksums.

Queries

The data you wish to download must appear in the
display window. If it does not, scroll to the
appropriate option. A CR400-format query
message from the download device to the Impulse
is in this general format:

$PLTIT,RQ,

datatype

<CR><LF>

where:

$PLTIT,RQ,

identifies this as a CR400-format request
message.

datatype

identifies the type of data you are
requesting. Legal values:

ID = Instrument version number
HV = Horizontal vector
HT = Height data (Impulse 200 only)
RD = Range difference
RC = Range cumulative

<CR><LF>

is a carriage return/line feed

combination.

If the optional NMEA query checksum is used, the
Impulse will ignore it.

Содержание IMPULSE LR

Страница 1: ...IMPULSE IMPULSE LR...

Страница 2: ...he product resulting from accident disaster misuse abuse or non LTI modification of the product To activate your warranty return the warranty card from the front of this manual to LTI within 30 days o...

Страница 3: ...e LTI shall not be held responsible if any LTI authorized dealer has been advised of the possibility of such damages or for any claim by any other party Note The Warranty Validation Card at the front...

Страница 4: ...Electronic Copy of LTI s Impulse User s Manual 8th Edition October 1998...

Страница 5: ...er device however it is recommended that you avoid staring into the transmit aperture for prolonged periods while firing the laser Never attempt to view the sun through the scope Looking at sun throug...

Страница 6: ...simply by sighting your target through the scope and briefly pressing one of three buttons conveniently located at your fingertips This manual covers the options characteristics and operation of these...

Страница 7: ...LS 15 SETTING UP FOR LEFT HANDED OPERATION 18 SWITCHING THE HAND STRAP 18 RECONFIGURING THE BUTTON PANELS 19 TAKING A BASIC MEASUREMENT 20 UNGROUPING SENSORS IMPULSE 200 22 SETTING THE SCOPE DOT INTEN...

Страница 8: ...5 Queries 55 Download Messages 56 CR400 FORMAT 57 NMEA Compliance 57 Queries 58 Download Messages 59 SPECIFIC MESSAGE FORMATS 60 Version ID 61 Basic Measurement Horizontal Vector 62 Range Difference 6...

Страница 9: ...d that it all arrived undamaged Basic Impulse Package Impulse laser instrument Belt clip Hand strap Two AA batteries User s manual Padded carrying case Accessories In addition you may have ordered one...

Страница 10: ...n inserting into and extracting from the battery compartment The diameter of the battery tube on your Impulse was chosen carefully to allow easy in out of normal AA batteries with no excess room for c...

Страница 11: ...start at the instrument however power on and off by using the buttons depicted in the illustrations at the right Power on by pressing the rear most button the button closest to you on either button pa...

Страница 12: ...pared to take a horizontal distance measurement The slope distance indicator SD will appear on the Impulse 100 The F means the measurement will be taken in feet An M in this location would mean the me...

Страница 13: ...ched beep and displays something like this RIGHT HD F DNLD The large number in the center of the display is the distance to the target DNLD in the lower right quadrant means the number is available at...

Страница 14: ...sensors are integrated with software controls and accessed through the two 3 button panels on either side of the unit and a liquid crystal display LCD screen on the rear panel Sensors The Impulse las...

Страница 15: ...u chose The single power sighting scope features an in scope red aiming dot to help you aim accurately to the target You can vary the intensity of the dot to account for different lighting conditions...

Страница 16: ...instrument by pressing the Fire or Fire2 button and keep the button pressed down This is also a good way for you to check if all the components on your display are working properly The display will l...

Страница 17: ...of the target object VD Vertical Distance Impulse 200 only Measures the distance between a target object and the perpendicular to the path of the horizontal distance SD Slope Distance Measures the st...

Страница 18: ...rgets that are at or beyond the window s minimum distance and at or within the window s maximum distance G Gate option is on S Short gate is set increasing the minimum measuring distance L Long gate i...

Страница 19: ...icator Function Explanation LASER Laser The laser sensor is firing BATT Battery Flashing Time to replace the batteries DNLD Download Measurement is available for download Down Arrow Flashing Impulse 2...

Страница 20: ...Selects Impulse operating characteristics RIGHT LEFT Right or Left Right or left button panel is primary BORE Bore Sight Aligns the red dot or crosshair in the sighting scope CAL Tilt Calibration Imp...

Страница 21: ...ents is itself sometimes used as an indicator of sorts if dashed lines appear the instrument is ready to take a measurement if the middle of the screen is blank the option has suboptions that can be a...

Страница 22: ...ode See Discarding Error Messages in Downloading Data Code Explanation doF Display overflow The measurement exceeds the display capacity or measurement angle at 90 degrees EoF Editor overflow E01 Fail...

Страница 23: ...anels are identically laid out The button nearest the rear panel is the Fire button The middle button is the Forward button And the button nearest the front panel is Back In the Impulse lexicon button...

Страница 24: ...whether the button is on the primary panel or secondary panel and how long you hold the button down A short press of a button simply means you press it and release it immediately A long press means yo...

Страница 25: ...n edit mode advances to the next digit Forward Moves forward in the options in a menu When DNLD is showing sends a download message out the serial port In edit mode first press restores the edit value...

Страница 26: ...tton panels Switching the Hand Strap To switch the hand strap remove the screws that attach the strap to the mounting plates Use the left thumb block and position the strap on the left side of the ins...

Страница 27: ...to be the one on the same side as the hand strap Follow this procedure to switch the primary panel 1 Press the Fire button to power on the instrument 2 Repeatedly press Forward or Back until the indic...

Страница 28: ...urements The five measurements are related the relationships among them are illustrated here Measured Calculated slope distance horizontal distance inclination vertical distance Percent slope is 100 t...

Страница 29: ...ach of the basic measurements operates in essentially the same simple way power on aim and fire except that you sometimes have a couple of other considerations First the screen must be displaying the...

Страница 30: ...or example when slope distance SD is measured only the range sensor is activated and when inclination INC is measured only the tilt sensor is activated Now a horizontal distance HD measurement is calc...

Страница 31: ...ndicator 2 Press Fire to select the SYS option 3 Press Forward repeatedly until the UNITS indicator at the bottom center of the display screen begins flashing and SEL shows in the numeric display area...

Страница 32: ...erflow error doF and inclinations that exceed 90 degrees will generate error E05 If you have turned on in the SYS UNITS option and an inclination measurement is displayed that measurement is a percent...

Страница 33: ...convenient for your measurement conditions Here is the procedure 1 Press Forward Back as necessary to show the SYS option 2 Press Fire to select the SYS option 3 Press Forward repeatedly until the M a...

Страница 34: ...ul audio updates that tell what the instrument is doing you may want to turn the beeper off and use the instrument silently This feature is available for instruments with red dot scopes only To turn t...

Страница 35: ...ight is the sum of BD and DC The Impulse implements the process with the HT option The option works by requiring that the measurements be taken in a specific order The procedure is in the table on the...

Страница 36: ...Press Back to reach the Height indicator RIGHT HT Press Fire to advance into the height subprocedure RIGHT _ _ _ _ _ _ F HT HD Button Action Result example Sight the target through the scope Press Fir...

Страница 37: ...ndicator is blinking signifying that the instrument is prepared to take a horizontal distance measurement of another target At this point you have several options Pressing Forward downloads the height...

Страница 38: ...to the target at the center of its girth This insures the most accurate horizontal distance reading thus leading to the most accurate height calculation Filter mode is helpful in this situation To acq...

Страница 39: ...your eye without moving your head during a height measurement you will want to specify the back panel as your pivot point That means specifying a pivot offset of 0 08 meters 0 25 feet However if you h...

Страница 40: ...e pivot offset is now activated for all height measurements and is denoted by the PIVOT indicator in the lower portion of the HT option display screen Additional Notes Some additional notes on using t...

Страница 41: ...termined above and use the Impulse to measure the height As you are measuring the height write down these three values the base inclination angle in negative degrees called base the top inclination an...

Страница 42: ...running total Difference Measurements Difference measurements calculate the differences between a succession of targets and a single set point You can use either horizontal distance measurements or sl...

Страница 43: ...art SD flashing Then press Forward to move to the next display The next display is a series of dashes with two arrows flashing in the right corner The instrument is now ready to accept the set point 4...

Страница 44: ...k twice to back out to the main display Exiting the difference measurement option will clear the difference measurement in memory Cumulative Measurements A cumulative measurement lets you move from on...

Страница 45: ...between the two at any time Horizontal distance is already selected as shown by the flashing HD indicator To use HD measurements then simply press Forward to move to the next display To select SD mea...

Страница 46: ...you will want to take a series of measurements and download only once when a series of related measurements are complete Additional Notes The cumulative measurement total is saved in memory even if th...

Страница 47: ...We recommend a 3 inch red bicycle reflector such as a Cole model 03 3305 which is available in hardware stores Note This technique is not effective at long ranges due to the instrument s reduced sens...

Страница 48: ...nge readings are being taken Double high pitched tone The instrument has completed the measurement and all sensors acquired readings Single high pitched tone The instrument has completed the measureme...

Страница 49: ...self The effect of the displacement is most noticeable at short range generally less than 150 meters 500 feet At ranges of more than 300 meters 1000 feet the displacement has no practical effect You a...

Страница 50: ...e up against one wall and measure the distance to the other wall Without a range offset the distance measured would be slightly shorter than the actual distance because the measuring point of the inst...

Страница 51: ...whole feet or meters Refer to The Edit Mode for more information You will know that a range offset is On when you see the OFFSET indicator in the lower left portion of the display on SD HD and VD mea...

Страница 52: ...e gate window too narrow the instrument automatically adjusts it by resetting either the short or long gate taking the most recent value entered as the standard to recalculate the other by So if the s...

Страница 53: ...use the editing function Refer to The Edit Mode for more information 6 To set a long gate value press Forward The L indicator flashes and the long gate value displays Continue to the next step To back...

Страница 54: ...complish that the Impulse offers a FILTER option to lock onto only highly reflective targets Here s how you turn FILTER on 1 Press Forward Back as necessary to show the SYS option 2 Press Fire to sele...

Страница 55: ...eset to OFF but gate values are retained in memory Offset and filter settings are saved upon powering down When using gates and offsets together keep the following in mind Gates and offsets are additi...

Страница 56: ...ition October 1998 clear the range offset to avoid confusion Gates are applied to SD measurements only and may not be exactly where expected in HD or VD See the diagram in the beginning of Taking a Ba...

Страница 57: ...g them in with the laser an optional editor is available by pressing Fire2 when a distance measurement is requested by the Impulse Once in the editor follow this method The left most digit will be fla...

Страница 58: ...value is correct press Fire A beep will sound and the value will be accepted in memory and at this point can no longer be restored by pressing Forward or Back To exit the editor and return to your sub...

Страница 59: ...ion on application software Downloading Measurement data can be downloaded using one of three methods manual download automatic download or query The data you wish to download must appear in the displ...

Страница 60: ...the automatic download mode and change the download format with the SYS DNLD option Here is the procedure 1 Use Forward and Back as needed to display the SYS indicator 2 Press Fire to select the SYS...

Страница 61: ...the horizontal distance field and will download 0 00 in both the inclination and azimuth fields This is to accommodate download software that does not accept null values Impulse 200 While CR400 is sh...

Страница 62: ...ctor or switch closure Remote triggering is accomplished by providing an open collector closure to ground or an active low TTL or RS232 level signal to the trigger pin on the serial connector This opt...

Страница 63: ...at once Serial Interface Specifications The Impulse serial interface uses RS 232 12V signal levels and data format The format parameters are set to 4800 bps CR400 format 9600 bps IP200 and IP100 forma...

Страница 64: ...wnloaded in IP200 IP100 format are in this general form datatype value dunits aunits csum CR where datatype identifies the data type Legal values ID Instrument version number BM Basic measurements HT...

Страница 65: ...wed by a hexadecimal checksum The checksum is the result of a complemented no carry binary addition of all the characters between the dollar sign and the asterisk CR is a carriage return CR400 Format...

Страница 66: ...wish to download must appear in the display window If it does not scroll to the appropriate option A CR400 format query message from the download device to the Impulse is in this general format PLTIT...

Страница 67: ...specifies a measurement value and the units in which that value is expressed This pattern repeats as often as needed to specify the downloaded values except that the final units designator is not foll...

Страница 68: ...to by the instrument Note Historically the HV data line has been the most commonly used of all Criterion 400 data line types and hence is the only data line type supplied in the Impulse Specific Mess...

Страница 69: ...odel IP200 format Message CR400 format Message 200 Query ID Response download ID IP200 1 40 2C Query PLTIT RQ ID Response download PLTIT ID IP200 1 40 44 Impulse Model IP100 format Message CR400 forma...

Страница 70: ...200 Query BM Response download BM 27 5 34 79 22 58 15 7 F D 17 Note empty field is azimuth value Bad reading or null data BM 34 79 F D AD BM F D B2 Query PLTIT RQ HV Response download PLTIT HV 22 58 F...

Страница 71: ...100 Query BM Response download BM 27 5 F D E6 Bad reading or null data BM F D B2 Query PLTIT RQ HV Response download PLTIT HV 27 5 F 3F Bad reading or null data PLTIT HV 67 Response download with dumm...

Страница 72: ...l data RD 41 00 F AC RD E5 Query PLTIT RQ RD Response Download PLTIT RD 41 00 F 1 35 F 70 Data unavailable PLTIT RD 6F Impulse Model IP100 format Message CR400 format Message 100 Query RD Response dow...

Страница 73: ...208 34 244 00 F 49 Data cleared to zero RC 0 00 0 00 F 24 Query PLTIT RQ RC Response download PLTIT RC 208 34 F 244 00 F 67 Data cleared to zero PLTIT RC 0 00 0 00 F 02 Impulse Model IP100 format Mes...

Страница 74: ...e User s Manual 8th Edition October 1998 Height Impulse Model IP200 format Message CR400 format Message 200 Query HT Response download HT 37 02 F CB Data unavailable HT 0B Query PLTIT RQ HT Response d...

Страница 75: ...The accessories are yoke and mounting bracket compass and compass mount Yoke The yoke features an open design to allow you to mount the Impulse to the pod without interfering with the operation of th...

Страница 76: ...on the side opposite the hand strap Simply screw it into place If you are switching the hand strap from one side to another you will also need to reconfigure the yoke mounting bracket for use on the...

Страница 77: ...t to a tripod or monopod first attach the mounting bracket to the side of the instrument then attach the yoke to the pod Align the thumbscrew with the middle hole in the attachment at the top of the b...

Страница 78: ...top of the mounted instrument On top of the mount is a housing that fits over the Suunto compass and holds it in place Compass mount Compass housing Compass The compass features two hairlines one of...

Страница 79: ...declination in your area is 10 E set the movable hairline so it is 5 degrees to the left of the fixed hairline If the declination is 10 W set the movable hairline 5 degrees to the right of the fixed...

Страница 80: ...rument and should be handled with care It will withstand a reasonable drop shock If you drop the instrument however check the scope and tilt alignment Impulse 200 only before using the instrument for...

Страница 81: ...loth or lens tissue Use a lens brush to remove surface dust and loose particles Remove paint splatters by letting them dry and carefully picking them off with your fingernails The windage and elevatio...

Страница 82: ...BATT indicator blinks If you continue operations and the batteries run down further a Lob message displays on the screen If you fail to change the batteries at that point the keys will lock out Realig...

Страница 83: ...arget when viewed from the instrument s position should be silhouetted against the sky with no other targets in the immediate vicinity That s so you can be certain of the general area the laser is hit...

Страница 84: ...djustment screw equals one minute of angle MOA Adjust carefully Make sure you re moving the dot or crosshair in the right direction before you try adjusting in large increments Check the alignment one...

Страница 85: ...cope 2 Make sure the instrument reads degrees and percent slope is turned off 3 Position the scope so its center is aligned with a previously determined level target Note The scope must be properly al...

Страница 86: ...the instrument with the edge of the desktop or tabletop 9 Press Fire The first press may turn on the scope dot if the instrument does not begin a series of regularly spaced tones press Fire again You...

Страница 87: ...degree of accuracy by setting up two targets 15 to 30 meters 50 to 100 feet away The center of each target must be level with the center of the scope lens and they must be facing each other This proc...

Страница 88: ...1880 feet to a cooperative target Target Ranges Impulse 100 200 50 meters to overhead cable stake 250 meters to rock face building Impulse 100LR 200LR 100 meters to overhead cable stake 500 meters to...

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