Logika Technologies LM-SD User manual

Model LM-SD Standard Distance Laser Meter
Operator’s Manual
Version 11-2010

Logika Technologies Inc. Model LM-SD Operator’s Manual Rev. 11-2010
Web: www.logikatech.com Phone: [phone] Fax: [phone] Email: [email protected]
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Contents
1. Introduction...........................................................................................................................2
2. Description............................................................................................................................3
2.1 Model Nomenclature ......................................................................................................3
2.2 Specifications...................................................................................................................3
2.3 Operating Principle..........................................................................................................4
3. Location and Mounting .........................................................................................................4
3.1 Sensor Location ...............................................................................................................4
3.2 Sensor Mounting .............................................................................................................6
4. Utility Connections ...............................................................................................................7
4.1 Electrical Connections .....................................................................................................7
4.2 Plumbing Connection ....................................................................................................10
4.3 Air Purge Connection ....................................................................................................10
5 Operation.............................................................................................................................12
5.1 Controls .........................................................................................................................12
5.2 Setting Parameters.......................................................................................................13
5.3 Parameter Menus.........................................................................................................13
6. Maintenance.......................................................................................................................15
6.1 Regular Maintenance ...................................................................................................15
6.2 Returns of the LM-SD ....................................................................................................15
7. LM-SD Enclosure Dimensions .............................................................................................16

Logika Technologies Inc. Model LM-SD Operator’s Manual Rev. 11-2010
Web: www.logikatech.com Phone: [phone] Fax: [phone] Email: [email protected]
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1. Introduction
The LM-SD is a laser based distance measurement tool used to measure distances from
0.2m to more than 100m with pinpoint accuracy. A given target can be clearly identified
with the help of a red laser sighting point. The usable range of the sensor is dependent
upon target physical properties.
The range finder is based on comparative phase measurement. It emits high-frequency
modulated light which is diffusely reflected from the target and returns to the instrument
with a certain phase shift compared with the emitted signal. The distance can then be
determined with millimeter accuracy from the amount of this phase shift
Special performance features are:
- Provides high accuracy over long distances under extreme outdoor temperatures.
- Works in a wide range of operating voltages from 10 VDC to 30 VDC
- Features consistently low power consumption of <1.5 W (without IAlarm).
- Up to 30m range for distance measurement, with the potential for more than 100m
if additional reflectors are mounted onto the target (depending on reflectance and
environmental conditions).
- Visible laser beam for easier sighting.
- Switching output and analog output are separately programmed.
- Switching output tied to adjustable limits, indicating positive and negative over-range of
pre-selectable distance range window.
- Measured values can be displayed in meters, decimeters, centimeters, feet or inches.

Logika Technologies Inc. Model LM-SD Operator’s Manual Rev. 11-2010
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2. Description
2.1 Model Nomenclature
Record your Laser Meter’s complete Model Number here:
LM-SD - ___________
Base Model
Power Input
24: 24VDC
110: 110VAC
Serial Number _________________
Figure 2.1: Model Number
2.2 Specifications
Accuracy
±3mm within 30m
Resolution
0.1 mm
Laser
650nm Visible red, <1mW Class II, 0.6 mrad scattering
Detect Range
0.2-100m Reflector needed between 30m and 100m
Response
Relay < 320 ms, PNP < 300ms
Operating Temp
-10˚C to +50˚C (14˚F to +122˚F). With water cooling: +110˚C (230˚F)
Storage Temp
-10˚C to +70˚C
Output
Relay NO/NC 125VAC @ 0.3A, PNP type output 24VDC @300mA,
Analog Output
4-20mA @ ≤500Ω Accuracy: ±0.15%
Temp Drift
<50ppm/˚C
Power Input
24VDC ±10% <1.5W
Cable
Insulation 20MΩ, 500VDC, ≥500˚C (930˚F)
Housing
Hermetically sealed cast aluminum enclosure rated IP65, includes cooling
water connections and air purge.
Size
Enclosure; 280 mm L x 89 mm D x 300 mm H (with mounting bracket)
Weight
6kg (13.3 lbs)

Logika Technologies Inc. Model LM-SD Operator’s Manual Rev. 11-2010
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2.3 Operating Principle
The Laser Meter operates on a time-of flight-principal, comparing the phase shift of the
returned signal with respect to that of the emitted laser. Careful measurement of this
phase shift indicates the time taken between sending the light signal and receiving the
reflection back. This is directly proportional to the distance travelled.
3. Location and Mounting
3.1 Sensor Location
The LM-SD Sensor should be installed so as to give a direct view of the target, unobstructed
by dust, steam, hoses or passers-by. The mounting should be vibration free, as any motion
of the sensor is magnified many times at the laser spot. This is a Class II laser, it should
mounted not to shine directly into the eyes of plant personnel. Direct sunlight into the
detector may cause erroneous readings.
It is best to try to have the target surface normal to the laser beam

Logika Technologies Inc. Model LM-SD Operator’s Manual Rev. 11-2010
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Figure 3.1 shows the zero point on the LM-SD for calibration purposes. There is a
parameter “OF” that allows the Zero Point to be changed to some other meaningful point in
space.
Figure 3.1: Zero Point on the LM-SD
Mounting Distance- The sensor is rated at 30m operating distance without a reflector.
Operation at the end of this range should be tested before final installation. For distances
greater than 30m, a diffuse reflector is recommended.

Logika Technologies Inc. Model LM-SD Operator’s Manual Rev. 11-2010
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3.2 Sensor Mounting
Mounting Bracket- The LM-SD has an adjustable mounting foot designed to allow easy
rotation through horizontal and vertical axes. The sensor is fixed to the support with a
single 18 mm bolt through the LM-SD’s base mounting stand. The altitude angle may be
changed by slightly loosening the three cap screws in the base with a 4mm Allen key,
adjusting to the correct angle and retightening the same three screws. The support must be
sufficiently rigid to absorb any excessive site vibrations that could affect the precision
output of the detector.
Air, Cooling Water Fittings- The LM-SD has a water-cooling jacket to keep the electronics
within their operating temperature range, and an air-purged hood for protection of the
window glass. These sensors can thus be used in harsh environments with high
temperatures, steam, dust, and smoke. Please see Section 4.2 Plumbing Connection and
Section 4.3 Air-Purge Connection for further details on installing these protections for your
sensor.
Caution- For installation in environments that may include excessive water vapor or smoke,
it is recommended that additional ventilation such as air curtains or fans be used to clear
the area so the sensor can “see” the target.

Logika Technologies Inc. Model LM-SD Operator’s Manual Rev. 11-2010
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4. Utility Connections
4.1 Electrical Connections
Electrical Overview- All electrical connections (power and signal) to the LM-SD are made via
a 15-pin Harting style connector with ground. The sensor is supplied with a mating
connector at the back of its enclosure and a standard 2-meter cable with the quick-connect
assembly mating to the sensor and bare wire terminals for the junction box connections.
Other cable lengths are available from Logika Technologies upon request.

Logika Technologies Inc. Model LM-SD Operator’s Manual Rev. 11-2010
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Figure 4.1 Connections to LM-SD Harting Connector
Cable Specification-
Multi-lead cables of 10 x 20 gauge (10 x 0.6 mm²) shielded Teflon insulation for high
temperature applications.
Outer metallic braid for mechanical protection.
Overall diameter of 9 mm.
Minimum bending radius of 30 mm.

Logika Technologies Inc. Model LM-SD Operator’s Manual Rev. 11-2010
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Each lead is color-coded.
Junction Box Wiring- Please see Figure 4.1 for the sensor wiring diagram. The supplied
cable should be connected directly to the terminals of a junction box. All cables must be
shielded all the way to the console with the shield connected to ground to eliminate
electrical noise, which may trigger false detection. Any unused output wires must have
insulation protection or be connected to free terminals in the junction box.
Power Connections- Power Input (please specify power input at time of order).
Currently, this instrument is available in the 24VDC format only.
Current Output- 4-20mA Current Loop proportional to measured position
Relay Output- Single-pole double throw contacts, contact capacity rating is 125VAC/0.3A,
30VDC/1A. Relay operating time ≤ 320 ms.
PNP Output –Maximum current 300 mA. Response ≤300 ms
Note: PNP output and Relay output are isolated; these may wired to separate circuits
PNP output and Relay output change state together.