Laser Technology TruPulse L2

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Overview

Function Description
Usage Features
Maintenance Features

The TruPulse L2 is a compact and lightweight professional rangefinder designed to provide smart measurement solutions for various field conditions. It integrates a laser range sensor, an accelerometer tilt sensor, and a digital processor to deliver accurate distance and inclination measurements. The device is equipped with a dual-color Polymer Dispersed Liquid Crystal (PLCD) display that offers clear visibility in different lighting conditions, automatically adjusting brightness based on ambient light.

Function Description

The primary function of the TruPulse L2 is to measure distances and angles using infrared laser pulses. It calculates distance by measuring the time it takes for a laser pulse to travel from the rangefinder to a target and return. The integrated tilt sensor measures vertical angles, which the device then uses to calculate height, elevation, and slope-reduced horizontal distances.

The TruPulse L2 offers a variety of measurement modes to suit different applications:

Slope Distance: Measures the straight-line distance between the device and the target.
Vertical Distance: Calculates the vertical distance between the device and the plane of the target.
Horizontal Distance: Determines the level distance between the device and the target.
Inclination: Measures the angle of inclination between the TruPulse L2 (when held level) and the target.
Inclination Percent Slope: Provides a calculation equal to 100 times the tangent of the inclination angle, offering an alternative way to express inclination.
Height Routine (3-Point Routine): A three-step process that prompts the user to take three shots (horizontal distance, inclination angle 1, and inclination angle 2) to calculate the height of a target. This routine is ideal for flat, vertical objects and allows for multiple height measurements on the same target. It also supports shooting through brush using filter mode, a foliage filter, and a reflector.
Height Routine (2-Point Routine): This routine is designed for leaning objects and requires two shots: one to the base and one to the top of the target, both requiring a clear line of sight. The device measures the vertical distance to the base (VDb) and the vertical distance to the top (VDt), which are then added together to calculate the total height.
2D Missing Line Routine: Calculates the distance and angle between two points in two-dimensional space (connecting vector). This routine is useful for describing slope determinations and changes in elevation from one location. It requires two shots to targets, "Shot 1" and "Shot 2," to determine slope distance, inclination, horizontal distance, and vertical distance between the two points.

The device also features TruTargeting, which automatically optimizes accuracy and acquisition distance based on target quality and environmental conditions. It can measure distances up to approximately 2,195 meters (7,200 ft) to reflective targets. Target quality influences measurement precision, with high-quality targets yielding measurements with one decimal place and low-quality targets providing whole numbers.

Usage Features

The TruPulse L2 is designed for ease of use with a four-button interface:

FIRE Button: Powers on the unit, initiates laser measurements, and selects options in the system setup menu.
Up Arrow Button: Scrolls through measurement modes and system setup options.
DISPLAY/MENU Button: Toggles the automatic brightness display, changes display color (black or red), and accesses the system settings menu.
Down Arrow Button: Scrolls through measurement modes and system setup options, and allows re-measurement of previous angles in the Height routine.

Powering Up and Focus: After battery installation, a single press of the FIRE button turns the unit on. The display lights up, indicating readiness for ranging. The unit automatically powers down after 30 seconds of non-use. A diopter focus adjustment allows users to sharpen the image in the eyepiece.

Targeting Modes: The TruPulse L2 offers five targeting modes to select or eliminate targets and achieve accurate measurements in various field conditions:

Standard (Std): Single shot mode with no specific icon.
Continuous (Con): Continuously acquires targets for up to 10 seconds while the FIRE button is held down, displaying the most recently acquired target.
Closest (CLO): Acquires multiple targets while the FIRE button is held down, displaying the closest acquired target.
Farthest (FAr): Acquires multiple targets while the FIRE button is held down, displaying the farthest acquired target.
Filter (FiL): Reduces laser sensitivity to detect only pulses returned from a reflector, requiring the use of an optional mechanical receive foliage filter.

Aiming Reticle Options: Users can choose from four reticle options (Full, Crosshair, Box, Dot) to align over the target for measurement.

Units of Measurement (UoM): The device allows selection of units for distance (meters or feet) and inclination (degrees or percent slope).

Pulse Settings: The TruPulse L2 includes a Pulse Motor that provides short vibrating pulses or bursts upon target acquisition. This tactile feedback confirms that the laser has locked onto the target, accompanied by a low audible vibration. This feature can be turned on or off.

Firmware Revision Number: The device can display its firmware revision number, which is useful for Laser Tech Service Department information.

Factory Reset: The TruPulse L2 can be restored to its factory default settings, which affects some system setup options.

Maintenance Features

The TruPulse L2 is designed for durability and minimal user maintenance, with the battery being the only user-replaceable part. Removing any screws will affect or void the limited warranty.

Temperature Range: The instrument is rated for an operating temperature range of -5°C to +60°C (23°F to 140°F) and a storage temperature range of -25°C to +60°C (-13°F to 140°F). It should not be exposed to temperatures outside these ranges.

Protecting from Moisture and Dust: The TruPulse L2 is sealed to provide protection from normal field conditions, including dust and rain, but it is not designed for submersion. If water leakage is suspected, the unit should be powered off, the battery removed, and the device air-dried at room temperature with the battery compartment open.

Protecting from Shock: As a precision instrument, the TruPulse L2 should be handled with care. While it can withstand reasonable drop shock, a severe drop may necessitate service repair from LTI.

Transporting: When transporting the TruPulse L2, it should be secured in the provided carrying case. The included neck strap can be used for carrying the unit in the field.

Cleaning: After each use, the TruPulse L2 should be cleaned before storage. This includes:

Excess Moisture: Towel off any excess moisture and air dry the instrument at room temperature with the battery removed and compartment open.
Exterior Dirt: Wipe exterior surfaces clean to prevent grit buildup. Isopropanol can be used to remove dirt and fingerprints.
Transmit and Receive Lenses: Use the provided lens cloth to wipe the lenses. Failure to keep the lenses clean may cause damage.

Storing: If the TruPulse L2 will not be used for an extended period, the battery should be removed before storing the instrument.

Laser Technology TruPulse L2 Specifications

General

Accuracy	± 30 cm
Display	LCD
Measurement Time	0.5 seconds
Laser Class	Class 1
IP Rating	IP54
Measurement Range	0.5 to 2000 m
Power Source	2 AA batteries
Operating Temperature	-20° C to +50° C
Laser Wavelength	905 nm
Environmental	Water resistant