Measuring split or horizontal joints during an outage can take hours and
hold up other critical work on the turbine. Traditionally split joints
are measured with transits and usually require at a 2-man crew. The measurements
rely on the human eye and are subject to interpretation by the operator,
an inexact science.
The L-740 Ultra-Precision Leveling Laser was designed for high-accuracy
leveling applications. It is accurate to about 1/4 of an arc second or
0.000015"/ft (0.001 mm/M) accuracies. It is an extremely portable
and very affordable alternative to traditional leveling methods like theodolites
or transits. Its automatically sweeping laser plane and large-range targets
with 0.0005" (.0125 mm) resolution create a powerful tool for quickly
aligning almost any surface or machine bed.
High Accuracy Reduces Optics Guesswork
Hamar Laser's L-740 is accurate to +/-.0015" (.04 mm) in 100 feet
(30.5 meters) or +/-.0001" (.0025 m) in 10 feet (3 M) under good
atmospheric conditions. This accuracy turns the alignment process from
an art using optics to a science using lasers. Optics can be considered
an art because each operator "sees" the readings differently
and essentially has to make an educated guess as to the correct number.
With the L-740, this guesswork is eliminated because the target electronics
determine the alignment reading.
Reduce Alignment Work Crews
The L-740 only requires one operator, even on the very largest jobs. That
frees up critical manpower to perform other tasks on the outage, helping
to reduce the duration of the outage. In fact, the same technician can
operate the L-740 Leveling System and the L-705 Bore Alignment Laser for
turbine diaphragm and seal alignments.
Minimal Training Needed
The L-740 is so easy to use that it usually only requires 1 day of training
and if our Plane5 software is purchased then it only adds 1 day to the
training. Compared with optics where training can last up to 2 weeks,
the L-740 can significantly reduce the time critical technicians are out
of action when being trained.
Multiple Targets for Fast Split Joint Measurements
The L-740 Leveling Laser System can use multiple targets, which really
speeds the data-taking process for split (horizontal) joints. In fact,
up to 4 targets can be used simultaneously. The combination of automatically
rotating lasers and multiple targets can easily reduce split-joint measurement
time by 50% or more.
Wireless
Targets and Readouts
With Hamar's new line of wireless targets (A-1519/A-1519HR/A-1520 and
A-1531/A-1532/A-1533) there is no need to string long extension cords
to reference targets. The targets have up to a 3" (76 mm) measuring
range and can be used up to 100 (30.5 M) feet from the readout. Other
features like electronic zeroing help to speed setup.
Most Accurate Mechanical Levels Available
The L-740 Laser uses level vials that are accurate to 1 arc second (0.00006"/ft
or 0.005 mm/M). Only expensive, difficult-to-use, and fragile electronic
levels are more accurate. The combination of accurate levels and automatically
rotating laser planes creates an alignment tool that is hard to beat.
Color
Windows 95/98 Software
The L-740 can also be linked to our new Plane 5 flatness analyzing software.
It is a Windows 95/98 based software that can analyze almost any layout
for flatness or straightness. Plane 5 will even analyze squareness if
used with our squareness lasers (L-743, L-742, L-741, L-733, L-732 and
L-731). Squares, rectangles, frames, circles, rings, and up to four sets
of ways can all be easily analyzed with Plane 5. The alignment data is
automatically downloaded by using our wireless data receiver, the A-908.
Wireless
Targets and Readouts 