abtuslimitedabt 4580 relative track level gauge

Features
Accurate Relative (transfer) Levels +/- 1mm from 1700mm to 2800mm
True horizontal 6ft / 10ft measurements
Fully insulated. Allows horizontal and vertical measurements over the 3rd rail
Range of Relative Level readings from –300mm to + 175mm without the need to turn or reset the gauge
One man operation allows operator to work next to open lines safely (under lookout protection)
Able to be used in areas of high ballast or other obstructions higher than rail level		Introduction
Take low rail to low rail readings over the high rail in one operation		The ABT 4580 has been specifically designed by Railway Engineers for Railway Engineers.
Easily converted, using attachments to obtain formation / stone depths during renewal operations		It is the only gauge proven by track engineers to give accurate, quick and consistent 6ft-10ft and relative level measurements in all circumstances.
All attachments are dual calibrated to enable the laser to be used independently		The gauge has been thoughtfully designed out of light weight, non conductive materials and engineered to produce high levels of accuracy and versatility.
None of the components are affected by extremes in temperature, dust or moisture		Its user friendly design allows Engineers to set out large sites without the back breaking use of tapes, steps and level boards.
Specifications
Diagram 1		Diagram 2
The ABT 4580 can be used to read a maximum negative relative (transfer) level of -300mm. It can be used to obtain true horizontal out-side edge to out-side measurement of 1700mm to 2800mm with no loss of accuracy to the Relative measurement. The spirit level bubble (built in) is used purely to obtain a true horizontal measurement.		With other Levels you would need to turn the level to be able to read a positive Relative. With the ABT 4580, this is not necessary as it will read up to +175mm. This allows the user to stay in a place of safety if the adjacent line is open to traffic, or allows readings to be taken from under a stationary engineering train during Renewal work.
Note: The magnetic base of the Laser must be removed before the Laser is fitted to the gauge.		The ABT 4580 is also capable of being used in areas were shoulders are present or rails are placed on the sleeper ends.
Diagram 3		Diagram 4
Under all circumstances the gauge will give a true level. The close proximity of a Tamper or high winds will not affect the reading as the Laser is fitted with a damper that reduces the impact of vibration.		Various attachments can be used with the ABT 4580. In this instance the 1200mm  ABT 4582 pole can be used to check both formation or bottom stone depths during renewal operations.
Diagram 5		Diagram 6
The 1200mm ABT 4582 accessory pole is calibrated on the reverse side to work with the laser detached. This allows the Engineer to check the formation / top stone depths using only the laser.		On canted track, the Engineer may require to take a relative over the high rail. This can easily be done using the 800mm ABT 4581 accessory pole. The laser can easily be turned so as to miss the vertical pole on the ABT 4580, thus allowing a reading to be taken on any rail or object.
Note: The magnetic base must be fitted to the Laser when the Laser is used independently of the gauge.
Diagram 7
The 800mm ABT 4581 pole is calibrated on the reverse side to work with the laser detached. This allows the Engineer to obtain relative levels using only the Laser		Both the (800mm ABT 4581) & the (1200mm ABT 4582) accessory poles (ordered separately) are calibrated on both sides. Side A allows the user to use the Laser fitted with the magnetic base directly on the rail.
		The reverse, Side B on the (800mm ABT 4581) is used to take Low Rail to Low Rail measurements, and on the (1200mm ABT 4582) Side B is used as shown in Diagram 4.