Steinmeyer Mechatronik GmbH | Fritz-Schreiter-Str. 32 | D-01259 Dresden
Quick Guide – Catenary Measuring Instrument FM4-LO
Preparing for measurements
Push together the optional two-part measuring bar and clamp the locking lever (1, Fig. 1) on both sides.
When using the optional universal measuring bar, it may be necessary to undo the locking screws (1, Fig. 2) with a hexagon wrench (SW5) on
both sides of the measuring bar, then adjust the legs to the corresponding track gage and tighten the locking screws on both sides of the meas-
uring bar.
Place the measuring bar (1, Fig. 8) perpendicularly above the track with the insulated stop onto a rail.
Adjust the feet of the FM4-LO in the guide slots of the measuring bar (2, Fig. 3). Here, pull the locking bolt (2, Fig. 3) downward.
Avoid hard stops of the FM4-LO at location pins.
Measuring the catenary height above the top of the rail
Slide theFM4-LO on the measuring bar until the aimed contact wire appears in the crosshairs under the viewing aperture (7, Fig. 4).
Press the ON/DIST button (4, Fig. 4). The laser beam emerges vertically from the glass pane (2, Fig. 4).
Normally the laser point is visible on the catenary and in the crosshairs under the viewing aperture.
Laser glasses increase the visibility of the red laser point.
Observe the safety instruction for laser beam.
Press the ON/DIST button again. The measured value appears on the display (3, Fig. 4).
To switch on the continuous measurement function, press the ON/DIST button for approx. 2 seconds.
Press the ON/DIST button again to end the continuous measurement. The last measured value is shown on the display.
It is possible to the change the measurement units (m, ft, in). Press therefor the measurement unit button for 2 seconds (5, Fig. 4).
Measuring the catenary stagger to the perpendicular bisector of the track center
Measure the catenary stagger directly after measuring the catenary height or position the FM4-LO again.
Slide the FM4-LO on the measuring bar until the aimed contact wire appears in the crosshairs under the viewing aperture (7, Fig. 4).
Press the ON/DIST button (4, Fig. 4). The laser beam emerges vertically from the glass pane (2, Fig. 4).
Normally the laser point is visible on the catenary and in the crosshairs under the viewing aperture.
Read off the catenary stagger on the measuring bar scale at the measuring mark (1, Fig. 4).
If necessary, perform a cross-check. Therefor align the catenary measuring instrument and measuring turned 180° on the rail and
perform the measurement again. The measured tolerance should not exceed +/- 5 mm.
Optional: Measurement of the distance from the track center to the pole front edge (PFE dimension)
Place the mirror attachment (1, Fig. 5) on the two pins on the upper side of the FM4-LO and tighten the knurled knob.
Slide the FM4-LO on the measuring bar until it reaches the marker MVK-FM4-LO (Fig. 6).
Press the ON/DIST button (4, Fig. 4). The laser beam is deflected horizontally through the mirror attachment.
Fix the laser point on the pole.
Press the ON/DIST button. The measured value is shown on the display (3, Fig. 4).
