The Piab Craneweigher is an all-weather instrument, equally suitable for use in or out of doors and may be supplied with or without remote-reading instruments for weighing and for measuring of mechanical forces.

The Piab Craneweigher is exceptionally well suited for measurements in breaking tests, as the max. load pointer remains at the breaking point or max. value reached.

The pull rod operates the pointer through a spring loaded floating transmission mechanism. This allows the craneweigher to withstand very severe shock loads and rapid unloading.

The power absorbing element consists of specially made Belleville type spring washers, so designed as to be entirely free from wear.

The spring washers cannot be overloaded.

The Piab Craneweigher is fully pressure tight and each instrument is pressure tested. No leakage is permitted. The external surfaces are zinc plated with clear chromate passivation. If the craneweigher is to be used in a very corrosive atmosphere, it can be epoxy lacquered.

Safety factor 5:1. (Guaranteed to withstand a load of 5 times full scale reading before rupture.) The resistance to rupture is tested by the National Swedish Institute for Materials Testing.

The craneweigher may be overloaded by 100% without impairing the accuracy.

The scale is protected by thick acrylic glass and a heavy duty removable wire shield.

The craneweighers, types WA-WG have drop-forged steel eye brackets (SIS 2174 St 52-3N acc. to DIN 17100, 50 D acc. to BS 4360); giving a guaranteed impact resistance to -4°F (-20°C).

The O-ring of the pull rod is protected by a neoprene rubber membrane.

On instantaneous unloading, e.g., breaking test, the return movement of the pull rod is retarded by a specially made spring washer.

The Piab Craneweigher is approved by the National Swedish Board of Occupational Safety and Health for integral connection in the carrying system of a lifting device and for weighing of test loads in connection with inspection.

The Piab Craneweigher used for remote reading is supplied with a built-in precision potentiometer. The potentiometer is directly connected to the scale mechanism of the Piab instrument. The electrical resistance of the potentiometer varies in proportion to the load of the craneweigher. The resistance is indicated on a receiving instrument, calibrated individually and marked with the same serial number as the craneweigher. The electrical connections are made in the terminal box to a numbered connection block.

A craneweigher with potentiometer cannot be equipped with max. pointer.

If a craneweigher with potentiometer is delivered without receiving instrument, a resistance chart with at least 10 incremental values is included.

The Piab Dynamometer can be equipped with a built-on adjustable contact head. Using a microswitch, which is directly influenced by the pull rod, the dynamometer gives an electrical contact function at a previously set value. For the types MA-O the extension to the body length is about 3.15/16" (100 mm), for Q about 4.1/3" (110 mm), for S about 3.5/64" (78 mm), for U and G about 3.5/8" (95 mm) and for the type E about 4.1/64" (102 mm).

For a dynamometer with 1100 lb. or 2200 lb. capacity, the types MA and MB are used. These have spring assemblies for 1100 lb. or 2200 lb., arranged in type M housings.

The dynamometers MA-O can be equipped with 1-3 and the types Q-E with 1-5 microswitches. The electrical connections are made in the terminal box to a numbered connection block.

Repeatability: ± 0.6% of the max. capacity.

Max. Contact Load: 250 VAC, 500 VA, 3A.

Max. Cable Area: 4 mm²

The Mechanical Life of the Microswitch: 20 mill. cycles.