LD-50 Raytheon analyzer 1 Reykjavik elastic requirements of the test instrument will be fixed to the string on the Ray's folder a pointer root, the other root pointer hung hanging 300g weight on the left scale readings. 2 Determination of the expansion value Remove the boiling box with the specimen of the Ray's clamp on the pad, the pointer up, flat on the scale reading. Then calculate the expansion value according to GB1346-89. Maintenance of the LD-50 Rex Clamp Meter 1 Periodically check the verticality of the left boom and bracket pole and whether the fasteners are loose. 2 pads should not have rusty stains and other objects. 3 After use, apply anti-rust oil in addition to the scale and keep it in a safe place to avoid rusting and bruising.