• New Model GS3 now includes a Mems Accelerometer/Micro controller with Auto-Calibration
  
• Calibration settings stored and retained in NVRAM (Non-Volatile Random Access Memory)
  
• Rocker Cycle Counts are Electronically Determined and Registered on a Large Liquid Crystal Display (LCD)
  
• Automatically Starts and Stops Cycle Count with no continuous observation necessary
  
• State-of-the-Art Design
  
• One-Piece Frame Construction for Accuracy and Permanence

The Paul N. Gardner Company is pleased to include an advanced automatic version of the time honored Sward Hardness Rocker in their line of instruments. There are two major advances. The fabricated and assembled parts of the rocker are replaced by a single frame, machined from a solid metal bar.

The two bubble levels for determining the high and low limits of swing are replaced by Mems Accelerometer which, through electronic circuitry, automatically register the swings on a large character liquid crystal display digital counter.

The hardness rocker is cut from a solid bar of brass by a combination of conventional and electrical discharge machining. This production procedure insures the following advantages:

• A true and reproducible radius of the rings as shown in View (B) of Fig. 1. An enlarged optical comparator cross section view of an earlier Sward rocker ring at three locations within the sample contact arc (S) of Fig. 1, with a true radius included for comparison, is shown in Fig. 2. Circles shown in Fig. 2 are optical comparator reference rings.

• Exact concentric alignment of the instrument rings (C/R1 and C/R2 of Fig. 1). This true alignment was almost impossible to attain in earlier rockers with the assembly of separate rings attached with spacers.
  
• Exact and true separation of the instrument rings insured by a continuous metal web on the lower half of the rocker.
  
• The Gardner/Sward Hardness Rocker has a cross section ring area with horizontal as well as vertical segments (View “A” of Fig. 1). This design provides the strongest possible rings while retaining the same area as earlier instruments.

• High and low angles (“H” and “L” of Fig. 1) for the cycle count are set at the exact specified angles by the manufacturer.
  
• The demanding operator task of observing bubble position and counting cycles during the testing procedure is completely eliminated. The operator simply rotates the rocker past the angle (H of Fig. 1) where count starts and releases the instrument. This motion resets any digits showing on the display to zero. Automatically, the instrument starts registering cycle counts at the high set angle (H) and stops at the low set angle (L). This cycle count between the high and low set angles is held on the display until further action is taken by the operator.

The Gardner/Sward Hardness Rocker is a delicate instrument. Any scratches or nicks that occur by improper handling on the ring radius in the arc of sample contact area may change results obtained by the instrument. There is no way of removing such damages without changing the original sensitivity, calibration and function of the instrument. This instrument should only be handled by qualified personnel. Do not use any type battery for replacement other than catalog number (HA-1023/B) listed in price section.