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Materials Characterisation
  Unit		     Product Testing & Calibration Unit

RRIM Relaxed Modulus Tester Model M403
RRIM Relaxed Modulus Tester Model M403

The RRIM Relaxed Modulus Tester Model M403 is a rapid and accurate instrument for measuring the modulus of rubber at a fixed elongation. This property is a very useful indicator of the state of vulcanisation in rubbers.

The tester is simple in its construction and operation. The load, in Newtons, is measured by a load cell and shown on a indicator. This load is held after 1 minute and the operator is prompted by a LED indicator light to take the reading on the DPM, after this time has elapsed, to obtain the relaxed modulus after 1 minute.

Specification
Load Cell Rated Capacity 44.4 N
Load Ranges 0 - 40 N
Load Weighing Accuracy ± 0.01 N
Power Requirement AC 210/240V, 50 HZ Single Phase
 
Dimensions
Width 200 mm
Depth 150 mm
Height 560 mm
Weight 5.14 kg

Instrument Description
The RRIM Relaxed Modulus Tester Model M403 incorporates a highly sensitive load cell for detecting the load on the specimen under test. This load cell is attached at the top of a rigid single column load frame which is fixed at its base to a casing which contains the electronics. The load indicator, balance and calibration keys for the load cell weighing system, 1 - minute LED indicator, switch for load range selection and reset button are on the front of this casing.

The tester handles both square tab-ends dumb-bell and rings test pieces. The primary spring loaded grips are for use with square tab-ends dumb-bell test pieces. For use with ring test pieces, hook grips can be attached to this basic facility.

The maximum separation of the primary grips is set at 200 ±0.5 mm to give an elongation of 100% on standard 100 mm long square tab-ends test pieces. The length of the hook grips can be adjusted in accordance with the diameter of the ring test piece to give 100% elongation.

The load weighing system includes a solid state load cell signal conditioning amplifier, a full scale load ranges of 40N. The amplifier controls provide for balancing and calibration of the load weighing system to give accurate load readings.

Applications
  • Vulcanised rubber
    		•
      Relaxed Modulus at 100% elongation
  • Latex films/gloves
    •   Prevulcanised relaxed modulus, PRM
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