电缆硬度检测仪IPAM（核电）测试仪器市场价:0.00 优惠价:0.00 上海民能电子有限公司

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电缆硬度检测仪IPAM（核电）

品牌：Analog Interfaces

产地：美国

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IPAM4 INDENTER POLYMER AGING MONITOR SYSTEM

Theory and principles of operation

The Indenter measures and records the compressive modulus of cable insulation or jacket (sheath) by pressing a small instrumented anvil against the outer wall of the cable at a constant velocity (see Figure 1 at end of this document). The change in force divided by the change in position during the inward travel of the anvil provides the operator with a modulus value that can then be compared to previous readings or established acceptance criteria.

For cable materials that harden with age, the modulus increases. Figure 2 shows the change in modulus with time at accelerated aging temperatures for an ethylene propylene rubber (EPR)/chlorosulfonated polyethylene insulation system. Figure 2 shows that as this cable insulation and jacket system ages, the compressive modulus increases in an orderly manner. Therefore, the relative age of a cable insulation can be evaluated through analysis of the modulus.

Indenter modulus varies inversely to that of elongation-at-break; thus, as a cable hardens, its elongation-at-break decreases. The Indenter provides comparable information to that of elongation-at-break testing, without causing the cable under test to be damaged or destroyed.

If the insulation material is different than the jacket material, then the modulus value of the jacket provides an indication of the modulus value of the insulation. In almost all cable constructions in the USA, the jacket material is weaker than the insulation material (for example, a PVC jacket over EPR insulation or a neoprene jacket over cross-linked polyethylene (XLPE) insulation). Standard accelerated thermal aging test results of the two different materials are compared for the change in elongation-at-break (for example, PVC could degrade 20% while EPR could degrade 5% for the same aging exposure). Therefore, if the modulus value of the Indenter corresponds to a 20% reduction of the elongation-at-break for the PVC jacket, then the EPR insulation has experienced a 5% reduction in elongation-at-break.

IPAM4 INDENTER POLYMER AGING MONITOR SYSTEM SPECIFICATION

System includes:

Cable clamp assembly with control cable (5 feet) (1.53 meters). Cable attaches to Main Control Unit .
Indenter Main Control Unit with battery holding bracket
9-Volt external AC/DC power supply with AC power cord
RS-232 (serial) cable from Main Control Unit to Pocket PC
Indenter software for Pocket PC
Desktop data file viewer program
Operation manual
Pocket PC
Rugged case for Pocket PC with connecting cable
Removeable 4Ahr Lithium ion battery
Battery charger
Foam lined transport case
Belt holster for Clamp assembly

Accessories:

Force sensor zeroing adjustment tool
Allen wrench hex key set
Spare fuses.
Flat specimen clamp adapter (to provide for testing flat polymer materials such as gaskets)

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