HDT Vicat Std
Applications
Determination of heat deflection temperature (HDT)
• as per ISO 75, Parts 1 to 3, and ASTM D648,nMethods A and B, on thermoplastics, hard rubber and fiber-reinforced and filled thermosets. Determination of Vicat softening temperature (VST)
• of thermoplastics as per ISO 306 and ASTM D1525 . Determination of creep behavior
• under flexural load
- Description
- Technical Data
Product Description
Feature and Advantages
Function description
HDT/Vicat Standard instruments are designed for use in goods inwards checks and production monitoring, as
well as for educational and training purposes. The instruments are available in various versions, with up to
6 measuring stations according to requirements. Testsequence parameterization and display of measured values are conveniently handled via Zwick Roell testing software.
Test sequence
As soon as the heat-transfer fluid has reached the starting temperature, the specimens are inserted into
the measuring stations and lowered manually into the oil bath. In the next step the test weight specified in the standards is applied manually and the menu-driven test-sequence is started on the PC. On completion of pre heating under the influence of force, the displacement signals are zeroed (programcontrolled) and the heating of the heat-transfer fluid at the pre-set rate is started. As soon as the required deflection, outer-fiber strain or penetration is attained, the heating is switched off and the test is ended. Re-cooling of the heat-transfer fluid is started manually or by the PC via a solenoid valve. Specimens can afterwards be removed.
Functions, elements and interfaces
• built-in microprocessor-controlled electronics for temperature control and measured-value acquisition
• measured values clearly displayed
• safety thermostat
• electronic level-monitoring
• test control and data acquisition via PC with Zwick Roell Prüfsoftware (2 RS232 interfaces required in PC; 1x for temperature channel, 1x for displacement channel)
• integrated compensation for heat expansion of measuring stations with PC operation
• manual lowering of measuring stations
• manual application of test weights.
Re-cooling the heat-transfer liquid
Instrument cooling is via a cooling coil located in the oilbath. Coolant (water) can be pumped in via a connection located on the left-hand side of the instrument. Water-cooling is switched on manually, but not before 130°C at the earliest. For faster re-cooling a connection for an external re-cooling unit is available
Technical data
| Description Value |
| General technical data for HDT/Vicat Standard instruments |
| Display accuracy at 250 °C ±0.5 °C |
| Spatial temperature gradient ±0.1 °C |
| Temperature measurement resolution 0.1 °C |
| Temperature sensor Oil-bath temperature is measured by 1 temperature sensor. |
| Heating rate 50, 120 or freely adjustable K/h |
| Displacement measurement with digital measuring transducers: |
| resolution 0.001 mm
display accuracy ±0.01 mm Connection: mains voltage 230/240 V mains frequency 50/60 Hz power rating 3460 W water supply, max. 10 bar PC interfaces required • 1x for temperature channel (RS) • 1x for displacement channel (RS) |
| Specimen data |
| VST specimen dimensions, max. 10 x 6.5 x 10 mm |
| HDT specimen dimensions, max. 13 x 15 x 130 mm |
| HDT spans 64, 100 and 101.6 mm |
HDT/Vicat with temperature range up to 300°C
| Item no. | 3260301)2) 3260321)2) 3260361)2) | |
| Type | HDT/Vicat 3-300 S HDT/Vicat 4-300 S HDT/Vicat 6-300 S | |
| No. of measuring stations | 3 43) 6 | |
| Temperature range | +20 to +300 +20 to +300 +20 to +300 | °C |
| Re-cooling | PC-controlled via solenoid valve | |
| Oil capacity, approx. | 19.9 36 36 | l |
| Height x width x depth | 500 x 440 x 600 500 x 710 x 600 500 x 710 x 600 | mm |
| Weight (without accessories), approx. | 30 35 35 | kg |
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