HDT/Vicat Allround

The All-Round Instrument for Convenient Testing

ZwickRoell's HDT/Vicat Allround instruments determine the heat deflection temperature (HDT), and are designed to enable convenient testing in research and development, goods inwards checks and production monitoring as well as for educational and training purposes.

The instruments are available in various versions with up to six testing stations according to requirements. Test-sequence parameterization and display of measured values are conveniently handled via ZwickRoell testing software.

Advantages & Features

Benefits

Measuring station lowered automatically
Optionally available automatic lowering of the test weights
Testing to ISO 306, ASTM D1525, ISO 75 and ASTM D648.

Applications

Determination of heat deflection temperature (HDT)

as per ISO 75, Parts 1 to 3, and ASTM D648, Method 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

Functions, elements and interfaces

Built-in programmable logic controller (PLC) for temperature control and measured-value acquisition
Re-cooling controlled by solenoid valve
Motorized lowering of measuring stations
Safety thermostat
Electronic level-monitoring
Test control and data acquisition via PC with ZwickRoell testing software (RS232 interface in PC required)
Integrated compensation for heat expansion

Automatic test sequence

As soon as the heat-transfer fluid has reached the starting temperature, the specimens are inserted into the measuring stations and lowered (motor-driven) into the oil bath. In the next step the test weight specified in the standards is applied manually and the test sequence is started by the PC software.

On completion of preconditioning under the influence of force, the displacement signals are zeroed (program-controlled) and heating of the heat transfer fluid at the previously 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 automatically via a solenoid valve. Afterwards, the specimens can be removed.

Re-cooling the heat-transfer fluid

Cooling for Type A1 HDT/Vicat instruments is by means of a cooling coil located in the oil-bath. Coolant can be pumped in via a connection located on the left-hand side of the instrument. Cooling is started automatically via a solenoid valve, however only at 130°C or above. For faster re-cooling a connection for an external re-cooling unit is available (option).

Vicat softening temperature

Heat deflection temperature (HDT)

Technical Overview

Description	Value
General technical data for HDT/Vicat Allround instruments
Display accuracy at 250 °C	±0.5	°C
Spatial temperature gradient	±0.2	°C
Temperature measurement resolution	0.1	°C
Temperature sensor	Oil-bath temperature is measured by 1 temperature sensor. In addition 1 sensor is located adjacent to the specimen at each measuring station
Heating rate	50, 120 or freely adjustable	K/h
Displacement measurement with inductive LVDT measuring transducers
displacement measurement range	15	mm
display accuracy	±0.01	mm
Connections:
mains voltage	230	V
mains frequency	50/60	Hz
power rating	3000	W
water supply, max.	10	bar
PC interfaces required	RS232 interface
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

Type	HDT/Vicat 3-300	HDT/Vicat 4-300 A3	HDT/Vicat 6-300 Allround
Item No.	326042		325985¹²
No. of measuring stations	3	4³	6
Maximum number of measuring stations	3		6
Maximum temperature	+ 300		+300	°C
Temperature range	+20 to +300	+20 to +300	+20 to +300	°C
Temperature sensor	Pt 100		Pt 100
	1 x per station and 1 x per bath
1 x per station and 1 x per bath
Recooling	Motorized		Motorized
Capacity of heat transfer fluid	12			l
(the amount of heat transfer fluid must be adjusted the temperature used.)
Holding capacity of heat transfer fluid			18
(the amount of heat transfer fluid must be adjusted the temperature used.)
Temperature measurement:
Display accuracy at 250°C	± 0.5		± 0.5	°C
Spatial temperature gradient	± 0.2		± 0.2	°C
Temperature measurement resolution	0.1		0.1	°C
Heating rate	50, 120 or freely adjustable		50, 120 or freely adjustable	K/h
Travel measurement:
Measurement range	1 to 15		1 to 15	mm
Display accuracy	± 0.01		± 0.01	mm
Measuring system	Inductive LVDT measurement transducers		Inductive LVDT measuring transducers
Connection:
mains voltage	230/240			V
Power frequency	50 to 60		50/60	Hz
Power	3 000		3 000	W
Power supply voltage			230/240
Dimensions:
Height	900		900	mm
Width	1 230		1,480	mm
Depth	700		700	mm
Weight (without accessories), approx.	130	160		kg
Operating data
Coolant connection:
Flow rate, at least	5		5	l/min
Inflow pressure, maximum	10		10	bar
Connection	for hose with an inner diameter of 13.5 mm (1/2 ")		For hose with an inner diameter of 13.5 mm (1/2 ")
Cooling water temperature	+10 to +50			°C
Coolant temperature			+10 to +50
Mains
Voltage fluctuations	≤±10		≤±10	% with reference to the nominal power supply as quoted
Short term interference	≤20		≤20	ms
Frequency	±1		±1	% related to the nominal frequency as quoted
Ground	Ground resistance ≤5		Ground resistance ≤5	Ω
Item no.		326046⁴⁵
Application of test weights		motorized
Oil capacity, approx.		18.6
Height x width x depth		900 x 1330 x 750
Weight without accessories, approx.			160

1. Water supply required
2. The instruments are supplied without heat transfer fluid as standard. Order the corresponding quantity from the accessories.
Can be increased to 6 measuring stations via retrofit
Water supply required
Instruments are supplied without heat transfer liquid as standard. The required amount can be ordered from accessories.

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Learn more about HDT & Vicat

Determination of HDT VST plastics

ISO 306, ASTM D1525, ISO 75, ASTM D648

Determination of heat deflection temperature (HDT) and Vicat softening temperature (VST)

to Determination of HDT VST plastics

HDT and Vicat Testing Instruments

Standard-compliant testing to ISO 75, ISO 306, ASTM D1215 and ASTM D648.

The thermal resistance of plastics in many ranges of application is measured via heat deflection temperature (ISO 75 and ISO 306).

to HDT and Vicat Testing Instruments

Downloads

Product information: HDT/Vicat Allround PDF 529 KB
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Product information: HDT/Vicat Allround with integrated recooling unit PDF 357 KB
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