Fluidized
Calibration Bath |
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Wide
temperature range
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High
Accuracy
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Absolute
±0.0005 to ±0.004°C using
Freeze Point Cells
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Comparison
Calibration
±0.020 to ±0.035°C at 660°C
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No powder
loss into the Laboratory
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The Isothermal
Technology Limited patented fluidized bath is the result of 20 years
research and development into flow patterns, powder technology and
filtration. Recent developments have enabled the baths facilities to be
extended even further, it is now eminently suitable for Liquid in glass
thermometer calibration. To achieve this the filter and exhaust system
were re-designed to cope with the increased level of powder needed for
Liquid in glass thermometer calibration.
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The result is a calibration
system to national standards. The performance is only matched by heat
pipe technology. The profiles are so small that the bath has been used
by National Laboratories for fixed points of Indium through Aluminum,
with great success.
In comparison mode 2 sigma uncertainties of ±0.020°C
at 300°C and ±0.035°C at 660°C can be obtained.
A disadvantage of many fluidized-bed baths is that good temperature
stability and uniformity cannot be achieved in the fluidized medium
itself. They are obtained by using large metal blocks or by inhibiting
the fluidizing action in the powder around the work piece — either
locally, or by completely collapsing the bed at the required
temperature, this is not the case with the AYRES
Model 875.
A full evaluation report
is available upon request.
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| Model
No. |
875 -
Ayres Bath |
| Temperature
Range |
50°C to
700°C |
| Accuracy |
Using freeze point
cells: ±0.0005°C to ± 0.004°C
Using comparison calibration: ±0.020°C to ±0.035°C |
| Working
Volume |
67mm
dia. x 475mm deep |
| Heaters |
3 x 1 kW |
| Power |
3kw,
208-240VAC, 50/60Hz |
| Warm
Up Time |
From
50°C to 700°C, 240 minutes |
| Supply
Air Pressure |
Less
than 1 BAR 100 liters/minute max |
| Communications |
Supplied as
standard with serial interface,
PC adapter cable and Cal Notepad, |
| Safety |
Safety melting
fuse. Blocked filter cut-out
Low flow indication. Elapsed time
indication. Over pressure diaphragm |
| Dimensions |
Overall
Height: 1570mm
880mm (to top of body)
x 640mm x 580mm (HxDxW) |
| Weight |
Fluidizing Medium
48.5 lbs (22kg)
Overall Approx. 187.4 lbs (85kg) |
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