OMEGA Model CYD201/CYD208 User’s Manual
SoftCal™ calibrations are made at three temperature points: liquid helium (4.2 K), liquid nitrogen (about 77 K), and 305 K. Below is the accuracy* of the
+0.5 K | 2 K to <30 K | +0.25 K | 345 | K to <375 K | |
+0.25 K | 30 | K to <60 K | +1.0 K | 375 | K to 475 K |
+0.15 K | 60 | K to <345 K |
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*These values generally apply to all silicon diode sensors. Only
This section covers the SoftCal™ Calibration Procedure (Paragraph 3.6.1), Verifying SoftCal™ Operation (Paragraph 3.6.2), and Erasing SoftCal™ Compensations (Paragraph 3.6.3).
3.6.1SoftCal™ Calibration Procedure
1.Turn on thermometer 30 minutes prior to operation.
2.Place the SET switch in position 1.
3.Hold UNITS until 0 kelvin (or equivalent in °C or °F) displays. The key acts as a toggle. If the display rises, release and press again.
4.Press CAL ENABLE on rear panel with a pen tip. The display reads
5.Hold UNITS until the sensor temperature displays. For example, if setting SoftCal™ for liquid helium, the display reads 4.2 K. If setting for ice point, the display reads 0 °C.
6.Verify sensor stabilization at calibration temperature.
7.Press CAL ENABLE again.
8.To enter more than one point, go back to step 5. NOTE: One point may be entered between 1.4 K to 9.9 K. No point may be entered between 10 K and 40 K. Two points may be entered above 40 K.
9.Return the SET switch to position 0.
Operation |