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2021-10-29
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6. Calibration and setup of the calibrator as usual and as described
in the user manual.
Please note that all temperature points and the accuracy during
the calibration must relate to the reference probe and not to the
“Read” value in the display.
To avoid discrepancies between “Set” value and “Read” and
“True” values it is recommended to use the “Set Follows True”
function as described in the user manual 105447 for the ATC or
127139 for RTC-156 calibrator. If using this function, calculate on
a prolonged calibration time of approx. 10 minutes per calibration
point.
8.4
Drilling instructions
In order to obtain good measuring results it is important that the hole
of the insert fits exactly into the dimensions of the sensor tube to
ensure a good contact between the sensor and the insert. It is
especially important that the flange of the sensor fits tight to the
surface of the insert.
Procedure:
1. The part of the sensor that must be dropped down into the insert
is measured. The diameter “d” and the length “l” must be
measured. If the sensor has different diameters, all of these must
be measured as well as their corresponding lengths. It is
important to note that there where the change in the sensor’s
diameter occurs the transition is gradual in an arched form (“r1”
and “r2”).
2. The hole for the sensor is placed in the centre of the insert. The
diameter is stated as the measured di 0.2 mm. The
tolerance of the diameter must be ±0.05 as indicated in fig. 4.
3. The length of the hole for the sensor is the measured 0.5
mm.
4. The hole for the reference probe must be similar to the total length
of the sensor “l1”, see fig. 4. The diameter of the hole for the
reference probe is ø4.2 mm as indicated in fig. 4.
