44
c
HAPTER
3:
Operation
F71/F41 Teslameter
3.6.3.2 Mounting
3.6.3.2.1 Locating Pins
For best results when mounting a mountable probe, it is recommended that locating
pins be used to allow the probe to be reliably and consistently attached. This is partic-
ularly important if the probe is to be periodically returned to Lake Shore for recalibra-
tion. The locating pins allow the probe to return to the same position and orientation
every time. The pin recesses is the probe are designed for 2 mm diameter pins no
higher than 1.5 mm.
3.6.3.2.2 Fasteners
Holes have been provided on the probe to secure the probe with fasteners once it is
seated over the locating pins. These fastener through holes are not intended as locat-
ing features for the probe. However, if precision and repeatability of the sensing ele-
ment location are not required, the holes can be used in lieu of the locating pins.
These through holes are sized for M2 fasteners with socket heads. Fasteners with
larger heads may not fit into the recess provided for the screw head. Ensure screws
have heads less than 4 mm in diameter and sit flat against the probe surface, i.e., are
not counter-sunk.
3.6.3.2.3 Probe Orientation
Mountable probes have the Lake Shore logo on just one side of the probe, making it
easier to repeatedly mount the probe in the same orientation and ensure the polarity
and/or sensor location is not accidentally swapped.
FIGURE 3-42
Locating pins
Pin
Description
1
The pin recess positioned closest to the stem of the probe is the primary locating feature, used as the
point of reference for the probe sensing element.
2
The remaining pin recess is positioned 100 mm from the first pin and is used to stop the probe rotat-
ing around the first pin. This recess is elongated to make it easier to seat if the distance between the
pins is not exact.
TABLE 3-6
Locating pins