Tektronix 47E5A

TEMPERATURE
The maximum safe voltage on the measurement
surface is ±400 V (dc + peak ac) above chassis
ground .
The
sensor tip is fragile and may break if dropped or
subiected to excessive stress. Force exerted on the
sensor tip should not exceed 20 pounds .
"the reading exceeds - 55° C or + 150° C, remove
the
probe at once to prevent probe damage.
1. Push in the TEMP (0 C) FUNCTION button . See
Fig. 10.
2. Apply the temperature probe to the device to be
measured so the flat surface
of the probe tip mates against
the device to be measured and observe the reading.
See
Table 4 to convert the reading from centigrate to
fahrenheit.
NOTE
Temperature accuracy is affected by several factors
such as the angle of contact between the probe and
the device to be measured, a thermal gradient, heat
removed from the device by the probe, etc.
These items
and other probe information are in the
probe manual, which should be reviewed.
Accuracy Check
The DM44 is calibrated to its original probe, giving
accurate readings within 2°C for examples that follow .
The DM44 should be recalibrated to any replacement
probe .
In the following checks , use an accurate thermometer
to verify water temperature. Anything in solution affects
the
melting temperature and the boiling point is affected
by changes
in altitude and barometric pressure.
low Temperature
Allow a container (preferably insulated) of crushed ice
to melt
until there are only a few pieces of ice remaining.
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475A/DM44 Operators
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