Fluke - 51 - Thermometer
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Gerät:
51
Datum:
1995
Kategorie:
Gruppe:
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FUNCTIONAL OVERVIEW
The
Fluke 51 and 52 K/J Thermometers take nonlinear voltages
from thermocouples and convert the voltages to meaningful
temperature readings. These thermometers are actually
microvoltmeters with additional features to compensate
forthe reference junction and non-linearities of thermocouples.
The heart of these instruments is an analog-to-digital
converter (a/d converter) that develops a numerical
representation of an analog voltage. The a/d converter (UI)
works in the range of -10 mV to +55 mV. For the
Fluke 52,
three signals must be measured: thermocouple I, thermocouple
2, and the signal that represents the temperature of the
reference junctions. To measure the three signals, the a/d
converter is connected to each of these signals one at a
time. A microcomputer (U2) coordinates the switching and a/d
activity performed by U1. U2 also interprets the numbers
sent by the a/d converter, including reference junction
compensation, linearization, and degrees Celsius and
Fahrenheit conversion. U2 also monitors the instrument
control buttons and drives the liquid crystal display (LCD)
Reparaturanleitung
Dokumenttyp:
Reparaturanleitung
Seitenanzahl:
40
Größe:
3,6 MB
Sprache:
Englisch
Revision:
Dokument-ID:
768234
Datum:
Juni 1995
Qualität:
Gescanntes Dokument, alles ist lesbar.
Upload Datum:
12. Januar 2018
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