OPERATING
3-12.
TEMPERATURE
1)
Rotate the Function selector switch to the Zener
diode/femp
position.
Press the
ALT-F
key
once
for Centigrade, or twice for Fahrenheit meas-
urement.
2)
Connect the temp
adaptor
to the meter
VI
rnA /
COMN
input
sockets as
shown
in the figure below. .
3)
Connect the thermocouple
(K
type) to the
temp
adaptor, observe the
polarity.
4)
Allow at least
10
minutes for connectors
of
temp
'adaptor to be stabilize-
zed
for accurate measurements.
5)
If
no thermocouple
is
connected to the temp adaptor, the ambient
temperature around the adaptor will be measured and displayed.
6)
The main display reads the temperature in Centigrade or
in
Fahrenheit,
while
the secondary display reads the absolute temperature in
degrees
Kelvin .The Following formulae are
used
for temperature calculation.
OOK=-273.1°C
0°C=32°F
100
°C=212°F
['t]=[
oK].273.1 [OF]=[°C]x9/S+32
The meter actually measures
only
the Kelvin degrees
\I()and
calculates
the Centigrade
and
Fahrenheit temperature
("C,OF)from
the above
equations.
7)
The Temperature adaptor and thermocouple produces ImV per
eK
at
the output terminal marked
"V".
The meter reads
1"1<
per mV
at
the
"V"
input terminal and 0
OK
for a
OV
input. Therefore lo:xJ"K is an input signal
of 1 V This meter can measure
the
applied voltage
at
V terminal
with
an
accuracy of 0.
05
% for an inputs
of
OV
through
2.5V Therefore the total
accuracy
depends
upon
the accuracy of the temperature adaptor
and
thermocouple.
15
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