5.4 Advanced Settings for Each Channel
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5
Chapter 5 Setting Measurement Conditions
Measurement is possible when an 8948 Voltage/Temp Unitor 8949 Universal
Unit is connected. Set the range, type of thermocouple, reference junction com-
pensation, and burn out detection.
Range
Thermocouple
(the ranges that can be selected differ depending on the type)
RJC (Reference junction compensation format)
Burn Out
When Thermocouple is Selected (Temperature Measurement)
Selectable Items Measurable Ranges Maximum Resolution
100°C f.s. -100 to 100°C 0.01°C
500°C f.s. -200 to 500°C 0.05°C
2000°C f.s. -200 to 2000°C 0.1°C
Items Measurable Ranges Items Measurable Ranges Items Measurable Ranges
K
-200 to 1350°C
J
-200 to 1200°C
E
-200 to 1000°C
T
-200 to 400°C
N
-200 to 1300°C
R
0 to 1700°C
S
0 to 1700°C
W
0 to 2000°C
B
0 to 1800°C
Selectable
Items
Explanations
Internal
Performs reference junction compensation within the instrument. Mea-
surement accuracy is the sum of temperature measurement accuracy
and reference junction compensation accuracy.
External
Does not perform reference junction compensation within the instrument.
Select this setting when using an external device to perform reference
junction compensation. Measurement accuracy is equivalent to tempera-
ture measurement accuracy.
Selectable
Items
Explanations
ON
Enables burn out detection. If a wire is broken, a reading that is off the
scale is displayed at the top of the main screen, and +OVER appears in
the list display area. A broken wire is detected by applying a very small
current of approximately 400 nA to the thermocouple. If a thermocouple
that is long or has a large resistance is used, measurement errors may
occur. In such a case, use the thermocouple with burn out detection OFF
when taking measurements of high-accuracy.
OFF
Disables burn out detection. When the thermocouple is burn out, the
value is usually unstable or undecided.
Only when the recording interval falls within 100 ms to 1h, and the digital filter is
set at 50Hz/60Hz can the [Burn Out] be set to [ON].
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