2-12
IM 701240-01E
Temperature Measurement «For procedures, see section 5.14.»
Thermocouple Types
The following types of thermocouples are available.
K, E, J, T, L, U, R, S, B, N, W, and Au7Fe
Selectable Temperature Units
You can select
°
C or K.
Reference Junction Compensation (RJC)
The voltage generated by a thermocouple depends on the temperature of the spot of
measurement and the reference junction temperature. In this case, the function used to
compensate the temperature on the measurement instrument side to the cold junction is
referred to as reference junction compensation. The SL1400 normally performs
reference junction compensation with the built-in RJC circuit. The SL1400 allows you to
turn ON or OFF the internal reference junction compensation.
Burnout
This function is used to accurately detect a burnout in the thermocouple. If the
thermocouple measurement input detects a burnout, the measured value is fixed to the
upper limit of the measurement range of each thermocouple.
Strain Measurement «For procedures, see section 5.15.»
Strain can be measured by connecting a strain gauge bridge (bridge head) or a strain
gauge transducer to the strain module (701270 (STRAIN_NDIS) or 701271
(STRAIN_DSUB)).
Relationship between the Strain (
µ
STR) and the Transducer Output (mV/V)
The SL1400 allows the unit to be changed between “the strain unit (
µ
STR:
×
10
–6
strain)”
and “the output unit of the strain gauge transducer (mV/V)
*
.” The following relationship
exists between
µ
STR and mV/V.
*
Unit corresponding to the output of the strain gauge transducer. A value expressing the
transducer output per volt applied to the bridge in mV. You can set the bridge voltage
(excitation: voltage applied to the bridge) from 2 V, 5 V, and 10 V. However, since the mV/V
value is a converted value, the measured value is basically constant.
mV/V = 0.5
×
(
µ
STR/1000)
Example
500 (
µ
STR)
→
0.5
×
500(
µ
STR/1000) = 0.25 (mV/V)
Gauge Factor (K) when mV/V Is Selected
You can set the gauge factor to an arbitrary value on the SL1400. However, if there are
no specifications on the strain gauge transducer, set K to 2.
If K is not 2, e is derived within the SL1400 using the following equation.
e = (4/K)
×
(V/E)
e:
Measured value of the strain gauge transducer [mV/V]
V:
Voltage measured on the bridge [V]
E:
Voltage applied to the bridge [V]
K:
Gauge factor
2.2 Setting the Horizontal and Vertical Axes