Making Preparations for Measurements
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IM 720120-01E
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App
Index
3.8 Connecting Thermocouples
Connecting a Thermocouple
To connect the compensation lead of the thermocouple to the input terminal (binding post
terminal) of the 701261 (UNIVERSAL), 701262 (UNIVERSAL (AAF)), 701265 (TEMP/
HPV), or 720266 (TEMP/HPV), loosen the terminal knob, pass the lead through the
terminal, and tighten the knob.
HIGH-SPEED DA
TA ACQUISITION UNIT
SLOT
1
SLOT
2
3
SLOT
SLOT
4
5
SLOT
SLOT
6
7
SLOT
SLOT
8
EXT
CLK
IN
POWE
R
TRIG
’D
START/
STOP
DISPLA
Y
PROBE POWER
( 12 V DC
)
Compensation lead
(or thermocouple wire)
To a thermocouple
L
H
+ leg
– leg
WARNING
If over-range is indicated on the display of SL1000, the SL1000 may be receiving
a voltage higher than the observed waveform or measured waveform values. To
prevent electric shock, check the input voltage level.
Range Out Slot1_L >>
Channel
U: Upper channel of the slot
L: Lower channel of the slot
Slot No.
Indicate “>>” when over-range is occurring on multiple channels.
Indicates the smallest number among the slot
that over-range is occurring on.
CAUTION
• The 701261 (UNIVERSAL), 701262 (UNIVERSAL (AAF)), 701265 (TEMP/
HPV), or 720266 (TEMP/HPV) is isolated from the SL1000. However, applying
a voltage exceeding the value below may damage the input section. If the
frequency is above 1 kHz, the input section may be damaged even if the voltage
is less than the indicated values.
Maximum input voltage (across the input terminals, H and L, at a frequency of 1
kHz or less)
42 V (DC + ACpeak)
Maximum rated voltage to earth (across the input terminal L and earth at a
frequency of 1 kHz or less)
42 V (DC + ACpeak) (CAT II, 30 Vrms)
• Correct measurements cannot be made if the positive and negative legs of the
thermocouple are reversed.
• Immediately after connecting the thermocouple, the heat balance may be
disturbed at the input terminal section and may cause measurement errors.
Therefore, wait about 10 minutes before making a measurement.