3-12
IM 701830-01E
3.8
Connecting a Thermocouple
(For Temperature Module)
Connecting a thermocouple
Connect the thermocouple strand directly to the input terminals of the temperature module.
CAUTION
• The temperature module is insulated from the main instrument. However, if a
voltage exceeding the value indicated below is applied, it may cause damage to
the input section. At a frequency above 1 kHz, damage may occur even when the
voltage is lower than this voltage.
Maximum input voltage (across the input terminals, H and L, at a frequency of 1
kHz or less)
42 V (DC+ACpeak)(CAT I and II, 30 Vrms)
Maximum allowable common mode voltage (across the input terminal, L, and
earth, at a frequency of 1 kHz or less)
42 V (DC+ACpeak)(CAT I and II, 30 Vrms)
• If the + terminal and - terminal are reversed, correct measurement cannot be
made.
• Immediately after connecting the thermocouple, the heat balance may be
disturbed at the input terminal section and may cause measurement errors.
Therefore, wait about ten minutes before making a measurement.
• In an environment where the air from the air conditioning is directly applied to the
input terminals or where there are effects from a heat source, the heat balance
may be disturbed at the input terminal section and cause measurement errors.
When making measurements in these environments, take preventive measures
such as changing the position.
Compensating leadwire
(or thermocouple element wire)
To the thermocouple
