6
3.0 CALIBRATING THE TRANSMITTER
Calibration Setup:
To prepare the ice bath:
1.
Fill a glass beaker with crushed ice made from distilled water.
2.
Fill the beaker with enough distilled water so that the ice bath just becomes
slush, but not enough to float the ice.
3.
Insert the reference thermocouple.
Figure 3-1. Calibration Setup using a Millivolt Source
1
2
3
4
5
SPAN
(—)
(—)
(—)
(—)
(+)
(+)
(+)
(+)
DMM
(4-20 mA)
MONITOR
DC SUPPLY
24 VDC
MULTIVOLT
SOURCE
DMM
ZERO
INPUT
THERMOCOUPLE
WIRE
ICE BATH
COPPER
WIRE
REFERENCE
PROBE
250 OHMS
Содержание TX90A Series
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