12 The Interface Solution Experts
Programmable Isolated
Thermocouple Transmitter
TIY
12 - 42 VDC
POWER
SOURCE
THERMOCOUPLE
SIMULATOR
OR
ADJUSTABLE
MILLIVOLT SOURCE
SAVE
CANCEL
ZERO
SPAN
DC VOLTMETER
–
+
+
–
–
+
NOTE:
The type of thermocouple wire that will be
used in the installation must be used during
calibration.
250 ohms
+PS
–IN
–PS +IN
Standard Ranging
Standard ranging is used to set the zero- and
100-percent output settings of the TIY based on user-
selected input values. The input values are simulated
by calibration equipment to represent actual thermo-
couple or millivolt input values.
Note:
Standard Ranging is the only field
calibration possible for units WITHOUT an
LCD. When calibrating a TIY equipped with
an LCD, the user should disregard the LCD
readings and respond only to the readings
of the calibration equipment.
Storing jumper J305 configures the TIY for standard
ranging (See Figure 1).
Figure 2.
Connecting the TIY for Standard Ranging
Calibration Setup
Standard Ranging requires an input source, dc power
source, and an output meter. Table 6 lists the calibra-
tion equipment. Figure 2 illustrates the calibration
setup required to perform Standard Ranging.
Caution:
The type of thermocouple wire that will be
used in the actual installation must be used
during calibration to assure accuracy.
Table 6.
Calibration Equipment for Standard Ranging
Equipment
Thermocouple
Simulator
Voltmeter and
Precision Resistor
DC Power Source
Specifications
Accuracy of ±0.02% or better
Digital voltmeter, accuracy of ±0.01% or
better, 250 ohm precision resistor, toler-
ance of ±0.01%
12-42 Vdc; accuracy of ±0.5% or better
