TIY
The Interface Solution Experts 13
Programmable Isolated
Thermocouple Transmitter
To monitor the output, either a milliammeter or a
DC voltmeter with precision load resistor may be
used. If the voltmeter and load resistor are chosen,
the voltmeter readings will be 1-5 Vdc representing
4-20 mA. Output current reading calculations can
be made with the following formula: V (voltage read-
ing)/250 ohms = mA
Note:
Jumper J305 must be STORED to perform
Standard Ranging. Verify its setting, along
with other configuration jumpers, before
beginning this procedure.
Standard Ranging the TIY
1. Set Range and Gain/Offset Jumpers for the
input type (See Table 4).
2. Connect the TIY as shown in Figure 2.
3. To view the current zero setting, press and
hold either ZERO push button.
4. To calibrate zero, press both ZERO push
buttons simultaneously.
Note:
In Standard Ranging, the LCD will
continually flash while calibrating.
5. Set input to the zero temperature value
for the configured TIY range (or to the
millivolt equivalent as derived from standard
thermocouple tables).
6. Simultaneously press both ZERO push
buttons twice. This “captures” the applied
zero input.
Note:
If the input value being captured exceeds
the upper or lower programmed table limits
for a particular input type (refer to Tables 1
and 2), the LCD will flash -HI- or -LO-. The
input value must be within programmed
table limits to be displayed or captured.
7. Verify that the milliammeter or DC voltmeter
reads 20 mA (5 Vdc when using voltmeter
and load resistor). This indicates that the
zero value was captured successfully.
Repeat steps 5-7 until the reading is 20 mA.
8. To view current span value, press and hold
either SPAN button.
9. To calibrate span, press both SPAN buttons
simultaneously.
10. Set input to the full scale temperature input
for the configured TIY range (or to the
millivolt equivalent as derived from standard
thermocouple tables). Press both SPAN
buttons simultaneously twice to “capture”
span.
ZERO
ZERO
ZERO
SPAN
SPAN
SPAN
