www.miinet.com
Moore Industries-International, Inc.
- 17 -
User’s Manual
238-741-00K
May 2019
Programmable Smart HART Temperature Transmitter
THZ
3
/ TDZ
3
1. From the Online menu select “Device setup”.
2. Select “Custom Calibration”.
3. Select “Variable Trim”.
4. Select “Device variable trim”.
5. Follow and heed the information and instructions on the screen of your HART
Communicator.
6. Select “Sensor 1”.
7. Select “Trim Low”.
8. You will now be setting your input resistance to match your PV LRV. For example – If your
LRV is 32° F the input you will apply to the instrument will be 1000.00Ω.
9. When your reading stabilizes press the OK button to capture the value and follow the
prompts.
10. Follow the screen prompts to trim the PV URV.
11. Save the trim values and return your instrument to loop control and verify that your input is
reading correctly.
12. You can then perform the Variable Trim for Sensor 2 if you are using a dual sensor
configuration.
Trimming for a thermocouple input will be similar, except you will be providing an accurate
millivolt signal to simulate temperature.
To perform the Output Trimming of the THZ
3
/TDZ
3
set up the equipment specified in Table 2.1.
then use your HART Communicator, follow steps below and refer to Figure 2.5 for clarity.
Figure 2.5.
Output Trimming
12-24Vdc
Power
Supply
+
-
The HART Communicator
can be connected to any
point on the output side of
the loop. Total loop
resistance must equal
between 250 to 1,100 ohm
for proper HART
Communications
ADDR
ADDR
A
TDZ
3
Voltmeter
Load= 250 ohm
Note:
You do not need to connect any sensor to the input terminals to perform the output trim.
SECTION 2
