Datasheet

Figure 6. RTD Settings pop up window.
Use the appropriate settings from Table 1 and click the Write button. Click the Read button to verify the correct parameters are written.
Table 1. RTD Parameters
Parameter PT100
PT200 PT500 PT1000
R
0
(Ω) 100 200 500 1000
Gain 16 16 8 4
Max. Temperature (°C) 850 630 630 630
Min. Temperature (°C) -200 -200 -200 -200
Step 3: Perform system offset calibration.
Short J1.1, J1.2, J1.3, and J1.4 of the sensor input connector. Select the System Offset radio button and click the Calibrate button.
Tip: Press the Read button to check how the values are changed during calibration.
Step 4: Perform system gain calibration.
Short J1.1, J1.2, and J1.4; connect J1.3 to the VGND test point. Select the System Gain radio button and click the Calibrate button.
Step 5: Perform 20mA loop current calibration.
Select the 20mA radio button, enter a value in the DAC Value edit box and click the Calibrate button. This value must be found manually
by selecting a DAC code and measuring the loop current by external digital multimeter (DMM). Adjust the DAC code until the loop current
measures 20mA.
Step 6: Perform 4mA loop current calibration.
Select the 4mA radio button, enter a value in the DAC Value edit box and click the Calibrate button. This value must be found manually by
selecting a DAC code and measuring the loop current by external DMM. Adjust the DAC code until the loop current measures 4mA.
Step 7 (optional): Adjust ADC Gain and Offset for specific RTD.
Use a Fluke 724 process calibrator to simulate the RTD. For example, select PT100 RTD as a source and connect Fluke 724 to connector
J1 as a 2-wire RTD, Figure 7
.
Page 6 of 10