Omega CN16Pt - 4.1.2.1 Number of RTD Wires (INIt > INPt > Rtd > N.WIR); 4.1.2.2 Calibration Curve (INIt > INPt > Rtd > A.CRV); 4.1.3 Thermistor Input Type Configuration (INIt > INPt > tHRM); 4.1.4 Process Input Type Configuration (INIt > INPt

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PLATINUM

Series User’s Guide

Reference Section: Initialization Mode (INIt)

Select the indicated option.

4.1.3 Thermistor Input Type Configuration (INIt > INPt > tHRM)

Select Thermistor (tHRM) as the input type. This sets up the unit for thermistor-based

temperature measurement and then the specific thermistor type can be specified. If no

thermistor type is specified, the last selected type is used.

Navigate to the correct setting. Settings include the following:

• 2.25k – 2,250 Ω thermistor (factory default)

• 5k – 5,000 Ω thermistor

• 10k – 10,000 Ω thermistor

Select the indicated option.

4.1.4 Process Input Type Configuration (INIt > INPt > PRoC)

Select Process (PRoC) as the input type. Then select the process input range and scale it. If

you stop after selecting the PRoC input type, the last selected input range and scaling is used.

Navigate to the voltage or current range of the process input. Any signal input outside of the

specified hardware input range will result in an “out-of-range” error (code E009). Input range

choices include the following:

• 4–20 – 4 mA to 20 mA (factory default)

• 0–24 – 0 mA to 24 mA

• +–10 – -10 V to +10 V

• +–1 – -1 V to +1 V

• +–0.1 – -1 mV to +1 mV

Select the desired range.

Choose either manual or live scaling. The scaling functions translate process values to

engineering units and are available for all process input ranges. The defaults for each input

range are the hardware minimum and maximum. Scaling methods include the following:

• MANL – User manually enters all four scaling parameters

• LIVE – User manually enters the low and high display values (RD.1 and RD.2) but

reads the input signal directly to set the low and high input values (IN.1 and IN.2)

Scaled values are calculated as:

Scaled Value = Input * Gain + Offset, where:

Gain = (Rd.2 – Rd.1) / (IN.2 – IN.1)

Offset = Rd.1 – (Gain * IN.1)

Therefore scaling can be done over a subset of the applicable range as this scaling calculation

linearly extrapolates in both directions.

Select the scaling method to be used.

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Omega CN16Pt - 4.1.2.1 Number of RTD Wires (INIt > INPt > Rtd > N.WIR); 4.1.2.2 Calibration Curve (INIt > INPt > Rtd > A.CRV); 4.1.3 Thermistor Input Type Configuration (INIt > INPt > tHRM); 4.1.4 Process Input Type Configuration (INIt > INPt > PRoC)