Temperature

Configure temperature measurements using RTDs, thermistors, or thermocouple.

Transducer Type

Supported probe types:

• Thermistors: 2.2 kΩ, 5 kΩ, 10 kΩ (2- and 4-wire)
• RTDs: 0.00385/°C (2- and 4-wire)
• Thermocouple

Thermocouple Type

Select the thermocouple type: J (default), K, E, T, N, or R

Reference Junction

Select a reference junction temperature for thermocouple measurements. Select Fixed to input a known fixed reference junction temperature (typically used for external reference junctions) or select Internal to use the internally measured temperature of the front terminals as the reference junction temperature.

Thermocouple Check

Feature to verify that your thermocouples are properly connected for measurements. When check box is selected, the instrument measures the resistance after each thermocouple measurement to ensure a proper connection. If an open connection is detected (greater than 5 kΩ on the 10 kΩ range), the instrument reports an overload condition.

Units

Select the temperature scale: Celsius (°C), Fahrenheit (°F), or Kelvin (K).

R0 (RTD and FRTD only)

Select the nominal resistance (R0) for 2- and 4-wire RTD measurements. R0 is the nominal resistance of an RTD at 0 °C. Enter the correct value for the RTD you are using. The range of values varies by DMM model. The DMM application restricts the value based on the limits defined for the selected DMM.

Aperture

Set the aperture time for the measurement in number of power-line cycles (NPLC) or in seconds (Aperture)/ resolution (Resolution). To obtain normal mode (line-frequency noise) rejection, select an integral number of power-line cycles (1, 2, 10, or 100 NPLC). For more information, see Aperture Time and Resolution.

Auto Zero

Enable autozero for all readings (select On), enable for one reading (select Once), or disable (select Off). Autozero subtracts a zero reading from each subsequent measurement.

Null State

Enable or disable the null measurement feature. This feature measures the difference between a stored null value and the input signal; Result = reading – null value. Select Value check box to enable this feature and enter a null value. Some DMMs have an Auto-Select selection. When Auto-Select is selected, the first reading taken is used as the null value for all subsequent measurements for this measurement function.

Offset Compensation (RTD and FRTD only)

Enable (On) or disable (Off) offset compensation. When enabled, resistance readings are corrected for any voltage offset in the DMM's input circuitry. When enabled, offset compensation increases measurement time.