Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
Section 2: General operation
DMM7510-901-01 Rev. B / May 2015
2-121
Measure temperature using the front panel
To make a temperature measurement using the front panel:
1. Make the connections as shown in the previous figures.
2. Press the
FUNCTION
key.
3. Select
Temperature
.
4. Press the
TRIGGER
key for 2 seconds and verify that the instrument is set to Continuous
Measurement.
The measurements start displaying on the front panel.
Temperature transducer types
You can use thermocouples, thermistors, 3-wire RTDs, and 4-wire RTDs with the Model DMM7510.
For thermocouples, temperature measurement range depends on which type of thermocouple is
being used. Thermocouple B, E, J, K, N, R, S, and T are supported.
The thermistor types 2252, 5000, and 10,000 are supported. Note that curve-fitting constants are
used in the equation to calculate thermistor temperature. The thermistor manufacturer’s specified
curve fitting may not be the same as the ones used by the Model DMM7510.
The Model DMM7510 supports 3-wire and 4-wire RTD types of:
•
PT100
•
D100
•
F100
•
PT385
•
PT3916
You can also select the user type. When the user type is selected, you can define the alpha, beta,
delta, and zero values of the RTD.
For 3-wire RTD measurements, the HI, LO, and SENSE LO input terminals are used to measure
temperature. The SENSE LO remote senses lead resistance and properly compensates the
resistance measurement before converting to temperature. The accuracy for 3-wire RTD is with less
than a 0.1
Ω
lead resistance mismatch for INPUT HI and INPUT LO. Add 0.25 °C per 0.1
Ω
of HI-LO
lead resistance mismatch.
For 4-wire RTD measurements, by default, the Model DMM7510 measures temperature with offset-
compensated ohms and open lead detection enabled. This provides the most accurate and reliable
method to measure the low resistance of the RTD. For faster RTD measurements when the most
accurate measurements are not required, you can disable offset compensation and open lead
detection for 3-wire and 4-wire RTD measurements.
Settings available for temperature measurements
See
(on page 2-31) for settings that are available when you are
making temperature measurements.
