To Next Page

To Previous Page

Voltage and Temperature Measurements 2-19

Measuring voltage and temperature

NOTES The following procedure assumes factory default conditions (see Table 1-2 in

Section 1). Details on using other settings and front panel operations are provided in

Section 3 through Section 8 of this manual.

Any time the internal temperature of the Model 2182 changes by 1˚C or more, the

10mV and 100V ranges will need to be calibrated (see “Performance considerations,

ACAL procedure” for details).

Whenever the LEMO connector of the Model 2107 Input Cable (or customized cable)

is disconnected from the input of the Model 2182 for a long period of time, the input

connectors will have to be cleaned to remove oxidation (see “Cleaning input

connectors” in Section 1).

Do not use both channels to measure temperature. The electrical connection between

the two thermocouples will cause erratic temperature readings.

Clean copper-to-copper connections minimize thermal EMFs. However, when

measuring very low voltages, there may still be enough thermal EMFs to corrupt the

measurement. In this case, use the Relative feature of the Model 2182 to null out that

offset. See “Nulling thermal EMFs” which follows the basic measurement procedure.

Step 1 Connect test circuit to Model 2182

As explained in “Connections”, connect the test circuit to the input of the Model 2182.

Figure 2-4 through Figure 2-9 show connections for voltage and temperature measurements.

Step 2 Conﬁgure temperature (if applicable)

If temperature measurements are going to be performed, conﬁgure temperature as previously

explained in “Temperature conﬁguration.”

Step 3 Measure Channel 1

If Channel 1 is connected to measure voltage, press DCV1. If connected to measure

temperature, press TEMP1. Observe the reading on the display. The “CH1” annunciator

indicates that Channel 1 is selected.

Step 4 Measure Channel 2 (if applicable)

NOTE Channel 2 inputs must be referenced to Channel 1 LO.

If Channel 2 is connected to measure voltage, press DCV2. If connected to measure

temperature, press TEMP2. Observe the reading on the display. The “CH2” annunciator

indicates that Channel 2 is selected.

Keithley 2182 User Manual

Other manuals for Keithley 2182