Instructions

Making Measurements

Testing Continuity 4

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To change the temperature scale, refer to the “Setting the Default Temperature Scale”

section in Chapter 3 of this manual. Available scales are Celsius, Fahrenheit, and Kelvin.

Refer to the “Adjusting the Meter’s Range” section in Chapter 3 of this manual for

information on how to adjust the measurement range.

Function modifiers:

4Wire Switches the measurement input connectors to 4-wire measurement

for 4-wire RTDs. 4-wire RTDs make more accurate measurements.

RTD 385 Default RTD type. All coefficients are predefined.

RO Used to select a different value of RTD resistance at 0 °C.

ALPHA Used to set the first coefficient of the Calendar-Van Dusen equation.

2ND MEA Cycles the secondary display through the measurement functions

listed below and then off.

OHMS - Displays the resistance of the RTD. 2-wire resistance is used

when in 2-wire temperature mode and 4-wire resistance when the

Meter is in 4-wire RTD mode.

Testing Continuity

Continuity testing determines whether a circuit is intact (i.e., has a resistance less than the

threshold). The threshold is selectable between 1 and 1000 Ω.

To perform a continuity test:

1. Press S on the 8846A or Q on the 8845A. An example of the continuity display

is shown below.

OPEN

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Connect the test leads as shown in Figure 4-1.

Note

The Beeper cannot be disabled in continuity. Pressing BEEPER OFF turns

off the beeper for errors.

To set the threshold value, refer to the “Setting the Continuity Threshold Resistance”

section in Chapter 3 of this manual.