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2180A

2-25. Operate the 2180A Thermometer using the

following procedure:

1. Verify the instrument has the correct RTD

connected.

2. Connect the input line cord to the applicable

power source.

3. Select the temperature scale desired for display

by pressing the Front Panel SCALE switch (in for

°C, and out for °F).

4. Set POWER switch to ON.

2-24. OPERATING DIRECTIONS

2-26. Additional Features

2-27. The following paragraphs describe how the 2180A

may be used to measure voltage or resistance. In both

cases, the RTD will be replaced with a length of standard

electrical wire. To connect the standard wire to the RTD

Input Module, use steps 1-3 of the RTD Installation

procedure, ignoring all reference to the RTD.

2-28. HOW TO MEASURE VOLTAGE

2-29. The 2180A can be used to measure positive

voltages only up to +100 mV or +1V maximum in two

ranges, with 1 )uV or 10 /zV resolution respectively. To

obtain the desired range, refer to the following steps and

Figure 2-3.

4-WIRE CONNECTIONS

-V

-S

3-WIRE CONNECTIONS

-V

-s

2-WIRE CONNECTIONS

-V

-S

Figure 2-2. RTD Connections

Table 2-2. RTD Input Module Switch Settings

TYPE

DISPLAY

READING

AT TURN

RTD SELECTOR SWITCH (SI) SETTINGS

8002.2

100*

385**

100*

390**

100*

3916**

100*

392**

100*

10*

—

OHM

CAL

* = OHMS

** = PLATINUM

EXAMPLE: To select a switch setting of 5, position the RTD selector switch (1) as shown:

12 4 8

□ [zz:

1+4 + 5

2-5

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 115 116

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