Bedienungsanleitung Keithley 2001 (Seite 23 von 476) (Englisch)

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Getting Started

2001-900-01 Rev. K/ August 2010 2-9

Step 1



Connect a DC voltage source

The Model 2001 can be used to make DC voltage

measurements in the range of ±10nV to ±1100V. Low level

measurement techniques need to be used at resolutions of 5.5

digits and more. See paragraph 3.4.1 for low level

measurement considerations.

WAR NI NG

The maximum input voltage between

INPUT HI and INPUT LO is 1100V peak.

The maximum common-mode voltage

(voltage between INPUT LO and chassis

ground) is 500V peak. Exceeding these

values may create a shock hazard.

1. Select the front input jacks with the INPUTS button

(outer position for front jacks, inner position for rear).

2. Using the set of supplied test leads, connect the Model

2001 to a DC voltage source (e.g., a battery) as shown in

Figure 2-4.

Step 2



Select a range and display a reading

Use the RANGE keys to select autoranging or a manual

range:

1. As indicated by the AUTO annunciator, bench reset

returns the instrument to autoranging. Pressing the

AUTO range key toggles autoranging.

2. You can select a different range with the  RANGE and

 RANGE keys. When using manual ranging, be sure

to use a range high enough for the signal level. If the

“Overflow” message is displayed on a manual range,

select the next higher range until you obtain an on-range

reading. Use the lowest possible range to obtain the best

accuracy and resolution.

3. For the 200mV range, short the probe ends and allow the

reading to settle. Press REL to null any offsets. Leave

REL enabled while making measurements. Reconnect

the probes to the voltage source.

A reading can be held by pressing the

ENTER key. This freezes the display until

the EXIT key is pressed, returning the

display to normal. If the ENTER key is

pressed instead, the display is updated

with another reading.

Step 3



View the default configuration

The DCV function has the following defaults for speed,

filter, and resolution:

• Measurement speed (integration time)  Normal (1

power line cycle; 16.7msec for 60Hz, 20msec for 50Hz

and 400Hz).

• Digital filter  Advanced, 10 readings, 1% noise

tolerance, moving average, enabled.

• Display resolution  6.5 digits.

If these settings are not sufficient for your DCV

measurement, they can be changed through the DCV

configuration menu:

1. Press the CONFIG key and then the DCV or ENTER

key. The instrument displays the following menu:

CONFIGURE DCV

SPEED FILTER RESOLUTION

Pressing CONFIG, then ENTER displays

the top level of the configuration menu for

the present function.

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Typical DC voltage connections

DISPLAY

POWER

DCV ACV DCI ACI Ω2 Ω4

FREQ TEMP

REL TRIG STORE RECALL

INFO LOCAL CHAN SCAN CONFIG MENU EXIT ENTER

RANGE

AUTO

FILTER MATH

RANGE

2001 MULTIMETER

SENSE

Ω 4 WIRE

INPUT

INPUTS

CAL

500V

PEAK

FRONT/REAR

2A 250V

AMPS

350V

PEAK

1100V

PEAK

Model 2001

Caution: Maximum Input = 1100V peak

DC Voltage

Source

Input Resistance = 10MΩ on 1000V and 200V ranges ;

> 10GΩ on 20V, 2V and 200mV ranges.

= 1MΩ on DCV peak spikes measurement.

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Keithley 2001 Seite 23

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