Bedienungsanleitung Keithley 2001 (Seite 49 von 476) (Englisch)

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Front Panel Operation

2001-900-01 Rev. K/ August 2010 3-17

You can program the integration time parameter as follows:

1. From the normal reading display, press the CONFIG

key and then the appropriate function key to access the

top level of a function configuration menu. For exam-

ple, the CONFIGURE DCV menu is displayed as fol-

lows:

CONFIGURE DCV

SPEED FILTER RESOLUTION

2. Use the cursor keys ( and ) to highlight SPEED

and press ENTER. The following typical menu is

shown:

DCV MEASUREMENT SPEED

NORMAL FAST MEDIUM HIACCURACY

SET-SPEED-EXACTLY SET-BY-RSLN

3. Highlight the desired integration time and press EN-

TER. For all functions (except frequency), the parame-

ters are as follows:

NORMAL = 1 PLC

FAST = 0.01 PLC

MEDIUM = 0.1 PLC

HIACCURACY = 10 PLC

There are two additional parameters, SET-SPEED-

EXACTLY and SET-BY-RSLN. If the SET-SPEED-

EXACTLY parameter is chosen, the following message is

displayed:

NPLC=01.00 (.01-10)

By using the cursor keys ( and ) and the RANGE 

and  keys, you can enter the integration time expressed in

power line cycles. Note that integer integrations time will

increase noise rejection.

The SET-BY-RSLN parameter optimizes the integration

time for the present resolution setting. See Table 3-8 for the

default integration times of the DCV and ACV functions.

The default set-by-resolution integration times of other

functions are listed in paragraphs 3.4.2, 3.4.3, and 3.4.5.

ANALOG FILTER

The ANALOG-FILTER menu item is used to check and/or

change the state of the analog filter for the DCV function. It

is described in paragraph 3.9.

After selecting this menu item, cursor position indicates the

present state (ON or OFF) of the analog filter. To change the

state, place the cursor (using the and keys) on the

alternate selection and press ENTER.

FILTER

The FILTER parameter lets you set the digital filter response

and control its on/off operation. It is described in paragraph

3.9. Only the specifics for DC and AC voltage are covered

here.

The AUTO parameter for a digital filter optimizes its use for

the present measurement function. The defaults for

automatic filtering of DCV and ACV are listed in Table 3-9.

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DCV and ACV integration times set-by-resolution

Measurement function

and type Resolution

Integration

time

DCV 3.5d, 4.5d

5.5d

6.5d

7.5d

0.01 PLC

0.02 PLC

0.20 PLC

2.00 PLC

DCV peak spikes 3.5d (to 7.5d) Not used

RMS, average 3.5d, 4.5d

5.5d

6.5d, 7.5d

0.01 PLC

0.02 PLC

10.00 PLC

Low frequency RMS 3.5d to 7.5d Not used

ACV peak 4d (to 8d) Not used

Notes:

1. For DCV measurements, if the integration time is SET-BY-RSLN and

the resolution AUTO, the integration time will be 1.0 PLC and the

resolution 6.5 digits.

2. For RMS and average measurements, if the integration time is SET-

BY-RSLN and the resolution is AUTO, the integration will be 1.0

PLC and the resolution 5.5 digits.

3. For DCV peak spikes, low frequency RMS, and ACV peak measure-

ments, the integration time setting is ignored.

4. The resolution of DCV peak spikes can be from 3.5d to 7.5d, but the

accuracy is specified at 3.5d. The resolution of ACV peak can be

from 4d to 8d, but the accuracy is specified at 4d.

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Keithley 2001 Seite 49

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