Figure 2-4 Typical Dc Voltage Connections - Keithley 2001 Operator's Manual

Step 1  Connect a DC voltage source
The Model 2001 can be used to make DC voltage measure-
ments in the range of ±10nV to ±1100V. Low level measure-
ment techniques need to be used at resolutions of 5.5 digits
and more. See paragraph 3.4.1 for low level measurement
considerations.
WARNING
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. Ex-
ceeding 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 re-
turns the instrument to autoranging. Pressing the AUTO
range key toggles autoranging.
2. You can select a different range with the
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, se-
lect the next higher range until you obtain an on-range
reading. Use the lowest possible range to obtain the best
accuracy and resolution.
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Figure 2-4
Typical DC voltage connections
RANGE and
Model 2001
2001 MULTIMETER
Ω2 Ω4
DCV ACV DCI ACI FREQ TEMP
REL TRIG STORE RECALL FILTER MATH
INFO LOCAL CHAN SCAN CONFIG MENU EXIT ENTER
Input Resistance = 10MΩ on 1000V and 200V ranges ;
> 10GΩ on 20V, 2V and 200mV ranges.
= 1MΩ on DCV peak spikes measurement.
Caution: Maximum Input = 1100V peak
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 EN-
TER key. This freezes the display until the
EXIT key is pressed, returning the display
to normal. If the ENTER key is pressed in-
stead, the display is updated with another
reading.
Step 3  View the default configuration
The DCV function has the following defaults for speed, fil-
ter, 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 toler-
ance, moving average, enabled.
• Display resolution  6.5 digits.
If these settings are not sufficient for your DCV measure-
ment, 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.
SENSE
INPUT
Ω 4 WIRE
HI
350V 1100V
PEAK
PEAK
LO
500V
INPUTS PEAK
F
R
RANGE
AUTO
FRONT/REAR
2A 250V
AMPS
RANGE
CAL
Getting Started
NOTE
NOTE
DC Voltage
Source
2-9