User manual

Front Panel Operation
3-40 2001-900-01 Rev. K/ August 2010
2. Highlight the desired maximum range for autoranging
and press ENTER.
Multiple displays
There are three multiple displays available just for the
resistance functions:
• Source current
• Voltage drop
• Lead resistance (4 only)
This is the value of the current being
sourced for the present resistance range. It is based on the
calibration constants and is shown as follows:
Source Current = 0.0000 mA
This display shows the voltage drop across
the resistance under test. It is shown as follows:
Voltage Drop = 0.0000 mV
This voltage drop is determined by multiplying the source
current by the resistance and does not include voltage
contributions from other current that may be flowing through
the resistance.
This display, available only for 4-wire
ohms, shows the value of the lead resistance that is being
nulled by using the 4 function. You can use the information
to decide if a 4-wire measurement is necessary. The display
is as follows:
Lead Resistance = 0.0000 
If the lead resistance exceeds 1k, the display is:
Lead Resistance > 1000
3.4.4 Frequency
The Model 2001 can make frequency measurements from
1Hz to 15MHz through its INPUT HI and INPUT LO
terminals, and from 1Hz to 1MHz through its AMPS and
INPUT LO terminals. Assuming “bench reset” conditions
(see paragraph 3.12.1), the basic procedure is as follows:
1. Connect the test leads to the INPUT HI and LO termi-
nals of the Model 2001. Either the front or rear inputs
can be used; place the INPUTS button in the appropriate
position.
A bench reset defaults the frequency input
terminals to INPUT HI and LO.
2. Select the FREQ function.
3. Connect the test leads to the source as shown in Figure
3-16, part A.
4. Take a reading from the display.
The procedure for measuring frequency with the AMPS and
INPUT LO terminals is similar. (See Figure 3-16, part B for
a connection diagram.) Be sure the frequency function is
configured to use the current terminals.
fuse will blow. (Refer to é~ê~Öê~éÜ=PKQKO
for the AMPS fuse replacement proce-
dure.)