Front Panel Operation
3-97
Ω
4W function:
The
Ω
4W function is valid only for channels
1-5. If selected, “PRD” (paired) will be shown on the corre-
sponding paired channel 6-10 even if you just step through
with the cursor keys and do not press ENTER. Once
Ω
4W is
selected on channels 1 to 5, changing the assignment to a dif-
ferent function will de-assign the paired channel and change
the function to “---” (none).
TMP function:
Similarly, the TMP selection is valid only for
channels 1-5 if the temperature sensor is a 4-wire RTD type.
If a 2-wire RTD type is used, channels 6-10 could be as-
signed to the TMP function, but if the sensor type is later
changed to 4-wire RTD, any channel from 6-10 will then be
set to “---” (none).
JN functions:
Note that there are five reference temperature
functions available (JN1-JN5). Junction types are defined us-
ing the CONFIGURE TEMPERATURE menu.
NOTE
The JN functions in the internal menu are
intended for use with a possible future in-
ternal thermocouple scanner card. The
Model 2001-SCAN internal scanner card
is not intended to be used with thermocou-
ples.
No function (---):
Selecting none (---) effectively removes
that channel from the scan list. When scanning, the instru-
ment will skip any channels that have no function defined.
EXTERNAL-INPUTS:
This menu item allows you to se-
lect measurement functions for external scanner cards used
with the Model 2001 Multimeter. When the EXTERNAL-
INPUTS menu item is selected, the instrument will prompt
you to enter the number of channels being used:
# EXTERNAL INPUTS=80
Use the cursor and range keys to select the number of chan-
nels (1-80), then press ENTER. Once the number of inputs is
selected, you will be prompted for channel functions:
SET CHAN FUNCTIONS
DEFAULT CHOOSE-FUNCTIONS
Briefly, these menu items allow you to select the following:
Default:
This selection assigns the presently selected mea-
surement function to all external channels.
Choose-Function:
This menu choice allows you to define
functions for each external channel through the following
prompt:
SELECT CHAN= 01 (DCV)
Select the channel to be programmed using the range and
cursor keys, then press ENTER. The instrument will display
available functions:
CHANNEL#01 FUNCTION
DCV ACV DCI ACI
Ω
2W
Ω
4W FRQ TMP
ALT JN1 JN2 JN3 JN4 JN5 ---
Use the cursor keys to select the desired function, then press
ENTER. Repeat the procedure for every external channel to
be defined.
SAVE-ALT-FCN/RESTORE-ALT-FCN:
An ALT (alter-
nate) function is one that cannot be directly accessed with
one of the eight function keys. For example, assume that you
select the ACV peak function using CONFIG-ACV. You can
then use SAVE- ALT to assign peak ACV to the ALT func-
tion. Whenever the ALT function is encountered in the scan
list, the instrument will switch to the ACV peak function for
that channel even if the instrument is measuring a different
type of ACV (RMS for example).
You can also use the ALT function to store an existing main
function but with a different set of operating parameters. For
example, you could set up a specific set of operating
parameters for the straight DCV function and a second DCV
setup as the ALT function. This arrangement allows you to
specify changes in virtually any measurement parameter
from channel to channel even if the measurement functions
are the same.
NOTE
Some functions may not be compatible
with certain scanner cards. For example,
you should not use the DCI and ACI func-
tions with the Model 2001-SCAN internal
scanner card.
SAVE-ALT-FCN:
Stores the presently selected function and
all its configured settings as the ALT function.
RESTORE-ALT-FCN:
Restores the function that was saved
as the ALT function and all associated settings as if a normal
function change were taking place.
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