User`s manual

Example Making 4-Wire Ohms Measurements
MEAS:FRES? 1560,MAX,(@100:103) !Function: 4-wire ohms;
range selected: 1861
Ω
;
MAX resolution: 125 m
Ω
;
specify sense channel list (scan 4 channels
once); trigger source is IMMediate by
default.
enter statement !Enter readings into computer.
:RESistance?
MEASure:RESistance? [<range>[,<resolution>]] , <channel_list>
selects the 2-wire ohms function and allows you to specify the range and resolution.
Two-wire ohms measurements can only be made using the scanning multimeter (a
channel list is required).
For a complete listing of range and resolution values available, see
Table 5-1 on page 120.
Parameters
Parameter Name Parameter Type Range of Values Default Units
<range>
numeric
232 Ω | 1861 Ω | 14894 Ω |
119156 Ω | 1048576 Ω |
AUTO | DEF | MIN | MAX
ohms
<resolution>
numeric
resolution (see Table 5-1) |
DEF | MIN | MAX
ohms
<channel_list>
numeric Refer to the multiplexer user’s manual for
a list of channels available.
none
Comments • To select a standard measurement range, specify range as the input signal’s
maximum expected resistance. The multimeter then selects the correct range.
• The AUTO and DEFault options for the range parameter have the same effect
(enable autorange). The
DEF option for the resolution parameter defaults the
integration time to 1 PLC.
• The MIN and MAX parameters select the minimum or maximum values for range
and resolution:
For range:
MIN = 232 Ω; MAX = 1048576 Ω
For resolution:
MIN selects the best resolution (the smallest value from Table 5-1)
for the selected range.
MAX selects the worst resolution (the largest value from
Table 5-1) for the selected range.
• The channel list is of the form (@ccnn), (@ccnn,ccnn), or (@ccnn:ccnn), where
cc = card number and nn = channel number (105 is channel 05 of card number 1,
for example).
• To select autorange, specify AUTO (or DEF) for range or do not specify a value
for the parameter. In the autorange mode, the multimeter samples the input signal
before each measurement and selects the appropriate range.
145 Command Reference Chapter 5