User`s manual

where “cc” is the multiplexer (card) number.
• 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).
• Four-wire temperature measurements use channel pairs. On the HP E1345A
multiplexer, for example, channels 0 and 8, 1 and 9, 2 and 10, etc. are paired. The
lower channel in each pair (0, 1, 2, ...7) is the "sense" channel. Use channel_list to
specify the sense channels.
• You can measure RTD types 85 (alpha=0.00385 Ω/Ω/°C) and 92
(alpha=0.00392 Ω/Ω/°C). The values 385, 0.00385, 392, 0.00392 are also
accepted for the type parameter.
• Thermistor types are 2252, 5000, and 10000. Use thermistors that match the
Omega 440xx series temperature response curves.
Example Making Thermocouple Measurements
MEAS:TEMP? TC,J,(@100:107) !Measure J-type thermocouples (scan the 8
channels once); trigger source is IMMediate
by default.
enter statement !Enter readings into computer.
:VOLTage:AC?
MEASure:VOLTage:AC? [<range>[,<resolution>]] [,<channel_list>] selects the
AC-coupled RMS voltage function and allows you to specify the range and
resolution. If you specify a channel list, those multiplexer channels are scanned.
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 0.0795 V | 0.63V | 5.09 V |
40.7 V | 300 V | AUTO | DEF |
MIN | MAX
volts
<resolution>
numeric
resolution (see Table 5-1) |
DEF | MIN | MAX
volts
<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 voltage. 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.
147 Command Reference Chapter 5