User`s manual

Autorange The default range is autorange. Autorange is the process where the

multimeter samples the input signal, and then automatically selects the

correct (lowest valid) range. Consider the following when using autorange:

Autoranging typically adds 150 µs to the fixed range measurement

time if it ranges up one range, or ranges down any number of ranges.

Each reading takes an additional 50 µs for each additional range-up

step. If autoranging is enabled but does not occur, approximately

100 µs is added to the fixed range measurement time. The

E1326B/E1411B automatically switches to the 10 µs aperture time

when making measurements to determine the correct range.

2. For maximum speed, group channels together which use the same

range. When the aperture time is 10 µs and autoranging is enabled

but does not occur, the measurement rate is 2380 readings/second.

3. Use autorange to simplify thermocouple, thermistor, and RTD

measurements.

Setting Autorange Autorange is set when AUTO, DEF, or no range parameter is specified in the

MEASure or CONFigure command. Autorange is also enabled and disabled

with the low-level commands:

VOLTage:RANGe:AUTO mode

RESistance:RANGe:AUTO mode

where:

mode

= ON (turns autorange on) or OFF (turns autorange off).

Querying the Range The measurement range is queried with the following commands:

VOLTage:RANGe?

VOLTage:RANGe? MIN | MAX

VOLTage:AC:RANGe?

VOLTage:AC:RANGe? MIN | MAX

RESistance:RANGe?

RESistance:RANGe? MIN | MAX

Executing CONFigure? returns the range, resolution, and measurement

function set by the

CONFigure command.

Note When querying the range, the ranges available with the range command

(Table 4-5) are returned. For example, if a range of 0.113 V is set with the

MEASure or CONFigure command, 0.125 is returned if the range is queried.

If 0.91 V is set, 1.0 is returned, and so on.

94 Understanding the HP E1326B/E1411B Multimeter Chapter 4