HBM QuantumX MX1609, Руководство по эксплуатации, Страница: 82 / 181

82 Connection
HBM QuantumX
6.1.4 Auto Cal / Auto Adjustment
When the module has been started up, measurement channels with strain gauge full bridges
are cyclically adjusted during run − time. This mechanism improves the long − term stability
(aging) and, in the event of temperature variation at the place of installation of the measuring
instrument, also the short − time stability of a measuring amplifier.
Autocalibration briefly interrupts measurement and − instead of measured values from a
transducer − signals from an internal calibration source are transmitted to the A/D converter
(zero and reference signal).
MX840, MX840A and MX440A amplifiers offer an
auto adjustment function.
In the full/half bridge measurement mode, these amplifiers use a second measuring circuit
that measures in parallel to the input circuit and carries out a calibration cycle at 30 second
intervals. Long − term and short − time stability are thus guaranteed in this circuit. A patented
method now enables the calibration channel’s accuracy to be transferred to the
measurement channel.
These modules thus attain high stability without the need to cyclically hold the measured
value.
Autocalibration is activated by default. This cyclical autocalibration can also be quickly
deactivated via QuantumX-Assistant and via catmanEASY
®
.