The 13x series liquid helium level monitors may be configured with up to one (1) analog interface
option and one (1) digital interface option.
The recorder output option provides a 0-10 Volt signal corresponding to the displayed liquid
level. The output is located on the rear panel of the instrument.
The 4-20 mA output option provides low noise information transmission well suited
for process control environments or long distance transmission without degradation.
4-20 mA current transmissions are not affected by line voltage drops, contact
resistance, or voltage noise. Customer supplied loop power is regulated by the 4-20 mA
circuitry. Only two wires are required for signal transmission.
The computer interface options allow computer monitoring and control of the liquid level
readout, sensor calibration, high and low setpoints, level control setpoints, and display
unit selection. Computer interface options are supplied with fully customizable virtual
instrument (VI) drivers for
National Instruments
LabVIEW® for Windows software (version 3.1 and above) at no extra charge. Please specify
RS-232 or IEEE-488 when ordering a computer interface option.
Use of the RS-232 or IEEE-488 interface option does not require the LabVIEW product.
The virtual instruments are simply provided for customer convenience. Please see the
Technical Support
section and the on-line manuals for complete details on the capabilities of the
computer interface options.
Level Instrumentation
