User manual

Model: 2100 &2300 Series
2100UM22.DOC Rev: 2.2
- 5 -
OPERATION
The unit senses level using a RF Capacitance measurement
technique for very high-resolution measurements. A probe mounted
in a vessel forms a capacitor with the vessel wall (or with a concentric
shield around the probe for non metallic vessels). The capacitance of
this arrangement is directly proportional to the level of material in the
tank and may be measured to provide signals and controls.
USER INTERFACE
Note: only the 2100 series controllers have a display and keypad. The 2300 series members are
“blind” and require a Central Access Panel (CAP) or a Handheld Calibrator for setup and calibration.
Display 4 line X 20 Character LCD with backlight + bar graph.
Keypad 4x4 Membrane type matrix.
Network RS-485 / modbus protocol
PERFORMANCE
The unit measures capacitance in pF. Capacitance to Level
translation depends on the tank geometry and the type and
temperature variance of the material being measured. The resolution
figures for Capacitance are guaranteed. Level Measurement figures
are for typical applications.
Range 0-1000pF recommended for the resolution figures listed below.
0-10,000pF may be measured with less resolution and accuracy.
Resolution Capacitance: 0.03 % of Full Scale worst case. Typical: 0.01%.
Level: 0.02% of Full Scale (6ft concentric shield probe in water)
Accuracy ±0.2% of Full Scale
INPUTS
2 wire plus shield connection to an Arjay PMC-2000 module located
in any Arjay Capacitance probe head.
OUTPUTS / RELAYS
mA output 0.05% resolution, sourced into 900 Ohms maximum load.
Relays up to 4 SPDT 10A/120VAC contacts (applies to the 2XX2 or 2xx4
models only).
Each relay may be set for differential control (hi and low setpoints)
Programmable time delay: 0 - 99 seconds. Hi Fail-safe selectable.
POWER
115VAC @ 10VA or 220VAC or 24VDC @ 0.4A max. (specify at time
of order)
MECHANICAL SPECIFICATIONS
Enclosure sub plate mount, (optional wall Mount Type Nema 4X enclosure).
Dimensions 5.3” x 8.5” x 2.5” (Wall Mount Nema 4X: 14” x 12” x 7”).
Weight 2.2 kg (5lb) max. (Wall Mount Nema 4X: 6kg (13lbs)).
ENVIRONMENTAL SPECIFICATIONS
Operating Temp. -20 to 60 Deg. C for Controller only. Probe Head: -40 to 80 Deg. C
Relative Humidity 90% max. with no condensation.