Inverse frequency shift capacitive level detection
Input
Measured variable
Change in picoFarad (pF)
Output
Output signal
Relay output
1 SPDT Form C relay
Max. contact voltage
30 V DC
250 V AC
Max. contact current
5 A (DC)
8 A (AC)
Max. switching capacity
150 W (DC)
2 000 VA (AC)
Time delay (ON and/or OFF)
1 ... 60 s
Solid-state output
Output
Galvanically isolated
Protection
Against reversed polarity (bipolar)
Max. switching voltage
30 V (DC)
30 V peak (AC)
Max. load current
82 mA
Voltage drop
< 1 V, typical at 50 mA
Time delay (pre or post switching)
1 ... 60 s
Accuracy
Resolution
Min. sensitivity (pF)
1 % change in actual capacitance
Max. temperature error
0.2 % of actual capacitance value
Rated operating conditions1)
Installation conditions
Location
Indoor/outdoor
Ambient conditions
Ambient temperature
-40 ... +85 °C (-40 ... +185 °F)2)
Medium conditions
Liquids, bulk solids, slurries and interfaces, and applications with viscous materials
Relative dielectric constant ?r
Min. 1.5
Process temperature
Rod/Cable version
-40 ... +200 °C (-40 ... +392 °F)2)
High-temperature version
-40 ... +400 °C (-40 ... +752 °F)
Process pressure3)
-1 ... +35 bar g (-14.6 ... +511 psi g)
Design
Material (enclosure)
Powder-coated aluminum with gasket
Degree of Protection
Standard: Type 4/NEMA 4/IP65 Optional: Type 4/NEMA 4/IP68
Cable inlet
2 x M20 x 1.5 thread (option: 2 x ?" NPT conduit entry including 1 plugged entry)
Controls and displays
Displays
3 LEDs, for probe status, output status and power supply
Potentiometers
2 potentiometers for time delay and sensitivity
Switches
5 DIP switches for delay on/off, fail-safe high/low, time delay test/adjust, high/low sensitivity, test delay settings
Power supply
Supply
12 ... 250 V AC/DC, 0 ... 60 Hz, galvanically isolated, 2 W
Certificates and approvals
General Purpose
CSA, FM, CE, RCM
Flameproof Enclosure with IS Probe
ATEX II 1/2 G EEx d[ia] IIC T6 ... T1 ATEX II 1/2 D T100 °C
Dust Ignition Proof with IS Probe
ATEX II 1/2 D T100 °C CSA/FM Class II, Div. 1, Groups E, F, G CSA/FM Class III T4
Explosion Proof Enclosure with IS Probe
CSA/FM Class I, Div. 1, Groups A, B, C, D CSA/FM Class II, Div. 1, Groups E, F, G CSA/FM Class III T4
Marine
Lloyds Register of Shipping, Categories ENV1, ENV2, and ENV5
Overfill Protection
WHG (Germany) VLAREM II (Belgium)
Others
Pattern Approval (China)
1) When operation is in areas classified as hazardous, observe restrictions according to relevant certificate. See also Pressure/Temperature curves starting on page 5/57.
2) Thermal isolator is used if process connection temperature exceeds 85 °C (185 °F).
3) Pressure rating of process seal is temperature dependent. See Pressure/Temperature curves starting on page 5/57.
Design: Probe
Rod version
High Temperature version
Cable version
Length
Min. 250 mm (9.8 inch), max. 1 000 mm (40 inch)
Min. 250 mm (9.8 inch), max. 1 000 mm (40 inch)
Min. 1 000 mm (40 inch), max. 25 000 mm (984 inch)
Sensor wetted parts
PFA (no insulation on active probe), 316L stainless steel, PEEK isolators
Ceramic (ZrO21)) isolators (no insulation on active probe), 316L stainless steel
