810-0105-D01 Datasheet, PDF (2/4 Pages) Magnetrol International, Inc. – Kotron® Model 810 RF Point Level Switch

TECHNOLOGY
The amount of capacitance developed in any vessel is
determined by the size (surface area) of the probe, the
distance from the probe to its ground, and the dielectric
of the medium being measured. Considering that the
probe’s mounting position is fixed, and that the dielectric
value of the medium is constant, then the amount of
capacitance developed in any vessel becomes dependent
upon the amount of the probe which is covered by
the media.
As media rises and falls in the tank, the amount of capaci-
tance developed between the sensing probe and the
ground also rises and falls. This change in capacitance is
measured in the electronics. When the capacitance mea-
surement is the same as the setpoint, an alarm occurs.
SPECIFICATIONS
Supply voltage
120 VAC, 50–60 Hz (+10%, -15%)
240 VAC, 50–60 Hz (+10%, -15%)
24 VDC (±10%)
12 VDC (±10%)
Power consumption
120 or 240 VAC Less than 5 volt-amps
12 or 24 VDC 1 watt maximum
Zero range
0 pF minimum to 500 pF maximum
Fixed differential
0.5 pF
Output relays ( reversible DPDT)
AC 5 amp @ 250 VAC resistive
DC 5 amp @ 30 VDC, 0.5 amp @ 125 VDC resistive
Response time
100 milliseconds
Repeatability
Better than 1.0%
Ambient temperature
Electronics -40° to +160° F (-40° to +70° C)
Operating process pressure/temperature
3500 psig @ +100° F (240 bar @ +40° C)
1750 psig @ +200° F (120 bar @ +95° C)
Temperature coefficient of set point
-40° to +160° F (-40° to +70° C) ±.01% per degree F of setpoint
(±.018% per degree C of setpoint)
AGENCY APPROVALS
Agency
FM
Approved Model
All models
Protection Method
Explosion Proof
CSA
All models
Explosion Proof
Area Classification
Explosion proof with intrinsically safe probe circuit
Class I, Div. 1, Groups C & D
Class II, Div. 1, Groups E, F, & G
General purpose NEMA 4X
Explosion proof with intrinsically safe probe circuit
Class I, Div. 1, Groups C & D
Class II, Div. 1, Groups E, F, & G
General purpose TYPE 4X
These units have been tested to EN 50081-2
and EN 50082-2 and are in compliance with
the EMC Directive 89/336/EEC.
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