804-R010-230 Datasheet, PDF (2/8 Pages) Magnetrol International, Inc. – Kotron® Sentinel Model 804 RF Level Transmitter

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 reference; and the
dielectric constant of the medium being measured.
Considering that the probe’s mounting position is fixed
and the dielectric of the medium is constant, then the
amount of capacitance developed in any vessel becomes
dependent upon the amount of the probe which is cov-
ered with media.
As the media rises and falls in the tank, the amount of
capacitance developed between the probe and the
ground reference also changes. The capacitance signal is
converted to a frequency proportional to the change in
level. The amplifier then converts this digital signal into
an isolated 4–20 mA analog output signal.
SPECIFICATIONS
Supply voltage
Power consumption
Ambient temperature range
Humidity
Accuracy
Repeatability
Linearity
Temperature effect
Operator interface:
Data entry
Display
Continuous Output:
Active signal
Passive signal
Range
Damping
Discrete output (SPDT) with gold flash contacts:
Set point range
Adjustable differential range
Time delay
Relay output:
AC
DC
Maximum remote cable length:
Standard
Intrinsically safe
120 VAC, 50/60 Hz (+10 – 15%)
240 VAC, 50/60 Hz (+10 – 15%)
24 VDC (±10%)
15 VA nominal
-40° to +160° F (-40° to +70° C)
99% non-condensing (electronics)
Better than ±1.0%
±0.1%
±0.5%
±0.01%/° F (±0.018/° C)
16-button keypad
2 line × 16 character LCD display
4-20 mA (isolated), reversible, 1000 ohms max. loop resistance
4-20 mA (isolated), reversible, loop resistance
dependent on power supply
5 pF minimum; 50,000 pF maximum
0-90 seconds
0-50,000 pF
0.5 pF minimum; 50,000 pF maximum
0-90 seconds level rising, level falling, both
10 amp @ 120/240 VAC resistive
10 amp @ 30 VDC resistive
0.5 amp @ 125 VDC resistive
2500 feet (760 meters)
800 feet (240 meters)
2