BABBITT LS8500, Руководство пользователя

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www.babbittinternational.com Reference Manual
2021
4
LS8500 PRESENCE/ABSENCE SWITCH
1. DESCRIPTION
1.1 General Description
The LS8500 is an adjustable, radio frequency impedance sensing device, which can be used to detect the
presence or absence of material in a pipe. The basic unit is made up of a solid stainless-steel flange attached to
an explosion proof housing. Inside the explosion proof housing is a transmitter that is connected to the receiver
board by a twisted, shielded pair of wires. The receiver board may be mounted up to one mile from the sensor
flange. All calibration adjustments and indicators are at the receiver. The receiver also has the relay output and
an on-board fuse. The unit is calibrated in the absence of material and an on-board relay at the receiver
changes state when material is detected.
1.2 Specifications
Electrical
Power: 115 VAC (±15%) 50/60 Hz. 2 watts, standard.
(12 VDC, 24 VDC or 230 VAC optional)
Output: 2 Form C contacts, DPDT relay, 5 amp resistive
at 125, 250 VAC; 30 VDC
Fuse: On board, 250 mA @ 125 volts
Fail Safe: Selectable high or low level
Time Delay: Selectable: ON or OFF delay
Adjustable: 1/8 sec to 2 hours
RF Frequency: Approximately 1.3 MHz
Environmental
Enclosure: Transmitter: Cast Aluminum; Class I, Groups C & D; Class II,
Groups E, F & G
Receiver: Open printed circuit board can be put in
enclosure as required by application.
Temperature: Probe: -30° F to 180° F**
Electronics: -40° F to 185° F
Pressure: Probe: 200 PSI @ 75° F**
(**Higher ranges available upon request)
Construction: Probe: All wetted parts, 316 SS Teflon (or UHWMPE) and Viton.
Transmitter: Housed in cast aluminum explosion proof enclosure
Receiver: Printed circuit board mounted on plastic track provided
with each unit.
Specifications subject to change without notice.