Babbitt LS7000 Full-Featured Sensor - Manual (Page 5)

a) For dry materials, mount the LS7000 in the top of the vessel whenever possible. (This allows you to
lengthen the probe if necessary.)
b) Avoid mounting the LS7000 near the product inlet, vent return lines, dust collectors and vessel
discharge openings on dry materials. Turbulence around these areas can cause erratic detection unless
the probe is long enough. On old installations it might be wise to fill the vessel first to determine the
length or location of the probe. CAUTION: Always take safety precautions before opening vessels for
such inspection. We recommend a 36” top mounted high level probe in storage silos and a 24” in
smaller vessels such as use bins.
c) On gravity filled vessels, take into consideration the angle of repose formed by the product.
d) On dry product that flows like water (starch), when using the LS7000 to stop the flow by means of a
butterfly valve or knifegate, make sure the probe is long enough to allow time to close these slow
moving valves.
e) In small vessels where a good location is hard to find, it may be necessary to put a baffle plate between
the probe and the product inlet to keep product off of the probe as it fills. (A short time delay could
also solve this problem.)
C. Removing the Electronics
1) To remove the sensing card, simply unplug it from the power supply card. When reinstalling, this card is
made so that it cannot be plugged in backwards.
2) To remove the power supply card you must:
a) Disconnect supply power at main power source.
b) Remove sensing card.
c) Disconnect wires from terminal strip.
d) Remove green grounding screw.
e) Unplug blue antenna lead.
f) Hold the top of the card guide and lift out.
To reinstall, reverse the above procedure.
D. Typical Applications and Wiring Diagrams
As follows:
LS7000 TERMINAL LAYOUT
•
*NOTE: EACH LS7000 POWER SUPPLY IS INTENDED FOR ONLY ONE SUPPLY VOLTAGE. THIS
VOLTAGE IS PRINTED ON THE POWER SUPPLY BOARD. FOR 115 VAC OR 230 VAC UNITS, HOOK UP THE
HOT LEAD TO L1 AND THE NEUTRAL TO L2, WITH APPROPRIATE GROUND. FOR 12 VDC OR 24 VDC
UNITS, HOOK THE POSITIVE VOLTAGE TO L1 AND THE COMMON OR GROUND TO L2.
FIGURE 7.2
3
5 AMP RELAY CONTACTS
C2 NC2 NO2 NO1 NC1 C1 L2 L1 G
SUPPLY VOLTAGE*