Rockwell Automation 13DJ3 Liquid Level Controls - Manual

Installation Instructions
PHOTOSWITCH® Liquid Level and Resistance Sensing Control
Bulletin 13DJ3-3000
IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.
Product Data
Description
The PHOTOSWITCH Bulletin 13DJ3 Series 3000 is a high sensitivity
Liquid Level Control designed to detect the level of conductive liquids
or solids with a moisture content as low as 5%.
Features
• Very high sensitivity—up to 60 megohms cm liquid resistivity
• Compact, all solid state, plug-in, modular design for reliability
with flexibility
• DPDT EM relay and 12V DC solid state outputs. Optional solid
state logic outputs
• Low probe voltage isolated from line voltage
• Fast response time
• Wide selection of probe assemblies
• All molded parts of rugged, impact resistant polyphenylene oxide
(PPO) and polystyrene (PS)
• Heavy-duty easy to wire terminals
• High voltage connections isolated from low voltage
• Ambient temperature range: -40 to 135°F (-40 to 57°C)
General
The Bulletin 13DJ3 Series 3000 Conductive Liquid Level Control is
designed to provide a reliable level detection of conductive liquids or
solids. No moving parts or floats are required. Metal probe rods are
placed in the conductive liquid at the desired levels. The liquid or solid
conductive material completes the circuit between the probe rod or
rods to the metal material container. If the container is non-conductive
(fiberglass, cement, etc.), an additional probe rod is used as a grounding
probe to complete the electrical circuit. Completion of the circuit will
cause the output relay to operate. The relay contacts may be used for
pump, valve, or motor control; audible and/or visual level indication.
The controls will operate over a resistivity range of 0 to 60
MegOhms cm. This permits the sensing of liquids or solids with very
low conductivity such as antibiotics, refrigerants, or sand with a
moisture content as low as 5%.
In addition to high sensitivity, the control has a fast response time and
can be wired for electronic control latching on certain applications,
allowing the use of both sets of relay contacts for external loads.
A solid-state output signal can be obtained from the control
simultaneously with a relay output. This signal can be used for
electronic counting, data logging, or feeding information to a
computer.
The control has protection against false operation due to line voltage
transients, line voltage dropouts of 1/2 second or less, or during initial
power up. These features allow the 13DJ3 Series 3000 Control to be used
in solving the more difficult industrial level applications.
Resistance Sensing Control
PHOTOSWITCH Bulletin 13DJ3 is also designed to be used as a resistance
sensing control. In this application the control operates as an electronic
switch which converts the minute current flow through delicate
mechanisms or extremely light contacts into a switching output
capable of handling relatively heavy electrical loads. The maximum
sensitivity of the control when used for resistance sensing is 15
megohms.