Rockwell Automation 13DJ3 Liquid Level Controls - Manual (Page 9)

9
Resistor Selection
When the resistivity of the liquid is known, convert to ohms • cm and
select the range resistor that corresponds to the resistivity range in Table
5.
When the resistivity of the liquid is not known, immerse the high level
probe tip 1/16 in. (1.5 mm) into the liquid.
For operation with the relay energized with the probe immersed,
connect the Range 1 resistor (330 ohms) to Terminals 1 and 2. The relay
should energize. If it does not, use successively higher range resistors
until the relay energizes. If relay action is sluggish, use the next higher
range resistor.
For operation with the relay de-energized with the probe immersed,
connect the Range 1 resistor (330 ohms) to Terminals 1 and 3. The relay
should de-energize. If it does not, use successively higher range resistors
until the relay de-energizes. If relay action is sluggish, use the next higher
range resistor.
Note: For resistance sensing applications, use the values of
resistance sensing sensitivity listed in Table 6 in place of
probe circuit resistivity for selection of the proper range
resistor.
Note: Wiring for Ranges 1--2--3 differs from Ranges 4--5--6. Follow
wiring instructions in Wiring Diagrams in Figures 6--11.
Wiring
All external wiring should conform to the National Electric Code and
applicable local codes. See wiring diagrams for external connections.
Wire no smaller than 16 AWG is recommended.
Since the 13DJ3 control operates with liquids having high electrical
resistance, the insulation resistance of the wiring connecting the control
to the probe must be extremely high. It is important, therefore, to use
plastic insulated wire to insure that the insulation will not absorb
moisture or crack and permit leakage paths to develop. Wires insulated
with paper, cotton, asbestos, etc. must not be used. Series 63 sanitary
probes are furnished with a molded separable connector and 10 ft (3 m)
cable assembly.
ATTENTION
Do not run probe or reset leads in same
conduit with power lines or high current
carrying conductors.
Outline and Mounting Dimensions
Unless otherwise indicated, dimensions shown are in inches. Those in
parentheses are in millimeters.
Figure 3
Figure 4
.188
(4.8)
NEMA 1 #61- 3322- 3
3.938
(100) .875 (22.2)
5.25
(133.4)
5.938
(150.8)
7.25
(184.1)
4.875
(123.8)
.375
(9.5)
.688
(17.5)
5.938
(150.8)
.812
(20.6)
3.875
(98.4)
.375
(9.5)
.875 DIA. (22.2)
8 K.0.’S TOTAL
*
*
*
*
TYP.
1.188
(30.2)
1.063
(27)
*
*
NEMA 3, 4, 5, 12 & 13
#61- 4090
4
(101.6)
8.75
(222.2)
9.5
(241.3)
.375
(9.5)
6.25
(158.7)
4.875
(123.8)
.625 (15.9)
.312 (7.9)
HOLE (4)
8.25
(209.5)