For space sensing, mount the sensor where it will be unaffected by
heaUcool discharge or radiated heat sources. Spot sensing requires
the sensor to be in good contact with the surface being sensed. The
sensor can be inserted in a bulb well for immersion sensing.
CAUTION:
Sensor 'tiri g s .
control.
DO NOT
attemp' .
board!
e ade external from the
I .
CAUTION:
Disconnect power to control before wiring to avoid
POSSI
e
electrical shock or damage to the controller.
Additional cable can be spliced to the sensor cable to increase the
length beyond the standard 8 feet. It can be extended up to 400 feet.
The cable should be at least 22 AWG or larger to keep additional
resistance a minimum.
All splices 're lengths added to the sensor cable should be made
according to a "able wiring practices and should conform to the
National Electri Code and local regulations. Use copper conductors
only. Shielded cable is not required.
1. Before applying power, make sure installation and wiring
connections are correct.
2. Apply power to the control and observe one or more cycles of
operation.
3. If performance indicates a problem, check sensor resistance to
determine if sensor or control is at fault.
4. To check sensor resistance, disconnect sensor and measure the
resistance across the leads while measuring temperature at the
sensor.
Replacement Sensor - Order
Part No. 1309007-044
The 1309007-044 sensor is a negative temperature coefficient (NTC)
thermistor sensor. The sensor resistance decreases with temperature
. increase. It is .25 x 1.94 long with 8 feet #22 AWG cable. The
termistor has a reference resistance of 30,000 ohms at 77°F (25OC).
The schematic drawings and other information included in these
instructions are for the purpose of illustration and general reference
only. Ranco assumes no responsiblity for any unconventional
ap Iica' . co trol, unless such application has been approved
. _. y
Ranco.
Deg.C.
Deg.F.
RES. Nom.
-40
-40
1,010,000
-30 -22
531,000
-20 -4
291,200
-10
14 166,000
0 32
97,960
10
50
59,700
20
68
37,470
25 77 30,000
30
86
24,170
40
104
15,980
50 122
10,810
60 140
7,464
70 158 5,200
80 176 3,774
90 194 2,753
100 212 2,036
110 230 1,531
Figure 10:
Resistance
vs Temperature of 1309007·044. Sensor including 8 foot cable.
8115 U.S. Rt. 42 N.• Plain City, Oh 43064
~
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