Dwyer ILA - Manual (Page 2)

DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
©Copyright 2014 Dwyer Instruments, Inc. Printed in U.S.A. 5/14 FR# R0-443516-00 Rev.3
MECHANICAL STAGE
All sensors come with a 3.3 ft (1 m) cable and a mounting nut.
The sensor can be mounted on brackets or cut outs of your own
design, or you can use the fixed and adjustable mounting
bracket accessories, which are shown below. (See Figure 3).
ELECTRICAL STAGE - WIRING:
Series ILA sensors are available as either two-wire or four-wire
units. J-type and 0 to 50 mV output models transmit the target
temperature as a 0-50 mV or J-Type thermocouple outputs plus
the internal sensor temperature as a 4-20 mA output. This
second 4 to 20 mA output can be used to ensure that the sensor
is being operated within the correct ambient temperature limits
and prevent damage caused by overheating or overcooling. It
can also be used to give an approximate indication of the air
temperature surrounding the sensor.
Note: The cable shield must be grounded at only one point,
which is usually at the controller/indicator. However, it can be
done at a junction box or other suitable location in the field area.
Operation
Once the sensor is in position and the appropriate power, air,
water and cable connections are secure the system is ready for
continuous operation by completing the following simple steps:
1. Turn on the power supply.
2. Turn on the meter, chart recorder or controller.
3. Read/monitor the temperature.
Important
Be aware of the following when using the sensor:
• If the sensor is exposed to significant changes in ambient
temperature (hot to cold or cold to hot) allow 20 minutes for
the temperature to stabilize before taking or recording
measurements.
• Do not operate the sensor near large electromagnetic fields
(e.g.
around arc welders or induction heaters).
• Wire must be connected only to the appropriate terminals.
MAINTENANCE
Our customer service representatives are available for
application assistance, calibration repair, and solutions to
specific problems. Contact our customer service representatives
before returning any equipment, in many cases, problems can
be solved over the telephone. If the sensor is not performing, as
it should, try to match the symptom to the problem below. If the
table does not help, call Dwyer for further advice.
2x Mounting holes M4 clearance
Fixed Bracket
25
10
40
50
15 26
16 DIA
2 2x Mounting holes M4 clearance
Fixed Bracket
25
10
40
50
15 26
16 DIA
2
FIGURE 3
Symptom
No Output
Erroneous
Temperature
Erroneous
Temperature
Erroneous
Temperature
Probable Cause
No power to sensor
Incorrect wire connection
Faulty sensor
Field of view obstruction
Solution
Check power supply
Check wire color codes
Verify cable continuity
Remove obstruction
TROUBLE SHOOTING
+ -
-
+
Display/Controller
4-20mA = Target
4-20mA
Temperature
Power Supply
+ -
-
+
4-20mA = Sensor
Temperature
Power Supply
-
+
mV/TC = Target
Temperature
Two-wire units (4 to 20 mA models)
Four-wire units (J Type or 0 to 50 mV Outputs)
OP-
OP+
PWR+
PWR-
PWR+
PWR-
Display/Controller
Display/Controller
4-20mA