Dwyer ILA User Manual

Series ILA In-Line IR Sensor

3 Ft CABLE

[1000]

4-1/16

[103]

15/32

[12]

M16 ULTRA FINE 1.0MM PITCH M16 ULTRA FINE 1.0MM PITCH

NUT

45/64 [18.0]

5/16 [8.0]

23/32

[18]

ø23/32

[18]

Sensor

BEST

GOOD

INCORRECT

Background

Target greater than spot size

Target equal to spot size

Target smaller than spot size

Distance: Sensor to object (inches)

Distance: Sensor to object (mm)

11.9

45.2

78.6

0.5

1.8

3.1

0 19.7 39.4

0 500 1000

Spot Dia.

(inches)

Spot Dia.

(mm)

D:S 15:1

Specifications - Installation and Operating Instructions

Bulletin E-90-ILA

Dwyer Series ILA non-contact sensors, measure

temperatures from 32 to 932°F (0 to 500°C) and provide a linear 4 to 20 mA, 0 to 50 mVDC or thermocouple output. The 2-wire signal is compatible with almost any indicator, controller, recorder, data logger, etc., without the need for special interfacing or signal conditioning. They are suitable for most materials such as food, paper, textiles, plastics, leather, tobacco, pharmaceuticals, chemicals, rubber, coal, and asphalt.

The Optical Chart

The optical chart indicates the nominal target spot diameter at any given distance from the sensing head and assumes 90% energy. (See Figure 1).

SPECIFICATIONS Temperature Range: 32 to 932°F (0 to 500°C). Accuracy: 1% of reading or 1°C whichever is greater. Emissivity: 0.95 (Fixed). Distance to Target Size Ratio: 15:1. Response Time: 240 ms. Ambient Operating Temperature: 32 to 158°F (0 to 70°C). Power Requirement: 24 VDC. Repeatability: 0.5% of reading or 0.5°C whichever is greater. Outputs: 4 to 20 mA, 0 to 50 mVDC, J type thermocouples. Cable Length: 3.3 ft (1 m). Spectral Response: 8 to 14 microns. Housing: Stainless steel. Weight: 3.35 oz (95 g). Agency Approval: CE.

FIGURE 1

PREPARATION STAGE

Ensure that the sensor is focused on the target only.

Distance and Spot Size

The size of the area (spot size) to be measured determines the distance between the sensor and the target. The spot size must not be larger than the target. The sensor should be mounted so that the measured spot size is smaller than the target. (See Figure 2).

Atmospheric Quality

Smoke fumes or dust can contaminate the lens and cause errors in temperature measurement.

Electrical Interference

To minimize electromagnetic interference or “noise” the sensor should be mounted away from motors and generators.

FIGURE 2

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyermail.com

Phone: 219/879-8000 www.dwyer-inst.com

MECHANICAL STAGE

2x Mounting holes M4 clearance

Fixed Bracket

15 26

16 DIA

x Mounting holes M4 clearance

Fixed Bracket

15 26

16 DIA

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+

WR+

PWR-

PWR+

PWR-

Display/Controller

4-20mA

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).

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:

. 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.

TROUBLE SHOOTING

Symptom

No Output

Erroneous Temperature

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyermail.com

Phone: 219/879-8000 www.dwyer-inst.com

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