Lumasense-technologies M67 Bedienungsanleitung PDF herunterladen (Seite 41)

M67, M67S Manual

40

12. Troubleshooting

SYMPTOM

POSSIBLE CAUSES

COMMENTS

No output, (Not even 4mA)

Reversed leads to Infraducer. Reversed

leads to other instruments in current

loop.

M67S indicator light is off.

Less than 4mA, greater than 0

mA.

Insufficient supply, voltage. See wiring

section.

Too many instruments on current loop

for capacity of supply.

See Section 8

Low temperature readings or

always reads 4 mA regardless

of target.

Target size too small.

Check sighting with M67S or

FOV specification.

Dirty window or lens.

See Section 11.1

Optical path obstructed.

Clear obstruction or choose

alternative sight path.

Target temperature too low.

Read Section 9 on emissivity.

Chapter 9.0.

Target emissivity much lower than

expected.

Target is not at correct focus distance.

(Especially critical with close focus

models)

With small target/close focus

models, aiming may require X-Y

positioning table for fine

adjustments.

May be attempting to view through

window or port made of material that

will not pass infrared radiation of

wavelength "seen" by the Infraducer.

Consult LumaSense.

Faulty Instrument.

Consult LumaSense.

Incorrect spectral response for

application. Infraducer may be "seeing"

through target.

Consult LumaSense for analysis.

Moisture condensation on optical

components.

Raise coolant temperature. See

Figure 12

Target hotter than expected. (This often

happens with first time infrared

thermometer users)

Verify target temperature with

contact type method. (Keep in

mind thermocouples may not

accurately determine surface

temperatures due to "heat-sink"

effects).

Emissivity of a target is higher than

expected.

Read Section 9 on emissivity.

Target size too small to fill field of view

and hot background is influencing

readings.

See Section 6.3

If target emissivity is less than 99,

reflection from nearby hot objects

influencing readings.

Block reflection paths to see if

readings drop to expected

temperature.

Improper aiming angle.

Long sight tube may be required

(Consult factory).

Aim away from source of heat.

Higher than expected

temperature readings.

Electrical noise in lead wires caused by:

1. Intense magnetic fields.

2. Improper selection of inter-

connecting cable.

3. Cable run in same conduit as AC

power lines.

See Section 8

Improper grounding of cable shield

and/or Infraducer housing, or cooling

jacket.

See Section 8

Noisy readings (rapid

fluctuations).

Infraducer mounting not secure.

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