ircon Modline 4 Installation And Operation Manual Download

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Section 3– OPERATION

3.1 INTRODUCTION

The following instructions explain how to place the
MODLINE 4 system in operation. Most of these
instructions are related directly to IRCON components.
If you are using other components be sure to follow
any special instructions provided by the manufacturer.

For information and suggestions on various
measurement situations, refer to the Applications
Guide (Section 6) for your instrument series.

If you run into any problems, review the installation
procedures. Make sure you have completed all
wiring and observed all precautions. Refer to the
trouble shooting instructions in Section 4 if trouble
persists.

3.2 INITIAL ADJUSTMENT

Before turning on power, observe the control
settings on the back panel of the MODLINE 4 and
any indicators, controllers or other instruments in
the system. Fig 3.1 shows the location and brief
descriptions of the MODLINE 4 controls.

If the MODLINE 4 has a Peak Picker (Block D of
Model No. = 1), it must be in the Direct Mode for
the initial observations. The Peak Picker Plug
(Fig. 3.1, bottom) must be in its jack. If you have
wired an external switch to this plug as in Section
2.1 3, the external switch must be open.

3.3 EMISSIVITY SETTING

The emissivity

(ε)

control setting of the MODLINE

4 must match the emissivity of the material being
measured to obtain accurate temperature readings.

If you know the emissivity value of the target
material, set the

control to the known value. You

are ready to proceed to the next section.

If you do not know the target emissivity, you can
determine it in several ways.

3-1

a. Refer to the tables in the Applications Guide
   (Section 6). Set the emissivity control as
   recommended for the material you plan to
   measure.

b, In a test setup, imbed an accurate thermocouple
   just below the front surface of a sample of the
   material to be measured and heat the sample.
   Simultaneously reading the temperature shown
   by the thermocouple (in a stabilized temperature
   condition) and observing the surface of the
   MODLINE 4, adjust the emissivity control until
   the meter reading obtained corresponds to the
   thermocouple temperature.

c. In a test setup, apply a uniform coating of a material
   with known emissivity to a part of the surface of
   a sample of the material to be measured.

   With the emissivity control set to the known
   emissivity of the coating, heat the sample and
   observe the temperature (in a stabilized tem-
   perature condition) of the coated area, Now view
   the uncoated surface and adjust the emissivity
   control until you read the same temperature. The
   new setting is the true emissivity of the uncoated
   surface.

d. If you are unable to arrive at a suitable value,
contact IRCON Applications Engineering. We can
advise you of the correct emissivity setting from
either laboratory tests on the sample you submit
or from previous experience.

While all MODLINE 4 instruments are capable of
emissivity settings of 0.10 to 0.99, it is not always
adviseable to use the lower emissivity settings.