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2. INTRODUCTION
2.1 Inspection
Examine the shipping carton for any sign of damage. Inspect the
unit and any accessories for damage. If there is any damage then
consult your distributor immediately.
2.2 Description
The Martindale IRC325 has the following functions and features:
Easy to use single button image capture
4.5 cm colour TFT display
Blended image for fast troubleshooting
Temperature range -20ºC to 380ºC
2.3 Accessories
The IRC325 come with the following accessories:
3 x 1.5V AA alkaline batteries
Instructions
2.4 Battery Installation
Refer to Section 4.1 (Battery Replacement) for battery installation
instructions.
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3. OPERATION
3.1 Low Battery Indication
If the symbol is displayed, the battery needs replacing as
measurement accuracy can no longer be guaranteed (See section
4.1 Battery Replacement).
3.2 Description of Display
Scan mode
Hold mode
1
2
4
5
1
Measured temperature at crosshair
2
Battery level indication
3
Crosshair
4
Emissivity value (fixed at 0.95)
5
Indicates image is held
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5
3.3 Power On/Off
Press the
button to turn on the IRC325.
The screen will display MARTINDALE ELECTRIC for approx. 10
seconds as the unit warms up.
To turn off, press
for >2 seconds. The screen will briefly display
POWER OFF.
3.4 Auto Power Off
The IRC325 will automatically power off after 5 mins if not in use.
3.5 Measurement and Scanning
To scan an object or surface press and hold the IRC325 trigger.
HOLD
will no longer be displayed.
Move the IRC325 until the screen crosshair is aligned with the area
of interest.
The temperature at the crosshair centre will be displayed.
Releasing the trigger will hold the image and the displayed
temperature.
3.6 Measurement Considerations
The IRC325 has a fixed surface emissivity setting of 0.95. This
must be considered when measuring temperatures of surfaces
with surface emissivity values other than 0.95. See section 3.7
for typical surface emissivity values of various materials.
The distance/spot ratio of the IRC325 is 15:1. At a distance of
15 feet for example, the spot diameter would be 1 foot. This
must be considered when making temperature measurements
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because the measured temperature is the average temperature
within the area of the spot circumference. Therefore, for accurate
temperature measurement the spot circumference must be within
the target area. See figure 1.
Figure 1
Target
CORRECT Spot
area
INCORRECT
circumference
Allow time before use for temperature stabilisation if the IRC325
is moved between locations with differing ambient temperatures,
e.g. one location at 23ºC and another at 0ºC. Up to 30 minutes
may be required for extreme temperature changes.
Reflected background temperature can effect temperature
measurement. Very hot objects or very cold objects in the
vicinity of the target or object of interest can affect the apparent
temperature and measurement accuracy, especially when
surface emissivity is low.
3.7 Emissivity Values
The emissivity of the surface of a material is its effectiveness in
emitting energy as thermal radiation. Quantitatively, emissivity is the
