4. Temperature Correction (Off-Set)
This step provides compensation the difference between the actual temperature on Welder Bar and that measured by
the controller.
This procedure should be performed if:
• A major system component was replaced i.e. control box/controller Welder Bar/heating element.
• Change of temperature scale from °C to °F or wise-versa.
Calibrated industrial face thermometer capable of measuring temperatures in the range 150°C / 300°F to 300°C / 570°F, is
required for this step.
a. Turn the main switch on the control box on "I" and wait until the display turns to Normal.
b. Press and hold both & keys for 3 seconds until appears in the PV line and 4 non-blinking dots on the SV
line.
c. Press several times until the symbol appears on the PV line.
d. Using the or keys, set the value on SV line to 50. Make sure it is not (-50).
e. To save your selection press & hold on until the display changes back to Normal display.
f. Wait for the PV line to stabilized (even if it's not equal to the SV Line).
g. Use the thermometer and measure the temperature on the surface of the Welder Bar at a point between 200 to 250mm (8" to
10") from the cable entry side.
A large difference can be expected between this measure and the value displayed on the PV line.
Make sure you measure the temperature at about the same point every time.
h. Subtract the thermometer temp from the temperature displayed on the PV line.
Record this value (it may be negative).
If this value is less than 5°C / 9°F offset calibration is completed.
i. Press and hold both & keys for 3 seconds until appears in the PV line and 4 non-blinking dots on the SV
line and then Press
several times until the symbol appears on the PV line.
j. If this is the first iteration the value 50 appears on the SV line (as set in step c. above).
k. Subtract the recorded value from the SV value (negative values are possible).
l. Using or to change the SV value to the value you calculated in (j.) above.
m. To save your selection press & hold on until the display changes back to Normal display.
n. Allow about 10 minutes for the welder temperature to stabilize.
o. Repeat the procedure form step (g.) above.
Example:
Temperature Controller PV display shows a temperature of 428°F.
Welder temperature is measured as being 394°F.
On our first iteration the difference is 428-394 = 34.
Performing step (h.) we get the value 50.
50-34 = 16 we decrease the SV Value to 16.
And press & hold
to return to normal display.
Waiting for the temperature to stabilize it again shows 428 on the PV line.
We now measure a temperature of 408°F i.e. the difference is 20.
At Step (h.) the SV value is 16 (16-20) = -4. We decrease the SV value to (-4).
5. Auto Tuning
This step calibrates the Temperature Controller to a new Welder.
Perform the Auto-tune procedure in the following cases:
• You performed Temperature Correction (Off-Set) (section 4 above).
• The controller or the Welder Bar/heating element are replaced.
• There's a significant difference of the environment (indoor vs outdoor etc.).
a. Make sure the Welder Bar is properly connected and the latch connector is secured.
b. Make sure it is safe to let the Welder Bar to heat up.
c. Make sure the Welder Bar temperature is below 150°C / 300°F.
d. Turn the Main Power switch on “I”.
e. Press and hold & then for 3 seconds until (red) appears in the PV line and Four (4) non-blinking lights appears
on the SV line.
f. Press until the (green) appears on the SV Line.
g. Press to start the Auto Tuning cycle.
h. The display changes to Normal Display.
i. An orange "AT" is blinking on the Left side of the display.
j. Wait until the "AT" stops blinking (this process may take about 30 min.)
• Should an "Err" message appear on the display (sometimes with a code):
Turn the Power switch off "O" wait for the bar to cool and repeat from step (d.) above.
k. When the "AT" indication extinguishes the Welder Bar is ready for work.
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Welding & Fabrication Tools FBW-Flat Butt Welding System Model II
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