Routine Maintenance; Autocal Calibrator Tin Replacement; Autocal Calibrator Lead Replacement - PAC Alcor JFTOT II Manual

3. ROUTINE MAINTENANCE

3.1 AUTOCAL CALIBRATOR TIN RE-
PLACEMENT
1. The Tin in the Tin AutoCal Calibrator should
be replaced whenever:
a. it has been used to perform six AutoCals,
b. it is contaminated and seems erratic, or
c. the quantity is below the minimum level.
2. To remove the Tin, install the Tin AutoCal
Calibrator inverted between the upper fixed
bus bar and the lower floating bus bar.
3. Place a paper tissue or rag under the well to
catch the molten Tin.
4. Remove the thermocouple slide assembly
from the top of the scale. Touch the thermo-
couple tip to the bottom of the well containing
the Tin (the bottom is facing up).
5. While viewing the initial AutoCal display
"PERFORM CALIBRATION?" press F1
(remove stuck thermocouple) to apply power
to melt the Tin. At the same time lightly tap
the well until all the molten Tin has dropped
out. If required, repeat the procedure (press-
ing F1) until all the Tin has dropped out.
6. Set the thermocouple slide assembly back on
top of the scale assembly. The JFTOT will
turn the heater off and display the initial
AutoCal screen.
7. Remove the AutoCal Calibrator and wipe
inside of the well to remove any loose debris.
WARNING - Calibrator is hot.
Install the AutoCal Calibrator in the upright
position and refill with new Tin. The proper
amount of Tin for one filling is 1.6 ± 0.5 g (about
5 pellets). Adjust the thermocouple until the tip is
in contact with the Tin.
8. While viewing the initial AutoCal display
"PERFORM CALIBRATION?" press F1
(remove stuck thermocouple) to apply power
to melt the Tin. When the Tin has melted,
raise the thermocouple to remove it from the
Tin. The JFTOT will turn the heater off and
JFTOT II Maintenance Manual Rev. C
display the initial AutoCal screen. Clean the
tip of the thermocouple to remove any Tin.
Let the AutoCal Calibrator cool, then re-
move.
3.2 AUTOCAL CALIBRATOR LEAD
REPLACEMENT
1. The Lead in the Lead AutoCal Calibrator
should be replaced whenever:
a. it has been used to perform six AutoCals,
b. it is contaminated and seems erratic, or
c. the quantity is below the minimum level.
2. To remove the Lead, install the Lead
AutoCal Calibrator inverted between the
upper fixed bus bar and the lower floating
bus bar.
3. Place a paper tissue or rag under the well to
catch the molten Lead.
4. Remove the thermocouple slide assembly
from the top of the scale. Touch the thermo-
couple tip to the bottom of the well containing
the Lead (the bottom is facing up).
5. While viewing the initial AutoCal display
"PERFORM CALIBRATION?" press F1
(remove stuck thermocouple) to apply power
to melt the Lead. At the same time lightly tap
the well until all the molten Lead has dropped
out. If required , repeat the procedure
(pressing F1) until all the Lead has dropped
out.
6. Set the thermocouple slide assembly back on
top of the scale assembly. The JFTOT will
turn heater off and display the initial AutoCal
screen.
7. Remove the AutoCal Calibrator and wipe
inside of the well to remove any loose debris.
WARNING - Calibrator is hot.
Install the AutoCal Calibrator in the upright
position and refill with new Lead. The proper
amount of Lead for one filling is 5.5 ±1.0 g
(about seven pellets). Adjust the thermocouple
until the tip is in contact with the Lead.
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