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6 OPERATING PROCEDURES
24
Advanced Calibration Screen
LACO performs a multi-point calibration on the tester based on the customer's typical
helium concentration range. However, the user may likely need to perform an
advanced calibration in certain cases such as leak detector, test condition or test
environment changes.
This screen allows for a three-point calibration. Calibration point 2 should be at the
customer's default % concentration (or 10% if unspecified) and the other two values
should be at the extreme ends of the customer's measuring range. Run the three tests
from the test screen and then enter the data into this screen and press the calculate
slope button and a new slop and intercept values will be calculated. See the as-
shipped parameters printout in the end of this manual for a listing of all as-shipped
parameters.
Before calibrating first prepare a helium concentration sample by using a certified
helium mix or using the clear syringe assembly provide in the LSP-HCT-5 sniffer box.
For a 10% sample, set the syringe to 10mL and spray 100% helium into the syringe.
As the spray probe is removed cover the syringe opening with your finger and move
to a new (uncontaminated) area. Blow over tip area with retract syringe to 100mL
(with finger slightly removed) to obtain a 10% sample. Keep finger on syringe until
testing. For other concentrations adjust syringe volume settings accordingly.
Maintenance Screen
This screen allows user to enter date and time info and the USB upload utility if the
updated software needs to be downloaded.
LHCT03D & LHCT03D-R Operations and Maintenance Manual
LACO Technologies
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