Heuresis Pb200i - Testing the Accuracy and Precision of the Pb200 I

8
Testing the Accuracy and Precision of the Pb200i
The Pb200i should be tested for Quality Control (QC) before each inspection, every 4 hours, and when
the inspection is complete.
1. Start by placing the wooden block on top of the Pb200i case. Hold the device with the proximity
button against the wooden reference block, with the snout of the instrument centered on the paint
film nearest 1.0 mg/cm
2
. When the LED turns green, squeeze and hold the trigger, keeping the
device’s snout in firm contact with the block while continuing to hold the trigger. The reading will
automatically terminate when the device has determined whether the sample is classified as Pb
paint (Positive when Pb≥1.0 mg/cm
2
, or Negative when Pb<1.0 mg/cm
2
).
2. Compare the result to the value on the reference block and make a note of the reading.
3. Complete the test 3 times, then average the readings. The average (rounded to 1 decimal place)
of the three readings must fall between 0.8 and 1.2 mg/cm
2
(inclusive) for the Pb200i to pass its
QC check.
Figure 13a Figure 13b Figure 13c