INSTRUCTIONS
The red lead: remove the protective inserts from the ends. Connect one end to the red
socket in the end of the probe. Connect the other end to one of the red (+) sockets on
the tester, it doesn’t matter which one.
The black lead with the crocodile clip is for testing item
s that don’t fit on the test plate
easily, see
TESTING LARGE ITEM
on the next page. Most items fit on the test plate
so you will rarely need the black lead.
Press the
ON/OFF
button so that it locks down. The needle should move to the far
right of the grey-
shaded area marked ‘P’ (P is for Platinum). Every test must start
with the needle in this position, a lower position indicates a low battery (see
CHANGING THE BATTERY
on the next page).
Remove the protective snap-cap from the probe.
Place the calibration sample on the test plate and ensure that the it is making firm
contact (if it is not, you must hold it down with your finger). Place the probe tip
gently
on the 18ct sample and wait for the needle to move settle in the 18ct (white) area.
This will take 2 to 5 seconds. Without moving the probe, adjust the calibration knob
until the needle is in the exact centre of the 18ct (white) area. Remove the probe tip,
carry out the test again (this time the needle will settle more quickly) to be certain it
calibrated correctly. If you are not certain, carry out the test a third time.
For standard testing of jewellery, this method of calibration is accurate enough. For
testing 20ct to 24ct see
TESTING HIGH-CARAT ACCURATELY
on the next page.
Now that the tester is calibrated, test your unknown samples in exactly the same
way,
except
that you must file the area to be tested (where you will place the probe
tip) with the steel file, to ensure you remove any gold plating.
There is no gold
jewellery tester that can test through plating!
Once you are certain the item is not
plated, further tests may be carried out without filing, just use the abrasive tip to
ensure it is perfectly clean.
Check the reading against the 18ct calibration sample whenever you turn the tester
on. If you test large batches of items, check it every dozen tests (keep the calibration
sample on the test plate). If, at any time, it does not read 18ct, calibrate it.
When you have finished testing, replace the snap-cap firmly or the probe will dry out
(or salt crystals will start to form around the tip).
The probe is not guaranteed, if it
dries out, you’ll have to buy another
so please take great care to replace the cap
firmly after use. We strongly suggest you keep a spare probe in stock.