12
Nearly every electrical engineer has a hand held
digital clamp meter (Tongtester). We sometimes take
them for granted, until we damage them or “burn them
out”. If you incorrectly connect your clamp meter to a
circuit, or if you have the clamp meter on wrong setting,
you damage the meter and possibly hurt yourself. You
can also get into trouble if you try to measure the voltage
across a charged capacitor.
Clamp meter users frequently burn their meters by
trying to measure current the same way as they measure
voltage. Remember, you measure voltage
across
a
circuit, and current
through
a circuit. When you use the
current input, your clamp meter becomes a low
impedance circuit element.
Even if you correctly insert your clamp meter in to the
circuit, you can still damage your meter. Don’t try to
measure current in excess of your meter’s capacity.
Check the current capacity of the Clamp meter first.
If you are measuring current in industrial
environment, to prevent excess current from flowing
through your meter, always disconnect your test leads
from the circuit under test whenever you change Clamp
meter functions. Set your meter to the correct function,
say current, and its highest range for the setting. If the
reading is small, change the range to the next lower
range till the reading can be read with the best possible
accuracy. When measuring voltage, connect the test
leads before your apply power to your circuit. To be
safe, start by setting your meter to its highest range
first.
TAKE MEASUREMENT CAREFULLY AND YOU’LL
SPARE YOUR METER AND YOURSELF, SOME PAIN
WARRANTY
Each “KUSAM-MECO” product is warranted to be
free from defects in material and workmanship
under normal use & service. The warranty period is
one year (12 months) and begins from the date of
despatch of goods. In case any defect occurs in
functioning of the instrument, under proper use,
within the guarantee period, the same will be
rectified by us free of charges, provided the to and
fro freight charges are borne by you.
This warranty extends only to the original buyer or
end-user customer of a “KUSAM-MECO” authorized
dealer.
This warranty does not apply for damaged Ic’s,
fuses, disposable batteries, carrying case, test
leads, or to any product which in “KUSAM-MECO’s”
opinion, has been misused, altered, neglected,
contaminated or damaged by accident or abnormal
conditions of operation or handling.
“KUSAM-MECO” authorized dealer shall extend this
warranty on new and unused products to end-user
customers only but have no authority to extend a
greater or different warranty on behalf of “KUSAM-
MECO”.
“KUSAM-MECO’s” warranty obligation is limited, at
option, free of charge repair, or replacement of a
defective product which is returned to a “KUSAM-
MECO” authorized service center within the
warranty period.
