Doc. CEI12166
Rev. 1
Pag. 35 Of 47
3 THE HELL, IT DOESN’T WORK
3.1
I
NTRODUCTION
Sometimes, when my ears whistle, I wonder if it is because of some of my customers being angry at us
because the test set doesn’t work: according to Murphy’s law, when it was most necessary. We at ISA
do our best efforts to filter the so-called infant mortality of electronic components prior to delivery of
all our test sets; and this after extensive testing of prototypes and pre-production units.
Yet, sometimes faults occur, because everything dies, including electronic components; so, please,
before shooting at us, see if the following instructions can serve you to fix the problem. If not, e-mail us
the problem, not forgetting to mention the unit’s serial number: our business is to minimize your
downtime. My e-mail address is:
[email protected]
Last, our experience is that our test sets withstand very heavy duty cycles for long wiles, if correctly
used; most problems arise because of:
. Lack of grounding in the mains supply;
. Severe spikes on the mains supply (spikes are not always so kind to respect standard limits): in case of
doubt, use the internal battery;
. Transit, with the associated drops and thermal cycling;
. Errors, such as the connection to live wires.
Please mention in your e-mail how did the fault occur: this serves us for our continuous improvement
program.
