Subject to change without notice
10
2. Set-up of the instrument
2. 1. Safety advice
Due to its measuring technique voltages up to 50 V are present at the 4
mm banana jacks, marked as E/S, C/D, and B/G. Therefore, it is assumed
that the
HM6042
will only be operated by qualified personnel which is
acquainted with the danger involved.
2. 2. General
The
HM6042
provides DC parameter characterization of 2- and 3-lead
semiconductor devices like transistors, diodes and MOSFETs. Five
characteristic curves displayed on the CRT’s screen and digitized to be
used for the calculation and indication of ten different parameters.
Depending on the parameter to be measured one or two cursors enable
the user to precisely select the point of measurement on one of the curves.
The microprocessor-operated instrument is extremely versatile, yet
remarkably easy to operate. Most of the instrument set-ups are done
automatically by the instrument according to the selected measuring
function.
To use the
HM6042
no special expertise is required. The instrument is
easy to set-up and operation is straightforward. Nevertheless, a few basic
guidelines should be followed in order to ensure problem-free operation of
the curve tracer.
2. 3. Selecting the line voltage
The instrument is able to operate with mains/line voltages of 115V AC and
230V AC. The voltage selection switch is located on the rear side of the
instrument and indicates the voltage as set. The desired voltage can be
selected using a small screwdriver.
Remove the power cable from the wall outlet prior to making any changes
to the voltage setting. Fuses have to be replaced by fuses with an
appropriate value (see table below) prior to connecting the power cable.
Both fuses are accessible by removing the fuse cover located above the 3-
pole power connector. The fuse holder can be released by pressing its
plastic retainers with the aid of a small screwdriver. The retainers are located
on the right and left side of the holder and must be pressed towards the
center. The fuse(s) then can be replaced by pressing it/them in until locked
on both sides. The use of patched fuses or a short-circuited fuse holder is
not permissible;
HAMEG
assumes no liability for any damage caused as a
result of incorrect fuse usage; all warranty claims become null and void.
Fuse type:
Size 5 x 20 mm; 250 V AC;
Must meet IEC specification 127,
Sheet III (or DIN 41 662 or DIN 41 571, sheet 3).
Time characteristic: time lag
Line voltage 115 V~ ±10 %:
Fuse rating: T 315 mA
Line voltage 230 V~ ±10 %:
Fuse rating: T 160 mA
