Chroma 3300 - 3.3 Fuse; 3.4 Power Regulation; 3.5 Connecting Unknown; 3.6 The Contrast of LCD Display

Automatic Transformer Test System 3300/3302 User’s Manual
3-2
3.3 Fuse
It has one fuse installed in rear panel, replace the fuse and please watch for.
(1) Please turn off power and pull off power cord.
(2) Fuse spec. AC 100V 〜 120V → T2A 250V
AC 220V 〜 240V → T1A 250V
For the reason of safety and noise, it must use the power card with figure 3-1:
3.4 Power Regulation
As this instrument is belong to precision electronically test device, so the accuracy is passable
to be influenced lower by input power unstable after testing. There is ±10% changeable
power even in the laboratory, so we suggest that use the regulator in power and test devices
the only one way to avoid the reasons that cause by power unstable.
3.5 Connecting Unknown
For connecting 33XX LCZ to D.U.T (Unknown device) can through the BNC connector that
marks H
CUR
, H
POT
, L
POT
, L
CUR
. (If want to measure the PH and Turn Ratio of transformer
must use the terminator of Sec(+) and Sec(-), so usually need external test device. Notice
the L
CUR
and L
POT
connect to DUT should be at the same terminal, H
CUR
and H
POT
connect to
another terminal, when test transformer, the L
CUR
and L
POT
connect to the Np-side of
transformer, H
CUR
and H
POT
connect Np +side, Sec(+) connects to Ns +side and Sec(-) to
Ns-side.
3.6 The Contrast of LCD Display
To adjust the comparison of LCD can be used by the system configuration this function, but
be careful that the adjusting should be depended on personal acceptable brightness.