Hitachi CHROMASTER 5160 Instruction Manual page 293

Set an offset value.
Press [numerical] key (within [0] to [1][0][0][0]: Usually input
[0]), and then the [ENT] key.
* Settable range : 0 to 1000 AU, settable in increments
* Default value
■ Since the negative voltage input range is around -10 mV
with the usual data processor, a baseline lower than
-10 mV level may disable integration of some
chromatogram peaks (Fig. 3-2(a)). In this case, the
offset function adjusts the baseline, which is shifted to
the negative side, to a signal level within the input range
of the data processor (Fig. 3-2(b)).
(a) Offset Not Used
Fig. 3-2 Example of Offset Usage
4) Upon completion of offset setting, the first monitor screen
reappears.
Although the input numeral is not indicated at ABS, "+*" will
be suffixed to ABS value when a numeral other than 0 is
input.
First Monitor Screen
TIME WL
0.0 250
of 1
: 0
-10
(corresponding to
-10 mV)
ABS PROG
0.0000+＊ 1
3 - 11
3.2.1
(b) Offset Used
LAMP [I]
D2&W