STB8827
Series Operation Manual Chapter 3 Introduction to [MEAS]
3.7.3
39
Set nominal value of tolerance mode
When the tolerance mode is selected as the limit mode of the primary parameter,
it is necessary to set the nominal value. The nominal value can be any one within
the display range.
When the sequential mode is selected as the limit mode the primary parameter,
the nominal value can be set, but it is not necessary to use it under this mode.
Operation steps for setting the nominal value
1) Move the cursor to
NOM
.
2) Use numeric keys to input nominal value. After inputting the data, the
following soft keys (
p
,
n
,
µ
,
m
,
k
,
M
,
*1
) can replace the
[ENTER]
key to
input the nominal value. When using [ENTER] to input the nominal value, the
default unit is the same as that input last time. Press
*1
to input nominal
value, the instrument will select F, H or
Ω
as the default unit of the nominal
value according to primary parameter.
3.7.4 Comparator function ON/OFF
STB8827
can set 9 bin limits of primary parameters and 1 bin limit of
secondary parameters. The tested results can be sorted into 10 bins
(BIN 1 to BIN 9 and BIN OUT) at most. If the primary parameter of DUT is within
the limit range from BIN 1 to BIN 9, but the secondary parameter is out of the
limit range, in this case the DUT will be sorted into aux bin.
When
STB8827
installs the HANDLER interface and it is used in the automatic
sorting system, the compare function will be especially useful.
Operation steps for setting the compare function ON/OFF
1) Move the cursor to
COMP
, the following soft keys will be displayed.
ON
OFF
2) Use above soft keys to set the compare function as ON or OFF.
3.7.5 Auxiliary bin ON/OFF
When it is necessary to sort the secondary parameters, the limits of the
secondary parameter can be set in
HIGH
and
LOW
of 2
nd
.
Three cases may occur in the process of secondary parameter sorting:
On
<LIMIT TABLE SETUP>
page, no low / high limit of the secondary
parameters has been set.
On
<LIMIT TABLE SETUP>
page, the low/high limit of secondary
parameters has been set but
Aux
function is set as OFF.
In this case, only those components whose secondary parameters are qualified
can perform primary parameter sorting according to sorting limits. If the
