Sentry ST520 Instruction Manual page 20

Set the reference values in either of two methods：
5-2-1. Using the measured values and adjust it manually as
the reference values.
5-2-2. Using the previous values stored in memory and adjusts
it manually as the reference values.
The difference between method 5-2-1 and 5-2-2 is whether the
Data Hold was enabled before entering the set mode.（See
diagram 5-2b）
Note：
Color difference =（Measured value）–（Reference value）
Example:
⊿Ev = Ev
⊿x
⊿y
⊿u' = u'
⊿v' = v'
⊿CT = CT
Data
5-2-1.
Hold
Data
5-2-2.
NOT
Hold
– Ev
meas
– x
= x
meas
– y
= y
meas
– u'
meas
– v'
meas
– CT
meas
Using the
measured values
⊿
Hold for 3 secs.
Using the previous
values recorded
Diagram 5-2b
ref
ref
ref
ref
ref
(522)
ref
Adjust value
Ev x /u '
ref ref
/CT
ref
16
Reference Value
y /v'
ref ref r ef
(522)
MODE
Set the
Color
dirrerence
mode