TES TES-133 - 5-7 ZERO-Ratio Function Operation; 5-8 Ratio - ZERO Function Operation

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5-7 ZERO-Ratio Function Operation
A. Use the current measured value as the reference value.
1. Press
key to store the dark current (
φ
d
), and subsequently
takes a measurement (
φ
in
), the LCD will read :
φ
=
φ
in
-
φ
d
2. Press key, the LCD will read : RATIO =
φ
φ
φ φ
in d
RATIO d
−
−
Where
φ
RATIO
is the total luminous flux into the shpere when
key is pressed.
B. Use the current reference value.
1. Press key to display the reference value (
φ
REF
).
2. Press key to store the dark current (
φ
d
), and subsequently
takes a measurement (
φ
in
), the LCD will read :
φ
=
φ
in
-
φ
d
3. Press key, the LCD will read : RATIO =
φ
φ
φ φ
in d
REF d
−
−
RATIO
ZERO
5-8 Ratio – ZERO Function Operation
A. Use the current measured value as the reference value.
1. Press key, the LCD will read : RATIO =
φ
φ
in
RATIO
2. Press key for the dark current
φ
d
and records a
measurement, the LCD will read : RATIO =
φ
φ
φ
in d
RATIO
−