Hach-Lange SPECTRO COLOR d-8 - Manual (Page 21)

BDA 387/2
22
C3.2 Pass/Fail Difference Measurement
The pass/fail program is designed for routine analyses of test elements. The instrument
monitors a given maximum colour tolerance without reading the display after each
measurement but just signals deviations outside the tolerance with a double-beep.
Preparing the measurement
• Turn spectro-color
®
and calibrate, if
necessary (see chapter C1).
• Select Pass/Fail- colour system (see
chapter B3.2).
• Press
the
ΔC key for colour difference
measurement. You will see this display
next:
• To measure a reference value, place
spectro-color ® on the reference and press
the measure button.
• To load a reference from the memory, press the MEM key (see chapter C3.1).
Pass/Fail-Measuring procedure
• Place
spectro-color ® on the sample.
• Press the measure button.
• Start of measurement is signalled with a
beep, end of measurement with two beeps.
• After the measurement, the result of the
pass/fail-measurement is displayed.
C3.3 Pass/Fail tolerance setting
In order to use the pass/fail option, it is necessary to set limit values. To do so, select item
[settings] in the main configuration menu and then item [pass/fail tolerance]. You will see the
following menu:
The
ΔE*-limit is shown in inverse display. Set
the desired
ΔE*-limit using the × or Ø keys
and confirm with ok . The cursor skips to the
first place after decimal point. The settings of
all other limit values are analogue.
Confirm the settings with ok .
Reference _
M
MEM
Measure button:
Measure reference
MEM : Reference
taken from memory
×
ΔC D65/10/SPIN
PASS / FAIL (ΔE*)
Grf
DIM
PASS
ΔE* = 2.00
×
Pass/Fail Toleranz
Ч
Ш
ΔE* = 5.00
+ΔL* = 10.00
‐ΔL* = ‐10.00
+Δa* = 1.00
‐Δa* = ‐1.00
+Δb* = 1.00
‐Δb* = ‐1.00
ok