YOKOGAWA UV700G, User Manual

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<5. Calibration>
5-1
IM 12K01B02-01E
5. Calibration
Calibration is the adjustment so that the value indicated by the unit corresponds to the actual
value. It is necessary to obtain measurements of high accuracy and maintain the performance of
the unit.
5.1 Calibration Pattern and its Cycle
It is necessary to perform the calibration periodically.
Perform calibration by following the cycle shown below.
Measuring
item
Calibration pattern
Targeted calibration cycle
Before
operation
Every
week
Every
month
When
problems
occur
Procedure
Reference
UV/VIS
Common zero calibration 5.4.2
Common span calibration 5.4.3
Individual (UV) span calibration 5.4.4
TURB
(turbidity) Span calibration
5.5.2
—
—
—
: Recommended cycle, : Calibration as necessary – : Unnecessary
Perform the calibration in the order of “Common zero calibration,” “Common span calibration,”
(“Individual (UV) span calibration” as necessary), and “TURB Span calibration.”
l
Descriptions for each Calibration
Description Calibration
Common zero calibration
Common zero calibration of UV/VIS using the zero calibration solution
(distilled watter).
Put the zero calibration solution in the calibration tank. After the
measurement value has stabilized, perform calibration by operating the zero
button.
Common span calibration
Common span calibration of UV/VIS using the exclusive common span
calibration solution. Put the span calibration solution in the calibration tank.
After setting the calibration value of UV/VIS and the measurement has
stabilized, perform calibration by operating the span button.
If performing either one of calibrations, set the span calibration value to "0"
for the component that is not being calibrated. By doing this, the span
calibration for one component becomes possible.
Individual (UV) span
calibration
Individual span calibration of UV using the acid potassium phthalate
standard solution (standard solution for UV calibration).
Put the individual span calibration solution in the calibration tank. After
setting the calibration value of UV and the measurement has stabilized,
perform calibration by operating the span button.
Make sure to set the span calibration value of VIS to "0" before performing
the calibration.
Span calibration
Span calibration of turbidity using the span calibration solution.
Zero calibration is not required is not required as the common zero
calibration for UV/VIS is performed.
Put the span calibration solution for turbidity in the calibration tank. After
setting the calibration value of TURB (turbidity) and the measurement has
stabilized, perform calibration by operating the span button.