Hach FP 360 sc Manuel D'utilisation De Base page 13

SENSOR SETUP (Continued)
SELECT SENSOR (if there is more than one sensor)
DIAG/TEST
PROBE INFO
SENSOR NAME Device name
EDIT NAME
SERIAL NUMBER Device serial number
RANGE 0 to 500 or 0 to 5000
MODEL NUMBER Item no. Sensor
CODE VERSION Sensor software
COUNTER
OPERATING
Operating hours counter
HOURS
MAINTENANCE Counter counting down days
BULB CHANGE Counter counting down days
TEST/MAINT
SET OUTMODE Equipment output behavior in the SERVICE menu
HOLD
ACTIVE
SET
TRANSFER
SIGNALS
LAMP CURR Flash lamp intensity
DIAG / TEST Zero point and slope check with external standards
READING
OFFSET
CUBE CAL
Password-protected access for the service
Calibration
Factory calibration
The calibration curve zero point and slope are preset. Retrospective
calibration of these basic settings is generally not required outside of the
inspection intervals.
Do regular zero point checks to make sure that impurities or faults are
being detected (refer to Check the zero point on page
If the zero signal increases due to the measuring medium components
or the installation conditions, you can compensate for this influence via
an offset correction. Carry out a lab analysis of the sample to do this. If
there is no PAH/oil contamination in the measuring medium, enter the
measurement value shown by the device as the offset (refer to
the zero point (OFFSET) on page
Process calibration/adjustment
The sensor is pre-calibrated with various concentrations of a special
calibration standard in ultra-pure water. These ideal measurement
conditions rarely occur in reality. The measurement values shown are
qualitative trend indicators if no adjustment is made to the on-site
measurement conditions.
If you require quantitatively correct measurement values, either a
contrast adjustment or a multi-point calibration needs to be carried out.
Both of these operations must be carried out on site using lab analysis
data. Basic prerequisites for quantitative measurements are precise
knowledge about the oil type in occurrence and constant measurement
conditions, e.g. in cool water in a heat exchanger. If several oils are
present in varying quantities, it is generally not possible to carry out a
quantitative measurement.
If the measurement conditions change, you must check the accuracy of
the results again through lab analyses and make any adjustments where
necessary.
14).
Adjust
15).
English 13