Hach PAH500 Manuel De L'utilisateur page 14

Section 4 Operation
4.1 User navigation
Refer to the SC1000 Controller User Manual for keypad description and navigation information.
4.2 Configure the sensor unit
1. Select SENSOR SETUP > [select sensor] > CONFIGURE.
2. Select an option.
Option
EDIT NAME
SCALE FACTOR
SELECT UNITS
SIGNAL
AVERAGE
LOG SETUP
SET FILTER
AC FREQUENCY
CAL DAYS
CLEAN DAYS
WARNING LEVEL Sets the setpoint for the CONC TOO HIGH (PAH reading is too high) alarm—0.0 to
SET DEFAULTS
14 English
Description
Sets the name of the sensor. The name of the sensor shows on the controller display
and in the log files. The default name is the model name followed by the last four digits
of the serial number.
Adjusts the PAH measurement by a multiplier (0.01 to 9.99, default: 1.00).
PAH = calibrated PAH × SCALE FACTOR
Use the SCALE FACTOR setting to adjust for interferences or sensitivity to different
fluorescent species.
Sets the measurement units that show on the controller display and in the log files.
Options: ppb, μg/L (default), ppm or mg/L
Sets the number of measurements used to calculate the average measurement shown
on the display. Options: 1 (default) to 16.
When SIGNAL AVERAGE is set to 1, signal averaging is disabled.
When SIGNAL AVERAGE is set to 2 or more, an average reading shows on the display.
For example, the measurement on the display is equal to the last and previous
measurement divided by two when SIGNAL AVERAGE is set to 2.
Signal averaging corrects for reading fluctuations caused by bubbles and/or larger
particles in the sample.
SENS INTERVAL—Sets the time interval at which the PAH reading (e.g., μg/L) is saved
to the data log. Options: DISABLED, 10, 15, 30 seconds, 1, 5, 10, 15 (default) or
30 minutes, 1, 2 or 6 hours. The measurement interval is 10 seconds.
RAW INTERVAL—Sets the time interval at which the sensor raw reading (mV) is saved
to the data log. Options: DISABLED, 10, 15, 30 seconds, 1, 5, 10, 15 (default) or
30 minutes, 1, 2 or 6 hours
Sets a time constant to increase signal stability. The time constant calculates the
average value during a specified time—0 (no effect, default) to 60 seconds (average of
signal value for 60 seconds). The filter increases the time for the sensor signal to
respond to actual changes in the process.
Selects the frequency of the AC power supplied to the controller (50 or 60 Hz). Default:
60 Hz
Sets the calibration interval. Options: 0 (disabled) to 999 days (default: 365 days).
Note: A CAL OVERDUE warning shows on the controller display when the number of
days since the sensor was calibrated is more than the calibration interval. If CAL DAYS
is set to 0, a CAL OVERDUE warning will not occur.
Sets the sensor cleaning interval. Options: 0 (disabled) to 999 days (default: 180 days).
Note: A CLEAN SENSOR warning shows on the controller display when the number of
days since the sensor was cleaned is more than the cleaning interval. If CLEAN DAYS
is set to 0, a CLEAN SENSOR warning will not occur.
9999.0 μg/L (default:100.0 μg/L PAH).
Sets the sensor settings back to the default settings.