Hach pH Manuel D'utilisation page 13

Section 4 Operation
4.1 User navigation
Refer to the controller documentation for keypad description and navigation information.
4.2 Configure the sensor
Select a sensor name and the type of sensor. Change options for measurement, calibration, data
handling and storage.
1. Push menu, then select SENSOR SETUP > [Select Sensor] > CONFIGURE.
2. Select an option.
Option
EDIT NAME
SELECT SENSOR
DISPLAY FORMAT For pH sensors only—changes the number of decimal places that are shown on the
TEMP UNITS
LOG SETUP
AC FREQUENCY
FILTER
TEMP ELEMENT
SELECT BUFFER
PURE H2O COMP
CAL DAYS
SENSOR DAYS
Description
Changes the name that corresponds to the sensor on the top of the measure screen.
The name is limited to 12 characters in any combination of letters, numbers, spaces or
punctuation.
Selects the type of sensor (pH or ORP).
measure screen to XX.XX (default) or XX.X.
Sets the temperature units to °C (default) or °F.
Sets the time interval for data storage in the data log—5, 30 seconds, 1, 2, 5, 10,
15 (default), 30, 60 minutes.
Selects the frequency of the AC power supplied to the controller (50 or 60 Hz). If the
power to the controller is 120 VAC, select 60 Hz. If the power to the controller is
230 VAC, select 50 Hz.
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.
pH sensors—sets the temperature element for automatic temperature compensation to
PT100, PT1000, NTC300 (default) or MANUAL. If no element is used, the type can be
set to MANUAL and a value for temperature compensation can be entered (manual
default: 25 °C).
ORP sensors—temperature compensation is not used. A temperature element can be
connected to measure temperature.
For pH sensors only—Selects the buffer solutions used for calibration. Options: pH 4, 7,
10 (default) or DIN 19267 (pH 1.09, 4.65, 6.79, 9.23, 12.75)
Note: Other buffer solutions can be used for calibration.
For pH sensors only—adds a temperature-dependent correction to the measured pH
value for pure water with additives—NONE (default), AMMONIA, MORPHOLINE or
USER DEFINED. For process temperatures above 50 °C, the correction at 50 °C is
used. For user-defined applications, a linear slope (default: 0 pH/°C) can be entered.
Sets the calibration interval (default: 60 days).
Note: A warning shows on the controller display when the number of days since the
sensor was calibrated is more than the calibration interval.
Sets the sensor replacement interval (default: 365 days).
Note: A warning shows on the controller display when the number of days the sensor
has been in operation is more than the sensor replacement interval.
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