Guidelines For Operation; User Navigation - Hach pHD sc Analog Differential pH/ORP Sensors Manuel D'utilisation

Section 4 Operation

4.1 Guidelines for operation

C A U T I O N
Personal injury hazard. The glass bulb or shank on the sensor can
break. Handle the sensor carefully to prevent injury.
• Remove the protective cap before the sensor is put into the process.
• When the sensor is removed from the process for >1 hour, fill the
protective cap with pH 4 buffer (recommended) or tap water and put
the cap on the sensor. Repeat every 2–4 weeks for extended storage.

4.2 User navigation

Refer to the controller documentation for keypad description and
navigation information.
Push the RIGHT arrow key on the controller multiple times to show more
information on the home screen and to show a graphical display.
4.3 Configure the sensor
Use the Configure menu to enter identification information for the sensor
and to change options for data handling and storage. The following
procedure can be used to configure pH or ORP sensors.
1. Push the MENU key and select Sensor Setup, [Select Sensor],
Configure.
2. Use the arrow keys to select an option and push ENTER. To enter
numbers, characters or punctuation, push and hold the UP or DOWN
arrow keys. Push the RIGHT arrow key to advance to the next
space.
Option Description
EDIT NAME Changes the name that corresponds to the sensor
on the top of the measure screen. The name is
limited to 10 characters in any combination of
letters, numbers, spaces or punctuation.
Option Description
SENSOR S/N Allows the user to enter the serial number of the
sensor, limited to 16 characters in any
combination of letters, numbers, spaces or
punctuation.
DISPLAY For pH sensors only—changes the number of
FORMAT decimal places that are shown on the measure
screen to XX.XX (default) or XX.X
TEMP UNITS Sets the temperature units to °C (default) or °F
TEMP pH sensors—sets the temperature element for
ELEMENT automatic temperature compensation to PT100,
PT1000 or NTC300 (default). 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.
FILTER 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.
PURE H2O For pH sensors only—adds a temperature-
COMP 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.
English 11