Hach-Lange pHD sc - Manual (Page 21)

15
Operation
SIGNALS
SENSOR SIGNAL: Displays the sensor output in mV
SENSOR ADC COUNTS: Displays the sensor ADC counts
TEMP ADC COUNTS: Displays raw data for temperature ADC counts. ADC counts are comparable to A/D counts and
are for sensor electronic diagnostic purposes only.
ELECTRODE STATE: Identifies the state of the electrode (good or bad) depending on whether the impedance is within
preset limits.
ACTIVE ELECT: Displays the impedance (Mohms) of the active electrode if Imped Status is set to Enabled.
REF. ELECTRODE: Displays the impedance (Mohms) of the reference electrode if Imped Status is set to Enabled.
IMPED STATUS: Sensor diagnostic. Choose Enabled or Disabled.
COUNTERS
SENSOR DAYS: displays the cumulative days the sensor has been in use.
RESET SENSOR: Allows the sensor counter to be reset to zero.
ELECTRODE DAYS: Cumulative days the electrode has been in use.
4.6 ORP Sensor Setup Menu
SELECT SENSOR (if more than one sensor is attached)
CALIBRATE
1 POINT MANUAL
Calibration against a single known sample.
TEMP ADJUST
Adjust the displayed temperature by up to ± 15 °C.
DEFAULT SETUP
Restores the system to the original factory calibration.
CONFIGURE
EDIT NAME
Enter up to a 10-digit name in any combination of symbols and alpha or numeric characters. Press ENTER when the entry
is complete. The name will be displayed on the status line with the measurement value.
SELECT SENSOR
Choose from the displayed sensor type (pH or ORP).
TEMP UNITS
Choose from the displayed options (°C or °F).
LOG SETUP
Choose SENSOR INTERVAL to set the sensor log interval or select TEMP INTERVAL to set the temperature log interval.
AC FREQUENCY
Choose 50 or 60 Hz depending on the power line frequency for optimal noise rejection. Default is 60 Hz.
CONFIGURE (continued)
FILTER
Select 0–60 second signal averaging time.
TEMP ELEMENT
Select type of temperature element from the displayed choices.
4.5 pH Sensor Setup Menu (continued)