Hanna Instruments HI 4521 - Manual (Page 41)

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by pressing . A pop-up menu will be displayed
on the LCD, in which the slope value can be set using
or . Press to save the
modified value or press to return to the Ion
Constants menu.
Note: If an ISE calibration was performed and a different Ion
Selective Electrode is selected (standard or custom), a
warning message appears on the LCD informing the user to
perform a new calibration or to select the previous ISE in
order to perform accurate measurements.
Concentration Unit
Accessing this option, the user can select the desired concentration unit for the measured ion or chemical compound.
The available concentration units are: ppt (g/L), ppm (mg/L), ppb (µg/L), mg/mL, M (mol/L), mmol/L and %w/v.
To set the Concentration Unit:
• Use or to select the Concentration Unit
option.
• Press and use or to highlight the
desired option.
• Press to confirm your selection or press to
cancel operation.
Sample ID – See pH Setup section.
Stability Criteria – See pH Setup section.
Log – See pH Setup section.
Note: The Logging Data Configuration option includes also the Ion Constants parameter. If you want it to appear
in the log reports, it must be enabled.
Alarm – See pH Setup section.
Note: The Alarm Limits (Low and High) are set in the selected concentration unit of the measured ion or chemical
compound and are displayed in a scientific format (value and value exponent).
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Log
This option allows the user to edit the settings related to the logging feature, as following:
Logging Type
Three logging types are available:
Automatic, Manual and AutoHold.
Automatic logging - the readings are logged automatically at constant
time intervals (see
Sampling Period option).
Manual logging ( log on demand)- the readings are logged each time
is pressed.
AutoHold logging - the readings are logged automatically at each
auto-hold event occured.
To set the sample logging type:
• Use or to highlight the Logging Type option.
• Press and use or to choose from
Automatic, Manual or Auto Hold.
• Press to confirm your selection or press to
cancel operation.
Logging Data Configuration
This option allows the user to select the parameters that accompany
a logged value:
Date/Time, Calibration Data, Sample ID, Instrument
ID, Operator ID, Company Name, Aditional Info 1 and Aditional Info 2.
To set the logging data configuration:
• Use or to highlight the Logging Data
Configuration option.
• Press and then use or to enable
the parameter by selecting Yes or to disable it by selecting No for
each option.
• Press to return to the previous menu.