Hanna Instruments Edge - pH Measurement Operations; pH Measurement Modes

Operational Guide
27
Basic vs
Standard
pH mode
For optimum pH measurements, follow these steps:
1. Understand the benets and features of Standard and Basic Operation.
2. Set up edge™ meter by conguring preferences.
3. Calibration
4. Measurement
The “Standard” pH operation includes up to a 5-point buer calibration, use
of custom buers, choice of displaying 0.001 pH resolution, use of the full
diagnostic features of Calibration Check™ (that includes buers used, probe
condition, response time and messages indicating a contaminated buer
or pH sensor requiring maintenance during calibration). Additional Sensor
Check™ indicators are available if using HI 11311 or HI 12301 pH electrodes.
These include a continuous diagnostic to detect if the electrode is broken
or the reference junction has been compromised by sample contamination
or fouling. The Standard pH operation also includes full logging capability
including Interval, Manual log on demand and Manual log on stability.
“Basic” pH operation provides a simplied SETUP menu; there are no decisions
to make regarding the pH measurement itself. The meter will display 0.01
pH resolution and permit a 3-point buer calibration from the following
pH buers; 4.01, 6.86, 7.01, 9.18 or 10.01. Calibration Check™ and Sensor
Check™ features are limited to messages during calibration. Calibration
reminders are also not available. The GLP will still provide oset, slope,
buers used and a calibration date. The Basic pH operation includes Manual
log on demand and Manual log on stability (medium setting).
Note: When changing from Standard to Basic operation in SETUP, previous
calibration data will be cleared. A prompt will force the user to facilitate this.