51
sympHony
™
Meter User Guide
Appendix A
Special Meter Setup Menu Features
pH Setup Menu Features
Automatic buffer recognition
The sympHony pH meters are capable of automatically recognizing pH 1.68, 4.01,
6.86, 7.00, 9.18, 10.01 and 12.46 buffers during a pH calibration. During a calibration,
the meter uses the selected buffer set and the raw mV reading of the pH electrode
in the buffer to recognize and display the buffer value at the measured temperature.
The raw mV value must be about ± 30 mV from the theoretical mV reading of the
buffer in order for the meter to automatically recognize the buffer.
Buffer
mV Range
Buffer
mV Range
Buffer
mV Range
1.68
+285 to +345
7.00
- 30 to + 30
10.01
-207 to -147
4.01
+207 to +147
9.18
-99 to -159
12.46
-293 to -353
6.86
+38 to -22
Dissolved Oxygen Setup Menu Features
Barometric Pressure Compensation
The sympHony dissolved oxygen meters have an internal barometer that is used for
pressure compensated dissolved oxygen readings. The meter can also use manual
barometric pressure compensation if dissolved oxygen is being measured with a
submerged probe or in a pressurized vessel. The pressure must be entered as mm
Hg (mercury). 1 mm Hg = 0.03937 inch Hg = 1.3332 hPa (mBar) = 0.01934 PSI.
Salinity Correction
Automatic salinity correction for dissolved oxygen readings is available on sympHony
dissolved oxygen meters that have a conductivity mode. The meter uses the
conductivity value read by the conductivity probe to calculate the salinity correction
factor and applies the factor to dissolved oxygen readings reported as mg/L.
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