Stability; Averaging; Alarms - Thermo Scientific Orion Versa Star Pro User Manual

Thermo Scientific

Stability

The Stability setting allows the operator to set when a measurement is recognized as stable by
the meter. When the Smart option is selected, the measurement resolution in conjunction with
an algorithm that evaluates measurement fluctuations are used to determine when the
measurement value is stable. When the Fast, Medium or Slow option is selected, only the
algorithm is used to determine when the measurement value is stable. Approximate mV per
minute values, estimated based on ideal measurement conditions, are shown below. These
values are theoretical examples only and actual mV per minute fluctuations will vary based on
individual measurement conditions.
Stability Setting
Smart Stability
0.1 resolution or 1 significant digit
0.01 resolution or 2 significant digits
0.001 resolution or 3 significant digit
0.0001 resolution or 4 significant digit
Fast Stability
Medium Stability
Slow Stability

Averaging

The Averaging setting allows the operator to select Automatic Smart averaging for faster
measurement stability or Off for no measurement averaging once the stability criteria is met.

Alarms

allows the operator to s
The Limit Alarm
measurements. If a measurement goes above the high limit value or below the low limit value, the alarm
is activated. For example, when the high limit is set to 8.500 pH and the low limit is set to 4.500 pH, the
Limit Alarm is activated when a measurement of 8.501 pH or higher or a measurement of 4.499 pH or
lower is observed in the measurement mode.
allows the operator to s
The Cal Due Alarm
performed within the specified calibration interval, the alarm is activated.
allows the operator to s
The Set Point Alarm
measurements. If the measurement goes above or below the base value by the entered offset value, the
alarm is activated. For example, when the base value is set to 7.000 pH and the offset value is set to
2.000 pH, the Set Point Alarm is activated when a measurement of 9.000 pH or higher or a measurement
of 5.000 pH or lower is observed in the measurement mode.

Use the Buzzer – Alarm setting in the
beep whenever an alarm is activated.

Appendix A
Approximate mV per Minute Fluctuation
et a high limit value and low limit value used to evaluate
et a calibration interval in hours. If a calibration is not
et a base value and offset value used to evaluate
Instrument Settings setup menu to enable an audible
Orion Versa Star Pro Meter User Manual
Channel Specific Settings and Features
7.6
2.9
1.0
0.4
7.6
2.9
1.0

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