Servomex NanoTrace DF-760E, Instruction Manual

Page: 86 / 182

82 DF-760E User Interface
Figure 72: Oxygen AutoSpan Recal
7.6.2.5 AutoSpan SetUp
Figure 73: Oxygen AutoSpan SetUp Screen
The AutoSpanSetUp screen allows for automatic span calibration or span checks of the
oxygen sensor at preset times. An optional warning period allows the user to disable the
AutoSpan function at critical measurement periods.
The AutoSpan Interval can be set for the frequency of spanning the oxygen sensor. The
date and time of the next scheduled AutoSpan is automatically calculated based on the
current AutoSpan Interval setting.
AutoSpan Timeout/Warning : The timeout allows a time for stabilization. If the required
stable period is not achieved, the AutoSpan is automatically aborted. The Pre-Span
warning is set to provide an advance warning of a AutoSpan, based the minutes entered.
AutoSpan Type : Allows the user to re-calibrate the oxygen sensor with each span or
merely to check if the span is within user specified limits.
A relay is available on the Oxygen Output Setup Screen (see page 97) to signal that a span
or zero calibration is taking place, and the analog output signal can also be frozen or
allowed to update during the calibration process.