740 Portable Suspended Solids
estimated value was used to set the instrument span. The take sample menu is used to
store the sensor signal relating to the calibration solution for later use.
From the Calibration menu, select Take Sample and press the OK key. With the sensor
immersed in the calibration solution, (The display value must be stable – this can be
checked when in measure mode) press the OK key. The 740 Monitor collects data for
the take sample operation for approximately 10 seconds, during this period do not
move the sensor. If the take sample process is successful, the monitor will return to
measure mode. If a problem occurs during the zeroing operation, an error message will
be displayed and the monitor will return to the Calibration menu.
10.8 Enter Sample Result
When the take sample operation has been carried out, and the correct value for the
calibration solution is known, the new calibration value can be entered using the Enter
Sample Result menu.
To enter the new calibration value, from the calibration menu, select the Enter Sample
Result menu and press the OK key. The calibration value can be set to a value
between 3 – 100% of the currently selected measuring range using the keys.
This value should be set to the value of the calibration solution. Once the correct value
has been set press the OK key. Pressing the MENU key will exit the Set Span
operation.
Note: The calibration value can only be set between 3 –100% of the display
range.
Page 30 of 46 172430IM-Iss07 Issue Date 23/10/2014
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