Multi 3620 IDS pH value
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5.2.4 Manual calibration (ConCal)
Make sure that in the sensor menu, Buffer menu, the
ConCal
buffer set is cor-
rectly selected (see section 11.1.1).
Use any one to five buffer solutions in ascending or descending order.
17 When measuring without temperature sensor:
Measure the temperature of the buffer manually and enter it with
<><>.
18 Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
The [AR] status indicator is displayed. The measured parameter
flashes.
19 Wait for the measurement with stability control to be completed or ter-
minate the stability control and take over the calibration value with
<ENTER>.
The calibration display for the next buffer appears (voltage display).
20 If necessary, use <M> to finish the calibration.
The calibration record is displayed.
or
Switch to calibration with the next buffer with <ENTER>.
Calibration is automatically completed after the last buffer of a buf-
fer set has been measured. Then the calibration record is dis-
played.
The calibration line is determined by linear regression.
If single-point calibration was set in the menu, the calibration pro-
cedure is automatically finished with the measurement of buffer
solution 1 and the calibration record is displayed.
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