Automatic, Single- And Two-Point Calibration (Ph Only) - ABB AX416 User Manual

Single and Dual Input Analyzers for pH/Redox (ORP)
AX416, AX436, AX460, AX466 & AX468

4.1.4 Automatic, Single- and Two-Point Calibration (pH Only)

Auto
1-Pt
-----
A: Buffer Method
4. 0 0
pH
25. 0 Deg.C
A: Immerse Buf.1
mV
175
#### 100% ####
pH
4. 0 1
A: Cal. Buffer 1
Yes
-----
A: Abort Cal.
Calibration Min.
Message
Calibration
40 to 70%
Passed
Calibration Low
60 to 90%
Slope
Calibration
0%
Failed
Table 4.1 Calibration Messages
IM/AX4PH Issue 9
Sensor A: Buffer Method (pH probes only)
Select the type of automatic calibration required:
Auto 1-Pt - Automatic, single-point calibration
Auto 2-Pt - Automatic, two-point calibration
Calibrate Buffer
Immerse Sensor A in the buffer solution.
Press the
Note. To abort calibration, press the
complete - see below.
The center display line shows the measured sensor output in millivolts.
As calibration procedes, a progress indicator appears in the lower display line. When
the measured sensor output stabilizes, the lower display line shows
##### 100% #####.
The display then changes for 2 seconds to show the temperature-corrected buffer
value in the upper display line, then advances automatically to the next frame.
Two-point calibration selected - continued on next page.
A: Immerse Buf.2
Single-point calibration selected - continued on next page.
A: Calibration
Abort Calibration
Select Yes or No.
A: SENSOR CAL.
selected - return to the main menu.
Yes
A: Immerse Buf.2
selected - calibration continues.
No
Max.
105% The new calibration coefficients are
accepted
60 to 90% The new calibration coefficients are
accepted
40 to 70% The new calibration coefficients are
ignored and the last known valid
calibration coefficients are used
or Calibrate Buffer 1
(Single-Point Calibration)
key to initiate calibration.
key again at any time before calibration is
Explanation
(Two-Point Calibration)
Action
None
The electrode pair are becoming fatigued -
replacement is recommended
Check buffer values and repeat buffering.
If the fault persists, replace the electrodes
4 SETUP
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