YSI MultiLab 4010-1W, Руководство по эксплуатации

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pH value MultiLab 4010-1W
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5.2 pH calibration
5.2.1 Why calibrate?
pH electrodes age. This changes the zero point (asymmetry) and slope of the
pH electrode. As a result, an inexact measured value is displayed. Calibration
determines and stores the current values of the zero point and slope of the
electrode.
Thus, you should calibrate at regular intervals.
5.2.2 When do you have to calibrate?

Routinely within the framework of the company quality assurance

When the calibration interval has expired
5.2.3 Calibration procedure
The MultiLab 4010-1W provides 2 calibration procedures:

Automatic calibration (AutoCal)
The buffer solutions used are automatically identified during the calibration
procedure. The relevant nominal values are used automatically.
Prerequisite:
The buffer set used has been set in the meter (see section
9.1.2 B
UFFER SETS FOR CALIBRATION
, page 64).

Manual calibration (ConCal)
Any buffer solutions can be used. The nominal values of the buffer solutions
are manually entered by the user during the calibration procedure.
5.2.4 Carrying out automatic calibration (AutoCal)
Make sure that, in the menu for measurement and calibration settings (in the
menu pH/
<ENTER>
/ Calibration / Buffer ), the correct buffer set is selected
(see section 9.1.1 S
ETTINGS FOR P
H
MEASUREMENTS
, page 63).
Use one to five buffer solutions of the selected buffer set in any order.
Below, calibration with YSI buffers (YSI) is described. When other buffer sets
are used, other nominal buffer values are displayed. Apart from that, the proce-
dure is identical.
For most applications, automatic calibration (AutoCal) is the safest
and most convenient way of executing a calibration.
If single-point calibration was set in the menu, the calibration proce-
dure is automatically finished with the measurement of buffer solu-
tion 1 and the calibration record is displayed.