Manual Calibration (Concal) - Xylem SI Analytics Lab 855 Operating Manual

Lab 855
ba77143e02 12/2017
15. If necessary, finish the calibration procedure as a two-point calibration
with <M>.
The calibration record is displayed.
or
Continue calibration using the next buffer with <ENTER>.
Continuing with three-point calibration
16. Thoroughly rinse the pH electrode with deionized water.
17. Immerse the pH electrode in the third buffer solution.
18. When measuring without temperature sensor: Enter the temperature of
the buffer with <><>.
19. Start the measurement with <ENTER> .
The measured value is checked for stability (stability control).
The [AR] status display flashes.
The electrode voltage (mV) or the nominal value of the buffer (setting: see
section 7.1.1 C
20. Wait for the measurement with stability control to be completed or termi-
nate the stability control and take over the calibration value with
<ENTER>.
The calibration record is displayed.
5.2.4

Manual calibration (ConCal)

Use any buffer solution for the single-point calibration. The calibration will be
the more accurate the nearer the pH value of the buffer solution is to that of the
test sample.
Use the following buffer solutions for two-point calibration:
• one buffer solution with pH 7.0 ± 0.5
• any other buffer solution
1. Start the calibration with <CAL>.
The calibration display for the first buffer appears.
2. When measuring without temperature sensor: Temper the buffer or
measure the current temperature.
pH
C T
2
4
AutoCal TEC
HANGING THE SETTINGS FOR P
3
8
° C
TP
H
MEASUREMENTS
pH value
, page 28).
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