Xylem MULTI 3400 MULTI-PARAMETER METERS - Manual (Page 18)

Operation Multi 3400i
18
4.2.2 Measuring the pH value
AutoRead AR
(Drift control)
The AutoRead function (drift control) checks the stability of the mea-
surement signal. The stability has a considerable impact on the repro-
ducibility of the measured values.
For identical measurement conditions, the following criteria apply:
1 Perform the preparatory activities according to section 4.2.1.
2 Immerse the pH electrode in the test sample.
3 Press the <
▲> <▼> keys until pH appears in the status display.
The pH value appears on the display.
4 When measuring without a connected temperature sensor:
Options:
z Determine the current temperature using a thermometer
and, while keeping the <RUN/ENTER> key depressed, en-
ter this temperature value with <
▲> <▼>.
z TP display indicator not displayed, socket for the second
probe is free:
Connect the second probe (Oxi or Cond) and immerse it in
the same sample. TP flashes, the temperature is automati-
cally measured using the second probe.
Tref20
Lin Cal
8
1
S
Sal O U
% mg/l
mV/pH
1/cmSal
AutoCal DIN Tref25
nLF AutoCal TEC RCL
Auto Store
LoBat ARng AR
Time Baud
Day.Month No.
Ident Year
mbar
TDS
cm M
° F
/ K %
S/ m cm
8 4 2
9 9 6
° C
TP
pH
Reproducibility Response time
Better than 0.02 > 30 seconds
1 Call up the pH measuring mode with <
▲> <▼>.
2 Activate the AutoRead function with <AR>.
The current measured value is frozen (hold function).