Xylem Oxi 1970i PORTABLE DISSOLVED OXYGEN METERS Manual de usuario descargar pdf (Pagina 19)

Oxi 1970i Operation

ba75691e01 01/2007

4.2.5 AutoRead AR (drift control) and hold function

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. With the aid of the hold function the

measured value display is frozen.

Criteria With identical measurement conditions, the following criteria are valid

for the AutoRead function:

Use the AutoRead function and hold function like this with the sensors

z Oxygen depth armature

z CellOx 325

z DurOx 325

Note

The special features of the self-stirring D. O. sensor StirrOx G can be

found in section 4.2.6 on page 20.

Measuring mode Reproducibility Response time

D. O. concentra-

tion

better than 0.05 mg/l > 10 seconds

D. O. saturation

index

better than 0.6 % > 10 seconds

1 Select the measuring mode with <M>.

2 Activate the AutoRead function with <AR>. The current mea-

sured value is frozen (hold function).

3 Start AutoRead with <RUN/ENTER>.

AR flashes until a stable measured value is reached.

4 If necessary, start the next AutoRead measurement with

<RUN/ENTER>.

REL1

Sal

LoBat nLF

Lin

Oxi

Tref25 Tref20

Cal

TEC

Auto

Store

Time

Year

Ident

No.

Day.Month

Baud

Sal

RCL

REL2

pH/mV

1 7 6

ARng

mg/l

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 64 65

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