Sper-scientific 850037 Large Display Conductivity Pen Manuel d'utilisateur télécharger pdf (Page 31)

Selecting the Measurement Range (rAn)

There are two measurement ranges.

The pen defaults to auto-ranging

Conductivity

Range 1

0 ~ 1999 uS

Range 2

0 ~ 19.99 mS

To manually select the measurement range:

1. Press SET to turn the pen on.

2. Press ▲ for more than 2 seconds to

select range 1. Press ▲for more than

2 seconds to select range 2.

2.Press " " or " " more than 2

seconds to select the range.

CALIBRATION MODE (CAL)

To manual select the measurement

range:

1. Turn on the meter and stay at normal

measurement mode.

(Default)

Press" "

> 2 second

Press" "

> 2 second

PREPARATION FOR CALIBRATION

Two issues need to be prepared and

considered before operation. First,

what is the right calibration standard?

Second, when should you calibrate?

Selecting a calibration standard

For best results, select a conductivity

or TDS (8361) or NaCl (8371) standard

near the sample value you are measuring.

Alternatively, use a calibration solution

value which is approximate 2/3 of the

full scale of the measurement range you

plan to use.

For example, in the 0 to 1999 uS range,

use 1413 uS solution for calibration.

DO NOT reuse the calibration solution.

Contaminants in the solution will affect

the calibration and the accuracy. Be

sure to use fresh solution each time.

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Sper-scientific 850037 Large Display Conductivity Pen Manuel d'utilisateur Page 31

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