Amprobe WT-30 Manual del usuario - Página 10

Navegue en línea o descargue pdf Manual del usuario para Instrumentos de medida Amprobe WT-30. Amprobe WT-30 17 páginas. Salinity meter

P4.1: Range 1 calibration info:

In P4.0, press "SET" to enter P4.1 and review the

last calibration concentration. If the meter is not

yet calibrated, "---" will display on the LCD. The

calibration information will be override after

recalibration.

P4.2: Range 2 calibration info:

In P4.1, press "p" to enter P4.2 and review the

last calibration concentration. If range 2 is not yet

calibrated, "---" will display on LCD. In P4.1 or P4.2,

press "SET" to return to P4.0.

Calibration Mode (CAL)

Selecting a calibration standard

For best results, select a NaCL solution which is 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 10.1 to 70.0 ppt range, use 47 ppt

solution for calibration.

DO NOT reuse the calibration solution. Contaminants in

the solution will affect the calibration and the accuracy.

When to do the calibration?

Calibration is necessary and should be done regularly.

If measure the mid-ranges, calibrate the meter at least

once a month. Soak the probe for 15 mins before

calibration or measurement can saturate the probe

surface and minimize drift.

If measure the extreme temperatures or special

concentration (<0.1ppt or >5ppt), calibrate the meter at

least once a week to get specified accuracy.