Sper-scientific 850055 pH Meter - Advanced Manuel d'utilisateur télécharger pdf (Page 13)

SETUP MODE

6. Press MN/MX/AV to enter P3.5 and view the offset val-

ue. The offset value is the mV value of pH 7 and the

default offset value is 0.0. The offset value will be

different after calibration. If the value is outside the

range of ± 60 mV, replace the probe.

P4.0 pH Calibration Buffer

This meter allows the selection of two different types of pH

buffers: NIST or CUSTOM. Selection of the proper buffer

type more accurately calibrates the probe to specific

requirements.

NIST buffer: (five settings)

pH 1.68, 4.01, 6.86, 9.18, 12.45

CUSTOM buffer: (five ranges)

pH 1.00-3.00, 3.50-5.50, 6.00-8.00, 8.50-10.50,

11.50-13.50

Select Buffer

1. Press SET for 2 seconds to enter setup.

2. Press ▲ to select pH buffer. “BUF” will appear on the

middle of the LCD and P4.0 will appear on the lower

portion.

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Sper-scientific 850055 pH Meter - Advanced Manuel d'utilisateur Page 13