Chapter 3 Functions
3.4 Setting modes
F-51
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3.4.2 pH standard solution setting
The meter allows you to select the standard solution specifications used
for calibration from among the NIST standard, US standard (USA), and
user-defined standard (CUST).
Types of pH standard solutions" page 90 .
The calibrated value for pH 7 standard solution is different between the NIST
standards and US standards.
NIST standard: pH 6.86 (at 25°C)
US standard: pH 7.00 (at 25°C)
Maintenance
Sets various maintenance-related
settings.
Display
Name
Description
Page No.
NIST standard
When using the standard solution
required by NIST standards
Bottle mark
US standard
(USA)
When using the standard solution
required by US standards
Bottle mark
Custom (CUST) When using a user-defined standard
solution
Bottle mark
