YSI pHotoFlex pH Handheld Colorimeter - Manual (Page 41)

pHotoFlex
®
pH Operation
41 ba76123e01 02/2013
4.5.5 Standard adjustment (user calibration)
With some of the programs (methods) for concentration measurement,
you can optimize the calibration curve stored in the meter with the aid
of the Standard adjustment function.
A standard adjustment is only valid if the deviation compared to the
original calibration is no more than 30%.
A standard adjustment is always stored for the program that is pres-
ently called up. A standard adjustment is only deleted if
 a new standard adjustment is carried out
 the standard adjustment is erased manually
 the meter is reset to delivery status (Reset function)
Standard adjustment
The following measurement of the standard applies only to the selected
program.
If data of a standard adjustment are already available, the data of the
last standard adjustment are displayed. Here you can also erase the
data of an active standard adjustment.
1 If necessary, press the <M> key several times until the mea-
sured parameter Concentration is selected.
2 Select a program with <PROG> as necessary.
3 Using <CAL/ZERO>, open the Photometry \ Adjustment menu.
4 Open the Standard adjustment menu with <> <> and
<START/ENTER>.
5 Using <> <> and <START/ENTER>, select and start the
Measure standard function.
The menu-guided standard measurement begins.
Follow the instructions on the display.
Zero adjust.
Measure blank value
Delete blank value
Standard adjustment
Photometry \ Adjustment