Hanna Instruments PCA 300 Series - Manual (Page 35)

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2.A.4 Press DIAG; “rc 4” will be displayed and the analyzer
will execute this mode calibrating the output to 4 mA.
2.B To automatically calibrate "20 mA"
2.B.1 Press DIAG. The display will show the last diagnostic
mode and the right-most numerical digit will blink.
2.B.2 Enter code 107 using the and keys.
2.B.3 Press DIAG; “rc20” will be displayed and the analyzer
will execute this mode calibrating the output to 20 mA.
2.B.4 Using the recorder output selector switches, turn the
Calibrate Current switch off (#5) and then turn the 4-
20mA on (#4).
DIAG
DIAG
DIAG