LABEC M-PL-600 - Manual (Page 18)

Appendix 1 Checking method of pH linear error
Input 177.48mV(pH4.00 buffer solution electrode potential simulate
value)、-178.07mV(pH10.01 buffer solution electrode potential simulate
value) into the instrument，temperature compensation sent to 25℃，
operate according to 2 points calibration；after calibration the instrument
displays “
”signal.(if type 640 please set the buffer solution set to
b1)Check the linear error of the instrument according to following table.
mV 414.11 354.95 295.80 236.64 177.48 118.32 59.16 0
pH 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00
mV -414.11 -354.95 -295.80 -236.64 -177.48 -118.32 -59.16
pH
8.00 9.00 10.00 11.00 12.00 13.00 14.00
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