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will display ION , anniciator 1 ( on the higher left
cornor / model 6250) or red color STAND I LED (model 6219)
lamp will flash and the conc. unit indicator will on. 1.5 Press the
STAND/STAND I key, the LCD will display 1.00, anniciator 1
(on the higher left conor / model 6250) or STAND I LED
lamp (model 6219) will on and anniciator 2 (on the higher
left cornor/ model 6250) or red color STAND II LED (model
6219) lamp will flash. The instrument is single point standardized
and assumes a slope of +58 mV per decade change in
concentration.
Er5 will be displayed if the input value e/- 750mV
(approximately) or the display exceeds 120.0 conc.
Er2 will be display if the STAND II key is pressed before the
STAND I key.
1.6 For dual point standardization, remove the electrodes from the
dilute standard, rinse with the concentrate standard or de-
ionized water and immerse the electrodes in the concentrate
standard 2.
1.7 Press the STAND II key, the anniciator 2 (model 6250)
or STAND II LED (model 6219) lamp will on. The STAND II
key can be pressed as many times as required for a stable reading
of 10.00 conc. The instrument is dual point standardized and
ready for measurements. The electrodes should always be rinsed
with the sample or de-ionized water before measure-ments.
Er2 will be displayed if electrode slope small than 50% of
ideal slope, 58 mV.
Er5 will be displayed if the input value e/- 750 mV
(approximately) or the display exceeds 120.0 conc.
