User Guide

then S1>S2, S2–D2>LA, HA>S1+D1;

If M1 = 4 and M2 = 3

then S2>S1, S1–D1>LA, HA>S2+D2;

where the minimum deviation (D1 or D2) is 0.5 pH (for

pH 500) or 25 mV (for mV 600).

Note The password cannot be viewed when SETUP is pressed

without entering the original password first. The default

password is set at “0000”. In the event that the user forgets

the password, this can be reset to “0000” by pressing and

holding CFM and then pressing LCD and CAL DATA at the

same time when the pH controller is in normal operating

mode (idle or control with measurement displaying).

Note When a wrong setup value is con-

firmed, the pH controller does not

skip to the next setup item but remains

in the current item displaying a flash-

ing “WRONG” indicator until the pa-

rameter value is changed by the user (the same is also true

for the setup code selection). In some circumstances, user

cannot succeed in setting a parameter to a desired value if

the related parameters are not changed beforehand; e.g. to

set a pH high setpoint to 10.00 the high alarm must be set to

a value greater than pH 10.00 first.

Note For code numbers 40, 41, 42, the output is related to pH or

mV units depending on the model (pH process meters or mV

process meters).