User Guide

If M1 = 3 and M2 = 2

then S1>S2+H2, S2>LA, HA>S1+D1;

If M1 = 2 and M2 = 3

then S1+H1<S2, S1>LA, HA>S2+D2;

If M1 = 4 and M2 = 1

then S1<S2–H2, S1–D1>LA, HA>S2;

If M1 = 1 and M2 = 4

then S1–H1>S2, S2–D2>LA, HA>S1;

If M1 = 3 and M2 = 4

then S1>S2, S2–D2>LA, HA>S1+D1;

If M1 = 4 and M2 = 3

then S2>S1, S1–D1>LA, HA>S2+D2;

For pH5025YZ and mV6025YZ only:

If M1 = 1 then S1+D1<HA;

If M1 = 2 then S1–D1>LA;

where the minimum deviation (D1 or D2) is 0.5 pH (for pH502)

or 25 mV (for mV602).

Note The password cannot be viewed when SETUP is pressed with-

out entering the original password first. The default password

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

word, 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 flashing

“WRONG” indicator until the param-

eter value is changed by the user (the

same is also true for the setup code selection). In some cir-

cumstances, the 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).

Items 41 and 42 are not available in pH5025YZ and mV6025YZ.