Myron L 6P and 4P User Manual

Page 18

VII. CALIBRATION

A. Calibration Intervals

Generally, calibration is recommended about once per month with

Conductivity or TDS solutions. Calibration with pH solutions should

be checked twice a month. Calibration of ORP is not necessary (ref.

CALIBRATION INTERVALS, pg. 19).

B. Rules for Calibration of the Ultrameter II

1. Calibration Steps

a. Starting Calibration

Calibration is begun by pressing

while measuring Conductivity,

TDS or pH. Measuring continues, but the CAL icon is on, indicating

calibration is now changeable.

The reading is changed with the

and

keys to match the

known value. The calibration for each of the 4 solution types may be

performed in either conductivity or TDS mode.

Depending on what is being calibrated, there may be 1, 2 or 3 steps to

the calibration procedures.

Once in “CAL” mode, the

key becomes an “ACCEPT” key. At

each point, pressing

accepts the new calibration value and steps

you to the next adjustment (or out of CAL mode if there are no more

steps).

To bypass a calibration step, simply press

to accept the present

value as is.

b. Leaving Calibration

Calibration is complete when the “CAL” icon goes out. Pressing any

KCl, NaCl or 442

User

Cond Gain only

Tempco, then Gain

Res

Done in conductivity

Done in conductivity or TDS

TDS Gain only

Tempco, Ratio, then Gain

7, acid and/or base (6P)

ORP Zero set with pH 7 automatically (6P)