Myron L 6Psi and 4P User Manual

Page 12

b. RES Key

A press of

displays resistivity with units on the right. On the left

is shown solution type selected for resistivity (ref. Solution Selection, pg.

11). The range of display of resistivity is limited to between 10 kilohms

(KΩ) and 30 megohms (MΩ). A solution outside that range will only show

[- - - -] in the display.

c. TDS Key

A press of

displays Total Dissolved Solids with units on the right.

This is a display of the concentration of material calculated from

compensated conductivity using the characteristics of a known material.

On the left is shown solution type selected for TDS (ref. Solution

Selection, pg. 11).

3. pH and ORP Keys (6Psi)

Measurements are made on solution held in the pH/ORP sensor well

(ref. pH and ORP, pg. 43). The protective cap is removed and the sensor

well is filled and rinsed with the sample enough times to completely

replace the storage solution.

After use, the pH/ORP sensor well must be refilled with Myron L Storage

Solution, and the protective cap reinstalled securely (ref. Maintenance

of the pH/ORP Sensor, pg. 9 and Cleaning Sensors, 2. pH/ORP, pg. 32).

a. pH Key (6Psi)

A press of

displays pH readings. No units are displayed on the

right.

b. ORP Key (6Psi)

A press of

displays Oxidation-Reduction Potential/REDOX

reading in millivolts; “mV” is displayed.

NOTE: See New ORP ppm Free Chlorine Feature, pg. 48, to change

units to ppm free chlorine.

4. CAL/MCLR Key

A press of

allows you to enter the calibration mode while

measuring conductivity, TDS or pH. Once in CAL mode, a press of this

key accepts the new value. If no more calibration options follow, the

instrument returns to measuring (ref. Leaving Calibration, pg. 14).

is held down for about 3 seconds, “CAL” mode is not entered,

but “SEL” appears to allow Solution Selection (ref. pg. 11) with the Up or

Down keys. As in calibration, the CAL key is now an “accept” key.

While reviewing stored records, the MCLR side of the key is active to

allow clearing records (ref. Clearing a Record/Memory Clear, pg. 21).