Myron L 6Pfc and 4P User Manual

Page 13

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9

5. UP or DOWN Keys

While measuring in any parameter, the

or

keys activate

the Memory Store and Memory Recall functions.

While in CAL mode, the keys step or scroll the displayed value up or

down. A single press steps the display and holding either key scrolls the

value rapidly.
While in Memory Recall, the keys scroll the display up and down through

the stack of records (ref. Memory Recall, pg. 21).

IV.

AFTER USING ThE ULTRAMETER II

A. Maintenance of the Conductivity Cell

Rinse out the cell cup with clean water. Do not scrub the cell. For oily

films, squirt in a foaming non-abrasive cleaner and rinse (ref. Cleaning

Sensors, pg. 32). Even if a very active chemical discolors the electrodes,

this does not affect the accuracy; leave it alone.

B. Maintenance of the pH/ORP Sensor (6Pfc)

The sensor well must be kept wet with a saline solution. Before replacing

the rubber cap, rinse and fill the sensor well with Myron L pH Sensor

Storage Solution. If unavailable, use an almost saturated KCl solution,

pH 4 buffer or a saturated solution of table salt and tap water (ref.

pH and ORP Practices to Maintain Calibration, pg. 21). NEVER USE

DISTILLED WaTER.

V.

SPECIFIC RECOMMENDED MEASURING PROCEDURES

If the proper solution is not selected (KCl, NaCl, 442 or User), see

Solution Selection, pg. 12.
NOTE: After sampling high concentration solutions or temperature

extremes, more rinsing may be required. When sampling low conductivity

solutions, be sure the pH cap is well seated so that no solution washes

into the conductivity cell from around the pH cap.

A. Measuring Conductivity & Total Dissolved Solids (TDS)

1.

Rinse cell cup 3 times with sample to be measured. (This conditions

the temperature compensation network and prepares the cell.)

2.

Refill cell cup with sample.

3.

Press

or

.

4.

Take reading. A display of [- - - -] indicates an overrange condition.

B. Measuring Resistivity

Resistivity is for low conductivity solutions. In a cell cup the value may

drift from trace contaminants or absorption from atmospheric gasses, so

measuring a flowing sample is recommended.

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