Omega Products PHH-3X-KIT Installation Manual

LITMUSTIK®III
PHH-3X/PHH-3X-KIT
Pocket pH Tester

The PHH-3X pocket-size pH tester combines pH electrode, temperature sensor and
readout into a single, compact unit. The electrode module contains a signal amplifier
and a temperature sensor to let you take temperature-compensated readings. The
electrode module is easily replaced, thus extending the life of this handy pocket tester.
The electrode module detaches for easy replacement or battery removal.

The unit can be immersed up to 4" without damage. The PHH-3X has two-point
calibration for both temperature and pH scales.

BEFORE FIRST USE

You must condition the unit before its first use. To do this, remove the protective cap
and immerse the electrode in tap water for 30 minutes to hydrate the electrode and
dissolve any crystals formed.

CAUTION: Never immerse the tester above the yellow plug-in electrode.

After conditioning the electrode, perform pH calibration (see the pH Calibration
Section). Temperature is factory-calibrated; therefore, temperature calibration should
not be necessary.

ON/OFF Switch

Screw Adjustment

pH/Temp Selection

Protective Cap

MADE IN

USA

PH CALIBRATION

pH calibration is required to maintain instrument accuracy. Calibration should
be performed on a regular basis; however, frequency of calibration is application
dependent.

1. Turn on power switch at the right side of the unit and set the range switch
to the pH position. Remove end cap and place tester in a container of pH

7.0 buffer solution. Stir gently and wait a few seconds.

2. After the reading has stabilized, adjust (S) trimmer with a small screwdriver
to a reading of 7.0.

3. Rinse the electrode with distilled or deonized water. Shake the unit with a
gentle snap motion to remove excess water from the probe.

4. Place the tester in a container of pH 4 or 10 buffer solution and adjust (Z)
trimmer for a reading of 4.0 or 10.0.

5. Rinse the electrode with distilled or deonized water. Shake the unit with a
gentle snap motion to remove excess water from the probe.

6. Repeat above steps as required.

TEMPERATURE CALIBRATION

1. Remove the end cap and place tester in a container of ice water. Allow 8
minutes for the reading to completely stabilize. Gently stir the ice water.

2. Set range switch to degrees F and adjust (Z) trimmer for a reading of 32.

3. Place the tester in a container of water at a known higher temperature
within the meter’s specified range. Allow a minimum of 8 minutes for the
reading to completely stabilize. Adjust (S) trimmer for a reading of the
known temperature on the display.

4. Repeat above steps as required.

OPERATING PROCEDURE

After calibration, sample measurements can be performed.

1. Dip tester in solution up to 1 inch level. Under no circumstances

immerse above the top of the yellow electrode.

2. Stir gently and wait a few seconds.

3. When not in use, switch off the tester. To ensure optimum operation,
electrode should be kept moist. If the soaker pad in bottom of protective
cap is dry, pour pH 4.0 or 7.0 buffer solution into the cap to remoisten pad.
Should the pad be missing, simply add pH 4.0 or 7.0 buffer to the cap and
replace.

MAINTENANCE IS EASY!

Rinsing the electrode with distilled or deionized water between samples and
after use will prevent cross contamination and help extend useful life. When
using aggressive solutions, or solutions with heavy metals or proteins, take
readings quickly and rinse electrode immediately afterwards with deionized
water to remove any residue. This helps eliminate any possible contamination
of the electrode.