| Should I leave my monitor on all the time?
PINPOINT® Monitors have been designed as continuous monitors. However, if you wish to activate the units ON and OFF as needed, this will lengthen the battery life from months to years.
I just unpacked my new monitor and found white crystals on the probe. Is this normal?
There may be some white salt (potassium chloride crystals) residue around the clear plastic cap. This is normal and can be washed off with water.
Why does the reading on my monitor never change?
The clear plastic cap must be removed from the tip of the probe so that the values can be measured.
What if my monitor should fall into the water?
PINPOINT® Meters are NOT waterproof and must be operated on a dry surface. Liquid contact with the printed circuit board may cause corrosion and void the warranty.
What is the correct placement of the probe?
Probe should be inserted about 1 inch into the liquid to be measured. Probe may be totally submerged if desired. If several probes are used (i.e., pH and ORP, several pH, etc.) space the probes 3-4 inches apart so that the probes will not react with each other and yield erroneous readings. The probe may be placed vertically or at an angle up to 45º. Do not allow air bubbles to accumulate under a vertically installed electrode.
What maintenance does my monitor need?
Clean the sensing glass and reference junctions of the probe every few weeks by using only a wet toothbrush. Check the calibration monthly to verify your pH readings. When calibrating the PINPOINT® II Oxygen Monitor, it is important that the probe be given a few minutes to polarize during the calibration procedure. This helps to stabilize the readings. The electrode of the PINPOINT® Conductivity and Salinity Monitors should be cleaned every few months with a very weak solution of water (16 oz.) and dishwashing detergent (1/2 teaspoon). Rinse the electrode well with fresh water. If you are using the PINPOINT® II Oxygen Monitor, the silver metal sleeve located on the probe tip under the membrane cap should be gently cleaned with steel wool every few months to prevent glazing.
Is there anything special I need to do before I store my monitor for a few months?
The sensing surface of the probe must be kept WET at all times. If the probe is to be transported or stored, the plastic cap must be filled with storage solution (4.00 calibration fluid + potassium chloride crystals) or 4.00 calibration fluid prior to being installed onto the probe.
Can I reuse my calibration fluids?
Calibration fluid can be re-used if uncontaminated by other fluids and kept in a tightly capped container.