||PINPOINT¨ Salinity Monitor
American Marine is proud to introduce PINPOINT¨ Salinity Monitor,
the only truly accurate and affordable Salinity measurement system. A
9-volt battery should be used for intermittent or field use while a PINPOINT¨ AC Adapter Kit can also be installed. Battery replacement is visually indicated on the display as "LOBAT."
NOTE: The Salinity Monitor unit is
NOT waterproof and must be operated on a dry surface. Liquid contact on
the printed circuit board will cause corrosion and void warranty.
Unwrap the protective plastic packaging from the Salinity
Monitor Unit. Remove the battery cover on the back of the monitor and
install a 9-volt battery or the PINPOINT¨ AC Adapter Kit. Activate the
unit by setting the power switch to the ON position. Use the pop-up
stand on back and place meter on any flat, dry surface. Velcro can be
used to mount the meter onto a vertical surface.
Your PINPOINT¨ Salinity Monitor is now ready for calibration.
Note: The meter should be
calibrated immediately before use. The calibration should be checked
occasionally to verify your readings. The precise measurement of Salt by
electronic conductive means has long been considered to be the most
accurate method, especially when compared to Specific Gravity / Density
(hydrometers) and refractometers.
Marine environments should use the calibration fluid labeled
53.0mS. Empty the 53.0mS into a small, clean cup and swirl the probe in
the fluid making sure that no air bubbles have accumulated under the
probe. Wait 1Ð2 minutes to allow for the temperature thermistor inside
the probe tip to properly compensate for any temperature differences
between the fluid and the probe. Using a miniature screwdriver, turn
screw #3 (see diagram) until the display matches the 53.0mS fluid
(±0.5). The calibration adjustment screw #3 is located inside the
battery compartment most toward the center of the meter. Note that the
conversion chart will convert the display readings to either ppt (ä
Salt) and/or SG (Specific Gravity). Click here for an expanded range PINPOINT¨ Salinity chart.
Koi and Freshwater Systems benefit greatly from a small but
precise level of added salt. Typically, a 0.3% level is considered
optimum. These low levels can only be accurately measured with a PINPOINT¨ Salinity Monitor. Hydrometers and refractometers are generally impossible to use at these low salt levels. The PINPOINT¨ Salinity Monitor
should first be calibrated with a 0.3% salt fluid. Prepare this fluid
by mixing 11.4 grams of pure uniodized table salt (Kosher Salt) with
3,785mL (1 gallon) of distilled or deionized water. Perhaps your
neighborood pharmacist can help measure the 11.4 grams of salt. Submerge
the probe into this 0.3% calibration fluid and calibrate the PINPOINT¨ Salinity Monitor to display 5.5mS by adjusting screw #3. Your PINPOINT¨ Salinity Monitor
is now calibrated to read the low salt levels of a Koi pond, etc. It is
important to take into account the existing salt level in a pond before
adding any additional salt.
Salinity is a complex subject and one must be sure of the target
specific gravity or ppt Salt has been properly selected in advance. The PINPOINT¨ Salinity Monitor is automatically temperature compensated therefore the displayed values are already compensated and corrected.
NOTE: Do not adjust screw #4 since
this is used to set frequency and requires specialized equipment for
adjustment. Screw #4 has been set at the factory and does not require
further adjustment. A small amount of glue has been placed on screw #4
to prevent accidental adjustment.
Important Points to Remember
- The PINPOINT¨ Salinity Meter
is NOT waterproof and must be operated on a dry surface. Any liquid
contact on the printed circuit board will cause corrosion and void
- It is important to "swirl" the probe so as to eliminate
any air bubbles that may accumulate under the probe before taking a
- The probe is epoxy sealed and can be totally submerged.
- The electrode should be cleaned every few months with a
mild solution of water (16 oz.) and dishwashing detergent (1/2
teaspoon). Rinse the electrode well with fresh water.
- The PINPOINT¨ Salinity Monitor is automatically compensated throughout the temperature range 32¼F to 122¼F (0¼ to 50¼C).
- Calibrate the monitor with the appropriate fluid before use.
- Check the calibration occasionally. Calibration fluid can
be re-used if uncontaminated by other fluids and kept in a tightly
Reference Chart Sources:
- Zerbe and Taylor (1953)
- Cox R.A., The Physical Properties of Seawater, Chemical
Oceanography, Vol. 1, Riley, J.P. and Skirrow, G. Eds., Academic Press,
PINPOINT¨ Salinity Monitor by
American Marine Inc. is warranted to be free of defects in material and
workmanship for a period of 2 years from date of sale. Positive proof
of purchase is required for warranty claim.
Removal or alteration of the serial number will void warranty.
American Marine Inc. will not be liable for any costs of removal,
installation, transportation charges, or any other charges, which may
result in connection with a warranty claim.
American Marine Inc. will not be liable for any damage or wear to
products or livestock caused by abnormal operating conditions, water
damage, abuse, misuse, unauthorized alternation or repair or if the
product was not installed in accordance with the printed operating
Any defective product to be returned must be sent freight prepaid
with appropriate documentation supporting the warranty claim.
Replacement or repair will be at the discretion of American Marine Inc.
Typical turnaround time within 48 hours. Overnight delivery available.
American Marine Inc.
54 Danbury Road, Suite 172
Ridgefield, CT 06877 U.S.A.