AquaMetrix Aqua-Check, Operator'S Manual

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Chapter 1 1
Introduction
Chapter 1
Introduction
The Aqua-Check Water Analyzer is a compact, rechargeable, battery-operated,
field instrument that simultaneously measures the dissolved oxygen level, pH,
conductivity, and temperature of water and aqueous solutions.
The operator can elect to display either uncompensated values or values that have
been compensated for external effects. In the compensated mode, the conductivity
and pH values will be compensated for temperature and the dissolved oxygen
reading for temperature, salinity, and atmospheric pressure.
All of these parameters, except atmospheric pressure, are measured with a single
compact probe that is equipped with a specific cable length (10', 25', 50', 100', 150',
and 200' are the standard lengths). This allows remote measurements to be taken,
without the need to draw a sample.
The Water Analyzer also contains a built-in measurement log to manually store
readings. This allows up to 199 sets of measurements to be saved in the field for
later review.
Power
The battery in the Water Analyzer will provide about 8 hours of continuous
operation (6 hours when using the RS-232 or barometer options). A low battery
signal will appear when approximately one hour of use is left. The meter has an
auto-shutoff safety feature that disconnects the power before the battery voltage
drops below a level dangerous to the memory. Recharge time for the battery is 5.5
hours. The Water Analyzer contains a back-up battery and will retain the stored
calibration information and the measurement log for at least 30 days without
external power.
An AC adapter/charger is provided for charging the Water Analyzer. An optional
12 V automobile cigarette lighter adapter is available. Extreme temperature during
recharging is not recommended. It is also recommended that the vehicle not be
started while the Water Analyzer is plugged in.
The Water Analyzer uses a sealed lead-acid gelled electrolyte battery. Unlike a
NiCad battery, these batteries can be recharged before they have been fully dis-
charged. Incomplete charge and discharge cycles will have little effect on battery
life or capacity. The battery is also protected from overcharge by an internal
battery maintenance circuit that allows the unit to be left connected to the AC
adapter/charger whether the meter is in use or not. The battery requires recharging
at least once every 3–4 months during extended periods of nonuse.