4230 Flow Meter
Section 3 Installation
3-2
CAUTION
Do not operate the 4230 with a saturated desiccator cartridge.
Moisture eventually will seep inside the unit causing unseen
damage.
Operation in low temperature-high humidity environments is
particularly risky. Moisture drawn into the pump will form ice,
jamming the pump and ruining it.
Do not operate the flow meter with the door left open. Moisture
will quickly saturate the desiccator. Dust may settle inside and
damage the printer.
For maximum equipment life, inspect the desiccants regularly
and regenerate them when necessary. Keep the lid closed and
latched unless you are programming or servicing the flow
meter.
3.1.3 Opening the Case To access the flow meter keypad and internal printer, you must
open the case. Do this by unlatching the two catches on the right
side of the flow meter cabinet (as you face it) and opening the lid.
Keep the flow meter lid closed and latched whenever possible.
This will protect the internal components from dirt and moisture,
and will prolong the life of the desiccator. A case left open will
defeat the purpose of the seal by causing the desiccant canister to
quickly saturate with moisture.
Dust will also settle inside the case, wearing the moving parts of
the printer prematurely. Many flow meters are installed in damp
environments. Moisture and fumes dispersed inside the case can
form acids that will corrode the electronics.
3.2 Connection to a Power
Source
The 4230 requires a 12 volt, direct current (12 VDC) power input.
This power may come from various sources.
• Companion Isco Automatic Wastewater Sampler
• Isco AC Power Supply
• Isco Battery (lead-acid or nickel-cadmium) attached to
the flow meter
• External 12 VDC battery, such as a deep-cycle marine,
or RV type
3.2.1 Low Power Indication When power to the flow meter falls too low for normal operation,
the message POWER LOST/LOW BATTERY will appear on the
display. When power is lost or falls below operating limits, the
flow meter will stop accumulating data (if you are using
FLOWLINK), and the printer will not print, but the
battery-backed RAM will save stored data (if any) and the
program selections for the flow monitoring program you have
entered into memory.
3.2.2 Isco Sampler If you are using the 4230 Flow Meter with an Isco Sampler in a
flow-paced sampling system, you can power the flow meter from
the sampler's battery or power supply. Connect the flow meter to
the sampler with the 6-pin flow meter-to-sampler cable. Use the
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