3-1
4230 Flow Meter
Section 3 Installation
This section contains instructions for installing the 4230 Flow
Meter. There is also information on mounting methods, intercon-
nection wiring, and the setup procedure.
3.1 Preparation for Use Isco ships the flow meter with a roll of paper installed and a
default program entered into memory. You should familiarize
yourself with the programming procedure and practice working
through the program steps, so you become comfortable with pro-
gramming the unit. With the exception of setting the level, you
can program the unit in the shop, rather than on the job site, if
you want. This is a good idea as it will minimize the possibility of
dirt and contamination getting inside the flow meter.
3.1.1 Install Desiccant
Canister
If the unit is new, you can install the desiccant canister. It is pro-
vided in the accessory package and looks like a small, flat can
with little holes in it. Open the flow meter case lid. Note the
small clamp that resembles a bottle cap opener located near the
bottom right-hand corner of the case lid. Install the desiccant
canister by pressing it under this bracket, with its viewing
window lined up with the circular hole in the bracket. Make sure
the clamp is fully engaged over the canister. The particles inside
the desiccant window should be blue. If the particles are pink,
the desiccant is saturated and you will need to regenerate the
canister before using it. If the unit has been in use and has been
returned for reprogramming, you should clean it and inspect it as
outlined in Section 5 of this manual.
3.1.2 Install External
Desiccant Cartridge
The desiccant cartridge snaps into the large metal clamp
mounted on top of the cabinet. There is a short length of silicone
tubing that attaches to a plastic fitting on the side of the cabinet.
Attach the other end of the tubing to one end of the desiccant car-
tridge. Like the case desiccant canister, the material inside the
external desiccant cartridge should be colored a definite blue. If
they are violet or pink, you need to regenerate them. See Section
5. You will need to dump the particles out of the cartridges into a
small heat-proof pan for regeneration; you cannot regenerate
them inside the cartridge. The cartridge is plastic and will melt.
Venting the Desiccant Cartridge – If you suspend the flow
meter over the flow stream and there is any possibility of acci-
dental submersion, vinyl tubing, available from Isco, should be
attached to the vent on the end of the external desiccant car-
tridge and routed to a place higher than the maximum possible
level of the flow stream. This will prevent any water from
entering the flow meter or the vent tube for the bubbler in case of
accidental submersion.
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