4220 Flow Meter
Section 3 Installation
WARNING
The 4220 Flow Meter has not been approved for use in “hazardous locations” as such locations are defined by the National Electrical Code.
Before any flow meter is installed, the proper safety precautions must be taken. The discussions of safety procedures are only general guidelines. Each situation in which you install a flow meter varies. You must take into account the individual circum- stances you are in. Additional safety considerations, other than those discussed, may be required.
3.7Isco Sampler Interface One of the uses of the 4220 Flow Meter is to control a sampler in a flow-paced sampling mode. Flow-paced sampling means that the flow meter is programmed to signal the sampler to take a sample after a specific volume of flow has passed through the flow stream, rather than after a particular period of time. In this mode, the sampler and flow meter will be able to compensate for varying flow rates. The 4220 Flow Meter may be used with any of the Isco Wastewater Samplers listed in Section 1.
An optional 25 foot (7.6 m) long connect cable is available to connect the flow meter to the sampler. Attach the six-pin female connector on the cable to the Sampler connector on the side of the flow meter. (This is the second connector from the top.) Attach the connector on the other end of the cable to the Flow Meter socket on the sampler. The flow meter will then be connected to the sampler's power supply, and the sampler will be able to receive flow-proportional signals from the flow meter. Refer to the sampler manual for further details.
