Few things are as simple as they should be. Good news: the WaterFeature8 actually IS that simple!
The diagram below shows a basic, monitoring only, WaterFeature8 deployment.
There are three main components:
Incoming power system consisting of a Power Supply to convert incoming power to +24VDC and low voltage wiring to connect the power supply to the WaterFeature8.
WaterFeature8 water quality monitoring system. This can be either the WF8 System Builder Kit or the pre-assembled Sensor Interface System.
Water tank or reactor, submersible sensors, and Atlas Scientific, LLC EZO circuits.
Let's discuss each component in more detail.
1. Power Connection
Most Americans have single-phase 120 V alternating current (AC) at 60 Hz coming to our homes. The rest of the world operates on some variation of voltage ranging from 110 V to 240 V and frequency of either 50 Hz or 60 Hz. It is important to know which power is being supplied to your site. If the system is being integrated into an existing control panel, check to see what power is readily available.
The WaterFeature8 requires 12 V to 24 V direct current (DC) power, and to ensure WF8 analog output reliability the input power should be nominally 24 VDC. A Power Supply converts one type of incoming power to another type of outgoing power. In most cases in the U.S. you will be converting 120 VAC to 24 VDC. They can be purchased online at any number of electronics stores.
2. WaterFeature8 System Builder Kit
The System Builder Kit includes the circuit board, 4x40 character LCD screen with ribbon cable, four pushbuttons with wiring harness, and various #4-40 screws and standoffs.
The system can be mounted however you like as long as it is properly grounded to the DC power supply and does not short-to-ground against anything nearby.
Check in at the ITS Downloads page for dimensional data and 3D model downloads.
Also visit the ITS Store to purchase our Panel Integration Kit which includes a mounting panel, pushbutton bracket, DIN rail bracket, and associated hardware.
3. Sensors and EZO Circuits
Most installations will be at or near some sort of water holding tank, reactor, tub, pool, vat, or as my kids like to say, cauldron.
The WaterFeature8 System is designed to be compatible with many different kinds of sensors. Although we cannot confirm EVERY sensor that works with it, we can say it is compatible with MOST Atlas-Scientific, LLC sensors. Buy your hardware from them and know that it works.
The Atlas Scientific, LLC EZO circuit family is an inexpensive, highly accurate, and richly featured configure-to-suit family of water quality devices. Buy any combination of EZO circuits and install them on the WaterFeature8 in any order. Note, there are a few specific details that are important regarding electroconductivity and flow, so we recommend visiting our downloads page and reviewing the most resent product documentation.
Put It All Together
This is arguably the easiest part, but takes the most amount of time.
Step 1: Build the monitoring system:
Step 1A: Arrange your devices on a flat surface and mark your mounting holes. Drill holes to match the mounting hardware that comes with your equipment. Fasten the power supply, WaterFeature8, LCD screen, and pushbuttons in convenient locations.
Step 1B: Wire system power to the Power Supply. Follow your local building codes for these higher voltage supply wires.
Step 1C: Connect low voltage wires from the power supply to the WaterFeature8. We use 20 Ga stranded wire for this, but you can really use any low voltage insulated wire.
Step 1D: Secure LCD ribbon cable and pushbutton wiring harness onto the correct sockets on the WaterFeature8 board. They are designed with an alignment key and will only insert one way.
Step 1E: Set EZO circuits onto the WF8 sockets, noting the alignment of VCC and GND pins to ensure proper insertion.
Step 2: Install sensors:
Step 2A: Mount the sensors in the tank in their correct locations.
Step 2B: Connect the sensors. The WaterFeature8 System Builder Kit will not use the factory BNC ends that the sensors are provided with. Snip the end of the BNC and separate the wire ends and secure the correct [VCC], [PRB], and [PGND] wires to the board. [VCC] is the 3.3 or 5 VDC power to the sensor, [PRB] the probe signal wire, and [PGND] is the probe ground. pH, DO, ORP, EC, and RTD sensors exclusively use this wiring convention, however, flow meter wiring is slightly more complicated. We recommend reading up on our flow meter wiring guide.
Step 2C: If the sensor needs to be farther away from the system than the length of the sensor wire, connect the sensor wire ends to a run of 50 ohm coaxial cable. We regularly use RG-58 A/U stranded/shielded coaxial cable.
Step 3: Turn on the Power Supply and the WaterFeature8:
Step 3A, Power Supply: Most power supplies will have a toggle switch to actuate output voltage. Make sure the power supply is wired to the WaterFeature8 before activating the switch.
Step 3B, WaterFeature8: Toggle the power supply switch on the WaterFeature8. The system is shipped from the factory set to RUN mode. If the LCD does not illuminate, check to see that the PGM/RUN switch is set to "RUN."
Step 3C: If the EZO circuits are in factory default settings, hold button #2 when powering on the WaterFeature8. This will start the AutoConfigure function on the system and it will automatically program all populated EZO circuits to be compatible with the WF8. If the EZO circuits are not in factory default settings, refer to our programming instructions on the Downloads page.
Step 4: Perform sensor calibration and temperature compensation assignments as needed. The WaterFeature8 is designed to be very simple to operate, but we still recommend you review the instruction manual included with your system. A copy is also downloadable on our Downloads page.
Step 5: Your system is ready to go. We hope you like it and we would love to hear how you deployed your system and what you are doing with it!
What can you do with 8?