Accessories
37
Cat. No. 01023095
Flow Meters
There are two flow meters on the M2 RO system, the feed flow meter (FM1) and the product flow meter (FM2).
Connect the wires of both flow meters to the GBE board using the 4 - pin connections provided. The feed flow meter con-
nects to FM1 (J11) and the product flow meter connects to FM2 (J12). See Figure 15.
The pins are:
Pin 4 = not connected
Pin 3 = ground
Pin 2 = flow pulse signal
Pin 1 = 5 VDC power supply
NOTE Pin 1 on the GBE board is identified with a small WHITE dot.
J15—INLET
FLOW METER
FLOW METER
J1—PRODUCT
J10
J16
J17
The 4 - Pin Connections are:
4 = n/c, 3 = ground, 2 = flow pulse signal, 1 = 5 VDC supply
NOTE: Pin 1 is identified with a small WHITE dot.
4 3
2
1
4 3
2
1
Figure 15.
Flow Meter Connections on GBE Board
1. Start with both the recirc valve and the waste valves fully open (turn the valve all the way in a counter-clockwise
direction).
2. Start the RO.
3. When the pump turns on, slowly close the waste and recirc valves clockwise.
4. Try to close the waste valve until the flow rates to product and to drain are approximately even, then begin to
close the recirc valve, to bring the membrane feed pressure within the range of 80–120 psi.
5. Set the K-Factor for both FM1 and FM2 at the values listed in Table 2. See
.
6. On the GBE RO controller, select 3)INFORMATION and observe the FFLOW and PFLOW rates.
7. Using a stopwatch and a bucket, measure and record the time elapsed (in seconds) to fill a one-gallon bucket
with product water.
8. Meaure and record the time elapsed (in seconds) to fill a one-gallon bucket with waste water.
NOTE Convert your stopwatch readings to minutes (for gallons per minute) by dividing the number of sec-
onds by 60. For example, if you measure 45 seconds to fill a 1-gallon bucket, the fill time is 45/60 = 0.75
minutes, and the flow rate is 1/0.75 = 1.33 gpm.
