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    Rola-Chem Digital ORP/pH Controller

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    This world class ORP/pH Digital Controller is manufactured with quality and precision to ensure durability and accuracy.

    INCLUDES:
    • Controller
    • Flow cell with flow switch
    • probes
    • 1/4 in. tubing and fittings
    DIGITAL ORP/pH CONTROLLER FEATURES:
    • Digital readouts
    • Built-in out of range safety time outs
    • ORP technology
    • pH calibration
    • Redox sensor
    • Acid or base feed
    • Proportional feed
    • Microprocessor logic
    • Dip switch programmable settings
    • Machined acrylic flow cell with flow switch
    • Flow switch included
    • Compatible with most peristaltic pumps
    • Can also be used with erosion feeder/solenoid applications
    • Lockout security feature
    • NSF50 Approved
      • Item: # E6702 Rola-Chem Digital ORP/PH Controller $1,468.99
      • Item: # E6252 Rola-Chem pH Probe $188.99
      • Item: # E6254 Rola-Chem ORP Probe $188.99
      • Customer Review
      • Product Specification
      • TROUBLESHOOTING
      • MORE INFO
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      • Display Range: 6.8 - 8.2 0 - 995 mV
      • Setpoint Range: 7.0 - 8.0 400 - 900 mV
      • Factory Setting: 7.4 650 mV
      • Power: 120V corded or 240V permanent wire
      • Feed: Automatic or manual
      • Warranty: One year limited warranty on electronics
      • Probes: One year limited warranty
      • Maximum Amps: 5 Amps

      - If light bars are on top or bottom position, the water pH is 7.4-7.6(see caution on pg. 14 in manual) and the chlorine is 1-3ppm, check the probes. 

      - If water is not in the range correct the water condition and re-check the light bar positions.

      - Check pH probe in a 7.2 buffer solution and view the light bars, if 2nd, 3rd, or 4th light bar from the bottom is illuminated the probe is good.7.2 pH buffer solutions is available from test kit manufacturers or Rola-Chem. Prepare a mixture of 1 pint (16 oz) 7.4-7.6 pH bottled water plus 1 drop of 5.25% bleach (house hold bleach).

      - Check with test kit for 1-2 ppm free chlorine. Add one drop of chlorine at a time to adjust test mixture as required. Put ORP probe in mixture. If any 3rd through 7th light bar is illuminated the probe is good.

      Note: It may take five minutes for probes to respond to solutions. If it takes longer, clean or replace probes.

      - Probes can be cleaned by washing with dish washing liquid and a Q-tip or cotton cloth and then soaking for 3 minutes in solution of muriatic acid diluted 20:1, followed by rinse with bottled water.

      - If test kit readings of ORP of pH do not compare with the approximate Light Bar reading on controller it may be because the water flow rate is high through the manifold. If this is the problem it can be remedied by readjusting the flow through the manifold.

      - Verify that the probe ends are in the flow stream of the manifold.

      - If control shuts down with no light bars lit and one or both set point lights flashing indicates that there is no water flow or inadequate flow through the clear manifold. (If flow appears adequate but lights are in this described mode, the switch may need re-adjustment contact manufacture.)

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