Your readings should come up assuming your anodes are making good contact to the hull.
What is your reading without the Mag Guppy? Is it Mag. or is it zink. Mag. will increase readings quickly and can over protect if your anodes are in good shape.
Also readings for your CAPAC are based on a salt water environment. Reading will tend to be lower in clear fresh and cold water. As the water temp and turbidity increase the readings will also rise again based on continuity of the anodes.
Example. My 29 readings in Cumberland River. with new anodes .95-1.02.. After three full seasons and winters in the water the numbers dropped to .78 (loss of continuty) Hung a MAG Guppy over side and readings were back to .98.
You also should check and calibrate your CAPAC. Connect the wires to a digital voltmeter and compare to the your CAPAC. There is a calibration screw on the front of the meter. Calibrate the CAPAC with your multimeter reading. You will probably find your CAPAC reads low! You will note that follow the wiring exactly to your multimeter. The readings are actually NEGATIVE voltage. so a reading often referred to as .95 volts is actually -.95 volts.
Also check your isolation on shafts etc. If you ground the shaft the voltage on the CAPAC will deflict downward if isolated. If it does NOT deflect then your shaft or fitting is GROUNDING and it not isolated from the hull. Generally speaking readings of .85 and higher would be an indication of protection in fresh water.
safe boating,
dave
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