NovaLynx Corporation
255-110x-B
Page 9
March 2021
6.
Compare the actual readings with the expected readings at each measured point, and determine
the Pass/Fail status.
Remedial Steps
If the white stripe is not between 12:00 and 1:00 o'clock at the starting point (9.00" or 228.6 mm),
the sprocket may have slipped on the shaft and be out of position.
If the readings on the display are progressively worse the farther the sprocket is turned, the
potentiometer may be out of specification, or there is added resistance in the circuit. Check all
connections.
If successive readings are non-linear then the potentiometer may need to be replaced.
The measured depth of water and the display will not agree when calibrated to the generic
settings, because the amount of water required to raise the float is not accounted for. This is
normal as the amount of evaporation is
relative
(i.e. the difference of two readings). If precise
agreement is desired, the display can be re-calibrated (Section 2).
Reassembly
Refer to Section 7 for instructions on synchronizing the chain and sprocket. Replace the cover of the
evaporation gauge. Fill the evaporation pan and take a reading after the water has settled.
inches
millimeters
inches
millimeters
9.00" Starting point
9.000
228.6
±0.074
±1.9
Rotated 60°
7.333
186.2
±0.074
±1.9
Rotated 120°
5.666
143.9
±0.074
±1.9
Rotated 180°
4.000
101.6
±0.074
±1.9
Sprocket Position
Expected Value
Measured Value
Acceptable Limit
Pass Fail
