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MICRODOS V-MS Manual De Regulación página 50

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GAIN CALIBRATION
Switch off V-MS and reconnect the 4-pin connector of FIG. 7 above to allow V-MS to read the measurement by the probe
of chlorine. Pay attention to the color of the cables.
The brown wire is the Platinum and must be connected to the lowest position of the connector (22).
The blue wire is the copper and must be connected to the location immediately close to that of Platinum 23.
(Refer to the FIG. 7 on the previous pag)
Switch on V-MS.
RECOMMENDATIONS: before doing GAIN calibration, PAY ATTENTION TO THE FOLLOWING INSTRUCTIONS:
1) it is necessary to stabilize the water flow by turning the knob regulation till the floater stays in the upper position (60l/h).
This is important because the right water flow rate allows the glass spheres to clean adequately the cupper surface.
2) Before calibrating the GAIN of the chlorine probe, stabilize the pH at the working conditions.(We recommend to choose
a value from 7.0 to 7.3pH).
3) It is necessary to do the Chlorine gain calibration at concentration values nearest possible to the desired setpoint. For
example if the chlorine concentration desired is 1.20ppM it is strictly recommended to do the gain calibration with water in
those conditions. Use a DPD1 photometric test to check the chlorine concentration in the water sample taken from the Tap
(see the figure here below).
It is recommended to do the gain calibration after at least 2 or 3 hours of optimal working conditions, or
alternatively it is possible to do a first gain calibration after having installed V-MS and the probe in the plant and
then do the definite calibration after 24 hours of work of the probe. After having stabilized the flow and the pH and
having stabilized the chlorine concentration at the optimal and desired value. wait for the stabilization of the reading on the
display.
Keep pressing Enter button for 3 seconds to
enter in the main Menu. Move the cursor to
Calibration and press Enter
Rev 6.0
Do a DPD1 test on the water sample taken from the Tap of the probe holder (E).
Cod. 00.008.764
A =
water inlet
B =
flow sensor
C =
water outlet
D =
chlorine sensor
E =
tap water sample
F =
water flow regulation
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