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H. Conductivity Calibration
All MicroTron™ model R conductivity units are factory calibrated for conductivity. The reading
should be verified for accuracy and adjusted as per the instructions listed below.
Model R conductivity units can be calibrated by leaving the cleaned probe in a known solution and
entering that value in the calibration screen of the menu. The zero point may be calibrated with
the probe out-of-solution and dry by entering zero in the reset zero screen of the menu.
See Set-Up Mode Menu Map on Page. 11.
Model RD units include a user selectable chemical feed timer. The operator can choose one of
the five different feed modes below that best meet the systems needs.
1. No Timer -
This selection allows the pump to feed for the same amount of time as the unit
bleeds.
2. Lockout Timer -
Chemical feed is simultaneous with bleed. The timer can be set from 1-99
minutes and limits the amount of feed time to the timer setting during any bleed cycle preventing
overfeed. If set to 0, the limit time is disabled.
3. Post Bleed Timer –
Chemical feed occurs after a bleed cycle. The timer can be set for 0-100%
of the post bleed time. The timer also has a total feed time limit, which can be set from 0-250
minutes.
4. Pulse Timer –
This timer accepts pulses from a make-up contacting head water meter. It can
accumulate 0-250 contacts to activate the feed timer. The timer can be set from 1 second to
10 minutes and 59 seconds.
Note: A two wire cable connected to the pump is supplied for connecting to a contacting
head water meter in the make-up water line. If this feed mode option is not selected, the
cable will not be used and can be left unattached.
5. Percent Timer –
Chemical feed is turned on for 0-100% of a 10-30 minute repeating cycle
time.
6. 28 Day Timer –
Chemical feed is turned on for an amount of time, but only on certain days.
See Feed Timer Menu Map on Page 12
VI. Feed Timer Options for Model RD
