SECTION 6.0 - SENTRY II PLC PROGRAMMING
6.1 Sentry II Programmable Features, Options, and Recommendations
The Sentry II offers the following programming options, allowing the cooling and washing procedures
to be customized for each specific installation:
Note 1: Standard program only, not available with Japan program.
Note 2: Japan program is programmable for cold or warm sanitize cycle only. Acid cycle temperature is not adjustable.
Sentry II with Auto-Dosing Assembly Operating Instructions 41 Effective April 1, 2000
Programming Selectable Reference
Feature Description and Recommendations Options Section
Cooling Delay Allows the user to initiate a delayed start of the bottom refrigeration 0-120 min. Sec. 6.2
Bottom Unit(s) unit(s) at the onset of the first milking. (1-10)
Select a time delay that will delay the start of the bottom refrigeration
unit(s) until an adequate amount of milk has entered the cooler and made
contact with the agitator blade.
Cooling Delay Allows the user to initiate a delayed start of the side refrigeration unit(s) 0-120 min. Sec. 6.2
Side Unit(s) at the onset of the second, third, or fourth milking. (11-15)
Select a time delay that will delay the start of the side refrigeration unit(s) until
a sufficient amount of milk has entered the cooler to cover
1
/
3
of the side
evaporator(s). NOTE: Time starts after bottom unit delay.
Pre-Start Allows the user to pre-start the agitator(s) and refrigeration 30 min. Sec. 6.2
Cooling unit(s) at the onset of the second, third, or fourth milking. Pre-Start or (16-20)
Cooling is disabled at 34°F (1.1°C) for freeze protection. 60 min.
Dependent upon fill rate into milk cooler.
Pre-Start Allows the user to pre-start the agitator(s) to blend incoming milk at the 30 min. Sec. 6.2
Agitate Only onset of the second, third, or fourth milking. or (21-25)
Dependent upon fill rate into milk cooler. 60 min.
Interval Allows the user to select an interval agitation time period to ensure proper On-3 min. Sec. 6.2
Agitation agitation of the milk. every 18 min. (26-30)
Timer or
Select 3 minutes every 30 minutes for 1,600 gallon and smaller milk coolers On-3 min.
and 3 minutes every 18 minutes for 2,000 gallon and larger milk coolers. every 30 min.
Sample Allows the user to select a time period that ensures adequate agitation for 2, 5, or 10 Sec. 6.2
Agitation proper milk sampling. min. (31-37)
Timer Select 5 minutes for 1,600 gallon and smaller milk coolers and 10 minutes
for 2,000 gallons and larger milk coolers.
Pre-Rinse Allows the user to select the fill water temperature for the Pre-Rinse Cycle. Cold Sec. 6.2
Fill or (38-42)
Temperature Follow your chemical supplier’s recommendations. Warm
Automatic Allows the user to select the option of an automatic Fifth-Cycle at the end On Sec. 6.2
Fifth-Cycle of a complete wash. or (43-47)
(See Note 1). Off (See Note 1).
Cycle Sequence: Pre-Rinse, Rinse, Wash, Post-Rinse, Selectable Fifth Cycle.
Normally programmed “On” for acid rinse. Follow your chemical supplier’s
recommendations.
Fifth-Cycle Allows the user to select Acid or Sanitizer for the chemical injection during the Acid Sec. 6.2
Acid or Fifth-Cycle. or (48-52)
Sanitize Normally programmed for Acid Rinse. Follow your chemical supplier’s Sanitizer (See Note 1).
(See Note 1). recommendations.
Fifth-Cycle Allows the user to select the fill water temperature for the Fifth-Cycle, Acid, Cold Sec. 6.2
Fill Temperature or Sanitize. or (53-57)
(See Note 2). Follow your chemical supplier’s recommendations. Warm (See Note 2).
Full Allows the user to select a 45-minute delayed start for the complete None Sec. 6.2
Wash Automatic Wash Cycle. or (58-62)
Delay Recommended for installations where the milk cooler and milking 45 min.
equipment are normally washed at the same time. The 45-minute delay
will allow adequate time for the water heating device to recover, and
generate sufficient hot water for washing the milk cooler.
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