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3. In the top line, "TRANSFER INTERVAL" is displayed. The bottom line will indicate a number of hours
in the range of 1 to 5000. It is factory set at 24. This is the number of hours that this machine will stay
in the role of "lead" compressor.
Normally it is desirable to set this to the same value on all sequenced units to equalize running hours.
Different values may be programmed, if desired, to help equalize hours.
4. In the top line, "LAG START DELAY" is displayed. The bottom line will indicate a number in the
range of 1 to 600 seconds. It is factory set at 30. This is the length of time this machine will wait
before starting when the pressure drops below the reset point. This delay period begins when a
previous member of the system is loaded. This should be set to the same value for all sequenced
units. Its setting will depend on the amount of air storage volume in the system. Too small a number
will result in more compressors being started than is necessary to satisfy demand.
5. The controller displays "BAUD RATE" on the top line, and a selection of "1200" or "9600" on the
lower line. 1200 baud is recommended for most applications. The 9600 baud rate may be used for
higher data transfer rates. All units in the system must be set the same. Select the desired value,
and press [ENTER].
6. This completes the sequence adjustments. The controller will return to the main adjustments menu.
Configuration Adjustments
1. In the top line, "HI SYS PRES LIM" is displayed. The bottom line will indicate a value that is factory
set 20 - 25 PSI above name plate. This is the pressure that will cause a shutdown if exceeded due to
a malfunction such as a stuck inlet valve or broken control line. This should be set at or slightly below
the rating of the pressure relief valve. The controller will attempt a number of actions as it
approaches to prevent the pressure from reaching this limit.
NOTICE
The controller will automatically adjust the set and reset pressures as required
if this limit is lowered.
2. In the top line, "REMOVE SYS PRESS" is displayed. The bottom line displays the current pressure
being sensed at the package discharge. At this point, steps must be taken to ensure that system
pressure is, in fact, zero psig. Remove the pressure line to the system pressure transducer.
Pressing [ENTER] will now cause the controller to calibrate the transducer output to zero PSIG.
Obviously, pressure measurement errors will be encountered if 'zeroing' is done with pressure at the
transducer. If large errors are detected, the controller will demand that the transducer be checked.
3. In the top line, "REMOVE RES PRESS" is displayed. The bottom line displays the current pressure
being sensed in the reservoir. The reservoir pressure transducer may now be 'zeroed' by following
the steps outlined in step 2 above.
4. This completes the configuration adjustments. The controller will return to the main adjustments
menu.
Summary of Contents for AUTO SENTRY RS2000
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