Sigma Controls 700 Series User manual

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700 SERIES “BMS” II
BUBBLER MONITORING SYSTEM
VISIT OUR WEBSITE AT SIGMACONTROLS.COM
700 SERIES BMS II MANUAL 062114

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TABLE OF CONTENTS
INTRODUCTION………………………………………… 3
Physical Specifications
WIRING…………………………………………………… 5
PROGRAMMING & SETUP…………………………….. 6
WARRANTY………………….…………………………... 7

INTRODUCTION
The Bubbler Monitor is a state of the art microprocessor based instrument designed to monitor
and control duplex air compressors in a level bubbler system. Duplex alternation of compressors
assures even wear.
Monitoring of individual compressor discharge pressure allows for a failed compressor to be
removed from service and the unused compressor to be brought on-line ensuring a consistent
air supply.
A differential switch across the variable area flow meter checks for an unobstructed dip tube. In
the event of a dip tube blockage, the differential switch activates a flow fail LED and alarm
output.
LED indicators provide status of inputs and outputs. Compressor alternation is automatic on
user-selected cycle or on demand via push button.
SPECIFICATIONS
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ΣΣ
Σ Power Supply: 24VDC + 20% @ 4VA
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ΣΣ
Σ Relay Output: 10A @ 120VAC
(4) 8A @ 0VDC
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ΣΣ
Σ Input Switch: Open Circuit 0VDC
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ΣΣ
Σ Temperature Operating: -20° C to +60° C
Storage: -40° C to 85° C
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ΣΣ
Σ Relay Life: Electrical 10o0K Cycles
Mechanical 10,000K Cycles
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ΣΣ
Σ Terminations: Screw Terminal Barrier Strip
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ΣΣ
Σ LED Indicators: Status (Green)
Flow OK
2 Comp 1 Run
Comp 2 Run
System OK
Alarm (Red)
1 Supply Fail
2 Flow Fail
Compressor 1 Alarm
4 Compressor 2 Alarm

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WIRING DETAIL
A e ectrica wiring must be in accordance with a oca , state and
nationa codes that app y.
Do no exceed the rated current of the D.C. power supp y (1.5A)
or Form ‘C’ re ay outputs (5A/240VAC resistive).
Hazardous vo tages are present within the enc osure.
Insta ation or service shou d on y be carried out by trained
personne .
!
!
CAUTION
WARNING

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PROGRAMMING & SETUP
The BMS contains 16 LED indicators and function keys. Only minimal programming is
required for operation.
A) Alternation – the unit will automatically alternate the compressor
permissive relays as follows:
1) Hold the ‘RESET’ button down for seconds to ‘force’ air compressor
alternation cycle.
2) Hold the ‘TEST’ button down for seconds until the relays energize.
All LED’s will be lit at this time.
The ‘program’ LED will be illuminated and one of the alternation line
indicators will be lit.
Press the ‘ACK’ button to scroll from A to C lights under the program light.
With light ‘A’ illuminated, compressors will alternate every 240 minutes,
Light ‘B’, selected by pressing the ‘ACK’ button allows selection of ‘B’ and ‘C’.
‘B’ position provides a 480 minute alternation cycle and ‘C’ position provides
a 720 minute alternation cycle. Press ‘RESET’ to save the change and exit
program menu.
OPERATION
Three pressure ports are provided on the unit as follows:
Pressure port 1 is supply pressure from compressor 1
Pressure port 2 is supply pressure from compressor 2
Pressure port is output pressure to the dip tube and is varied by the flow meter valve.
Each air supply input is monitored by a pressure switch to confirm air supply.
The flow output is monitored by a differential pressure switch to confirm air flow. Should the
air flow stop due to a plugged dip tube the differential switch will cause the ‘flow fail’ LED
to illuminate.
Any alarm occurrence is indicated by the specific status light changing from green to red.
Alarms can be reset (after the causal condition has been cleared) by pressing the reset button.
OUTPUTS
Four relays are provided rated at 5A @ 120oVAC. Relay function as follows:
Relay 1: Compressor 1 permissive
Relay 2: Compressor 2 permissive
Relay : Warn Output

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All Sigma Controls, Inc. products are warranted to
be free from defective materials and workmanship
for one (1) ear from date of shipment. Sigma
reserves the right to repair or replace at its option
an product found to be defective. In no event shall
Sigma Controls, Inc. be liable for an consequential,
incidental, or special damages and the limit of its
liabilit shall not exceed the purchase price of the
supplied equipment.
RETURN FOR REPAIR POLICY
(WARRANTY/NON-WARRANTY REPAIR)
Return status can be determined upon factor
inspection of returned equipment.
A completed Return Authorization form must
accompan all items returned for repair.
Repairs will be evaluated as quickl as possible. Cost
for non-warrant repairs will be provided before
repairs are initiated and repairs will be completed
onl after approval b customer.
WARRANTY
217 South Fifth Street, Perkasie, PA
PH: 215-257- 412 FAX: [phone]