Regal 3000 Series Training manual

INSTRUCTION BULLETIN 13000
1044 SE Dixie Cutoff Road, Stuart, Florida 34994 USA
Phone: [phone] Fax: [phone]
www.regalchlorinators.com Email: [email protected]
REGAL GAS DETECTOR
Series 3000
The REGAL Series 3000 Gas Detector (Chlorine or Sulfur
Dioxide) is a very important accessory item that should
be part of ALL Regal Gas Feed System installations.
The REGAL Series 3000 Gas Detector is a safety device
that is as important as a gas mask or self contained
breathing apparatus. It should not be deleted from the
system solely on the basis that current regulations in
a given geographical area do not specifically require
this item.
A properly installed and calibrated REGAL Series 3000
Gas Detector can save lives and protect equipment and
property from the effects of these gases by providing
warning of gas leaks AS SOON AS THEY OCCUR. Properly
installed, calibrated and maintained, REGAL Series
3000 Gas Detectors can accurately sense and display
the presence of free Chlorine or free Sulfur Dioxide in
the environment at levels below those mandated by
OSHA and throughout the working life of the unit.
IMPORTANT NOTES AND WARNINGS
1.All software including design, appearance, algorithms and
source codes are copyrighted and owned by Chlorinators
Incorporated.
2. The entire contents of this manual MUST be read and understood
prior to installing and operating this equipment.
3. DO NOT discard this instruction manual upon completion of the
installation as this manual contains information essential to the
safe handling, operation and maintenance of this equipment.
4. Additional instruction manuals are available at nominal cost from
Chlorinators Incorporated.
5. Plastic pipe or tubing connector fittings may be broken or
damaged if tightened excessively. HAND TIGHTEN ONLY.
6. For maximum operation, the installation should be indoors so
that the minimum and maximum temperature limitations as listed
in the “TECHNICAL SPECIFICATIONS” section of this manual
are not exceeded.
7. This equipment is suitable for use only with the gases specified.
DO NOT USE THIS EQUIPMENT WITH OTHER GASES. Such
usecan result in failures having hazardous consequences.
8. To insure proper and safe operation of this equipment, use only
REGAL parts. The use of non-REGAL parts can result in equip-
ment failures having hazardous consequences and voids the
REGAL warranty.
9. Maintenance should be performed by qualified personnel familiar
with this type of equipment, such as Chlorinators Incorporated
themselves.
10. It is essential that all external wiring be done exactly as shown
on the diagrams depicted in this manual. Incorrect wiring or
improper grounding of this equipment WILL cause improper
operation and presents a safety hazard.
11. Field wiring MUST conform to national and local electrical
codes.
12. Disconnect power BEFORE removing the cover or servicing
this equipment.
13. ALWAYS make sure that the cover is in place and securely
fastened to prevent the entry of moisture, water or corrosive
gases and also to eliminate the potential for electrical shock.
14.Any equipment powered by AC line voltage presents a potential
shock hazard. Installation and servicing of this equipment
should only be attempted by qualified electronics technicians.
15. Damage to the circuit boards or internal components incurred
by drilling the enclosure for field wiring or connecting power
lines to low voltage signal terminals VOIDS the warranty.
16. Ground MUST be provided as part of the installation.

2
CHLORINATORS INCORPORATED ONE (1)
YEAR LIMITED WARRANTY
Chlorinators Incorporated (hereinafter called "C.I.") sets forth
the following warranties with respect to its REGAL Series 3000
Gas Detector. This warranty does not apply to the purchase of
spare parts or other services performed by C.I. or its authorized
Dealers. This represents the entire agreement between C.I. and
Buyer (also referred to as "end-user") and shall apply unless
modified in writing and signed by a C.I. Officer, and this
warranty and its intended terms shall supersede any prior
negotiations, correspondence, understandings, or agreements,
written or oral. The Buyer agrees to and accepts all terms of this
warranty by its contracting for or acceptance of C.I.'s products,
and forms or other documents or statements issued by Buyer or
any other person shall not modify or otherwise affect any of the
following terms. Buyer should be aware that reseller must rely
entirely upon Chlorinators Incorporated's warranties, or assume
their own responsibility.
The following states C.I.'s entire warranty and
represents Buyer's exclusive remedy with respect
to its product. Such warranties are expressly
given in lieu of any other warranty, expressed or
implied, including but not limited to those of
merchantability and fitness for a particular
purpose. This expressed warranty or any other
warranty implied by law shall not cover defects
due to accident, improper use, or non-compliance
with C.I.'s operating and maintenance, assembly,
installation manual and instructions.
Recommendations and advice as to specifications, capabilities,
design, installation, engineering, application, and use of products
are provided as an accommodation, and are intended only as
suggestions. C.I. assumes no liability for such recommendations
and advice, and they are not to be construed as constituting any
warranty, expressed or implied.
TERM OF WARRANTY
C.I. warrants its REGAL Series 3000 Gas Detector for a period
of one (1) year from date of shipment from C.I. Date of shipment
from the factory shall be determined solely on the basis of the
serial code affixed to the Gas Detector's enclosure. The serial number
contains a date code. All serial numbers are also registered by
Chlorinators Incorporated as to date of shipment, model number,
accessories, options, and billing name. If the serial number is
missing, defaced, changed, or in any way rendered unreadable,
Chlorinators Incorporated shall, at its option, have the right to
declare the warranty void. If the serial number does not match
the registered model number as to, but not limited to, such items
as accessories or options, the same shall apply.
The warranty shall apply against material defects in components
and workmanship occurring in the course of manufacture.
Buyer's sole remedy for breach of said warranty shall be, at C.I.'s
option, either repair or replacement of any unit which is received
by C.I. at its plant in Stuart, Florida (shipping charges prepaid by
buyer), within the time period set forth above and which is found
by C.I. to be defective by reason of manufacture.
Notwithstanding the foregoing, C.I. shall not be
liable to Buyer for damages, including personal
injury or death to any person or persons, or
claims of any kind by a third party or property
damage, or loss of business or profits. In no
event shall C.I. be liable to Buyer for
consequential or accidental damages of any
kind, even if C.I. was aware of the possibility of
such damages. There are no remedies except
those set forth. Further, that there are no other
authorized warranty repair facilities other than
those at the Chlorinators Incorporated factory in
Stuart, Florida.
EXCLUSIONS
The following are considered external environmental factors
beyond the control of C.I., and which may cause damage and/or
need for service which will be specifically excluded from this
warranty (i.e., not a material defect in components and
workmanship occurring in the course of manufacture).
1.Damage by extraneous causes such as fire, water, lightning,
chemical or galvanic attack, etc.
2.Damage to the circuit boards or internal components incurred
by drilling the enclosure for field wiring.
3.Damage due to the connection of power lines to low voltage
signal terminals.
4.Physical damage due to force, dropping, misuse or other abuse.
5.Use other than that as described in this Instruction Manual
(misapplication).
6.Repair by someone other than Chlorinators Incorporated.
7.Improperly installed.
8.This warranty DOES NOT cover wear items subject to periodic
replacement such as sensors, fuses, batteries, o-rings, gaskets,
seals, packing, etc.
The exclusions listed above are provided for purposes of
clarification, and are not intended to, in any way, limit or
eliminate other possible exclusions.
NO OTHER WARRANTIES
Unless otherwise explicitly agreed in writing, and signed by a
C.I. officer, it is understood that this is the only written warranty
given by C.I. for the systems and components stated.
The dealers or representatives of C.I. may not
make verbal representations that add, modify or
change the written warranties contained herein
or change the extent and nature of C.I.’s liability.
In no event shall C.I. be liable for direct,
consequential, special, incidental or punitive
damages of any kind, with respect to the product,
including but not limited to those which may
allegedly arise out of breach of warranty, breach
of contract, negligence, strict liability, or any
other law, governmental regulation, or court
decision, except as provided herein.

3
REGAL REGISTRATION CARD
IMPORTANT: To further establish your warranty and to enable us to contact you should
the
need arise, please fill out this card and return it promptly. Please do it now. Thank you. Chlorinators Incorporated, Stuart, FL is the only authorized Warranty Repair facility for REGAL GAS DETECTORS/SMARTVALVES.
PLEASE PRINT, THANK YOU
Gas Detector/SMARTVALVE Serial No.(s)* 1._________________ 2._________________
*Serial No. plate located inside unit on the right
Purchased From __________________________________________________________
Your Name ____________________________________________
Title_______________
Organization
______________________________________________________________
Mailing Address ____________
_______________________________________________
City _____________________________________ State _____________ Zip
___________
Phone (__________) _____________________________________ Ext. ____________
CONTENTS
1.0
GENERAL
2.0
MODEL NUMBER DESIGNATION
3.0
RELAY OPERATION
4.0
OPTIONAL BATTERY BACK-UP OPERATION
5.0
INSTALLATION
6.0
WIRING
7.0
START-UP AND OPERATION
IMPORTANT:
Please mail or fax this registration form
to establish your warranty.
REGAL Registration Card
8.0
SPECIFICATIONS
9.0
CALIBRATING THE DETECTOR (AUTOCAL)
10.0
SERIAL COMMUNICATIONS
11.0
SENSOR CROSS-SENSITIVITY DATA

4
PLACE
STAMP
HERE
CHLORINATORS INCORPORATED
1044 SE Dixie Cutoff Road
Stuart, FL 34994-3436
DRAWINGS
Drawing No. 1
Display/CPU Circuit Board #4100
Drawing No. 2
Power Supply/Relay Circuit Board #8300
Drawing No. 3
Typical Wiring Drawings –
Analog Output Circuit Board #8400
and Serial Communications
Output Circuit Boards #8500-1 and 8500-2
Drawing No. 4A
Typical Installation Drawing – 1 Sensor Detector
Drawing No. 4B
Typical Installation Drawing – 2 Sensor Detectors
Drawing No. 5
Detector Face Plates
IMPORTANT:
Fill out and mail or fax the form on the reverse side
to establish your warranty.
Drawing No. 6
Typical Wiring Diagram Showing Detector Relay
Interfaced With Chlorine Room Exhaust Fan
Drawing No. 7
Connecting The REGAL VAC/AL-1 Remote Alarm
Horn/Light To The Detector Relays
Drawing No. 8
Sensor Replacement Drawing/Procedure
Drawing No. 9
Engineering Data Sheets – Enclosure Dimensions

5
1.0 GENERAL
REGAL Series 3000 Gas Detectors are designed for use
wherever chlorine or sulfur dioxide is stored, distributed, or
used in a process or any place where potential leakage of
these gases would pose a risk to personnel, property and/or
the environment.
Properly installed, calibrated, and maintained, REGAL
Series 3000 Gas Detectors can accurately detect and display
the presence of free chlorine or free sulfur dioxide in the
environment at levels below those mandated by OSHA
throughout the working life of the sensor(s) used.
The basic system includes a wall mounted monitor with
one or two remote wall mounted sensors. Sensors are
furnished as standard with 25' length of cable. Cable
lengths can be extended up to 1,000'.
The front cover of the REGAL Series 3000 Gas Detector
includes the following displays:
• A three digit “Numeric Display” to indicate instantaneous
gas concentration in mg/l (PPM). On dual sensor units,
the numeric display alternates in presenting the gas
concentration of each sensor as indicated by the arrow-
head LED indicator at the bottom of each bargraph.
• Separate LEDs to indicate which gas (chlorine or sulfur
dioxide) is being monitored.
• A twelve LED four color “Bargraph” that mimics the
numeric display and indicates alarm event conditions via
WARNING and DANGER LEDs. The highest bargraph
LED activated during a leak event remains latched
(requiring a manual reset) even as the gas concentration
decreases. This safety feature indicates the approximate
magnitude of the leak even if the display returns to zero.
Dual sensor gas detectors have two bargraphs.
• A “Battery” LED lights whenever the unit is being operated
from the OPTIONAL Battery Back-Up.
• A “Program” LED lights when the unit is in the Program
Mode.
• An “Alarm Disable” LED lights to provide an indication
that the alarm relays have been disabled for a “timed
15-minute period.” This feature allows the user to
perform operational tests of the sensor(s) without setting
off external alarms.
• A “Latch” LED lights whenever the internal (user
adjustable) latch relay timer causes the WARNING and/or
the Latch Relay to activate thereby requiring a manual
reset after the alarm condition is cleared.
• A four button “Keypad” is included for all operator normal
and programming functions.
REGAL Series 3000 Gas Detectors include six relay
circuits (2 Warning, 2 Danger, 1 Horn/Failure and 1 Latch).
The two WARNING relays, the LATCH relay and the
HORN/FAILURE relay are SPDT. The two DANGER
relays are DPDT. All relays are rated at 10 Amps @ 250
VAC, 50 or 60 Hz.
All single sensor detectors include a single, isolated and
unpowered 4-20 mA DC analog output circuit board (8400-3).
All dual sensor detectors include a dual, isolated and
unpowered 4-20 mA DC analog output circuit board (8400-4).
Power for the analog output loop is accomplished using
a DC Power Supply not furnished by Chlorinators
Incorporated. The Power Supply can be 12 VDC minimum
to 30 VDC maximum. 12 or 24 VDC Power Supplies are
fairly common and can be purchased from many sources.
A 12 VDC Power Supply allows the analog output signal to
transmit into a maximum of 300 Ohms resistance with no
signal loss while a 24 VDC Power Supply can transmit into
900 Ohms of resistance.
AVAILABLE OPTIONS INCLUDE:
• Battery Back-Up. The battery has the ability to power the
detector for up to a day.
• A Serial Communications Output Circuit Board. This
option is available in either RS232 (#8500-1) or RS485
(#8500-2) interface standards. Either board can be
programmed to communicate in either OPTO-22 or
MODBUS compatible protocol. This circuit can also
output in a continuous send mode of gas concentration
for data logging.

6
2.0 MODEL NUMBER DESIGNATION
The Model Number “blanks” MUST be filled in completely in
ordertoassurethecorrectdetectorandoptionswillbefurnished.
MODEL 300 –
INDICATES
1 = Single Sensor CL2
2 = Dual Sensor CL2
3 = Single Sensor SO2
4 = Dual Sensor SO2
5 = Dual Sensor CL2 & SO2
INDICATES
C = RS232 Serial Communications output circuit board (#8500-1).
D = RS485 Serial Communications output circuit board (#8500-2).
E = Battery Back-Up.
3.0 RELAY OPERATION
4.0 OPTIONAL BATTERY BACK-UP
OPERATION
When the OPTIONAL Battery Back-Up is used, the unit will
continue to operate during AC power outages. During the
outage, all front panel displays are turned off except for the
“BATTERY” LED to conserve battery life. If the user wishes
to view the monitor displays during the power outage, he
can turn on the displays for approximately 10 seconds
(20 seconds for dual sensor monitors) by pressing ANY
keypad button.
A charging circuit in the monitor keeps the battery in a fully
charged ready state. If the battery voltage degrades to
between 10.5 and 8.5 Volts while under battery power, the
“BATTERY” LED “blinks.” If battery voltage degrades to
less than 8.5 Volts, the REGAL Gas Detector is shut off
and the battery MUST be charged or replaced. The monitor
may have to be reset by turning the AC power off then on,
after the battery drops below 8.5 Volts.
Life expectancy of the battery is about 3 years before a
normal cell failure occurs. The battery has the capacity to
power the monitor for up to one day.
The WARNING relays activate at 1 PPM for chlorine and at
2 PPM for sulfur dioxide leak events. The DANGER relays
activate at 3 PPM for chlorine and at 5 PPM for sulfur
dioxide leak events. On a single sensor detector, both
WARNING relays and both DANGER relays activate
during an appropriate alarm event. On a dual sensor detector,
one WARNING and one DANGER relay is dedicated to
each sensor.
All remote alarm devices connected to the HORN/FAILURE
relay can be silenced (turned off) during an alarm event
using the SILENCE keypad button. All remote alarm
devices connected to the LATCH relay WILL NOT activate
until the latch time as set by the operator is reached unless
overridden by a DANGER event. All relays except for the
HORN/FAILURE relay can be set for normal or failsafe
operation.
5.0 INSTALLATION (See Drawing #4)
The gas sensor(s) are connected to the monitor with 25' of
cable when shipped from the factory. If the sensor(s) must
be disconnected from the monitor in order to route the cable
through a wall for instance, be sure to observe correct polarity
of the signal line when reconnecting the cable to the monitor
terminals. SEE DRAWING #1.
The monitor enclosure is designed for wall mounting at eye
level to an inside wall in order to assure that the temperature
limitations (SEE SPECIFICATIONS) ARE NOT exceeded.
If the monitor MUST be mounted outdoors, it should not be
installed in direct sunlight as this makes it difficult to see the
displays. Protect the unit from moisture due to condensation,
splashing, hose sprays and rain.
5.1 Remove the front cover from the monitor enclosure
by unscrewing (counter clockwise) the four corner
screws.
5.2 Mount the monitor enclosure to the wall with four
screws inserted into the corner openings that the
cover screws were removed from.
5.3 The gas sensor(s) mount to the wall using two
screws through the tab openings on each side of the
sensor enclosure.

7
IMPORTANT: SENSOR LOCATIONS MUST BE CARE-
FULLY CHOSEN TO ASSURE A GAS LEAK WILL BE
DETECTED AS SOON AS IT OCCURS. THE FOLLOWING
MUST ALSO BE TAKEN INTO CONSIDERATION.
1. ALWAYS MOUNT THE SENSOR WITH THE OPENING
POINTING DOWNWARDS.
2.MOST SENSORS RESPOND TO GASES OTHER
THAN THOSE THEY ARE DESIGNED FOR SO CARE
IS NECESSARY TO ASSURE INTERFERENT GASES
ARE NOT PRESENT IN AREAS WHERE THE SENSORS
ARE TO BE MOUNTED.
3.FOR GASES HEAVIER THAN AIR, SENSORS
SHOULD BE INSTALLED A MAXIMUM OF 18"
(PREFERABLE 6") ABOVE FLOOR LEVEL. FOR
GASES LIGHTER THAN AIR, SENSORS SHOULD BE
INSTALLED AT A LEVEL HIGHER THAN THE GAS
CONTAINER AND/OR THE GAS FEED SYSTEM
COMPONENTS.
4.AVOID WATER. DROPLETS ADHERING TO THE
SENSOR MEMBRANE WILL REDUCE OR NEGATE
SENSOR PERFORMANCE.
5.MOUNTING THE GAS SENSORS NEAR POWER
TRANSFORMERS OR OTHER STRONG ELECTRO-
MAGNETIC FIELDS MAY CAUSE UNDESIRABLE
RESULTS.
6.RAPID AIR FLOW PAST A SENSOR'S OPENING
(TYPICALLY GREATER THAN 1 LITER PER MINUTE)
CAN CHANGE GAS DIFFUSION CHARACTERISTICS
WHICH CAN AFFECT SENSOR PERFORMANCE
RESULTING IN INACCURATE MEASUREMENT. IN
ADDITION, HIGH AIR VELOCITIES CAN REDUCE
SENSOR LIFETIME BY DRYING OUT THE SENSOR
MORE RAPIDLY THAN NORMAL.
5.4 The sensor membrane is protected during shipment
by an o-ring sealed calibration plug with two (2) cap
seals. CALIBRATION PLUG(S) MUST BE REMOVED
AFTER INSTALLATION AND FOR PROPER
OPERATION. Keep this plug for possible future
calibration purposes.
5.5 If the Battery Back-Up option is provided, it is
mounted on the wall next to and within 5' of the
monitor enclosure.
5.5.1 Remove the batteryenclosure cover by removing
the four corner screws.
5.5.2 Mountthe batteryenclosure tothe wall usingfour
screwsinsertedintothecoverscrewholeopenings.
5.5.3 Route the battery cable through the cable grip on
the bottom of the monitor enclosure.
5.5.4 In the monitor enclosure, connect the RED battery
cable wire to the “+” terminal and the BLACK
battery cable wire to the “–” terminal of terminal
block TB4 located on the Display/CPU Circuit
Board. SEE DRAWING #1.
IMPORTANT: DO NOT MAKE THE CONNECTION
STATED IN 5.5.5 UNTIL THE SERIES 3000 GAS
DETECTOR IS OPERATING ON 120 VOLT, AC POWER.
5.5.5 In the battery enclosure, connect the spade
connector on the end of the RED wire to the
RED “+” spade connector of the battery.
5.5.6 Replace the battery enclosure cover.
6.0 WIRING (See Drawings #1, #2 and #3)
The Sensor(s) are connected to the monitor when shipped
from Chlorinators Incorporated. A six (6) foot AC power
cord is connected to the appropriate terminals on Power
Supply Circuit Board #8300. SEE DRAWING #2.
NOTES:
1. All wiring terminations to the alarm relays are via plug in
socket connectors for ease of wiring and to prevent
damage to the printed circuit board.
2. Chlorinators Incorporated has designed state-of-the-art
voltage surge suppressor components into the electrical
circuitry of each electronic device we manufacture.
These internal components provide a last line of defense
to absorb electrical surges and spikes (in most cases)
before they cause irreparable damage. If the surge
suppressors are sacrificed while protecting the
equipment, THEY HAVE DONE THEIR JOB.
For the best possible protection, EXTERNAL surge
suppression devices (SUPPLIED BY OTHERS) should
be a normal part of all electronic component installations.
These should be placed on all incoming AC power
circuits and where applicable, on all incoming DC signal
lines as well. These devices MUST be chosen and sized
properly (particularly those used on 4-20 mA DC signal
lines) to assure maximum protection and to make
sure the suppressor itself does not overload the line
resulting in loss of signal. CONSULT CHLORINATORS
INCORPORATED AS NECESSARY.

8
3. If the gas detector was ordered with the OPTIONAL
Back-Up Battery, a fitting for connection of the battery
cable to Terminal “TB4” of Display/CPU Circuit Board
#4100 is also provided. SEE DRAWING #1. BE SURE
TO OBSERVE CORRECT POLARITY WHEN
CONNECTING THE BATTERY.
DO NOT plug in the battery until the gas detector is
turned on and operating.
IMPORTANT: WHEN THE UNIT IS TURNED ON, ALL
LEDs AND DISPLAYS LIGHT AND ALL ALARM
CIRCUITS ARE DISPLAYED FOR APPROXIMATELY
1 MINUTE TO ALLOW THE ELECTRONICS AND
SENSOR(S) TIME TO STABILIZE. AT THE END OF
THIS TIME, THE UNIT AUTOMATICALLY BEGINS THE
PROCESS OF SCANNING, DISPLAYING AND TRANS-
MITTING READINGS AND ALARM CONDITIONS FOR
THE ACTIVE SENSORS.
6.1 For a dual sensor detector, WARNING relay (RL4)
and DANGER relay (RL1) are dedicated to sensor #1,
and WARNING relay (RL5) and DANGER relay (RL3)
are dedicated to sensor #2.
External alarm devices (audible or visual) are BY OTHERS
and should be field connected to the relay circuits of the
REGAL Series 3000 Gas Detector by qualified electricians
conforming to all appropriate electrical codes.
7.2 Remove the front cover of the gas detector enclosure
and turn on the power switch located on the power
supply circuit board. Alarms are automatically
disabled for approximately 1 minute after startup.
If the operator or user of the system wishes to change any
of the “Programming Mode” Factory Settings, he can do
so at this time. To change factory settings and to set
ALARM RELAY “LATCH” TIME(S), you must enter the
“Programming Mode” by simultaneously pressing the
“NEXT” and “ENTER” keypad button which turns on the
“PROGRAM” indicator and the “ALARM DISABLE” indicator.
7.0 START-UP AND OPERATION
NOTE: While in the Programming Mode, the unit ceases
On the back of Display/CPU Circuit Board #4100 is a four
(4) position DIP Switch which is used to make the following
selections.
A. Switch Position #1 sets the condition of the internal Horn
and the Horn Relay. FACTORY SETTING IS OFF.
a. When in the OFF position, the Horn and Horn Relay
are on continuously until SILENCED or RESET.
b. When in the ON position, the Horn and Horn Relay
“pulse” until SILENCED or RESET.
B.Switch Position #2 is for calibrating the Series 3000
Gas Detector (AUTOCAL). FACTORY SETTING IS OFF.
a. When in the OFF position, calibration functions are
disabled.
b. When in the ON position, calibration functions are
enabled.
C.Switch Position #3. FACTORY SETTING IS OFF.
a. OFF sets the relays for NORMAL operation.
b. ON sets the relays for FAILSAFE operation.
D.Switch Position #4. This switch allows the setting of
Serial Communications Protocol and is only active when
Serial Communications Circuit Board #8500 is installed.
FACTORY SETTING IS OFF. If switch position #4 is
ON, communications protocol setting (choice) is the last
item in the Program Mode list (See 7.6).
7.1 Turn on the AC power circuit supplying power to the
gas monitor.
normal operations; however, at any point in the program-
ming process you can exit back into the normal operating
mode by pressing and holding down the “NEXT” and
“ENTER” keypad button.
While in the Program Mode, you can skip any of the
following parameters, leaving the current setting
unchanged by pressing the “NEXT” keypad button.
KEYPAD BUTTONS MUST BE HELD DOWN FOR AT
LEAST 1/2 SECOND
The digital display indicates “dis” (Disable).
This parameter allows the operator to check the worthiness
of the sensor(s) WITHOUT activating external alarms for a
timed 15-minute period. SEE MORE ABOUT CALIBRATING
IN ANOTHER SECTION OF THIS MANUAL.
7.3 Selecting “dis” disables the alarm relays for 15
minutes then automatically enables them again.
Selecting “en” (Enable) keeps the alarm relays active.
7.3.1 Press the UP or Down Arrow buttons to scroll
between “dis” and “en.”
7.3.2 Press “ENTER” to accept your selection and
the next parameter “rly” is displayed.

9
7.4 “rly” = Relay Test. This parameter runs through a
sequential test cycle of all alarm relays. Initiating this
test takes you to the Operating Mode when complete.
Press “ENTER” to run through a test cycle of all
alarm relays which when complete automatically
takes you back into the OPERATING MODE or
press “NEXT” to proceed to the LATCH Time Setting
(SEE 7.5 BELOW).
7.5 The LATCH LED is lit and the digital display shows 0.
This parameter allows you to set a delay LATCH
time for the WARNING alarm and the latch relay. The
LATCH LED is now on and the digital display is
showing the delay time setting for the first sensor in
seconds before the WARNING alarm relays become
latched into the alarm state.
Press the “UP” or “DOWN” arrow buttons as necessary
to set the delay time (adjustable between 0 and 240
seconds). Factory setting is 0. A setting of 0 turns
off warning alarm latching.
Press “ENTER” to accept your selection.
NOTE: On dual sensor units, the above step will be repeated
for the second sensor. The bargraph “arrow” indicators will
show the sensor the setting is applied to.
7.6 When the OPTIONAL Serial Communications Board
is installed, communication protocol options can be
selected. Options are:
7.6.1 CP0:Noserialcommunications.Withthisselection,
the device will not speak or respond.
7.6.2 CP1: Continuous send for data logging.
7.6.3 CP2: OPTO-22 Protocol selected.
7.6.4 CP3s: MODBUS (ascii) Protocol selected.
8.0 SPECIFICATIONS
8.1 Power Supply:
Input: 100-250 VAC 50/60 Hz. @ 0.6A peak.
Inrush Current: 20A @ 115 VAC, 40A @ 230 VAC.
Output: +15V @ 1.7A current limited.
8.2 Fuse Protection:
2.5 Amps (250 V) for 120 VAC or 240 VAC.
8.3 Input Capability:
1 or 2 Sensors. Must be specified at purchase.
8.4 Sensor Scan Display Rate:
Approximate five (5) second intervals.
8.5 Sensor Signal:
4-20 mA, DC
8.6 Sensor Full Scale Response:
For Chlorine - 10 PPM
For Sulfur Dioxide - 20 PPM
8.7 Resolution:
For Chlorine - 0.1 PPM
For Sulfur Dioxide - 0.5 PPM
8.8 Repeatability:
±5%
8.9 Operating Temperature:
0-50°C (32-120°F).
8.10 Horn:
Internal 95 db.
8.11 Relays:
Warning, Horn/Failure and Latch relays are Single
Pole, Double Throw (SPDT).
Danger relays are Double Pole, Double Throw (DPDT).
Allrelaysarerated@10Amps @ 250 VAC, 50 or 60 Hz.
All relays EXCEPT for the Horn/Failure relay can be
configured for either normal or failsafe operation.
8.12 Delay Timer for WARNING Relays
and the Latch Relay:
Adjustable from 0-240 seconds.
8.13 Analog Output:
A single isolated and unpowered 4-20 mA, DC
Output Circuit Board is standard on all single
sensor detectors.
A dual isolated and unpowered 4-20 mA, DC
Output Circuit Board is standard on all dual
sensor detectors.
NOTE: Analog Outputs require a 12 VDC minimum to 30 VDC
maximum power supply not provided by Chlorinators Incorporated.

10
8.14 Battery Back-Up (OPTIONAL):
12 Volt, 1.1 AH, Lead Acid, gel cell.
8.15 Operating Humidity:
0-99% Non-Condensing.
8.16 Monitor Enclosure:
Wall Mounted Polycarbonate NEMA 4X
(7.87" x 7.87" x 5.25").
8.17 Sensor Enclosure:
Wall Mounted, Watertight, UL Approved
(4.0" x 4.0" x 2.5").
8.18 Serial Communications (OPTIONAL):
RS232 or RS485 using OPTO-22 or MODBUS
(ASCII) Protocol or, continuous send for data logging.
BAUD Rate: 1200-115,200.
8.19 Cable Lengths:
(Based on using 22 gauge, 2-conductor shielded cable)
Sensor Cable Length - 25' Standard. Can be
extended up to 1000'.
Battery Cable Length - 5'.
8.20 Warning/Danger Alarm Points:
For Chlorine - 1 PPM/3 PPM
For Sulfur Dioxide - 2 PPM/5 PPM
9.0 CALIBRATING THE DETECTOR
(AUTOCAL)
The electrochemical sensors used in REGAL Series 3000
9.1.1 Pour approximately 1/4 to 1/2 ounce of
CLOROX into a paper cup or similar container.
9.1.2 Pour approximately 1/4 to 1/2 ounce of
Vinegar into the same container with the
CLOROX.
9.1.3 Swirl the CLOROX/Vinegar solution under the
sensor opening.
The small quantity of chlorine gas created should
almost immediately set off the detectors internal
alarm horn and activate all alarm relays. DISCARD
THE USED CLOROX/VINEGAR SOLUTION USING
APPROVED PROCEDURES.
9.2 To check sulfur dioxide sensors, (USE APPROPRIATE
SAFETY EQUIPMENT SUCH AS GLOVES,
APRON, EYE PROTECTION, ETC.);
NOTE: If external alarm activation during the test is a
problem, selecting “dis” (disable) in the Program Mode
(SEE PARAGRAPHS 7.2 AND 7.3 IN THIS MANUAL) will
disable all alarm relays for 15 minutes, then automatically
enable them again.
9.2.1 Connect a cylinder of sulfur dioxide calibration
gas to the sensor to be calibrated and turn on
for a few minutes to make sure the sensor
responds and alarms.
9.3 IF REGULATIONS OR PERSONAL PREFERENCE
DICTATE A NEED TO CALIBRATE THE REGAL
SERIES 3000 GAS DETECTOR, PROCEED AS
FOLLOWS.
Gas Detectors have proven themselves historically to be
relatively stable for at least one year of service and in many
cases, over the full two-year life expectancy of the sensor(s).
NOTE: Alarm relays are automatically disabled during
AUTOCAL. For best results, follow this procedure in detail.
In most cases, it is unnecessary to calibrate the sensors
during this time period unless regulations or personal
preferences dictate otherwise.
It is, however, suggested that the sensors be periodically
checked to assure they have not reached their end of life
and that they are still capable of responding to gas leaks.
9.1 To check chlorine sensors, (USE APPROPRIATE
SAFETY EQUIPMENT SUCH AS GLOVES,
APRON, EYE PROTECTION, ETC.);
NOTE: If external alarm activation during the test is a
problem, selecting “dis” (disable) in the Program Mode
(SEE PARAGRAPHS 7.2 AND 7.3 IN THIS MANUAL) will
disable all alarm relays for 15 minutes, then automatically
enable them again.
To calibrate a REGAL Series 3000 Gas Detector you MUST
have the shipping/calibration plug originally furnished with
the unit and a fresh cylinder of calibration gas equal to the
span value of the detector (10PPM for Chlorine detectors
and 20 PPM for Sulfur Dioxide detectors).
9.3.1 Turn OFF AC power to the gas detector, then
remove the front cover from the monitor to
gain access to the four position DIP Switch.
9.3.2 CLOSE Position #2 of the DIP Switch to
activate the AUTOCAL program, then reinstall
thefront cover andturnON the AC power circuit.
9.3.3 Wait until the detector electronics and sensor
have stabilized and a 0.00 mg/l (PPM) indication
is presented on the numeric display. This takes
approximately 1 minute.

11
9.3.4 When the sensor to be calibrated is active as
indicated by a lit bargraph “arrow” LED, simul-
taneously press the SILENCE and ENTER
keypad buttons. The monitor locks on that sensor
and the numeric display should indicate “CAL”
for calibrate.
9.3.5 Connect the hose from the pressure regulating
valve on top of the cylinder of calibration gas
to one of the shipping/calibration plug ports.
The other port remains open to atmosphere.
9.3.6 Carefully insert the shipping/calibration plug
with hose attached into the sensor opening to
be calibrated.
9.3.7 Open the valve on the cylinder of calibration
gas and wait the appropriate time interval
(usually 5 minutes) to make sure the sensor is
saturated. At this point, the “CAL” indication
should have changed to the actual PPM value
the sensor is capable of transmitting based on
the calibration gas value the sensor is receiving.
10.0 SERIAL COMMUNICATIONS
REGAL offers a choice of two interface standards, RS232
or RS485.
RS232 employs unbalanced voltage signals and is generally
limited to a speed of 20 Kbps (kilobits per second) and a
distance of 50'. Becausethetransmission method issingleended,
or unbalanced, it is susceptible to EMI and other electrical
noise in the environment. Communication can be full duplex.
RS485 uses a balanced or differential voltage signal. RS485
uses only two conductors for both transmit and receive and
is capable of data rates up to 115 Kbps at distances up to
4000'. Up to 64 devices can be connected and addressed
in multi-point applications through a single port. The
differential voltage transmission method reduces its
susceptibility to electrical noise. Since only two conductors
are used, communication is limited to half-duplex.
When the OPTIONAL Serial Communications Circuit
Board #8500 is provided (RS232 or RS485), the REGAL
NOTE: If the “CAL” indication remains, the sensor has
degraded to less than 50% and is in immediate need of
replacement.
device communicates using either OPTO-22 or MODBUS
(ASCII) protocol. User must select which protocol standard
is to be used (See Paragraph 7.6). Communication
protocol uses:
9.3.8 Press the ENTER keypad button to calibrate
the detector and you are automatically back in
the operating mode. The next scan cycle of
the calibrated sensor should produce an
indicated value of at least 9.90 PPM to
indicate calibration was successful.
9.3.9 Close the valve on the calibration gas cylinder
and remove the shipping/calibration plug from
the sensor opening, then wait until the sensor
purges itself of gas and the displayed value
has returned to 0.00 mg/l (PPM).
9.3.10 If calibrating additional sensors, repeat this
procedure for each sensor.
NOTE: If a mistake is made while calibrating, you can
again enter the calibration program and when the sensor
being calibrated is active, press the RESET keypad button.
This will restore the original factory calibration values.
9.3.11To prevent accidental calibration when no
calibration gas is applied to the sensor, turn
OFF AC power to the detector, remove the
front cover, and OPEN Position #2 of the DIP
Switch, then install the front cover and turn ON
the AC power circuit.
8 data bits, no parity, 1 stop bit and NO handshaking
or
7 data bits, no parity, 2 stop bits and NO handshaking
10.1 In the CONTINUOUS SEND mode, (CP1 Selected),
the REGAL device sends current values every few
seconds in the following format:
SENSOR #
VALUE
UNITS
END
X: XXXX.X XXX CRLF (ASCII 10/13)
The sensor number (1 or 2) is sent even in a single
sensor unit and is followed by a colon (:). The value is
always a 6-character string padded with leading zeros.
Four digits to the left of the decimal point and one
“tenths” digit. This maintains congruity with other REGAL
monitoring devices.
The message is ended with a carriage-return/
line-feed combo (ASCII 10/13). On dual sensor units,
values are sent alternately as separate messages.

12
IMPORTANT:
1. IF OPTO-22 PROTOCOL IS TO BE USED, FOLLOW
INSTRUCTIONS OUTLINED IN PARAGRAPH 10.2 BELOW.
2. IF MODBUS (ASCII) PROTOCOL IS TO BE USED,
FOLLOW INSTRUCTIONS OUTLINED IN PARAGRAPH
10.3 BELOW.
10.2 When CP2 (OPTO-22) is selected, the REGAL
communications protocol. OPTO-22 is a half-duplex,
poll and respond protocol. The monitor waits for a
command message then responds with a return
message.
Command messages take the following format:
START
ADDRESS
COMMAND
DATA
CHECKSUM
(ASCII-HEX)
END
(>) XX X XX XX CR
The start of message character is always the
greater-than symbol (>). Any message without this
start character will be ignored.
The address is a 2 digit ASCII-hex value assigned
to the individual monitor. All messages without the
correct address will be ignored. Valid digits are 0-9
and A-F, lower case a-f are not allowed. The valid
address range is 00-FF. Two characters are always
required even if the first is 0. This applies to the data
and checksum fields as well.
The command is always one character and IS case
sensitive. The REGAL device recognizes only the five
commands below. Any other characters will return
a nak (N).
1. Requests the value from sensor #1.
2. Requests the value from sensor #2.
3. Sets the monitor's internal network address to the
2 digit ASCII-hex value contained in the data field.
For this command, the data field must meet the
same restrictions as the address field above. If
the data field is not valid, a nak (N) is returned.
Default Address = 7F
4. Sets the communication baud rate using a two
digit identifier in the data field as follows:
01 = 1200, 02 = 2400, 03 = 4800, 04 = 9600,
05 = 19.2k, 06 = 28.8k, 07 = 36.4k, 08 = 57.6k,
09 = 115.2k
Default Baud Rate = 1200
B. Request Product ID.
IMPORTANT: LONG DISTANCES BETWEEN INDIVIDUAL
COMPONENTS WILL REQUIRE LOWER BAUD RATES
TO COMMUNICATE PROPERLY. THIS MUST BE
DETERMINED ON A JOB-BY-JOB BASIS.
Response (server) msg:
N (nak) ascii-hex error code
NAK ERROR END
N XX CR
A (ack)
ACK
RET VALUE
(OPT) UNITS
CHECKSUM
END
A XX (XX...) XXX XX CR
Commands: 1, 2, 3, 4, B
1 (read side 1) no value
2 (read side 2) no value
3 (set address) value = ascii-hex address in
range 01h-F7h
4 (set baud) value = ascii-hex baud code
B (product ID) no value
Command Examples:
1 (2) (read side 1 (2)): return value is 4 character
2 byte ascii-hex value, followed by a 3 character
units string.
EXAMPLE: >7F1AE(CR) sent to a detector with a 10
PPM leak at address 7F would return the value of
sensor 1 as A000APPMBD(CR). The returned value
is 000A hex, that is 10 decimal, in units of PPM. The
checksum is BD hex, 189 decimal.
3 (set network address): return value is 2 character
1 byte ascii-hex value.
EXAMPLE: >7F32B24(CR) sent to the gas detector
monitor at address 7F would change its network
address to 2B and return the new address for
verification as A2B74(CR). The checksum is 74 hex,
116 decimal.
4 (set baud rate): return value is 2 character 1 byte
ascii-hex value.
EXAMPLE: >7F40112(CR) sent to the gas detector
monitor at address 7F would change its baud rate to
1200 after returning the value for verification as
A0161(CR). The value, in both the command and
return messages, is always a 2 character ascii-hex
value even though the first character is always 0.The
checksum is 61 hex, 97 decimal.

13
B (request product ID): return value is 26 character
string.
EXAMPLE: >7FBBF(CR) sent to a single sensor
SO2 leak detector at address 7F would return
AREGAL3003XFXXX V1.15D2(CR). The model
number string is always 16 characters even if trailing
spaces exist. The checksum is D2 hex, 210 decimal.
In addition to the carriage-return (ASCII 13) as an end of
message character, REGAL devices also recognize the
line-feed (ASCII 10) and period (.) for OPTO-22 compatibility.
Return messages are either an ack (A) or nak (N). If an error
occurs, a nak (N) is returned followed by an error code and
a carriage-return (ASCII 13). In this case, the command was
not processed. If the command was successfully processed,
an ack (A) is returned. The new address or baud rate will
then be required for any subsequent communications.
TO RESET DEFAULTS
1. Turn OFF the Gas Detector ON/OFF Switch.
2. Unplug Serial Communications Circuit Board #8500.
3. Turn ON the Gas Detector ON/OFF Switch.
4. After the unit stabilizes, press RESET and NEXT keypad
buttons and wait for “rdy” (ready) message.
5. Turn OFF the Gas Detector ON/OFF Switch.
6. Plug in Serial Communications Circuit Board #8500.
7. Turn ON the Gas Detector ON/OFF Switch.
10.2.1CHECKSUM EXPLANATION
This is an error checking field used to verify
that the message received by the REGAL
device matches that sent by the Master control.
It is always a two-character representation of a
hexadecimal value. Allowable characters are in
the range “0” - “9”, “A” - “F”, or the question
mark “?” (ASCII 3FH).
The checksum is calculated by adding the ASCII
values of all the characters in the message
excluding the Start-of-Message character, the
End-of-Message character and the checksum
field. The sum is then divided by 100H (256
decimal). The remainder from the division is
the checksum value. The checksum may be
ignored for an individual command message
by placing “??” in this field. This is included in
the specification for trouble shooting purposes
and is not recommended for normal operation.
10.2.2 ERROR CODES
If an error is detected by the REGAL device, it
will respond with the NAK character (N)
followed by one of the error codes in the list
below. No checksum will accompany the error
message. No messages should be returned
from the Master control in response to errors, nor
should the Master report any errors it detects to
theREGALSlavedevice.Ifnecessarythecommand
should be repeated. If any of these errors
occurs, the command will not be executed.
REGAL devices may return the following error
codes:
01 Undefined Command
The command character was not recognized as
one of the characters in the command set of the
specific REGAL device.
02 Checksum Error
The checksum received by the REGAL device
was not equal to the internal checksum calculated
from the message.
03 Input Buffer Overrun
The message received exceeded the maximum
number of characters allowed for a command
by the REGAL device.
04 Non-Printable or Disallowed Character
Received
The message received contained characters
outside the ASCII range of 21 (33 decimal "!")
to 7EH (126 decimal "~") allowed by OPTO-22
devices.
05 Data Field Error
The message received by the REGAL device
was too short.
06 Invalid Data
The data field was outside the range allowed
for the specified command.
07 Unknown Error
The REGAL device detected an internal error
while executing the command.
10.3 When CP3 (MODBUS (ascii)) is selected, MODBUS
uses LRC (Longitudinal Redundancy Check) instead
of checksum. This value is a slightly modified checksum.
(FFh-checksum) + 1. The start character is always
the colon (:) and the end character is always the
carriage-return/line-feed (CRLF) combination.
NOTE: What is called a command in OPTO-22 is
called a function in MODBUS.

14
START
ADDRESS
FUNCTION
BYTE COUNT
: XX XX XX
RET VALUE
(OPT) UNITS
LRC
END
XX (XX) XXX XX CRLF
Error Codes:
01: Illegal Function. The function code received was
not in the recognized list.
03: Illegal data value. The data value received was
not in the acceptable range for the function.
04: Slave device failure. An internal error occurred
while processing the request.
Functions: 41, 42, 43, 44, 2B
41 (read side 1) no value
42 (read side 2) no value
43 (set address) value = ascii-hex address
44 (set baud) value = ascii-hex baud code
2B (product ID) no value
Functions 41-44: REGAL monitor defined functions
Function request (client) msg:
START
ADDRESS
FUNCTION
(OPT) VAL
LRC
END
: XX XX XX XX CRLF
Response (server) msg: All MODBUS responses include
the start character and the address for verification.
Error: Along with the ascii-hex error code, MODBUS adds
80 hex, 128 decimal, (sets most significant bit) to the
function code to alert the client that an error has occurred.
START
ADDRESS
FUNC+80h
ERROR
LRC
END
: XX XX XX XX CRLF
The MODBUS spec defines other error codes but only the
above are used by REGAL monitors. No error msg is
returned for communication errors, such as checksum or
time-out. The client should simply time-out and try again if
there is no response.
Normal response:
Function Examples:
41 (42) (read side 1 (2)): return value is 4 character
2 byte ascii-hex value, followed by a 3 character
units string.
EXAMPLE: :7F41IE(CRLF) sent to a gas detector
with a 10 PPM leak at address 7F would return the
value of sensor 1 as :7F4107000APPMF9(CRLF).
The returned value is 000A hex, 10 decimal, in units
of PPM. The LRC is F9 hex, 249 decimal. The byte
count field holds the number, in ascii-hex, of bytes in
the data field(s) to read before the LRC. In this
case, 07.
43 (set network address): return value is 2 character
1 byte ascii-hex value.
EXAMPLE: :7F432BA8(CRLF) sent to any gas
detector monitor at address 7F would change its
network address to 2B and return the new address
for verification as :7F43022B46(CRLF). The LRC is
58 hex, 88 decimal. The address field still holds the
old address, but the data field holds the new address.
All subsequent requests must be made to the new
address. The byte count field is 02.
44 (set baud rate): return value is 2 character 1 byte
ascii-hex value.
The two digit baud rate identifier choices are:
01 = 1200, 02 = 2400, 03 = 4800, 04 = 9600,
05 = 19.2k, 06 = 28.8k, 07 = 36.4k, 08 = 57.6k,
09 = 115.2k
Default Baud Rate = 1200
EXAMPLE: :7F4401BA(CRLF) sent to any gas
detector monitor at address 7F would change its
baud rate to 1200 after returning the value for
verification as :7F440201A8(CRLF). The value, in
both the command and return messages, is always a
2 character ascii-hex value even though the first
character is always 0.The LRC is A8 hex, 168 decimal.
The byte count field is 02. This message is returned
using the old baud rate. Then the new baud rate will
be applied for subsequent messages.
2B (request product ID): MODBUS reserved function.
The return data value is a 26 character string broken
down into three MODBUS defined data fields.
MODBUS requires more overhead for this function
than the REGAL defined functions above.

15
START
ADDRESS
FUNCTION
MEI TYPE
: XX 2B 0E
READ CODE
OBJECT ID
LRC
END
01-04 00-FF XX CRLF
Function request (client) msg:
11.0 SENSOR CROSS-
SENSITIVITY DATA
11.1 CHLORINE
The MEI type field is always 0E for this function. The
REGAL monitors return the basic device ID, required
by MODBUS, in a single response msg (read code
compliance level is 01). The read code and object ID
fields are validated, but otherwise unused.
Allowable read codes are 01-04. If a read code other than
01 is sent, the monitor will still respond with a compliance
level of 01.
Response (server) msg:
START
ADDRESS
FUNCTION
MEI TYPE
: XX 2B 0E
READ CODE CONFORMITY MORE NEXT OBJ
01 01 00 00
# OF OBJ 1st OBJ BYTE COUNT DATA
03 00 05 REGAL
NEXT OBJ BYTE COUNT DATA
01 10 XXXXXXXXXXXXXXXX
NEXT OBJ BYTE COUNT DATA LRC END
02 05 VX.XX XX CRLF
All the field values above not denoted by X are literal. The
three data fields are:
00 Vendor Name: REGAL
01 Product Code: 16 character internal model number
02 Major/Minor Revision: software revision number
EXAMPLE: :7F2B0E0100D9(CRLF) sent to a single
sensor SO2 detector at address 7F would return
:7F2B0E01010000030005REGAL01103003XFXXX
V1.13AE(CRLF). The model number string is always
16 characters even if trailing spaces exist, in this
case 7spaces (ascii32). TheLRC isAE hex,174decimal.
NOTE: The model number format is still subject to
change.
The sensors used in all REGAL Series 3000 Chlorine Gas
Detectors may exhibit a response to certain gases in a
sample stream other than chlorine. The table below shows
the typical response of a REGAL chlorine sensor to a
number of common cross-interfering gases. The data is given
asapercentageoftheprimarysensitivity(i.e.,Chlorine=100%).
TYPICAL RESPONSE TO CROSS-INTERFERING GASES
CO H2S SO2 NO NO2 CL2 H2 HCN HCI C2H4
0 ~-20 0 0 ~105 100 0 0 0 0
11.2 SULFUR DIOXIDE
The sensors used in all REGAL Series 3000 Sulfur Dioxide
Gas Detectors may exhibit a response to certain gases in
a sample stream other than sulfur dioxide. The table below
shows the typical response of a REGAL sulfur dioxide sensor
and the expected response when exposed to a given test
gasconcentration(RELEVANTTOSAFETY,e.g.,TLVLEVELS).
GAS CONCENTRATION RESPONSE
Carbon Monoxide 300 PPM
<5 PPM
Hydrogen Sulfide
15 PPM 0 PPM
Nitric Oxide
35 PPM 0 PPM
Nitrogen Dioxide 5 PPM ~-5 PPM
Chlorine 1 PPM <-0.5 PPM
Hydrogen 100 PPM 0 PPM
Hydrogen Cyanide
10 PPM <5 PPM
Hydrogen Chloride 5 PPM 0 PPM
Ethylene 100 PPM 0 PPM

16
DRAWING NO. 1
#4100 Display/CPU Circuit Board
Chlorine and Sulfur Dioxide
1. S1 This is the connector the #8400 Analog Output
(mA) Board or the #8500 Serial Output (Digital)
Board plugs into.
2. TB1 This is the connector the Gas Sensor connects
to if the unit only has one sensor. BE SURE TO
OBSERVE CORRECT POLARITY.
3. TB2 If the unit is a dual sensor Gas Detector, the
second Gas Sensor connects here. BE SURE
TO OBSERVE CORRECT POLARITY.
4. TB4 This is the connector for the OPTIONAL Battery
Back-Up. BE SURE TO OBSERVE CORRECT
POLARITY.
5. JB1 This Jumper is set for Gas Sensor Input(s).
DO NOT CHANGE.
6. JB2 Same as #5.
7. P1 This is the #1 Pin of the Ribbon Cable
Connector. MAKE SURE THE "RED" LEAD OF
THE RIBBON CABLE CONNECTS TO PIN #1.
8. P/N 8400 This is the Analog Output Circuit Board (4-20
Milliamps) that plugs into the "S1" connector of
the Display/CPU board. BE SURE TO
OBSERVE CORRECT POLARITY.
9. P/N 8500 This is the OPTIONAL Serial Communications
Output Circuit Board that plugs into the
"S1" connector of the Display/CPU board.
NOTES:
A. Only one board (8400 or 8500) can be used at a time.
B. DIP Switch Settings are:
1. Switch Position #1
When in the "OFF" position, the Horn and Relay are on
continuously when activated until SILENCED or RESET.
When in the "ON" position, the Horn and Relay "pulse"
when activated until SILENCED or RESET.
2. Switch Position #2
When in the "OFF" position, AUTOCAL is DISABLED.
When in the "ON" position, AUTOCAL is ENABLED.
3. Switch Position #3
When in the "OFF" position, relay operation is NORMAL.
When in the "ON" position, relay operation is FAILSAFE.
4. Switch Position #4
When in the "OFF" position, Serial Communications
Protocol settings are disabled.
When in the "ON" position, Serial Communications
Protocol settings are enabled.

17
DRAWING NO. 2
#8300 Power Supply PCB Assembly
Chlorine and Sulfur Dioxide
INDEX
1. Double Pole, Double Throw DANGER Gas Concentration Alarm Relay (RL1 & RL7) for Sensor #1.
2. Double Pole, Double Throw DANGER Gas Concentration Alarm Relay (RL3 & RL8) for Sensor #2.
3. Universal Power Supply (100-240 VAC –50/60 Hz).
4. Connector for internal Alarm Horn. See #14 below.
BE SURE TO OBSERVE CORRECT POLARITY.
5. Ribbon Cable Connector. MAKE SURE THE “RED” LEAD
OF THE RIBBON CABLE CONNECTS TO PIN #1 (P1).
6. AC Power Fuse.
7. AC Power Supply Connector.
8. AC power ON/OFF Switch.
9. External Alarm Device Connector for DANGER Gas Concentration Alarm Relay #1.
10. External Alarm Device Connector for DANGER Gas Concentration Alarm Relay#2.
11. WARNING Gas Concentration Alarm Relay (RL4) and Connector for Sensor #1.
12. WARNING Gas Concentration Alarm Relay (RL5) and Connector for Sensor #2.
13. LATCH Alarm Relay (RL6) and Connector.
14. Alarm Horn Relay (RL2) and Connector for Horn Circuit.
15. Relay designation as shown on this “blow up” is the same for all relays furnished.

18
DRAWING NO. 3
Typical Wiring Schematics
Chlorine and Sulfur Dioxide
A. Typical wiring schematic of the 4-20 mA Output Circuit Board.
Maximum 30 Volt DC Power Supply
(BY
OTHERS)
+ –
B. Typical wiring schematic of the OPTIONAL RS232 Serial Output Circuit Board.
C. Typical wiring schematic of the OPTIONAL RS485 Serial Output Circuit Board.

19
DRAWING NO. 4A
REGAL Series 3000 Gas Detector (Chlorine or Sulfur Dioxide)
Typical Installation - 1 Sensor
GAS DETECTOR
DRAWING NO. 4B
REGAL Series 3000 Gas Detector (Chlorine, Sulfur Dioxide or Chlorine and Sulfur Dioxide)
Typical Installation - 2 Sensors
GAS DETECTOR

20
DRAWING NO. 5
REGAL Series 3000 Gas Detector (Chlorine and Sulfur Dioxide)
Faceplates
GAS DETECTOR GAS
DETECTOR
Gas Detector — 1 Sensor Gas Detector — 2 Sensors
DRAWING NO. 6
Wiring Diagram
Remote alarm light and Chlorine room exhaust fan connections showing the exhaust fan
connected to danger relay RL1 and the alarm light connected to warning relay RL4
Wiring required for all connections
Wiring required if exhaust fan current
draw is less than 10 amps
Wiring required if exhaust fan current
draw is greater than 10 amps
LEGEND DEFINITIONS
EF = Exhaust Fan (BY OTHERS)
RL1 = DANGER Relay Terminal - Series 3000
RL4 = WARNING Relay Terminal - Series 3000
LT1 = External Alarm Light/Horn, etc. (BY OTHERS)
R1 = Exhaust Fan Control Relay
(BY OTHERS – Contact rating MUST be sufficient
to operate fan)
S1 = Exhaust Fan On/Off Switch (BY OTHERS)