Sentry SBC Instruction manual
Original Instructions
Installation, Operation
&Maintenance Manual
Sentry SBC Controller
Sampler Controllers
S-AS-IOM-00409-3 11-20
Keep for future
reference.
2 Original Instructions Sentry Equipment Corp
Do not install, maintain, or operate this equipment without reading, understanding, and following the
appropriate Sentry Equipment Corp instructions. Otherwise, injury, damage, or both may result.
Copyright
© 2020 by Sentry Equipment Corp. All rights reserved. All product and company names are property of their respective
owners. This document contains proprietary information. No part of this document may be photocopied or reproduced
without the prior written consent of Sentry Equipment Corp.
Limit of Liability
Sentry Equipment Corp, its employees, agents, and the authors and contributors to this document specically disclaim
all liabilities and warranties, express or implied (including warranties of merchantability and tness for a particular
purpose), for the accuracy, currency, completeness, and/or reliability of the information contained herein and/or for the
tness for any particular use and/or for the performance of any material and/or equipment selected in whole or part
with the user of/or in reliance upon information contained herein. Selection of materials and/or equipment is at the
sole risk of the user of this publication.
Note
The information contained in this document is subject to change without notice.
Sentry SBC Controller Original Instructions 3
Table of Contents
Safety Information .........................................4
General Safety Precautions .................................5
General Description ........................................6
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Receiving............................................................6
Installation ..........................................................7
Inputs ...............................................................7
Outputs .............................................................8
Operation..................................................8
Quick Start ..........................................................8
Using the Controller Keys ............................................8
Starting and Operating the Controller ................................10
Modes of Operation .................................................10
Controller Options ...................................................11
Maintenance Functions ..............................................13
Alarm Function ......................................................15
Purge Function ......................................................15
Stopping the controller ..............................................15
MODBUS Communications...........................................16
Standard Warranty .........................................17
Customer Support..........................................17
Appendix A: Sampler Models A, L, RX, MG-Air ................18
Appendix B: Other Samplers ................................20
4 Original Instructions Sentry Equipment Corp
Safety Information
Please read the entire manual before attempting to unpack, set up, or operate this product. Pay careful attention to all
Warnings, Cautions, and Notes. Failure to do so could result in serious personal injury and/or equipment damage.
Use of Hazard Information
If multiple hazards exist, the signal word corresponding to the greatest hazard shall be used.
Denitions
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION, used with the safety alert symbol, indicates a
hazardous situation which, if not avoided, could result in
minor or moderate injury.
NOTICE is used to address practices not related to personal
injury.
ÂNOTE
Information that requires special emphasis.
ÂTIP
Alternate techniques or clarifying information.
SHALL:
This word is understood to be mandatory.
SHOULD:
This word is understood to be advisory.
Sentry SBC Controller Original Instructions 5
General Safety Precautions
Product Selection, Installation, and Use
Improper selection, installation, or use can cause personal injury or property damage. It is solely the responsibility of users,
through their own analysis and testing, to select products suitable for their specic application requirements, ensure they are
properly maintained, and limit their use to their intended purpose.
Follow proper local, state, and federal regulations for proper installation and operational requirements.
Always use caution and common sense when working with any chemical. Read the product label and Material Safety Data
Sheets (MSDS) carefully and follow the instructions exactly.
Potential Equipment Hazards
Hot surfaces! This equipment may have very hot surfaces. If an operator contacts a hot surface, injury may occur. Use
protective clothing to prevent injury. If other equipment comes in contact with a hot surface, damage to the equipment may
occur. Ensure the area around this equipment is kept clear to prevent damage from occurring.
High pressures! This equipment may contain uids at very high pressures. Prior to installing, removing or maintaining this
equipment, ensure that the equipment is isolated from all connecting piping, the equipment is depressurized, the contents
have been drained, and the equipment is cool.
Moving parts! This equipment may contain moving parts. All drive guards and doors must be secured in place when this
machine is being operated.
6 Original Instructions Sentry Equipment Corp
General Description
ÂNOTE
Information provided in this manual covers all standard features of the Model SBC. Certain features do not apply to all
applications. The software displays the options that apply to your application.
The Sentry® SBC controller is a dedicated logic control system capable of controlling many automatic samplers in the
Sentry product line including liquid, slurry, and bulk solids samplers.
Menus allow quick access
to all system parameters
and information
LCD screen provides
constant information
on system status
Tactile feedback
membrane switches
for operator inputs
Controller features
Adjustable timer setpoints for all sampler models
Standard modes of operation include Batch, Delay Start, and Flow Proportional sampling
Ability to control an indexing cabinet with a jar sensor in conjuction with your sampler
Quick Start screen with step-by-step instructions for startup
Description of the sequence of operation for the programmed sampler
Current cycle counter to track the number of samples taken
PLC heaters are available
General Specications
Operating temperature: 0°C to +50°C
Relative humidity: 5 to 95% non-condensing
Installation
Receiving
Examine the crate and all contents for any shipping damage immediately after receipt.
Take pictures of any suspected damage.
Report damages to the delivery company at once. This is the responsibility of the consignee.
Sentry SBC Controller Original Instructions 7
Installation
Installation should be performed by qualied personnel in accordance with state/provincial and local codes and
procedures.
Mount the controller in a location that is easily accessible and within view of the sampler.
Mount the controller in a vibration-free location and have a qualied electrician wire the controller to the electrical
supply.
Surge suppression and ltering is recommended but not required.
Hard wire the controller to instrument-quality power using appropriate certied conduit, ttings, and wiring or
cable.
Use a suitable external over-current protection device, such as a fuse or circuit breaker (15 A), and disconnect device.
The over-current protection and disconnect devices shall be installed on both the hot (L) and neutral (N) leads.
The disconnect device shall be located near the equipment and marked with appropriate ON(|) OFF(O) markings as
specied by local codes.
When penetrating the controller enclosure, use tubes and ttings that maintain the environmental rating of the
enclosure.
Inputs
ÂNOTE
Inputs I3 through I7 are located on the Index Cabinet. Inputs H1 through H4 and A1 are eld-mounted devices. The signals are
processed in the Sentry SBC Controller.
I1. REMOTE ENABLE: External contact from customer which, when open, prohibits all operation of the sampler. If
not used, leave terminals TB2 1 and 2 wired together.
I2. REMOTE START: External contact from customer, using terminals TB2 3 and 4, which initiates sampling when in
REMOTE mode.
I3. SAMPLER PROX 1: Proximity sensor input. Used for control of MG and SA/E samplers.
I4. SAMPLER PROX 2 or IC Jar Sensor: Secondary proximity sensor input or proximity sensor used to sense level of
jar ll in the Indexing Cabinet.
I5. IC DOOR: Proximity sensor input conrming position of door on the Indexing Cabinet. Operation inhibited if
door is open.
I6. IC Carousel: Proximity sensor input conrming the position of the carousel of the Indexing Cabinet.
I7. IC Manual Pushbutton: Manual advance pushbutton for the Indexing Cabinet.
I8. Delay Start: Contact closure triggers a time delay. After delay timer expires, sampling will start.
H1. High Speed Counter: Flow counter input used for ow based sampling (10 kHz max frequrency; 100 µs min
pulse resolution).
H2. Digital or COUNTER Input: Extra digital input or high speed counter input available for future control
enhancements.
H3. Digital or COUNTER Input: Extra digital input or high speed counter input available for future control
enhancements.
H4. Product Backup Sensor: Proximity sensor input used for sample backup indication.
A1. 4-20 mA INPUT: Flow meter output used for ow based proportional sampling.
8 Original Instructions Sentry Equipment Corp
Outputs
ÂNOTE
If others provide control, it should follow the minimum requirements of the operating logic outlined in this section
Controller outputs vary by the sampler controlled. Refer to the chart below or the electrical wiring diagram (EWD) to
determine output usage.
Sampler R1 R2 R3 R4 R5 R6
A, MG-Air Unused Sample
Sol IC Full IC Motor Alarm Sampler
Running
B1 Direction
Relay IC Full Motor " " "
GE IC Full Unused Motor " " "
ISOLOK Air Eject Sol Sample
Sol IC Full " " "
Iso-Park Sol 2 Sol 1 IC Full " " "
MG Elec IC Full Unused Motor " " "
PR Purge Sol Sample
Sol IC Full " " "
R Solenoid IC Full Motor " " "
RB, D2 Solenoid IC Full Motor " " "
RX Purge Sol Sample
Sol IC Full " " "
RPG Extend Sol Rotate Sol IC Full " " "
SA/A, GA Solenoid Unused IC Full " " "
SA/E IC Full Unused Motor " " "
Operation
Quick Start
The rst time power is applied, the controller defaults to Quick Start. Quick Start leads the operator through the
controller set-up procedure step-by-step.
To access Quick Start on subsequent power-ups, press the Service key and select Quick Start.
Using the Controller Keys
System Keys
1. Soft Keys: The arrow keys on either side of the display correspond to keys programmed on the screen. The rim
surrounding the soft key shown on the display will be lled when the option is selected.
2. ESC: Returns to previous screen; ends editing session without accepting new value.
3. Arrow Keys: The up, down, right and left arrow keys located directly below the display are used to navigate menu
selections and change editable values.
4. ENTER: Accepts new values; selects menu options; enters editing mode.
5. Numbers: In editing mode, all of the function keys can be used to enter numbers, which are shown in gray on the
upper right hand corners of the keys
Sentry SBC Controller Original Instructions 9
Command Keys
1. AUTO: Places the controller in AUTO mode. This mode allows local operation of the controller.
2. Remote: Allows remote operation of the controller. Sampling starts when a contact from an external source is
closed. Continuous sampling occurs for as long as the contact is closed. Momentarily closing this contact will start
a single sample.
3. OFF: Takes the sampler out of REMOTE or AUTO mode; will reset the Batch counter.
4. Purge: If sampler has a purge/air eject option, this key manually operates the solenoid to purge the unit.
5. GRAB: Allows the operator to immediately collect a sample. Sampler must be in the Cycle/Retracted portion of the
sampling cycle or in the OFF state.
Menu Keys
1. MAIN: Main operating screen displays sampler position, current timer value, current mode, and Batch and IC count.
2. Setpoint: Lists all program setpoints.
3. Option: Menu of the available program options and routing to pertinent screens.
4. Service: Menu of service-related options such as I/O Status, Quick Start, Operation Sequence, Default settings, and
Cycle Counter.
5. Alarm: System alarm log.
10 Original Instructions Sentry Equipment Corp
Starting and Operating the Controller
After the sampler and controller are installed, timer setpoints must be veried or changed from the factory preset
values.
1. Press the Setpoint menu button to access the Setpoints menu screen.
2. The Setpoints menu screen lists all the setpoints available for adjustment.
3. Refer to the appropriate appendix for information on the setpoints for your sampler model.
Timers
ÂNOTE
Timers used depend on sampler type. See appendix appropriate to your sampler.
1. Extend or Sample time: Determines the time the sampler is in the process stream (max 600 sec).
2. Retract time: (not applicable to all samplers) Determines the duration the sample probe is retracted, allowing the
sample to be deposited into the sample container (max 600sec).
3. Cycle Time: Determines the time between samples (max 17:59:59).
4. Delay Time: (not applicable to all samplers) Determines the time before purge/air eject occurs (max 600 sec).
5. Purge Time: (not applicable to all samplers) Determines the time purge/air eject is active (max 600 sec).
6. Park Time: (not applicable to all samplers) Determines the time the sampler is in the Park position (max 17:59:59).
Modes of Operation
The controller operates in two modes, AUTO and REMOTE, with the capability to take a GRAB sample in either mode.
AUTO and REMOTE cannot be selected at the same time.
Auto Mode
Auto mode is the default mode of operation.
Press the AUTO key to place the controller in Auto mode.
All operating commands are initiated at the controller panel.
Refer to the appropriate appendix or the Service Menu of the controller for the sequence of operation specic to
your sampler model.
Remote Mode
Press the REMOTE key to place the controller in Remote mode.
Start and stop commands are initiated from a remote control system.
Sampling is started and stopped based on an external contact (Terminals TB2 3, 4).
– When the contact is closed, sampling starts.
– When the contact is removed, sampling stops.
– If contact is removed in the middle of a sampling cycle, the sampler completes the cycle and then stops.
– A momentary closure of the remote contact results in a single sample being taken.
Sentry SBC Controller Original Instructions 11
Grab Sample
Press the GRAB key to take a single manual sample, also known as a grab sample.
A grab sample can be taken any time the sampler is not actively sampling. The current state of the sampler is
displayed on the main screen.
When the grab sample is complete, the cycle timer resumes counting from the point at which it was interrupted.
Controller Options
The Options menu lists all of the options available based on your sampler
model.
Press the OPTION key on the controller to view the Options menu.
Use the small arrow keys to navigate to the desired option, and then
press the Enter key to select the menu item.
Press the ESC key to return to the Options menu.
Status
The STATUS screen is for information only. A lled indicator designates an
option that is currently selected for operation of the controller.
Index Cabinet
The Indexing Cabinet screen displays the current status of the indexing
cabinet (IC) and allows the operator to enable use of the IC, set the number
of jars in the cabinet, and reset the jar counter.
Enable Use of the Indexing Cabinet
– To enable the IC software, press the lower soft key to the left of the
screen.
– The screen changes from “IC OFF”to“IC ON.”
Number of Jars
– The number of jars displayed (# Jars) is equal to the physical number of jars used in the Indexing Cabinet.
– Cur Jar indicates which jar is currently in use.
Reset the Jar Counter
– When all of the jars in the indexing cabinet are full, replace them with empty jars.
– Reset the jar counter by pressing the lower soft key to the right of the screen.
12 Original Instructions Sentry Equipment Corp
Batch
The BATCH option allows the sampler to take a specic number of samples
and then stop. For example, this option could be used to ll a container and
then stop sampling until the container can be replaced.
To enable the BATCH option, press the arrow next to the Enable soft key.
To change the setpoint :
– Press the ENTER key to backlight the value.
– Use the UP and DOWN arrow keys to adjust the value incrementally,
or use the number keys to enter a value.
– When the desired value is displayed, press the ENTER key to accept.
Once a BATCH is complete, sampling will stop. To reset the batch counter, press the arrow next to the RESET soft
key on the above screen or press the OFF key from the Main screen. This action resets the batch counter to zero and
sampling resumes.
Air Eject
This option is available only on specic samplers. Consult with a Sentry sales
representative to see if the air eject option is available for your application.
Air eject allows a shot of air to ow through the sampler after the sample
has been taken. After the sample is taken, the delay timer starts. The delay
allows some time for the majority of the sample to evacuate the sampler.
When the delay expires, the purge solenoid is energized allowing air to ow
through the sample chamber, clearing any residual sample.
4-20 mA Flow Proportional Sampling
The controller has a ow proportional sampling option. With this option,
a 4-20 mA signal from a ow meter is input into the controller. Setpoints
for the sampling time at maximum ow and minimum ow are entered.
These setpoints are used to calculate the PARK timer value. The EXTEND and
RETRACT times are still based on the operator entered setpoints. Based on
the analog input from the ow meter, a sampling rate is determined. This
value is a linear interpolation between the minimum and maximum ow
setpoints entered.
This option is enabled by pressing the arrow next to the ENABLE soft key. The minimum and maximum ow setpoints
are entered using the ENTER, UP and DOWN arrow keys, and ESC key as detailed in the setpoint section of this manual.
A dashed box appears around the active selection. The RIGHT and LEFT arrow keys can be used to move between elds.
For example:
The operator sets the max ow time to 10 seconds and the min ow time to 30 seconds. He enables the option by
pressing the soft key. The controller is placed in AUTO using the selector switch. The ow input signal is at 12 mA,
about half of full scale. The controller calculates the park time to be 20 seconds. The sampler will extend and retract
at the set values. It will Park for 20 seconds and then start the cycle over again. If the ow input changes to 4.1 mA,
the extend and retract values stay the same, but the park value is adjusted to 30 seconds. If the input falls below
4.0 mA, timer operation is suspended. As soon as the input goes above 4.0 mA, the timing will resume, picking up
where it left o.
Sentry SBC Controller Original Instructions 13
Flow Counter
The controller will accept a square wave input from a ow counter
and sample after X number of pulses. X is determined by the ow
counter setpoint. The square wave must have an ON time of at least 200
microseconds for the controller to recognize the input.
The Flow Counter option is enabled using the Enable soft key. Setpoint
value is entered using the ENTER, UP and DOWN arrow keys, and ESC key, as
detailed in the Setpoint section.
This option is no longer a time based sampling cycle. The time between samples is determined by the number of
counts from the ow counter input. Extend and Retract times are based on operator setpoints.
Delay Start
The controller will accept a dry contact input from a plant device, such as
a pump. If the Delay Start function is selected, sampling will wait until the
contact is closed. Then after the time delay entered has expired, sampling
will start.
This feature is useful if you have a pump that cycles o and on. You only
want to sample when the pump is on and at full ow. Connect the dry
contact, enter the desired time delay, place the controller in AUTO and
sampling will take place only when the pump conditions are met.
The Delay Start option is enabled using the Enable soft key. Setpoint value is entered using the ENTER, UP and DOWN
arrow keys, and ESC key, as detailed in the Setpoint section.
Maintenance Functions
The Maintenance menu provides access to various information options for
your controller.
Press the SERVICE key on the controller to view the Maintenance menu.
Use the small arrow keys to navigate to the desired option, and then
press the Enter key to select the menu item.
Press the ESC key to return to the Maintenance menu.
14 Original Instructions Sentry Equipment Corp
IO Status
The IO Status screen allows you to see the current state of inputs and
outputs to the controller
All of the digital inputs (I) and the digital outputs (Q) are represented by
indicators. If the indicator is lled in, the signal is present. A1 represents the
raw unscaled value of the analog input. HSC1 represents the current value
of the high speed counter. This screen is very useful during the trouble
shooting phase of startup to help verify inputs and outputs.
Quick Start
The Quick Start feature is an easy way to get your sampler and controller up
and running quickly.
The Quick Start will guide you through each step required for simple
operation of the sampler. Connections need to be veried using
engineering drawings for your sampler. Important setpoints will be
requested. Once the quick start is complete, you should be able to start
Local (AUTO) operation of your sampler manually or in continuous mode.
Operation Sequence
The Sequence of Operation is a description of the typical operation for your
specic sampler. It is for information only.
Pressing the soft key across from NEXT on the screen will advance the
operator through each step in the sequence of operation for the sampler.
The soft key across from RESTART will start the sequence description over
from the beginning.
Default
The DEFAULT option allows the user to go back to the original factory
settings for options and setpoints.
When you press the soft key next to YES, the setpoints will be set to the
factory defaults and modes will be cleared.
Cycle Counter
The controller has a cycle counter to keep track of the number of samples
taken by the sampler.
The CURRENT counter represents the number of samples taken since the
last reset. This counter is reset by pressing the arrow key next to the RESET
soft key. This counter is limited to 65,536.
The ETERNAL counter cannot be reset and displays the number of samples
ever taken by the sampler. This counter is limited to 4,294,967,296.
Sentry SBC Controller Original Instructions 15
Contact Us
If a problem should arise with the sampler or controller, please contact
Sentry at the number listed on the screen as shown below.
Conguration
This selection is password protected and is for factory use only.
Software
The Software screen lists the revisions for the loaded software.
Alarm Function
The Alarms Screen records all alarms with a time and date stamp along with
a description of the alarm.
Press the soft key next to the screen arrow (top Left) twice to get the alarm
function keys. At this point, the function keys will no longer perform the
function described on the keys; they have been switched over to the Alarm
Functions.
Pressing F1 (AUTO) will acknowledge the alarm: F2 (Remote) will clear the
alarm. If multiple alarms are active, F3 (OFF) will acknowledge all of the
alarms and F4 (Purge) will clear all of the alarms. Acknowledging the alarm
maintains the record on the alarm screen. Clearing an alarm removes it from
the alarm screen.
If the condition causing the alarm is still present, acknowledging or clearing
the alarm will not aect the condition and the program will continue to
react to the alarm state.
Purge Function
Some samplers have a purge option. The Purge command key on the controller allows manual activation of the Purge
solenoid. The solenoid remains energized and air ows through the sampler for as long as the Purge key is held down.
Stopping the controller
To stop the program and return the sample probe to the home position, press the OFF key. The sampler will nish its
current cycle and then return to the home position.
16 Original Instructions Sentry Equipment Corp
MODBUS Communications
The Sentry SBC Controller is designed to communicate via MODBUS. It is set to operate as a slave-only and the address
range is 1-247. See the chart below for proper addressing.
SBC Modbus Mapping
Utilize port MJ2 for Modbus communications!
Slave address range 1 - 247
Function Register Description Read / Write Units Data Size Data Type
1 3007 Air Eject Read/write 1 Bit
3020 Batch Enable Read/write 1 Bit
6071 Remote Enable Read/write 1 Bit
6072 Remote Start Read/write 1 Bit
2 15001 Auto (start) Read Only 1 Bit
15003 O (stop) Read Only 1 Bit
3 43180 IC Jar # (current
jar #)
Read Only 32 Int_32
43501 Sample Seconds Read/write Sec 16 Int_16
43502 Delay Read/write Sec 16 Int_16
43503 Purge Seconds Read/write Sec 16 Int_16
43504 Cycle Seconds Read/write Sec 16 Int_16
43505 Cycle Minutes Read/write Min 16 Int_16
43506 Cycle Hours Read/write Hrs 16 Int_16
43507 Batch Setpoint Read/write 16 Int_16
43512 Purge Delay Read/write Sec 16 Int_16
44100 Modbus Bit
Number Status
Read Only 16 Int_16
44101 Batch Complete Read Only 16 Int_16 (Bit 0)
44102 Batch Reset Read Only 16 Int_16 (Bit 0)
44103 IC Full Read Only 16 Int_16 (Bit 0)
44104 IC Door Open Read Only 16 Int_16 (Bit 0)
Modbus Wiring
Pin MJ2 Pins
Signal Direction
2RX- / TX- IN / OUT
1RX+ / TX+ IN / OUT
Sentry SBC Controller Original Instructions 17
Modbus Communication
Function Setting
Port MJ2
Baud Rate 9600
Parity None
Data Bits 8
Stop Bits 1
Handshake MD Half
Protocol M RTU
Mode RS-485 (Utilizes Data Oset of 1)
Standard Warranty
Sentry Equipment Corp (“Seller”) warrants products manufactured by it and supplied hereunder (“Products”) to be free
from defects in workmanship and, to the extent materials are selected by Seller, to be free from defects in materials, in
each case for a period as dened in the table below:
Product Line Product Category Warranty Period
Sentry® 1. Automatic Sampling
2. Corrosion Monitoring
3. Manual Sampling
4. Sample Conditioning
5. Sampling & Analysis Systems
6. Replacement Parts (without expiration dates)
Eighteen months from date of shipment
or twelve months from startup, whichever
occurs rst
Waters Equipment 1. Sampling & Analysis Systems
2. Replacement Parts (without expiration dates)
Twelve months from date of shipment
To view the full warranty, go to
www.sentry-equip.com/warranty.
18 Original Instructions Sentry Equipment Corp
Customer Support
With proven sampling expertise since 1924, Sentry products and services provide business operations the critical
insights to optimize process control and product quality. We deliver true representative sampling and analysis
techniques to customers around the globe, empowering them to accurately monitor and measure processes for
improved production efficiency, output, and safety. Standing behind our commitments, we are determined to tackle
any application, anywhere.
We know that running an efficient operation isn’t easy. It requires thorough, careful analysis of controlled, real-
time data achieved through reliable, accurate, and repeatable process monitoring, and measuring. By eectively
conditioning, sampling, and measuring gas, liquid, slurry, powder, solids, steam, or water within their production
environments, our customers obtain the critical insights they need to control and optimize their processes.
Yet, controlling your processes also means reliable customer support throughout the life cycle of your equipment.
Customer Service—General information, warranty claims, order management.
Installation Service—For systems that require specialized expertise upon installation.
Technical Support—Troubleshooting, training, and technical manuals.
Field Service & Retrots—When a problem needs immediate attention.
Replacements Parts & Consumables—Order your replacement parts and consumables.
Sentry ProShield Services—Select from four ProShield Guardian service plans providing dierent levels of support to
protect your large system investments with regularly scheduled maintenance.
To learn more, go to
www.sentry-equip.com/support.
Appendix A
Sampler Models A, L, RX, MG-Air
Sequence of Operations
1. Energize solenoid
– Model A: air cylinder opens slide gate
– Models L and RX: air cylinder extends sampler
– Model MG-Air: sample tube rotates up
2. Start sample timer
3. Sample timer expires
4. De-energize solenoid
– Model A: slide gate closes
– Models L and RX: air cylinder retracts sampler
– Model MG-Air: sample tube rotates down
5. Start cycle timer
6. Cycle timer expires
Sentry SBC Controller Original Instructions 19
7. Repeat sequence
Setpoints
To select a setpoint for changing, press the ENTER key. A selection will be
backlit.
Use the small UP and DOWN arrow keys below the display to move
between selections.
Once the desired selection is backlit, press ENTER again. Now only the
value is backlit.
Use the number keys (light gray number in upper right hand corner of
function keys) to enter a value or use the UP and DOWN arrow keys to
adjust the current value. When desired value is entered, press ENTER key.
The entire selection is again backlit.
Select another setpoint using the UP and DOWN arrow keys or press ESC
to exit the modication mode.
Once you press ESC, no selection will be backlit.
Press the MAIN key to go to the Main operations screen.
The Main operations screen monitors the sampler operation. No setpoints or options may be changed from this
screen. This screen shows the current state of the sampler with a graphic representation. It also shows the time
remaining for that portion of the sampling cycle. The small indicators at the bottom of the screen conrm the
current mode selected (lled indicates selected). They are:
– AUTO – auto mode
– REM – remote mode
– MAN – manual grab sample
– BAT – batch mode enabled
– IC – Index Cabinet enabled
When BATCH mode is enabled, the number of samples taken for this batch is displayed next to the BATCH indicator.
When the IC is active, the current jar being lled in the IC is displayed next to the IC indicator. When the IC cabinet is
full, the IC indicator ashes.
Press the AUTO key to start sampling. The sampler will immediately extend the plunger into the process stream and
start the sampling cycle. If this does not occur, check to see if the REMOTE ENABLE input is present. Without this
input, the sampler will not function under any circumstances.
20 Original Instructions Sentry Equipment Corp
Appendix B:
Other Samplers
Sequence of Operations
Model B1
1. Start motor in purge direction, start purge timer
2. Purge time expires
3. Stop motor, start delay timer
4. Delay time expires
5. Start motor in sample direction, start sample timer
6. Sample time expires
7. Stop motor, start cycle timer
8. Cycle time expires
9. Go to step 1
Model D2
1. Energize solenoid, air cylinder rotates sample tube up, motor starts turning the auger, start sample timer
2. Sample time expires
3. Solenoid de-energized, air cylinder rotates sample tube down, start auger purge timer
4. Auger purge time expires
5. Stop motor, start cycle timer
6. Cycle time expires
7. Go to step 1
Model GA
1. Energize solenoid, air cylinder moves head across the ow to location 2, start cycle timer
2. Cycle time expires
3. Solenoid de-energized, air cylinder moves head across the ow to location 1, start cycle timer
4. Cycle time expires
5. Go to step 1
Model ISOLOK®
1. Energize solenoid, air cylinder extends sampler, start sample timer
2. Sample time expires
3. Solenoid de-energized, air cylinder retracts sampler, start cycle timer
4. Cycle time expires
5. Go to step 1
Table of contents
Other Sentry Controllers manuals
