esponsible for its content.
SAMPLE SENTRY









SAMPLE SENTRY
®


SAMPLE CONDITIONING
MODULES




Installation, Operation and
Maintenance Manual








SPD 1.1.9
Rev. 2
02/04



Web: www.sentry-equip.com
e-mail: sales@sentry-equip.com Sample Sentry®
SPD 1.1.9 Rev. 2






REVISION HISTORY

Rev. ID

Date

Notes
0

10/00
This is the initial release of the Sample Sentry
®
manual SPD
1.1.9. The previous manual is obsolete. Significant changes
have been made along with reformatting.

1

11/01
Page 27. 4-04771A and B changed to 6-02352F and E
2

02/04
Replaced old Warranty with new Warranty SPD 4006 Rev 0.


Sentry Equipment Corp. 856 E. Armour Road P.O. Box 127 Oconomowoc, WI 53066 262/567-7256 FAX: 262/567-4523
Web: www.sentry-equip. com e-mail: sales@sentry-equip.com
ii Sample Sentry®
SPD 1.1.9 Rev. 2




TABLE OF CONTENTS

Page
Technical Specifications

1-2



Quick Start Guide

3



Principle of Operation

4

Automatic Mode

7

Manual Mode

8

Blow down

9

Alarms

9



Setup and Calibration

10

Sampling System

10

Controller Setup & Calibration

11

Automatic Startup Switch

14

Flow Meter Setup

15

Pressure Reduction Valve Setup

16

Electrical

17



Operation

18

Indicators

18

Controls

19

Valve Control

20

Automatic Operation

20

Manual Operation

21



Maintenance

22

Trouble Shooting Guide

22

Maintenance Report

24



List of Components

25



Warranty

27



Appendix
29

Good Sampling Practices

29
Communications

31
Component
Descriptions

32

High Pressure Solenoid Valve
Maintenance



37



Drawings
40

Sentry Equipment Corp. 856 E. Armour Road P.O. Box 127 Oconomowoc, WI 53066 262/567-7256 FAX: 262/567-4523
Web: www.sentry-equip. com e-mail: sales@sentry-equip.com
iii Sample Sentry®
SPD 1.1.9 Rev. 2




TECHNICAL SPECIFICATIONS

Sample Sentry
®
Controller
Power Requirements..... 115 or 230 VAC, 50/60 Hz, VA=150
Sample Conditions


Max Flow Rate 0 to 4,000 cc/min

Sample Inlet Temp..........
32 to 1000
°F (0 to 532°C)
Ambient
Conditions.....
32 to 140
°F (0 to 60°C)

Analyzer Sample Pressure... Held constant at approximately 20 psig, depending upon grab
sample flow rate
Flow
Accuracy
+ 5% of flow reading when BPR/RV is controlling
Displays

Upper... 4 digit, 0.6" High, green, 7-segment LED displays flow rate
(cc/min)

Lower... 3 digit, 0.6" high, green, LED displays final sample, cooling
water-out and optional temperature (
°F or °C) and reduced sample
pressure (psig)
Indicators....................... Red LEDs light to indicate alarms, displayed parameters and
solenoid valve position
Keypad........................... Six tactile feedback membrane switches for sample valve, blow
down valve, display, auto/manual, alarm reset and reset.
Control Set points & Alarms


Controlled sample flow rate. 800 to 3,580 cc/min, switch selectable

Startup Pressure.
0-1800 psig (POT adjustable) (0-124 bar)

Blow down Duration............ 0, 2, 4, or 6 minutes, switch selectable
Temperature
Alarm..............
120 or 140
°F (49 or 60°C), switch selectable

Pressure Alarm Setpoint......

220 psig (15 bar)
Valve Control Single speed proportional control. 7 psi deadband
Measurements and Displays.. Final sample temperature


Cooling water outlet temperature

Sample flow rate

Conditioned (reduced) sample pressure

Optional third temperature
Serial Communications RS485 protocol at 2400 baud, 16 stations per serial port with
SAMPSEN


Pressure Measurement
Accuracy.. +1% of full scale
Overpressure Proof: 250% of FS
Burst: 750% of FS
Range... Inlet: 0 to 3000 psig
Sample: 0 to 300 psig
Process Connection.. ¼ NPT
Operating Temperature -40 to 250
°F

Motor Data
Power 110Vac
Torque... 9 in-lbs at 50 rpm
Temperature Measurement
Type.. 100
RTD
Sentry Equipment Corp. 856 E. Armour Road P.O. Box 127 Oconomowoc, WI 53066 262/567-7256 FAX: 262/567-4523
Web: www.sentry-equip. com e-mail: sales@sentry-equip.com
1 Sample Sentry®
SPD 1.1.9 Rev. 2




Accuracy... +1
°F
Range 0 to 300
°F

Design Goals
Obtain representative sample
Pressure and temperature alarms on high conditions
Adjustable alarm levels
Automatic sample flow control
Motorized VREL
®
or needle valve
Adjustable flow set-point
Maintains constant flow in sample lines
Automatic sample startup
Automatic startup as inlet pressure rises
Auto shut off when sample flow is below set-point
Pressure and temperature alarms stop sample flow
Automatic sample blow down
At each restart
Adjustable pressure setting
Adjustable blow down duration
Network communications

are provided for remote display, control and data acquisition

Modes and Switches

Controller Modes
Manual

Start

Run

Stop
Membrane Switch Buttons
Alarm/Reset

Display

Sample

Blow Down

Auto/Manual

Reset/Start
Throughout the text of the manual an italicized word will represent one of the modes of the
Sample Sentry
®
. A word in bold implies the use of a button on the membrane switch.









NOTE: Sentry reserves the right to change any specifications without notice.
Sentry Equipment Corp. 856 E. Armour Road P.O. Box 127 Oconomowoc, WI 53066 262/567-7256 FAX: 262/567-4523
Web: www.sentry-equip. com e-mail: sales@sentry-equip.com
2 Sample Sentry®
SPD 1.1.9 Rev. 2




QUICK START GUIDE

The following are a set of steps used to start up a Sample Sentry
®
panel. The guide should be used in
conjunction with the remainder of the manual to build a full understanding of Sample Sentry
®
.

Sample tubing - all field installed sample tubing must be blown out and hydrostatically tested before
initializing sample to the panel. A guide for choosing sample tube sizes is included in appendix A.
Sentry will assist in sizing and suggestions for sample tubing.

Cooling -Always ensure cooling water has been introduced to the panel. Make sure all the sample
cooler valves are open.

Initial power up - introduce power to the panel before any sample flow is initiated. All Sample Sentry
®

displays will light up. Flow rate will be zero and the current temperature will show in the lower display.

Starting Sample Sentry
®
- when power is introduced to Sample Sentry
®
it will begin in automatic mode
and perform these steps. Do not introduce sample pressure to the panel. Leave the sample isolation
valve closed.

o
Sample Sentry
®
checks for complete closure of the pressure reduction valve (PRV). If the
valve is not closed the controller will close it automatically.
o
Once the PRV is closed the controller will open the sample valve. The PRV will open
attempting to introduce flow. The isolation valve is still closed; no sample flow should be
introduced to the panel.
o
Sample Sentry
®
will continue to open, until the valve reaches fully open. The sample valve
will close and the PRV will begin to close. The stop LED will light.
o
When the PRV fully closes the controller will wait in start mode. The start LED will be lit.
o
Each step will occur in this sequence any time a Sample Sentry
®
is powered down or reset.
Shutting off the isolation valve and running the controller through these steps is a good way
to periodically test correct operation. Please see the troubleshooting guide at the end of the
manual if the sequence of operations didnt complete.

Sample Sentry
®
will wait in start mode until it sees sample pressure. Open the isolation valve to
introduce sample. Sample Sentry
®
begins the blow down sequence by opening the blow down valve
and starting to open the PRV. Preprogrammed blow down time counts down toward zero. The
PRV will either open all the way or stop when the sample temperature reaches 110
°F.

When the blow down time reaches zero. The blow down valve and the PRV will close.

Sample Sentry
®
senses the PRV is closed and opens the sample valve. The controller turns the PRV
open until it reaches the preset flow set point.
Sentry Equipment Corp. 856 E. Armour Road P.O. Box 127 Oconomowoc, WI 53066 262/567-7256 FAX: 262/567-4523
Web: www.sentry-equip. com e-mail: sales@sentry-equip.com
3 Sample Sentry®
SPD 1.1.9 Rev. 2




PRINCIPLE OF OPERATION

Sample Sentry
®
is designed to automate the sampling process. Todays power plants ramp pressure and
come on and offline often. Changing plant conditions alter sample temperature, flow rate, and pressure.
Sample Sentry
®
measures sample conditions and delivers a constant flow rate, temperature, and reduced
pressure. Sample Sentry
®
is comprised of sensors, solenoid valves, and a controller. Sample temperature,
cooling water outlet temperature, sample flow rate and conditioned sample pressure are continuously
monitored. The controller uses sensor data to adjust flow rate and control solenoid valve position.
Normal operating characteristics are displayed. Abnormal conditions trigger visual alarms.

PRV

Figure 1: Typical piping and instrumentation diagram (P&ID) of a Sample Sentry
®
.

Sentry Equipment Corp. 856 E.