Sentry Sample Sequencer 6 - Appendix A: Recommended Piping; Appendix B: Using a Sequencer with Hach Series 5000 Analyzer

Sentry Sample Sequencer 6 Controller 33
Appendix A: Recommended Piping
Maintain proper sample conditioning and ow control in order to obtain representative samples. The Electric Power
Research Institute (EPRI) guidelines for representative sampling recommend maintaining constant and continuous
sample ow in sample lines. In addition, it is recommended that the sample be cooled to a temperature of 77 °F (25 °C)
prior to analysis.
 NOTE
Some analyzers may recommend a dierent sample temperature be used to accelerate the analysis process.
Appropriate sample coolers or heaters may be required. Consult the pressure and temperature specications for
your specic analyzer and sampling system. Figure A-1 shows the recommended sample conditioning piping and
instrumentation diagram (P&ID) when switching streams with the Sample Sequencer 6.
Figure A-1. Recommended Sample Conditioning
SENTRY MANIFOLD SWITCHING VALVE
ANALYZER
SAMPLE SEQUENCER
1/8" O.D. TUBE RECOMMENDED, MINIMIZE THIS SAMPLE LINE
LENGTH TO OBTAIN OPTIMUM TIME RESPONSE OF ANALYSIS.
* = OPTIONAL ITEMS DEPENDING
UPON APPLICATION
SEE ACCESSORIES TO ORDER
FICV, STRAINER, BPR/RV
LEGEND
DRAIN
FICV =
FI =
BPRV/RV =
PRV =
FLOW INDICATOR
W/CONROL VALVE
FLOW INDICATOR
BACK PRESSURE
REGULATOR/RELIEF
VALVE
PRESSURE REDUCING
VALVE, i.e., SENTRY
VREL OR NEEDLE
SAMPLE SOURCE 1
*ISOLATION VALVE
*PRIMARY COOLER
*PRV
TOTAL FLOW
50 MESH
*STRAINER
*SECONDARY COOLER
BPR/RV
20 PSIG
DRAIN OR
RECOVERY
ANALYZER FLOW
RECOVERY
BPR/RV
DRAIN OR
20 PSIG
*SECONDARY COOLER
*STRAINER
50 MESH
ANALYZER FLOW
TOTAL FLOW
*PRV
SAMPLE SOURCE 2
*ISOLATION VALVE
*PRIMARY COOLER
RECOVERY
BPR/RV
DRAIN OR
20 PSIG
*SECONDARY COOLER
*STRAINER
50 MESH
ANALYZER FLOW
TOTAL FLOW
*PRV
SAMPLE SOURCE 3
*ISOLATION VALVE
*PRIMARY COOLER
DRAIN OR
RECOVERY
ANALYZER FLOW
*SECONDARY COOLER
50 MESH
*STRAINER
*PRIMARY COOLER
*ISOLATION VALVE
SAMPLE SOURCE 4
*PRV
TOTAL FLOW
20 PSIG
BPR/RV
SENTRY
HEADER
SENTRY
HEADER
SENTRY
HEADER
SENTRY
HEADER
VALVE
& COOLERS
IF
FICV FICV
IF
FICV
IF
FICV
IF
Appendix B: Typical Batch Type Analyzer Wiring
The Sample Sequencer 6 may operate with a Hach Series 5000 analyzer. The Series 5000 instruments operate in Batch-
mode style and require the appropriate conguration for use with the Sample Sequencer 6. Hach 5000 analyzers have
special features that provide a contact closure at the end of the batch. This is called the “Mark End of Measurement”
contact closure. The contact closure causes the sample sequencer to advance to the next sample point. See “Batch
Mode” on page 27 for more information.
Figure B-1 illustrates how to connect the Sample Sequencer 6 to a Hach Series 5000 analyzer. The Hach 5000 analyzer
must be congured properly to operate with the sequencer. The analyzer must be programmed to use relay #3 and
relay #4 for System Alarm and End-of-Measurement contact closure indications, respectively. Consult the Hach analyzer
manual for information about conguring the System Alarm to relay 3. The following procedure describes how to