Appendix A: Recommended Piping; Appendix B: Using A Sequencer With Hach Series 5000 Analyzer - Sentry Sample Sequencer 6 Installation, Operation & Maintenance Manual

Appendix A: Recommended Piping

Maintain proper sample conditioning and flow control in order to obtain representative samples. The Electric Power
Research Institute (EPRI) guidelines for representative sampling recommend maintaining constant and continuous
sample flow 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 different sample temperature be used to accelerate the analysis process .
Appropriate sample coolers or heaters may be required. Consult the pressure and temperature specifications for
your specific 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
SAMPLE SOURCE 1
*ISOLATION VALVE
*PRIMARY COOLER
*PRV
TOTAL FLOW
F I
50 MESH
*STRAINER
*SECONDARY COOLER
SENTRY
BPR/RV
20 PSIG
ANALYZER FLOW
FICV
DRAIN OR
RECOVERY
HEADER
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 configuration 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 configured 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 configuring the System Alarm to relay 3. The following procedure describes how to
Sentry Sample Sequencer 6 Controller
SAMPLE SOURCE 2
*ISOLATION VALVE
*PRIMARY COOLER
*PRV
TOTAL FLOW
F I
50 MESH
*STRAINER
*SECONDARY COOLER
SENTRY
BPR/RV
20 PSIG
ANALYZER FLOW
FICV
DRAIN OR
RECOVERY
HEADER
SENTRY MANIFOLD SWITCHING VALVE
DRAIN
SAMPLE SOURCE 3
*ISOLATION VALVE
*PRIMARY COOLER
*PRV
TOTAL FLOW
F I
50 MESH
*STRAINER
*SECONDARY COOLER
SENTRY
BPR/RV
20 PSIG
ANALYZER FLOW
FICV
DRAIN OR
RECOVERY
HEADER
1/8" O.D. TUBE RECOMMENDED, MINIMIZE THIS SAMPLE LINE
LENGTH TO OBTAIN OPTIMUM TIME RESPONSE OF ANALYSIS.
ANALYZER
SAMPLE SOURCE 4
*ISOLATION VALVE
*PRIMARY COOLER
*PRV
TOTAL FLOW
F I
* = OPTIONAL ITEMS DEPENDING
50 MESH
SEE ACCESSORIES TO ORDER
*STRAINER
FICV, STRAINER, BPR/RV
& COOLERS
*SECONDARY COOLER
SENTRY
BPR/RV
20 PSIG
ANALYZER FLOW
FICV
DRAIN OR
RECOVERY
HEADER
LEGEND
FICV = FLOW INDICATOR
W/CONROL VALVE
FI = FLOW INDICATOR
BPRV/RV = BACK PRESSURE
REGULATOR/RELIEF
VALVE
PRV = PRESSURE REDUCING
VALVE, i.e., SENTRY
VREL OR NEEDLE
VALVE
UPON APPLICATION
SAMPLE SEQUENCER
33