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Summary of Contents for VTI Instruments 2008SDH-2AP
- Page 1 MODEL 2008SDH-2AP CARBON DIOXIDE MONITOR Instruction Manual Phone: (209) 754-0707 • FAX (209) 754-0104 • e-mail: vti@val-tronics.com • http://val-tronics.com...
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Page 2: Table Of Contents
VALTRONICS MODEL 2008SDH-2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL 5/22/17 TABLE OF CONTENTS SECTION TITLE PAGE I. INTRODUCTION II. DESCRIPTION A. System B. Power Supply C. Circuit Board Figure 1 - Model D. Gas Cell/Detector Figure 2 - Gas Cell III. INSTALLATION A. -
Page 3: Introduction
INSTRUCTION MANUAL I. INTRODUCTION The Model 2008SDH-2AP is a gas detection system designed to determine the carbon dioxide content of the air for various monitoring applications. It senses and measures carbon dioxide (full-scale ranges are available from 50% to 100%) and provides a linear output of 0- 1VDC and 4-20mA as a function of carbon dioxide concentration. - Page 4 VALTRONICS MODEL 2008SDH-2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL FIGURE 1 (Valtronics Model 2008SDH-2AP) Copyright 2017 VTI-Valtronics Inc.
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Page 5: Gas Cell/Detector
Any carbon dioxide in the gas sample cell selectively absorbs energy reaching the detector. This change in energy is detected, amplified and sent to the signal-processing portion of the system. FIGURE 2 (2008SDH-2AP Gas Cell / Detector) Copyright 2017 VTI-Valtronics Inc. -
Page 6: Installation
3. Apply CO2 gas through the gas cell – an amount equal to or lower than the “full-scale” of the unit. Example: if you are checking a 2008SDH-2AP 100% unit flowing 100.00% gas through the gas cell at a flow rate of about 50ml/min., it should produce a reading of 1.00V ±... -
Page 7: Servicing
VALTRONICS MODEL 2008SDH-2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL FIGURE 3 V. SERVICING A. Zero Adjustment If the accuracy of the unit is in doubt, “zero-check” it by using a cylinder of Nitrogen or -free air. 1. Remove protective cap from the top of the nitrogen cylinder. Push and thread pressure regulator valve onto cylinder outlet. -
Page 8: Span Adjustment
INSTRUCTION MANUAL B. Span Adjustment Note: It is not normally necessary to adjust the span on the Model 2008SDH-2AP. Once the span has been properly adjusted at the factory, it does not require adjusting. All that is normally required is a zero check or adjustment. -
Page 9: Specifications
VALTRONICS MODEL 2008SDH-2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL VI. SPECIFICATIONS • Method: N.D.I.R. (Non-Dispersive Infra-red) Sample-Draw type gas sampling • Gas Sample Hose Barbs: Designed for ⅛ inch I.D. tubing and a flow rates between 0.05 and 0.3 liters/minute • Gas: Carbon Dioxide (CO •... -
Page 10: Technical Notes
VALTRONICS MODEL 2008SDH-2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL VII. TECHNICAL NOTES 1. How to avoid Ground Loops: As seen in figure 4, you should keep the power supply circuit and the signal circuits separated. Even though the Power common and the Signal... - Page 11 VALTRONICS MODEL 2008SDH-2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL FIGURE 5 Copyright 2017 VTI-Valtronics Inc.
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Page 12: Assistance/Tech Support
VALTRONICS MODEL 2008SDH-2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL VIII. ASSISTANCE OR TECHNICAL SUPPORT Before calling for assistance or technical support, please refer to the technical note above. If you still need help, follow the instructions below. When calling, please know the purchase date, the complete model and serial number of the unit. - Page 13 VALTRONICS MODEL 2008SDH-2AP CARBON DIOXIDE MONITOR INSTRUCTION MANUAL NOTES Copyright 2017 VTI-Valtronics Inc.
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