EVERWATCH 8620 User Manual

Room pressure monitor

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Model 8620



VER

ATCH

Room

Pressure

Monitor

User's Guide

Table of Contents

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Summary of Contents for EVERWATCH 8620

Page 1 Model 8620  ATCH Room Pressure Monitor User's Guide...
Page 2 Model 8620  ATCH Room Pressure Monitor User's Guide July 1994 P/N 1980105 Rev. B U.S. AND CANADA OTHER COUNTRIES Sales & Customer Service: Sales & Customer Service: (800) 777-8356/(651) 490-2711 (001 651) 490-2711 Fax: Fax: (651) 490-2874 (001 651) 490-2874...
Page 3 Copyright TSI Incorporated/July 1994/All rights reserved. Part number1980105 Rev. B LIMITATION OF WARRANTY AND LIABILITY Seller warrants that this product, under normal use and service as described in the operator's manual, shall be free from defects in workmanship and material for a period of twenty-four (24) months, or the length of time specified in operator's manual, from the date of shipment to the customer.
Page 5: Table Of Contents
CONTENTS Introduction Chapters Getting Started Configuration Calibration Operation Front Panel Display Front Panel Controls Configuration Description of Configuration Menu Functions Configuration Procedure Calibration Calibration Procedure Maintenance Velocity Sensor Cleaning Replacement Parts Troubleshooting Appendix Specifications Theory of Operation Typical Wiring Diagram Configuration Menu Flow Chart Figures Front Panel Display and Controls...
Page 6 CONTENTS...
Page 7: Introduction
INTRODUCTION The E User's Guide describes how to operate, configure, calibrate, ATCH  maintain and troubleshoot the Model 8620 E Room Pressure ATCH Monitor. Please read this guide thoroughly before using the E ATCH This guide assumes that the E has been properly installed.
Page 8 INTRODUCTION...
Page 9: Chapters 1 Getting Started
CHAPTER ONE GETTING STARTED Configuration The rooms and the environment in which the E operates vary ATCH from facility to facility. There are a variety of ways to display and use the information gathered by the E . The configuration ATCH procedure is used to program the E to present the...
Page 10 CHAPTER 1...
Page 11: Operation
CHAPTER TWO OPERATION The E Room Pressure Monitor is easy to use. Its operation is simple ATCH and straightforward. All the information you need to know about the room pressure is displayed on the monitor's front panel. All calibration and configuration programming is accessible through the keypad.
Page 12: Front Panel Display
Front Panel Digital Display Display The digital display indicates the room pressure with respect to REFERENCED CORRIDOR, calibration and configuration menus, and error messages. The display indicates the room pressure continuously, the error messages when they occur, and the calibration and configuration menu items when either of these programming modes is selected.
Page 13: Front Panel Controls
 There is a 10 second delay between when the pressure triggers an alarm and when the monitor shows the alarm condition. This is used so the alarms don't trigger when someone opens a door to enter or leave the room.
Page 14 CHAPTER 2...
Page 15: Configuration
CHAPTER THREE CONFIGURATION The E is a very versatile device which may be set to operate in a ATCH variety of configurations. This chapter is a guide for configuring the ATCH The configuration menu is used to select the low alarm set point, high alarm set point, display period, alarm light response, alarm relay response, audible alarm response, elevation correction and analog output resolution.
Page 16: Description Of Configuration Menu Functions
 The magnitude of the alarm increments changes with the magnitude of the set point. ① When the magnitude of the setpoint is less than 10.00 inches H 2 0 X 0.001, the increments equal 0.05 inches H 2 0 X 0.001. ② When the magnitude of the setpoint is between 10.00 and 100.00 inches H 2 0 X 0.001, the increments equal 0.50 inches H 2 0 X 0.001.
Page 17 high alarm set point can be set is 1.00 inches H 2 O x 0.001. If the magnitude of the alarms is greater than 100.00, the deadband increases to 5.00 inches H 2 0 x 0.001.  The alarm set points must have the same sign. Normal room pressure should lie between the high and low alarm set points.
Page 18 relay contacts close in an alarm condition and open when the room pressure returns to normal. Audible Alarm The audible alarm function is used to select whether the audible alarm latches in an alarm condition(LA) or follows an alarm condition(UnLA). When alarm latch is selected the audible alarm turns on in an alarm condition and remains on...
Page 19: Configuration Procedure
SAVE Save The save function confirms that any new values entered have been saved to memory. Save is displayed only when new values have been entered. Configuration The E is configured as follows: ATCH Procedure Enter the Configuration Menu  Press and hold the NORMAL key until CONF is indicated on the display, then release the NORMAL key.
Page 20 Set the Low Alarm Set Point  Confirm that L AL is indicated on the display.  Press and release the NORMAL key to display the current low alarm set point.  Use the  or  keys to change the low alarm set point value. ...
Page 21 Set the Low and High Alarm Light Configuration  Confirm that LEdS is indicated on the display.  Press and release the NORMAL key to display the current alarm light configuration.  Press and release the  key to select latched (LA) operation, or the ...
Page 22 Enable/Disable the Audible Alarm  Confirm that dSbL is indicated on the display.  Press and release the NORMAL key to display the current status of the audible alarm disable function.  Press and release the  key to turn the audible alarm disable function on, or the ...
Page 23 Enable/Disable the Access Code Function  Confirm that PASS is indicated on the display.  Press and release the NORMAL key to display the current status of the access code enable function.  Press and release the  key to turn the access code enable function on, or the ...
Page 25 CHAPTER FOUR CALIBRATION The E Room Pressure monitor can be calibrated to special systems. ATCH This should only be done if the system is unusual, such as "8 ft long tube etc". Follow these steps to calibrate the room pressure monitor: ...
Page 26: Calibration Calibration Procedure
Calibration Turn power to the E on and allow the unit to warm up before ATCH Procedure beginning the calibration procedure. The keypad is disabled and SEnS is indicated on the display for approximately 15 seconds while the sensor and monitor electronics stabilize. Enter the Calibration Menu ...
Page 27 Set the Velocity Calibration Span  Confirm that the sensor is displaying the velocity in FPM.  Set pressure controls of room to normal operation.  Place the sensor of the air velocity meter in an opening between the measured room and the reference space (i.e. a laboratory and the adjoining corridor).
Page 28 CHAPTER 4...
Page 29: Maintenance
CHAPTER FIVE MAINTENANCE AND REPAIR The E is almost maintenance free. An occasional sensor cleaning is all ATCH that is needed to insure that the E is operating at optimum ATCH performance. Velocity Significant build-up of dust or dirt on the pressure sensor can degrade its Sensor performance.
Page 30 CHAPTER 5...
Page 31: Troubleshooting
CHAPTER SIX TROUBLESHOOTING Table 2. Troubleshooting Symptom Corrective Action The display is blank Check the wiring for power and continuity. Is the circuit breaker on? Is there proper voltage at the transformer primary? Is there 24 VAC at the transformer secondary? Is there 24 VAC at the monitor terminal block pins 1 and 2?
Page 32 Symptom Corrective Action "dATA Err" is indicated The operating parameters or data may have on the display been lost or changed by an electrical disturbance. Configure the E ATCH "CAL Err" is indicated The factory calibration data has been corrupted by an electrical distrubance. Send monitor and sensor back to TSI for recalibration.
Page 33: Appendix A Specifications
APPENDIX A SPECIFICATIONS Model 8620 English Units Room Pressure Display Range -0.19999 to +0.19999 inches H 2 O Resolution 5% of reading 10% of reading, 0.00001 inch H 2 O Accuracy Display Update 1 second Response Time Adjustable (2-10 Seconds) Low Alarm Range* -0.19500 to +0.19500 inches H 2 O...
Page 34 APPENDIX A:SPECIFICATIONS...
Page 35: Theory Of Operation
These components are: Part Number Description 800321 Pressure Sensor 800311 Sensor Cable 800104 Pressure Monitor 800420 Transformer 800414 Transformer Cable All of these components are included when a standard Model 8620 E ATCH is ordered.
Page 36: Ever Watch Bridge Circuit
Technical Pressure Sensor Description The sensor assembly consists of two air velocity sensors and a temperature compensation sensor. The velocity sensors are heated to 35C above the ambient air temperature by the monitor electronics. The temperature compensation sensor corrects for changes in the ambient air temperature, forcing the velocity sensors to remain at constant temperature over the ambient air temperature (constant overheat).
Page 37: Display Averaging Period Example
Monitor Electronics When power is applied to the E the internal microcomputer ATCH retrieves data stored in nonvolatile memory, executes self-diagnostic tests, and begins monitoring the room pressure. The microcomputer reads the voltage at the top of the bridge circuit every second and calculates the room pressure.
Page 38 Alarms The E microcomputer constantly compares the measured ATCH room pressure to the programmed low and high alarm set points and indicates the current condition via visual alarms, an audible alarm and alarm contacts. Visual Alarms The E has alarm lights which indicate both low and high ATCH alarms.
Page 39 Alarm Relay Contacts The EVERWATCH has alarm relay contacts for remote monitoring of both low and high alarms. The alarm contacts can be configured for alarm latch operation or alarm follow operation.
Page 40 Alarm Latch Operation. The alarm contacts close when an alarm condition exists and remain closed until the room pressure returns to normal and the monitor is reset. When the magnitude of the room pressure falls below or is in the opposite direction of the low alarm set point, the low alarm contacts close.
Page 41: C Typical Wiring Diagram
APPENDIX C WIRING DIAGRAM ATCH Figure 3. E Wiring Diagram. ATCH...
Page 42 APPENDIX C: E WIRING DIAGRAM ATCH...
Page 43: D Configuration Menu Flow Chart
APPENDIX D FLOW CHART...
Page 44 APPENDIX D: FLOW CHARTS...