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SENTRY™
OPERATORS MANUAL
Rev. D
April 2016
COPYRIGHT NOTICE: Copyright 2016 Edgetech Instruments Inc. (ETI)
This work is protected under Title 17 of the US Code and is the sole property of ETI No part of this document may be copied
or otherwise reproduced, or stored in any electronic information retrieval system, except as specifically permitted under US
copyright law, without the prior written consent of ETI.
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Table of Contents
Summary of Contents for Edgetech SENTRY-85
- Page 1 Rev. D April 2016 COPYRIGHT NOTICE: Copyright 2016 Edgetech Instruments Inc. (ETI) This work is protected under Title 17 of the US Code and is the sole property of ETI No part of this document may be copied or otherwise reproduced, or stored in any electronic information retrieval system, except as specifically permitted under US...
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Page 2: Quick Startup Guide
A power connection needs to be available within 3m (10ft). There are two models available: SENTRY-85: Combined strobe light and 85dB Audible Alarm. SENTRY-100: Separate strobe light and 100dB Audible Alarm. 3m Power Cord... - Page 3 Mounting the Display and control box. Both the Sentry 85 and Sentry 100 have the same mounting process. 5.12in (130.0mm) 4.53in (115.0mm) RH 49.0% P 150 PSIG 23.7C DP 12.4C 1.38 in 1.32 in (35.1mm) (34mm) Dew Point -10C Pressure: 120 PSIG 4.53in (115.0mm) COVER REMOVED TO...
- Page 4 ESD Protection Electrostatic Discharge (ESD) can cause immediate or latent damage to electronic circuits. Edgetech Instruments products are adequately protected against ESD for their intended use. It is possible to damage the product, however, by delivering electrostatic discharges when touching, removing, or inserting any objects inside the equipment housing.
- Page 5 5. Ensure the Probe is inserted to an adequate depth to obtain a good flow of the sample gas around the tip sensor. Insertion depth: Max 6” (15cm) Min 2.4” (6cm). The compression fitting should avoid the threaded tip cover joint area. 6.
- Page 6 Notes: Connect only the outputs desired. Do not apply Power until all wiring is completed. When the unit is powered up the display will show the Alarm set point (Pressure and Dew point). Default factory set Alarm points are Pressure 90PSIG and DewPoint -20F. When the unit is powered up the display will show the 4-20mA range settings for optional remote connections.
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Page 7: Table Of Contents
TABLE OF CONTENTS Page 1.0 Quick Startup Guide 2.0 Commitment to Quality 3.0 Introduction 3.1 General Description 3.2 Standard Factory Configurations 3.2.1 Factory Default Output Ranges 3.3 Options and Accessories 4.0 Installation 4.1 Placement of Instrument 4.2 Mounting 4.2.1 Display Mounting 4.3.1 Probe Mounting 4.3 Electrical Wiring 4.3.1 Power Supply... - Page 8 LIST OF TABLES 4-1 Terminal Strip Wiring 4-2 Analog Output Switch Settings 5-1 Serial Cable Wiring...
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Page 9: Commitment To Quality
2.0 EDGETECH INSTRUMENTS INC.'S COMMITMENT TO QUALITY Thank you for purchasing one of our products. At Edgetech Instruments, it is our policy to provide cost-effective products and support services that meet or exceed your requirements, to deliver them on time, and to continuously look for ways to improve both. -
Page 10: Introduction
A power connection needs to be available within 3m (10ft). There are two models available: SENTRY-85: Combined strobe light and 85dB Audible Alarm. SENTRY-100: Separate strobe light and 100dB Audible Alarm. 3m Power Cord... -
Page 11: Factory Default Output Ranges
3.2.1 FACTORY DEFAULT OUTPUT RANGES These standard output measurement ranges apply to all instruments unless specified otherwise when ordering. They correspond to 4 to 20 mA. There are 2 analogue outputs the factory defaults at selected. Analogue output 1 Dew Point. Analogue output 2 is set for Pressure or %RH depending on probe tip selection. -
Page 12: Installation
4.0 INSTALLATION 4.1 PLACEMENT OF INSTRUMENT If possible, locate the Sentry in a clean area where the air to be measured is allowed to freely move around the enclosure. Optimal performance of the instrument is experienced when air is gently moving over sensor, providing a representative sample for measurement. -
Page 13: Electrical Wiring
6. Tighten the swage fitting till it grips the probe in place but at this stage do not apply force. 7. Re check the probe position and measurement depth are correct, fully tighten all pipe fittings 8. Slowly pressurize the system checking for any leaks. Do not quickly apply pressure. -
Page 14: Input/Output Wiring
Figure 4-2 Terminal Strip Wiring ALARM 2 RS232 RX RS232 TX CHASSIS GND RS232 RTN ANALOG OUT 1 ANALOG OUT RTN ANALOG OUT 2 4.3.2 INPUT/OUTPUT WIRING Wire the Analog Outputs as required. See 4.1 above for information on output selection. -
Page 15: Operation
5.0 OPERATION USING THE RS-232C SERIAL PORT TO REPROGRAM YOUR SETTINGS Note: If the Factory Default settings are satisfactory, there is no reason to perform any programming. The Sentry series air header system alarm is very versatile. Through the Serial Port, the user may view current settings, change factory set parameters, or receive an automatic update of system measurements and alarm status. -
Page 16: Serial Port Setup
5.3 PC with USB Port only If your PC does not have an available serial port, you can use the ETI accessory: RSCBL (RS232 cable) plus the USB (USB to SERIAL Converter). The ETI kit provides the 3 stripped RS232 wires, labeled and the wire ends properly tinned- to be connected to the Sentry plus a USB converter jack to plug into your PC USB port. -
Page 17: Changing Between Metric & Imperial
Check your terminal emulation program, the power supply, and check the interconnecting cable wiring as shown in Table 5 -1 above. NOTE: WHEN PROGRAMMING ALPHABETIC CHARACTERS, USE UPPER CASE ONLY. To begin reprogramming, press the ESCape key on your computer keyboard. The window will change to that shown below. -
Page 18: Calibrating The Alarm Relays
To set Output 2, Enter “2 In the example, Output 2 is set to represent pressure by entering “7” when prompted. Pressure is represented in the Sentry as PSIG units. You will be prompted to enter a psig value for the low setting. In the example, 4 mA is set to “0”... -
Page 19: Maintenance
the trigger point. The factory default is 5 degrees below the trigger point. Both conditions must be at return to normal operation before the alarm turns off. To set the Alarm setpoints enter “M”. The current settings will be displayed. Then follow the prompts to enter the setpoints. -
Page 20: Specifications
7.0 SPECIFICATIONS Measurement Range: Dew Point: -40°C to 95°C (-40°F to 140°F) LDP Option -60°C to 95°C (-75°F to 140°F) Ambient Temperature: -40°C to 125°C (-40°F to 140°F) Equivalent %RH: 1% to 99.9% Operating Temperature: Sensor: -60°C to 125°C (-40°F to 149°F) Control Unit: 0°C to 50°C (32°F to 122°F) Pressure:... -
Page 21: Appendix
8.0 APPENDIX Warranty Statement NIST Traceability Mounting Dimensions... -
Page 22: Warranty Statement
Massachusetts, free of charge, for a period of twelve months. Malfunction due to improper use is not covered in this warranty and Edgetech Instruments Inc. disclaims any liability for consequential damage resulting from defects in the performance of the equipment. - Page 23 8.2 N.I.S.T. TRACEABILITY – WHAT DOES IT MEAN? This precision measuring instrument is certified by Edgetech Instruments Inc. to be traceable to N.I.S.T., the National Institute of Standards and Technology (formerly known as the National Bureau of Standards, or NBS), in Gaithersburg, Maryland, U.S.A.
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Page 24: Mounting Dimensions
OVERALL AND MOUNTING DIMENSIONS 8.3.1 WALL MOUNT DIMENSIONS 5.12in (130.0mm) 4.53in (115.0mm) RH 49.0% P 150 PSIG 23.7C DP 12.4C 1.38 in 1.32 in (35.1mm) (34mm) Dew Point -10C Pressure: 120 PSIG 4.53in (115.0mm) COVER REMOVED TO SHOW MOUNTING HOLES Notes...
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