SafeTNet - User Manual
Contents
1. 1 Pull the bottom of both security latches forward toward the housing door 2 Push the housing door back and release the top of both latches from the catches on the housing door 3 Open the housing door 71 1420 REV D 5 Safe T Net 100 Operator s Manual Internal Description This section describes the internal components of the Safe T Net 100 AC Power Terminal Strip AC Fuse Alarm Relays Range Selector Adapter Card 1 E Alarm Adjust 0 Potentiometers Alarm Disable 8 Button Warm Alrm Display Button 10 LJ Alarm Logic Switch 42 SENSOR 8 SENSOR 7 SENSOR 6 1 GUARD 12BA BAN REC RECN O DC Fuse Transformer Sensor Terminal Strip F P ln P P Figure 2 1 Internal Component Location 6 71 1420 REV D Functional Description AC Power Terminal Strip TB1 SW NOTE See Chapter 3 Installation for complete wiring procedures This 12 point terminal strip is on the left side of the main circuit board see Figure 2 1 Each terminal is labeled and numbered The labels are printed on the circuit board directly to the left of the terminal strip They describe each terminal s functi2. Connect the hot black lead to H terminal 10 the neutral white lead to N terminal 11 and the ground green lead to G terminal 12 ecSececececececececeoececeoSo boa 10H JenneN punog Figure 3 4 AC Power Wiring 4 Test the connection by gently pulling the leads from the terminal connections 20 71 1420 REV D Installation CAUTION A Make sure the operating voltage 115 or 220 of the Safe T Net 100 matches the voltage of the AC power source The operating voltage of the Safe T Net 100 is shown on a label attached to the inside of the housing door DC Power Wiring Vy CAUTION DC power connections are provided as a backup to the primary AC power source for the Safe T Net 100 If AC power is unavailable use 12 to 18 VDC power as a primary power source to operate the Safe T Net 100 continuously 1 Open the housing door and locate the sensor terminal strip It is on the lower right corner of the main circuit board 2 Run a DC power cord through the conduit hub to the left of the buzzer 3 Connect the power cord to terminals 3 and 4 of the sensor terminal strip see Figure 3 5 Connect the positive lead to 12BA terminal 4 and the negative lead to BA terminal 3 Se I T tes dte 2 REC 4 REC SSSSSSSS Positive
3. m Negative Figure 3 5 DC Power Wiring 4 Test the connection by gently pulling the leads from the terminal connections 71 1420 REV D 21 Safe T Net 100 Operator s Manual Start Up Complete the following procedure to place the Safe T Net 100 in normal operation Preparing for Start Up 1 Complete the mounting and wiring procedures described earlier in this chapter 2 Complete installation procedures as described in the transmitter Operator s manual 3 Check to make sure that all wiring connections are secure and correct Introducing Incoming Power 1 Plug in or turn on the incoming power AC and or DC at the power source end Ww WARNING The warn and alarm circuits are not active for 45 seconds after the Safe T Net 100 initially receives the incoming power This time delay prevents false alarms during detector warm up Verifying Indicator Lights 1 After you connect or turn on the incoming power source check the status indicator lights on the housing door 2 Verify the PILOT light is on If the PILOT light is off the Safe T Net 100 is not receiving the incoming power Ww WARNING Unplug or turn off the incoming power at the power source before you make wiring adjustments or remove the fuse 3 Check the AC or DC power connections in the Safe T Net 100 and at the power source if the
4. BY ANY PERSON OR ENTITY OTHER THAN SELLER WITHOUT SELLER S PRIOR WRITTEN APPROVAL OR ANY USE OF REPLACEMENT PARTS NOT SUPPLIED BY SELLER SHALL IMMEDIATELY VOID AND CANCEL ALL WARRANTIES WITH RESPECT TO THE AFFECTED PRODUCTS THE OBLIGATIONS CREATED BY THIS WARRANTY STATEMENT TO REPAIR OR REPLACE A DEFECTIVE PRODUCT SHALL BE THE SOLE REMEDY OF BUYER IN THE EVENT OF A DEFECTIVE PRODUCT EXCEPT AS EXPRESSLY PROVIDED IN THIS WARRANTY STATEMENT SELLER DISCLAIMS ALL OTHER WARRANTIES WHETHER EXPRESS OR IMPLIED ORAL OR WRITTEN WITH RESPECT TO THE PRODUCTS INCLUDING WITHOUT LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE SELLER DOES NOT WARRANT THAT THE PRODUCTS ARE ERROR FREE OR WILL ACCOMPLISH ANY PARTICULAR RESULT Thermo Fisher Scientific TABLE OF CONTENTS Chapter 1 Introduction OVV EW ORR RC US Waa CR AR RR Ud 1 D SCHDptOn ale Mae er ere ee en e 1 Application RE wesc acts avi pae 2 JNCCESSOTIES rettet dete dee FR UP Ud FREIE 3 Specifications conde br reper ha ye pd pU Eb pes 4 Chapter 2 Funtional Description OV ETI Wo o1 vestes e AES 5 Internal Description s ose serino e a s e o e 6 Chapter 3 Installation Mounting RA abd A E date ae ER 15 x E EE E 16 Stat e a a a ede oleae bane dau 22 Removal e
5. Dimensions Weight Power source Temperature range Humidity range Controls Alarm delay setting Fail delay setting Relays Standard accessories Optional accessories Fiberglass with polycarbonate window rated NEMA 4X 10 94 in Hx 85 W x 625 in D 278 mm x 216 mm x 158 mm 8 lbs approximate 3 6 kg approximate 100 to 130 VAC 200 to 260 VAC or 12 to 16 VDC 4 F 20 C to 113 F 45 0 to 95 RH non condensing RESET ADJ and CAL buttons range selector and alarm logic switches WARN ALARM and DLY adjust potentiometers 1 seconds 2 seconds 3 amps 240 VAC resistive 5 amps 120 VAC resistive 5 amps 24 VDC resistive Operator s manual quick reference card Test kit AC line cord alarm horn DC Power Supply with Backup Battery Unit must be ordered for nominal 100 to 130 VAC or 200 to 260 VAC Either version can also be operated from 12 16 VDC d User adjustable 71 1420 REV D FUNCTIONAL DESCRIPTION Overview This chapter describes the internal components of the Safe T Net 100 All internal components are attached or connected to the main circuit board A screw in each corner of the main circuit board secures the board to the housing Each component is identified on the circuit board by a printed designation The designations are noted in this chapter in parenthesis XX next to the component heading To gain access to the interior of the Safe T Net 100
6. PILOT light is off Also check the AC and DC fuses 4 The indicator lights on the housing door show the current status of the Safe T Net 100 during the start up procedure Table 3 2 Start up Indications shows the status indicated by each light and the suggested response 22 71 1420 REV D Table 3 2 Start up Indications Installation Indicator Probable Status Light Recommended Response PILOT Receiving power FAIL Detector or circuitry is broken incomplete or incorrect Adapter card is not connected or is connected incorrectly None 1 Verify detector wiring is correct and secure 2 See the Troubleshooting section in the transmitter Operator s manual 1 Make sure adapter card is connected 2 Make sure potentiometers on adapter card face toward the circuit board away from the side of housing 3 Contact Thermo Fisher Scientific for further instruction Removal 1 Disconnect or turn off the incoming power at the power source end 2 Disconnect the power wiring from the AC power terminal strip and pull the wires out of the housing through the conduit hub If the optional AC line cord is used leave it connected to the terminal strip Ww WARNING Make sure power to the relay circuits is turned off before you perform Step 3 3 Disconnect and remove any other connections made to the AC power terminal strip 4 Disconnect and remove all connections made to the sensor terminal
7. a weatherproof housing Wire the horn to the AC power terminal strip as described in the External Alarm Wiring section of Chapter 4 Installation The horn operates on 115 VAC power The alarm horn is an optional accessory The AC power terminal strip has separate relay output terminals for ALARM WARN and FAIL The alarm horn only repeats the audible alarms for the relay output to which it is wired For example if the horn is wired to the terminal marked WARN RELAY the horn only repeats the audible alarms of a warn condition NY NOTE The alarm horn sounds a steady tone for all alarms If the Safe T Net 100 sounds a pulsing tone the alarm horn sounds a steady tone When the alarm horn sounds an alarm verify the visual and audible alarms at the Safe T Net 100 to determine the status of the Safe T Net 100 AC Line Cord The AC line cord is a 3 conductor cable for 115 VAC power connection It is 8 feet long The AC line cord includes a 3 4 in x 1 2 in reducer bushing and cord grip fitting for installation See Chapter 4 Installation for AC power wiring instructions The AC line cord is an optional accessory 71 1420 REV D 41 Safe T Net 100 Operator s Manual 42 71 1420 REV D Chapter 6 GAS DETECTION Overview This chapter lists remote transmitters that can be ordered with your Safe T Net 100 The remote transmitter includes the following Amplifier Junction Box if applicable e Sample housing
8. door is unlatched close the housing door place the top of each latch on its catch on the housing door and push the bottom of each latch toward the back of the housing until the latch locks 3 Position the Safe T Net 100 on a vertical surface at approximately eye level 4 1 2 to 5 feet from the floor 4 Four mounting feet are attached to the back of the housing at each corner Secure the housing to the vertical surface with 1 4 in screws through each mounting foot Wiring This section describes detector external alarm recorder output AC power and DC power wiring procedures Y V CAUTION Make all wiring connections in conduit through the hubs on the bottom of the housing Do not wire power and detector wiring in the same conduit Detector Wiring INTERNAL AMPLIFIER VERSIONS The internal amplifier versions of the Safe T NET 100 are furnished with the detector wiring already installed Refer to the appropriate manual insert for information on wiring the internal amplifier versions REMOTE AMPLIFIER VERSIONS Ww WARNING Make sure all power to the Safe T Net 100 is disconnected or turned off during all wiring procedures 16 71 1420 REV D Installation 1 Use a 2 or 3 conductor shielded cable or run the wiring in metal conduit to reduce the possibility of RFI Radio Frequency Interference or EMI Electromagnetic Interference 2 Run the wires or cable through the conduit hub to the right of the buzzer on the
9. each corner on the back of the housing Secure the housing to the vertical surface with screws through each hole Use screws that are appropriate for the mounting surface WIRING Ww WARNING Make all other wiring connections before you make connections to the DC power supply with backup battery Make sure you turn off all AC power before you make the following wiring connections 1 Run AC power wires through the knockout on the left side or the top of the housing and connect the AC line to the white and black leads that extend from the left side of the transformer Connect the hot or positive AC lead from the power source to the transformer s black lead connect the neutral or negative AC lead from the power source to the transformer s white lead SJ WARNING The red and black wires of the battery wiring harness receive power from the batteries and are active before the incoming power is connected Do not touch the wires to each other or any other conductor while making wiring connections 2 Confirm that the leads extending from the right side of the transformer are connected to the terminals marked LOW VOLTAGE AC CONNECTION on the input terminal strip If necessary connect the leads to the terminals 3 Plug in or turn on the incoming AC power at the power source end 34 71 1420 REV D Accessories 4 Connect a multimeter to the terminal marked DC OUTPUT on the output terminal strip and verify a multim
10. if applicable Detector Operator s Manual Tables 6 1 and 6 2 indicate the gas detection options offered for the Safe T Net 100 Refer to the transmitter operator s manual for information on installation operation and maintenance of the transmitter 71 1420 REV D 43 gt Table 6 1 Remote Transmitter Type Detection Add 0 1 14 Part Number Part Number Part Number Part Number Part Number STD Diffusion STD Sample Draw FX SMT FX SMTN FX IR Ammonia NH3 67 0027 09 68 0020 09 67 0024 09 67 0025 09 Arsine AsH3 67 0027 13 68 0020 13 67 0024 13 67 0025 13 Carbon Monoxide CO 67 0027 01 68 0020 01 67 0024 01 67 0025 01 Chlorine Cl 67 0027 04 68 0020 04 67 0024 04 67 0025 04 Chlorine Dioxide 1 67 0027 16 68 0020 16 67 0024 16 67 0025 16 Combustibles 65 5001 68 0005 67 0021 01 N A 67 0022 01 Diborane B5Hg 67 0027 18 68 0020 18 67 0024 18 67 0025 18 Fluorine 67 0027 07 68 0020 07 67 0024 07 67 0025 07 Hydrogen Chloride 67 0027 05 68 0020 05 67 0024 05 67 0025 05 Hydrogen Cyanide HCN 67 0027 08 68 0020 08 67 0024 08 67 0025 08 Hydrogen Fluoride HF 67 0027 06 68 0020 06 67 0024 06 67 0025 06 Hydrogen Sulfide HS 67 0027 02 68 0020 02 67 0024 02 67 0025 02 Nitric Oxide NO 67 0027 14 68 0020 14 67 0024 14 67 0025 14 Nitrogen Dioxide NO 67 0027 15 68 0020 15 67 0024 15 67 0024 15 Oxygen O5 67 0027 03 68 0020 03 67 0024 03 67 0025 03 jenu
11. indicator lights are still active and the reading on the display screen flashes after you disable the warn and alarm circuits D YW NOTE The alarm disable button disables the warn and alarm circuits 5 minutes from the time you push it Pushing the button several times does not accumulate the time that the circuits are disabled The alarm disable button also displays the current alarm delay setting after you press the warn alarm display button twice See Chapter 4 Maintenance for a description of this procedure Warn Alarm Display Button S3 The warn alarm display button is directly to the right of the alarm disable button see Figure 2 1 It is marked ADJ When you push it the current warn and alarm settings are shown on the display screen See Chapter 4 Maintenance for a description of this procedure Fuses Two fuses protect the power circuitry from internal failure of the Safe T Net 100 AC Fuse F1 The AC fuse is above the transformer see Figure 2 1 It protects the AC line circuitry and it is rated at 0 5 amp A cover on the AC fuse protects you from accidental shock DC Fuse F2 The DC fuse is below the alarm logic switch see Figure 2 1 It protects the DC line circuitry and it is rated at 1 0 amp 71 1420 REV D 13 Safe T Net 100 Operator s Manual Adapter Card The adapter card plugs into the top right corner of the main circuit board see Figure 2 1 A guide secures the adapter card to the cir
12. is to the left ON WRN 10 71 1420 REV D Functional Description SWITCH 4 Switch 4 controls the alarm relay The left position is labeled EN ON ALM In this position the alarm relay is normally de energized and energizes when the Safe T Net 100 is in alarm condition The right position is labeled DE EN ALM In this position the alarm relay is normally energized and de energizes when the Safe T Net 100 is in alarm condition Standard factory setting is to the left EN ON ALM SWITCH 5 Switch 5 defines a warn condition The left position is labeled INCR WRN In this position the Safe T Net 100 defines a warn condition as an increasing reading that reaches the preset warn level The right position is labeled DECR WRN In this position the Safe T Net 100 defines a warn condition as a decreasing reading that falls to the preset warn level Standard factory setting is to the left INCR WRN SWITCH 6 Switch 6 controls the resetting of the warn circuit when a warn condition clears The circuit operates according to the logic selected by Switch 2 The left position is labeled LATCH WRN In this position you must manually reset the warn circuit by pressing the RESET button if the Safe T Net 100 is or was in a warn condition The right position is labeled AUTO RST WRN In this position the warn circuit automatically resets when the display reading falls below the preset warn level Standard factory setting is to the
13. reads the alarm logic switch when it initially receives incoming power To adjust any of the functions described below disconnect the incoming power source adjust the alarm logic switch then re connect the incoming power source SWITCH 1 Switch 1 controls the fail circuit It is factory set and should not be user adjusted SWITCH 2 Switch 2 controls the alarm logic of the Safe T Net 100 The left position is labeled STEADY LOGIC In this position the status indicator lights are steady during a warn or alarm condition and the WARN light flashes the warn relay de energizes and the buzzer silences in warn condition only if you press the RESET button The right position is labeled FLASH LOGIC In this position the status indicator lights flash during a warn or alarm condition and are steady if you press the RESET button You cannot silence the buzzer or de energize the relays until the display reading indicates a normal condition and you press the RESET button Standard factory setting is to the left STEADY LOGIC SWITCH 3 Switch 3 controls the warn relay The left position is labeled EN ON WRN In this position the warn relay is de energized in normal condition and energizes when the Safe T Net 100 is in warn condition The right position is labeled DE EN WRN In this position the warn relay is energized in normal condition and de energizes when the Safe T Net 100 is in warn condition Standard factory setting
14. shipment to Buyer for equipment and ninety 90 days for all other products the Warranty Period Seller agrees during the Warranty Period to repair or replace at Seller s option defective Products so as to cause the same to operate in substantial conformance with said published specifications provided that a Buyer shall promptly notify Seller in writing upon the discovery of any defect which notice shall include the product model and serial number if applicable and details of the warranty claim b after Seller s review Seller will provide Buyer with service data and or a Return Material Authorization RMA which may include biohazard decontamination procedures and other product specific handling instructions and c then if applicable Buyer may return the defective Products to Seller with all costs prepaid by Buyer Replacement parts may be new or refurbished at the election of Seller All replaced parts shall become the property of Seller Shipment to Buyer of repaired or replacement Products shall be made in accordance with the Delivery provisions of the Seller s Terms and Conditions of Sale Consumables including but not limited to lamps fuses batteries bulbs and other such expendable items are expressly excluded from the warranty under this warranty Notwithstanding the foregoing Products supplied by Seller that are obtained by Seller from an original manufacturer or third party supplier are not warranted by Selle
15. to return to normal operation 7 Close and latch the housing door 71 1420 REV D Maintenance Adjusting the Alarm Delay The alarm delay feature delays the operation of the status indicator lights buzzer and relays during warn alarm or fail conditions This delay eliminates false alarms due to power transmissions and electrical noise The delay can be set from 0 0 to 16 0 seconds The standard alarm delay and fail delay settings are shown in Table 2 1 Specifications To adjust the delay settings 1 Unlatch and open the housing door Locate the warn alarm display button marked ADJ the alarm disable button marked CAL and the delay adjust potentiometer marked DLY The warn alarm display and alarm disable buttons are on the right side of the main circuit board and are to the left of the adapter card The delay adjust potentiometer is directly below the warn alarm display and alarm disable buttons 2 Push the warn alarm display button ADJ twice The current alarm level is displayed on the display screen and the ALARM indicator light blinks 3 Push the alarm disable button CAL once The current alarm delay setting is displayed on the display screen and the WARN and ALARM indicator lights blink NY NOTE The fail delay setting is twice the setting displayed on the display screen If the display screen indicates an alarm delay setting of 4 5 the actual fail delay setting is 9 0 4 Adjust the delay setting on the di
16. 2 71 1420 REV D Accessories CIRCUIT BOARD The circuit board is to the right of the transformer The circuit board contains components that maintain the charge of the batteries The charging circuit brings low batteries up to full charge and maintains the batteries at an operating level Two four point terminal strips are on the right side of the circuit board The upper terminal strip is the input terminal strip It allows connection to the transformer and one of the batteries The lower terminal strip is the output terminal strip It allows connection to the Safe T Net 100 and an optional fault indicator If a fault condition occurs at the DC power supply with backup battery 12 VDC power is supplied to any indicator wired to the FAULT OUTPUT terminal Thermo Fisher Scientific offers a buzzer that operates from 12 VDC for this purpose The non UL version has a dip switch between the two terminal strips The switch is factory set and should not be adjusted The UL version does not have this dip switch Two indicator lights on the circuit board indicate the status of the DC power supply with backup battery The light marked AC is to the left of the input terminal strip When the AC light is on the DC power supply with backup battery is operating from the AC power source The light marked FAULT is to the left of the output terminal strip When the FAULT light is on one or more of the following conditions may exist low AC power no AC pow
17. E CONCERNING START UP OPERATION CALIBRATION AND MAINTENANCE BE READ UNDERSTOOD AND FOLLOWED NOTATION CONVENTIONS Notices are used in this operator s manual to alert you to hazardous condi tions to person or instrument and to notify you of additional information This operator s manual uses the following notices 7 WARNING Notifies you of potential danger that can result in personal injury or death VV CAUTION Notifies you of potential damage to equipment NW NOTE Notifies you of additional or critical information SERVICE LOCATIONS For additional assistance Environmental Instruments Division has service available from exclusive distributors worldwide Contact one of the phone numbers below for product support and technical information or visit us on the web at www thermo com aqi 1 866 282 0430 Toll Free 1 508 520 0430 International Thermo Fisher Scientific Warranty Seller warrants that the Products will operate or perform substantially in conformance with Seller s published specifications and be free from defects in material and workmanship when subjected to normal proper and intended usage by properly trained personnel for the period of time set forth in the product documentation published specifications or package inserts If a period of time is not specified in Seller s product documentation published specifications or package inserts the warranty period shall be one 1 year from the date of
18. Safe T Net 100 Instruction Manual Rev E Part Number 71 1420 8Jan2008 2007 Thermo Fisher Scientific Inc All rights reserved Specifications terms and pricing are subject to change Not all products are available in all countries Please consult your local sales representative for details Thermo Fisher Scientific Air Quality Instruments 27 Forge Parkway Franklin MA 02038 1 508 520 0430 www thermo com aqi Thermo Fisher Scientific WEEE Compliance This product is required to comply with the European Union s Waste Electrical amp Electronic Equipment WEEE Directive 2002 96 EC It is marked with the following symbol Thermo Fisher Scientific has contracted with one or more recycling disposal companies in each EU Member State and this product should be disposed of or recycled through them Further information on Thermo Fisher Scientific s compliance with these Directives the recyclers in your country and information on Thermo Fisher Scientific products which may assist the detection of substances subject to the RoHS Directive are available at www thermo com WEEEROHS WEEE Compliance WARNING X4 THIS INSTRUMENT IS DESIGNED TO DETECT ONE OR MORE OF THE FOLLOWING FLAMMABLE VAPORS OXYGEN CONTENT AND OR TOXIC GAS AND TO GIVE WARNING BEFORE THEY REACH HARMFUL CONDITIONS IN ORDER TO ENSURE THAT IT WILL WARN OF DANGEROUS CONCENTRATIONS IT IS ESSENTIAL THAT THE INSTRUCTIONS IN THIS MANUAL PARTICULARLY THOS
19. Safe T Net 100 housing Locate the sensor terminal strip at the bottom right of the Safe T Net 100 main printed circuit board 3 If you are using shielded cable connect the shield wire to the screw on the top of the conduit hub 4 Connect the wires to the sensor terminal strip as shown in the table below Table 3 1 STN 100 Sensor terminal strip Detector Transmitter Terminal 6 Terminal7 Terminal8 Type C FB FX SMT LEL TB1 3 TB1 2 FB TB1 1 FX SMT SMTn Toxic O2 No connection 1 2 FB 1 1 FX IR TB3 3 TB3 2 FB TB3 1 Standard LEL FB Standard Toxic O2 No connection FB t Standard 12 24V OUT FB 12 24 sample draw all gases External Alarm Wiring If you plan to use external alarms horn strobe process control etc connect them at this time 4 CAUTION External alarms are controlled by the Safe T Net 100 s relays The relays are rated for 5 amps maximum Do not connect any device with a current load that exceeds the limits of the relay 1 Open the housing door and locate the AC power terminal strip It is on the left side of the main circuit board 2 Run the wiring of the external alarm through the conduit hub to the left of the buzzer 71 1420 REV D 17 Safe T Net 100 Operator s Manual 3 Connect the wiring see Figure 3 2 to the appropriate relay connection ALARM WARN or FAIL Connect the positive or
20. cuit board An edge connector allows electrical connection to the main circuit board A 0 5 amp fuse is mounted near the front of the card and protects the internal power supply from short circuit conditions that might occur at the remote transmitter or in the external wiring Test points and potentiometers are for factory set up Yl CAUTION Do not adjust the potentiometers adjustment may disturb factory settings 14 71 1420 REV D INSTALLATION Mounting 8 5 in pa 21 6 cm Peo ey 15 2 cm al 1 ST 10 9 in 27 7 cm 10 5 26 7 o Y E ELT t Figure 3 1 Outline and Mounting Dimensions Safe T Net 100 Wy CAUTION The Safe T Net 100 is suitable for installation only in a non hazardous environment where general purpose equipment is used The Safe T Net 100 is not suitable for installation in Class I Division 1 or Division 2 areas 71 1420 REV D 15 Safe T Net 100 Operator s Manual 1 Select a convenient mounting area When you select the mounting area consider the following see Figure 3 1 e Is a local power source available Is there enough room to open the housing door Is there enough room to make wiring connections through the conduit hubs Is there enough room to attach the test cup to the detector if it is mounted directly to the Safe T Net 100 during the calibration procedure 2 If the housing
21. e hub to the left of the buzzer EIER rer er 7 REC 1 REC SSSSSSSS Positive i Negative SE J Figure 3 3 Recorder Output Wiring 3 Connect the leads to terminals 1 and 2 of the sensor terminal strip see Figure 3 3 Connect the positive lead to REC terminal 2 and the negative lead to REC terminal 1 Ww CAUTION gt gt The maximum input impedance of the recording device may not exceed 400 ohms 4 Test the connection by gently pulling the leads from the terminal connections AC Power Wiring MP WARNING 7700 Make connections at the Safe T Net 100 terminal strip before you plug in or turn on the AC power Before making any wiring adjustments always verify that the AC power source is not live 1 Open the housing door and locate the AC power terminal strip It is on the left side of the main circuit board 71 1420 REV D 19 Safe T Net 100 Operator s Manual 2 Run an AC power line through the conduit hub to the left of the buzzer If you use the optional AC line cord screw a cable bushing into the conduit hub to the left of the buzzer The bushing is supplied as part of the AC line cord accessory 3 Connect the AC line to terminals 10 11 and 12 of the AC power terminal strip see Figure 3 4
22. elay activates it is either energized or de energized Switches 3 and 4 of the alarm logic switch select normally energized or normally de energized relay operation The relay contacts are isolated and are rated for 3 amps at 240 VAC and 5 amps at 24 VDC and 115 VAC resistive Transformer T1 The transformer is near the lower left side of the main circuit board see Figure 2 1 It converts the incoming AC power to nominal 12 VAC The lower AC voltage is then converted to DC power for operation of the circuits Range Selector S1 The range selector is a 10 position rotary switch near the center of the main circuit board see Figure 2 1 It selects the detection range of the Safe T Net 100 An arrow in the center of the switch indicates the current position of the Range Selector wY CAUTION Do not adjust the range selector It is factory set to match the sensor transmitter supplied with the Safe T Net 100 71 1420 REV D 9 Safe T Net 100 Operator s Manual Alarm Logic Switch S4 The alarm logic switch is below and to the right of the range selector see Figure 2 1 It has eight 2 position switches The alarm logic switch controls various functions of the Safe T Net 100 s visual and audible alarms and relay outputs Each of the eight switches is labeled on the main circuit board and numbered on the switch Each switch and its function is described below from top to bottom 2 The Safe Net 100
23. ens ects RPL OAs EA ee Fe 23 Chapter 4 Maintenance OVetyleW Sep Cer RI ru RE t se AUN ORS 25 Troubleshooting eae RUE eee 26 Chapter 5 Accessories QOVELVIEW ORE are ime dae E Eee dere Ruedas 31 DC Power Supply with backup 31 Alarm Hom cou peo ea der a ak 41 AC lane Cord 41 Chapter 6 Gas Detection QVEDVIEW fei ct RTA AS ROAR BERS Rate oe US e RUNS e E deti kes 43 Appendix A ios bad Vase de en o dada 47 71 1420 REV E ix INTRODUCTION Overview This chapter briefly describes the Safe T Net 100 and its applications It also describes the Safe T Net 100 s accessories and features Expanded descriptions appear in later chapters SAFEINE D000 TYPE 100 GAS MONITOR hermo SCIENTIFIC RESET Figure 1 1 Safe T Net 100 Gas Monitor Description Safe T Net is a family of fixed instrument continuous monitoring systems The Safe T Net 100 is a single point system It detects combustible gas toxic gas or oxygen content at one location The Safe T Net 100 displays the current gas reading and warns you of hazardous gas concentration conditions with audible and visual alarms at two preset alarm levels 71 1420 REVE 1 Safe T Net 100 Operator s Manual Application The Safe T Net 100 is capable of detecting many gases Tables 6 1 and 6 2 l
24. er blown AC FUSE blown BATTERY FUSE incorrect wiring connections and low battery A third light below the BATTERY FUSE does not serve a user function Two 10 amp fuses protect the circuitry of the circuit board The AC FUSE is above the input terminal strip It protects the circuitry of the AC line The BATTERY FUSE is to the left of the input terminal strip It protects the batteries from short circuit conditions BATTERIES Two sealed lead acid batteries are at the bottom of the housing The batteries are rated 12 volts at 7 ampere hours 14 ampere hours total and are rechargeable Positive and negative terminals are on the top of the batteries at the left side A wiring harness connects the two batteries The black lead connects the negative terminals and the red lead connects the positive terminals The wiring harness is factory installed to the input terminal strip 71 1420 REV E 33 Safe T Net 100 Operator s Manual Installation This section describes the installation procedure for the DC power supply with backup battery WW NOTE If you use the DC power supply with backup battery accessory disregard the AC and DC power wiring procedures described in Chapter 3 Installation All power for the Safe T Net 100 is introduced through this accessory MOUNTING 1 Open the housing door and remove the protective foam inserts 2 Position the housing on a vertical surface near the Safe T Net 100 3 A mounting hole is near
25. eter reading of approximately 13 8 VDC Connect the positive multimeter lead to the terminal marked connect the negative multimeter lead to the terminal marked 5 Connect a multimeter to the terminal marked BATTERY CONNECTION on the input terminal strip and repeat Step 4 6 Unplug or turn off the incoming AC power at the power source end 7 Connect the output terminal strip in the DC power supply with backup battery to the sensor terminal strip in the Safe T Net 100 as shown in Table 5 1 Table 5 1 Wiring The DC Power Supply with backup Battery to the Safe T Net 100 Output Term Strip Sensor Term Strip DC Power Supply Safe T Net 100 DC OUTPUT 4 Terminal 4 12BA DC OUTPUT Terminal 3 Run the two wires through the knockout on the right side or the top of the accessory s housing and the left conduit hub on the bottom of the Safe T Net 100 4 CAUTION Make sure the wires from the DC power supply with backup battery are connected to the correct terminals in the Safe T Net 100 An incorrect connection may damage the Safe T Net 100 8 If you are using a device to indicate a fault condition at the DC power supply with backup battery connect the device to the terminal marked FAULT OUTPUT on the output terminal strip 9 Connect the positive lead of the indicator to the terminal marked connect the negative lead of the indicator to the terminal marked 10 Connect the four leads that extend f
26. ey s 10 210d0 001 12N 1 ejes N Table 6 1 Remote Transmitter Type Detection Continued Description Part Number Part Number Part Number Part Number Part Number Y STD Diffusion STD Sample Draw FX SMT FX SMTN FX IR E Ozone 03 67 0027 12 68 0020 12 67 0024 12 67 0025 12 m lt PH3 67 0027 10 68 0020 10 67 0024 10 67 0025 10 Silane SiH4 67 0027 11 68 0020 11 67 0024 11 67 0025 11 Sulfur Dioxide SO 67 0027 17 68 0020 17 67 0024 17 67 0025 17 Detection Operator s 71 0090 71 0114 71 0085 71 0085 Manual Toxic O5 Detection Operator s 71 1420 10 71 1420 10 71 0085 N A 71 0084 Manual Combustibles Sv uonoejeq sey amp Table 6 2 Internal Amplifier Versions Includes STN100 base unit and Amplifier card Description Part Number Part Number Detection Manual Standard Diffusion Inserts Carbon Monoxide CO 73 1422 71 1420 02 Combustibles 72 1301 71 1420 09 Hydrogen Sulfide HS 73 1421 71 1420 05 Oxygen 72 1302 71 1420 07 a Add 0 1 14 jenuey s 10 210d0 001 12N 1 ejes Appendix A Parts List Table A 1 Parts List Part No Description 43 4110 AC Fuse 3AG 1 2A AGC 1 2 43 4181 AC and Battery Fuse 3AG 10A AGC 10 for DC Power Supply with Backup Battery 43 4232 DC Fuse 1 amp Size F 47 1011 AC Line Cord 8 foot 49 1551 12 VDC Battery for DC Power Supply with Backup Battery 49 8103 DC Power Supply with Backup Ba
27. ght of the alarm logic switch see Figure 2 1 The alarm delay is factory set as shown in Table 1 2 Specifications The warn and alarm level are factory set as shown in the transmitter Operator s Manual You can adjust the potentiometers with a small flat blade screwdriver The potentiometers are marked WARN ALRM and DLY WARN RP1 The WARN potentiometer controls the reading at which the warn circuit activates A screw on the potentiometer allows you to adjust the warn setting ALRM RP2 The ALRM potentiometer controls the reading at which the alarm circuit activates A screw on the potentiometer allows you to adjust the alarm setting DLY RP3 The DLY potentiometer controls the delay setting You can adjust this potentiometer to delay the activation of the indicator lights buzzer and relays from 0 to 16 seconds after a warn alarm or fail condition exists A screw on the potentiometer allows you to adjust the delay setting The alarm delay reduces false alarms due to electrical noise and radio frequency interference RFI 12 71 1420 REV D Functional Description Alarm Disable Button S2 The alarm disable button is a push button switch directly above and to the right of the alarm adjust potentiometers see Figure 2 1 It is marked CAL When you push it this button disables the warn and alarm circuits for 5 minutes while you perform calibration or other maintenance procedures uw NOTE The WARN and ALARM
28. hermo Fisher Scientific for further instruction jenuey s 10 210d0 001 12N 1 ejes N Table 5 2 Troubleshooting the DC Power Supply with Backup Battery Continued Condition Symptom s Probable Cause s Recommended Action No Backup e Backup power does not Blown BATTERY 1 Confirm that the connection from the batteries to the JJ Power operate when incoming FUSE input terminal strip is correct and secure ITI lt AC powes Incorrect battery 2 Check the continuity of the BATTERY FUSE If interrupted connection necessary replace the fuse as described in the following pages 3 If the condition continues contact Thermo Fisher Scientific for further instruction 66 Sauosse2oy Safe T Net 100 Operator s Manual Corrective Maintenance This section describes procedures to replace the batteries and the AC or BATTERY FUSE REPLACING THE BATTERIES Perform the following procedure to replace the batteries 1 Unplug or turn off the incoming AC power at the power source end 2 Unlock and open the housing door then disconnect the battery wiring harness leads from the input terminal strip 3 Disconnect the wiring harness leads from the batteries and remove the batteries from the housing 4 Place the replacement batteries in the same position as the old batteries 5 Connect the wiring harness leads to the terminals on the replacement batteries Connect the red leads to the pos
29. hot lead of the external alarm device to C common Connect the positive or hot lead of the external alarm s power source to N C normally closed or N O normally open Connect the negative or neutral lead of the external alarm s power source to the negative or neutral lead of the alarm device N External Alarm H Device TB1 Cc A No N O yno NC C kers 557 Safe T Net 100 Relay shown in de energized state Power Source H Safe T Net 100 AC Power Terminal Strip Figure 3 2 External Alarm Wiring 4 Test the connection by gently pulling the leads from the terminal connections y NOTE The alarm and warn relays are de energized in normal operation and energize when the Safe T Net 100 is in alarm or warn condition To energize the relays in normal condition and de energize them in alarm or warn conditions place switches 3 and 4 of the alarm logic switch to the right before you plug in or turn on the incoming power N O normally open and N C normally closed describe the condition of the relay when it is de energized If the relay is energized in normal operation N C is open and N O is closed 18 71 1420 REV D Installation Recorder Output Wiring 1 Open the housing door and locate the sensor terminal strip It is on the lower right corner of the main circuit board 2 Run the leads from the recording device through th
30. ist the gas detection options offered for the Safe T Net 100 These options have many applications Among the applications are the following Hospitals Public utilities Landfills Petrochemical plants Semiconductor manufacturing Wastewater treatment Oil fields and refineries Paper mills Leather tanneries Mining and metals industry Parking garages Grain storage silos Gasoline generators and engines Furnaces Lumber drying kilns 2 71 1420 REV D Introduction Accessories Table 1 1 provides a brief description of the Safe T Net 100 s standard and optional accessories See Chapter 5 Accessories for more detailed descriptions Table 1 1 Standard and Optional Accessories Accessory Description Safe T Net 100 Includes detailed installation operation Operator s Manual maintenance and calibration procedures for the Safe T Net 100 Safe T Net 100 A brief description of procedures you Quick Reference Card commonly perform at the monitoring area DC Power Supply with Backup Provides the Safe T Net 100 with a primary Battery DC power source and backup power if the primary power source fails Alarm Horn Repeats Safe T Net 100 s audible alarms to a remote area AC Line Cord 3 conductor wire for AC power connection Supplied as a standard accessory for the Safe T Net 100 71 1420 REV D 3 Safe T Net 100 Operator s Manual Specifications Table 1 2 Specifications Housing
31. itive terminals connect the black leads to the negative terminals 6 Connect the battery wiring harness leads to the BATTERY CONNECTION terminal on the input terminal strip Connect the red lead to the positive terminal connect the black lead to the negative terminal 7 Close and lock the housing door then plug in or turn on the incoming AC power at the power source end REPLACING THE FUSES Perform the following procedure to replace the AC or BATTERY FUSE 1 Unplug or turn off the incoming AC power at the power source end 2 Unlock and open the housing door then disconnect the battery wiring harness leads from the input terminal strip 3 Pull the applicable fuse out of its holder Wy CAUTION For continuous protection against fire hazard and to maintain the UL listing for the UL version of this accessory replace the fuse with the same type and rating 4 Push the appropriate replacement fuse into the holder 5 Connect the battery wiring harness leads to the BATTERY CONNECTION terminal on the input terminal strip Connect the red lead to the positive terminal connect the black lead to the negative terminal 40 71 1420 REV D Accessories 6 Close and lock the housing door then plug in or turn on the incoming AC power at the power source end Alarm Horn The alarm horn repeats the Safe T Net 100 s audible alarms at a remote non hazardous location The alarm horn is protected by
32. left LATCH WRN for all versions except oxygen Standard factory setting is to the right AUTO RST WRN for the oxygen version SWITCH 7 Switch 7 defines an alarm condition The left position is labeled INCR ALM In this position the Safe T Net 100 defines an alarm condition as an increasing reading that reaches the preset alarm level The right position is labeled DECR ALM In this position the Safe T Net 100 defines an alarm condition as a decreasing reading that falls to the preset alarm level Standard factory setting is to the left NCR ALM for all versions except oxygen Standard factory setting is to the right DECR ALM for the oxygen version 71 1420 REV D 11 Safe T Net 100 Operator s Manual SWITCH 8 Switch 8 controls the de activation of the alarm circuit when an alarm condition clears The left position is labeled LATCH ALM In this position you must manually reset the alarm circuit after the display reading falls below the preset alarm level The right position is labeled AUTO RST ALM In this position the alarm circuit automatically resets itself when the display reading falls below the preset alarm level Standard factory setting is to the left LATCH ALM for all versions except oxygen Standard factory setting is to the right AUTO RST ALM for the oxygen version Alarm Adjust Potentiometers Three adjustment potentiometers are on the right side of the main circuit board They are above and to the ri
33. n inside housing door and top left corner of main circuit board Frequent Frequent or false alarms but False readings due to 1 Increase the Alarm delay setting See the Adjusting the Alarms no change in zero reading Radio Frequency Alarm Delay section at the end of this chapter Interference RFI and or electrical noise jenuey s 10 210d0 001 12N 1 ejes j Oct L 4 22 4 1 Troubleshooting Continued Condition Symptom s Probable Cause s Recommended Action Incorrect Alarm Logic Audible and visual alarms and alarm relays do not operate as described in Chapter 2 Functional Description Alarm logic switch adjusted while power is on Bad circuitry 1 Adjust the alarm logic switch to your preferred alarm logic 2 Unplug or turn off the incoming power at the power source 3 Plug in or turn on the incoming power at the power source 4 If incorrect operation of the alarms or alarm relays continues contact Therrro Fisher Scientific for further instruction Accidental Disable Display reading is blinking Buzzer is silent Relays are disabled Alarm disable button marked CAL pressed 1 Press the RESET button to return to normal operation Safe T Net 100 Operator s Manual Adjusting the Alarm Levels Standard warn and alarm levels are shown in Chapter 6 Gas Detection To adjust the alarm levels
34. on The numbers are on the left side of the terminal strip and are numbered 1 through 12 amp ia 2 3 e d Relay Output BH Moe Connections E e lt 6 2 e m c Qo e 8 d e lt No 9 e m _10 o e AC Power g N Connection Q walle 2 e Figure 2 2 AC Power Strip TERMINALS 10 THROUGH 12 The bottom three 10 11 and 12 terminals AC LINE are for AC power connection see Figure 2 2 They are labeled H hot N neutral and G ground 71 1420 REV D 7 Safe T Net 100 Operator s Manual TERMINALS 1 THROUGH 9 The top nine 1 through 9 terminals are for relay output connections see Figure 2 2 The ALARM WARN and FAIL relay outputs each have the following terminals C common N C normally closed and N O normally open You may use the relay output terminals to connect external alarms or alarm responses The relay contacts are isolated single pole double throw SPDT contacts and are not fused Sensor Terminal Strip TB2 This 8 point terminal strip is on the lower right side of the main circuit board see Figure 2 1 Each terminal is labeled and numbered The labels are printed on the circuit board directly to the right of the terminal strip They describe each terminal s function The numbers are on the right side of the terminal strip and are numbered 8 through 1 from top
35. r but Seller agrees to assign to Buyer any warranty rights in such Product that Seller may have from the original manufacturer or third party supplier to the extent such assignment is allowed by such original manufacturer or third party supplier In no event shall Seller have any obligation to make repairs replacements or corrections required in whole or in part as the result of i normal wear and tear ii accident disaster or event of force majeure iii misuse fault or negligence of or by Buyer iv use of the Products in a manner for which they were not designed v causes external to the Products such as but not limited to power failure or electrical power surges vi improper storage and handling of the Products or vii use of the Products in combination with equipment or software not supplied by Seller If Seller determines that Products for which Buyer has requested warranty services are not Warranty Warranty covered by the warranty hereunder Buyer shall pay or reimburse Seller for all costs of investigating and responding to such request at Seller s then prevailing time and materials rates If Seller provides repair services or replacement parts that are not covered by the warranty provided in this warranty Buyer shall pay Seller therefor at Seller s then prevailing time and materials rates ANY INSTALLATION MAINTENANCE REPAIR SERVICE RELOCATION OR ALTERATION TO OR OF OR OTHER TAMPERING WITH THE PRODUCTS PERFORMED
36. re Low Battery 4 Check the continuity of the AC and BATTERY FUSES If necessary replace the fuse s as described in the following pages Check the condition of the batteries If necessary replace the batteries as described in the following pages If the condition continues contact Thermo Fisher Scientific for further instruction Sauosse2oy j Oct L 4 Table 5 2 Troubleshooting the DC Power Supply with Backup Battery Continued Condition Symptom s Probable Cause s Recommended Action No Power AC light on circuit No AC power 1 Check primary AC power source boardas Blown AC FUSE 2 Confirm that the incoming AC power connection is correct and secure 3 Check the continuity of the AC FUSE If necessary replace the fuse as described in the following pages 4 If the condition continues contact Therrro Fisher Scientific for further instruction Incorrect Output between the ncorrect battery 1 Confirm that the connection from the batteries to the Output terminals marked DC connection input terminal strip is correct and secure Voltage OUTPUT of the output Defective battery terminal strip or the y terminals marked BATTERY CONNECTION of the input terminal strip is not approximately 13 8 VDC Check the condition of the batteries If necessary replace the batteries as described in the following pages If the condition continues contact T
37. rom the battery wiring harness to the terminals on the batteries Connect the two red leads to the positive battery terminals connect the two black leads to the negative battery terminals 71 1420 REV D 35 Safe T Net 100 Operator s Manual 36 M 4 CAUTION Make sure the leads from the wiring harness are connected to the correct battery terminals An incorrect connection will destroy the battery fuse 11 Plug in or turn on the incoming AC power at the power source end 12 Make sure the Safe T Net 100 is operating from the primary power source AC power The AC light on the DC power supply with backup battery s circuit board and the PILOT indicator light on the Safe T Net 100 are both on when the Safe T Net 100 is operating from the primary power source 71 1420 REV D j Oct L 4 Troubleshooting The following table is a troubleshooting guide It describes the symptoms probable causes and recommended actions for problems you may encounter with this accessory Table 5 2 Troubleshooting the DC Power Supply with Backup Battery Condition Symptom s Probable Cause s Recommended Action Fault FAULT light on the Low AC power 1 Check primary AC power source m boardiis No AC power 2 Confirm that the incoming AC power connection is ee Blown AC FUSE correct and secure Blown BATTERY 3 Confirm that the connection from the batteries to the FUSE input terminal strip is correct and secu
38. sing measures 11 2 in 28 4 cm x 15 4 in 39 1 cm x 4 3 in 10 9 cm Two mounting holes are on the back of the housing near the top and two mounting holes are on the back of the housing near the bottom The housing has a total of eight knockouts for external connections A lock near the top of the housing door secures the housing door and locks it in place during normal operation A label on the inside of the housing door contains a general installation procedure and wiring diagram TRANSFORMER The transformer is near the upper left corner of the housing It converts the incoming AC power to DC power for operation of the backup battery and the 12 VDC output Two leads white and black extend from the left side of the transformer These leads are for connection to the incoming 115 VAC power source A grounding lug to the left of the transformer is to connect the ground wire of the AC power wire Two leads extend from the right side of the transformer These leads connect to the input terminal strip on the circuit board 71 1420 REV E 31 Safe T Net 100 Operator s Manual i 5 Lo a s 1 9 2 gt y E E c 26 Ga d q v 4 8 amp D PN ef S Y od dA c Nn aA P 3 ol t L p L Y N amp E Figure 5 1 DC Power Supply with Backup Battery 3
39. splay screen to your preferred setting 0 0 to 16 0 seconds Turn the delay adjust potentiometer clockwise to increase the setting turn the delay adjust potentiometer counterclockwise to decrease the setting 5 Push the warn alarm display button once to return to normal operation NY NOTE The Safe T Net 100 automatically returns to normal operation 30 seconds after you push CAL if you do not perform Step 5 6 Close and latch the housing door 71 1420 REV D 29 Safe T Net 100 Operator s Manual 30 71 1420 REV D ACCESSORIES Overview This chapter describes the Safe T Net 100 s accessories DC Power Supply with Backup Battery The DC power supply with backup battery provides nominal 12 VDC power to operate the Safe T Net 100 as a primary power source It requires 115 VAC power for operation In case of AC power failure it provides a backup power source to the Safe T Net 100 for up to 8 hours The DC power supply with backup battery is thermal and short circuit protected Thermo Fisher Scientific offers two versions of this optional accessory One version is UL listed and the other version is not listed Differences between the two versions are described within this section Description This section describes the housing and the internal components of the DC power supply with backup battery Internal components include the transformer the circuit board and the batteries see Figure 5 1 HOUSING The steel hou
40. strip other than the detector connections 5 Remove the mounting screws from the mounting feet or interior mounting slots at each corner of the Safe T Net 100 housing 6 Protect the Safe T Net 100 or any components of the Safe T Net 100 if you return it for repair 71 1420 REV E 23 Safe T Net 100 Operator s Manual 24 71 1420 REV D Chapter 4 MAINTENANCE Overview This Chapter describes corrective maintenance procedures for the Safe T Net 100 It includes a troubleshooting guide and procedures for adjusting the alarm levels and the alarm delay y WARNING Perform maintenance activities in a non hazardous environment 71 1420 REV D 25 0 1 14 Troubleshooting The following is a troubleshooting guide It describes the symptoms probable causes and recommended actions for problems you may encounter Table 4 1 Troubleshooting Condition Symptom s Probable Cause s Recommended Action No Power PILOT indicator light off ncorrect or 1 Verify correct connection at the power source incomplete power No reading on the display 2 Verify and correct if necessary the connections at screen terminals 10 11 and 12 of the AC power terminal strip AC power or terminals 3 and 4 of the sensor terminal strip DC power See Chapter 3 Installation 3 Check and replace if necessary the AC and DC fuses 4 Check ribbon cable connection to display scree
41. to bottom amp sensors 7 SENSOR 7 6 SENSO Detector Connections 0 SENSOR6 auan 4 12 0 3 DC Power Connection 92 2 BA I Recorder Output Connection 2 0 1 REC Figure 2 3 Sensor Terminal Strip TERMINALS 6 THROUGH 8 The top three terminals 6 7 and 8 are for wiring connections from the detector see Figure 2 3 They are labeled SENSOR 6 SENSOR 7 and SENSOR 8 TERMINAL 5 Terminal 5 is an additional wiring connection if you install the detector at a remote location see Figure 2 3 It is labeled GUARD 8 71 1420 REV D Functional Description TERMINALS 3 AND 4 Terminals 3 and 4 are for DC power connections see Figure 2 3 They are labeled 12BA terminal 4 and BA terminal 3 TERMINALS 1 AND 2 Terminals 1 and 2 are for recorder output connections see Figure 2 3 They are labeled REC terminal 2 and REC terminal 1 The output at these connections is 4 to 20 mA You can connect a recording or logging device to terminals 1 and 2 to record the Safe T Net 100 readings Alarm Relays K1 K2 K3 The alarm relays are to the right of the AC power terminal strip see Figure 2 1 The relays are from top to bottom alarm K1 warn K2 and fail K3 The applicable relay activates when the Safe T Net 100 is in a warn alarm or fail condition When the r
42. ttery non UL listed 49 8106 DC Power Supply with Backup Battery UL listed 52 0005 Alarm Horn 52 1016 Buzzer for DC Power Supply with Backup Battery 71 1300 Safe T Net 100 Quick Reference Card 71 1420 Safe T Net 100 Operator s Manual 71 1420 REV D 47 Safe T Net 100 Operator s Manual 48 71 1420 REV D
43. v v S 28 1 Unlatch and open the housing door Locate the warn alarm display button marked ADJ and the alarm adjust potentiometers marked WARN and ALRM The warn alarm display button is on the right side of the main circuit board and is to the left of the adapter card The alarm adjust potentiometers are directly below the warn alarm display button 2 Push the warn alarm display button ADJ once The current warn level is displayed on the display screen and the WARN light blinks NOTE The warn and alarm level and alarm delay are shown on the display screen for 30 seconds The Safe T Net 100 returns to normal operation if you do not continue the procedure in 30 seconds 3 Adjust the warn level on the display screen to your preferred warn level Turn the warn adjust potentiometer clockwise to increase the warn level turn the warn adjust potentiometer counterclockwise to decrease the warn level NOTE To return to normal operation push the warn alarm display button twice To adjust the alarm level continue with Step 4 4 Push the warn alarm display button The current alarm level is displayed on the display screen and the ALARM light blinks 5 Adjust the alarm level on the display screen to your preferred alarm level Turn the alarm adjust potentiometer clockwise to increase the alarm level turn the alarm adjust potentiometer counterclockwise to decrease the alarm level 6 Push the warn alarm display button
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