Installation and Operating Instructions
Contents
1. L lalalalsielrjote 6 718 9 CUSTOMER WIRING P ind WX E E P N 385 0075 041 24 VDC E fek sE mE mira 1 Pd Figure 2 4 2 Power Wiring 9 Installation TT INPUT VOLTAGE JUMPER SELECTION do INPUT VOLTAGE JUMPER SELECTION Z tron IV TN Point Level Control 2 6 Relay Wiring Refer to Figure 2 5 for the relay contact wiring The Z tron IV relay has double pole double throw DPDT dry contacts The relay serves as a switch and does not provide the power to operate an annunciator or other equipment All relay connections are made to the terminal strip on the electronic unit Refer to Figure 3 1 for the Fail Safe Selector Switch location High Level Fail Safe HIGH LEVEL FAIL SAFE HIGH LEVEL FAIL SAFE HLFS Switch Up High Level Fail Safe d d FWD HLFS I I 2 4 617 9 d 3 5 8 nn 200000009 REV LLFS LEVEL BELOW RED LED OFF EI EME N C N O N C N O NORMAL SENSING ELEMENT ALARM ALARM 41516171819 N C NORMALLY CLOSED HLFS Switch HIGH LEVEL FAIL SAFE N O NORMALLY OPEN Up High Level Fail Safe N N FWD HLFS L I 1 2 3 4 5 6 7 8 9 gp BagooDBDVBABB REV LLFS m EVEL2. It may be mounted either vertically or horizontally See Figures 2 1 and 2 2 Note The 700 0001 018 and 700 0001 022 are designed for vertical mounting only Avoid mounting closer than 1 inch to any tank structure Material bridging from structure to sensing element can cause false alarms Close proximity to tank structure also increases the sensing element s standing capacitance When installing flange mounted sensing elements keep mating surfaces and bolts free of paint and corrosion to ensure proper electrical contact with vessel Avoid using excessive amounts of TFE tape when installing threaded sensing elements Install systems with threaded process connections via wrench flats on the process connection only where available see fig 2 2 For probes without wrench flats a pipe wrench can be used in the area above the threads The recommended minimum Cote Shield length is to extend 2 into the vessel past the anticipated wall build up Consult factory before mounting the instrument with shorter Cote Shield lengths except when top mounted in 3 or larger diameter nozzles Protect the insulation on the sensing element against cuts and scrapes during installation Figure 2 3 provides typical mounting dimensions Z tron IV Point Level Control 2 2 Mounting the Level Control continued Best Cot
3. 1 215 674 2731 E mail drexelbrook info 9 ametek com Website www drexelbrook com
4. 14 Operation 3 4 Failsafe Failsafe describes the level condition which causes the output relay to de energize and determines the condition of the relay upon loss of power or upon the failure of most components The failsafe mode may be selected in the field by changing the position of the right slide switch located on the top of the instrument See Figure 3 1 High Level Failsafe HLFS means the relay will de energize when level is high indicating high level upon loss of power N O contacts open N C contacts closed Low Level Failsafe LLFS means the relay will de energize when level is low indicating low level upon loss of power N O contacts open N C contacts closed The instrument is supplied in the failsafe mode that is requested when the order is placed If none specified it will be shipped as High Level Failsafe HLFS Selecting Failsafe with the Right Slide Switch High Level Failsafe HLFS Right Switch is up Low Level Failsafe LLFS Right Switch is down 3 5 Start up Be sure the power wiring and voltage are correct Improper wiring may cause permanent damage personal injury and void the factory warranty See Section 2 5 15 Section 4 Calibration Section 4 Calibration A A This section contains the calibration information for the Z tron IV Level Control CAUTION Do not open enclosure cover without verifying area is non hazardous or make break any el
5. malfunction Shorted sensor Water in housing or conduit Severe coating build up on sensing element LLFS Sensing element not seeing material HLFS due to fill angle Improper wiring Improper calibration Electronic unit malfunction Improper wiring Insufficient signal from sensing element Setpoint is beyond the tuning range of the electronics Electronic unit malfunction Sensor covered with conducting material Improper calibration Loose wiring Electronic unit malfunction Time delay required Intermittent short of sensor Improper calibration Loose wiring Electronic unit malfunction Dielectric k of material 1s too low 26 Need longer Cote Shield Consult factory Need longer insertion length Consult factory See Section 5 3 See Section 5 3 Check power wiring See Figure 2 4 f See Section 2 5 g See Section 4 See Section 5 2 See Section 5 3 Consult factory Need longer Cote Shield Consult factory Need longer insertion length Consult factory See Section 2 See Section 4 See Section 5 2 See Section 2 Need longer insertion length Consult factory Consult factory See Section 5 2 See Section 4 See Section 2 See Section 5 2 i Consult factory See Section 5 3 See Section 4 See Section 2 See Section 5 2 Need high sensi
6. 27 Z tron IV Point Level Control 5 10 Equipment Return In order to provide the best service any equipment being returned for repair or credit must be pre approved by the factory In many applications sensing elements are exposed to hazardous materials OSHA mandates that our employees be informed and protected from hazardous chemicals Material Safety Data Sheets MSDS listing the hazardous materials to which the sensing element has been exposed MUST accompany any repair It is your responsibility to fully disclose all chemicals and decontaminate the sensing element Service department at 1 800 527 6297 US and Canada or 215 674 1234 International e To obtain a return authorization RAF contact the Please provide the following information Model Number of Return Equipment Serial Number Original Purchase Order Number Process Materials to which the equipment has been exposed MSDS sheets for any hazardous materials Billing Address Shipping Address Purchase Order Number for Repairs Please include a purchase order even if the repair is under warranty If repair is covered under warranty you will not be charged Ship equipment freight prepaid to AMETEK DREXELBROOK 205 KEITH VALLEY ROAD HORSHAM PA 19044 1499 COD shipments will not be accepted 28 Specifications Section 6 Specifications Power Requirements AC Units Field Adjustable 95 145 VAC 50 60 Hz 2 Watt 215 265 VAC 50 60 Hz 2 Wa
7. changed Cable Sensing Elements can only be shortened Instructions are included with each unit NOTE Cote Shield element must NEVER be modified Insulators Insertion Length Center Rod CE Note Any changes to probe length after calibration requires re calibration to ensure proper operation The Need Sometimes your application calls for probe lengths other than the standard 18 inch or longer insertion lengths supplied Shortening the sensing element is quite simple and can be done in the field Lengthening the sensing element however is more difficult because the metal rod typically 316 SS must be welded Before making any Adjustments 1 Read the following instructions thoroughly 2 Remove power 3 Disconnect the electronics 4 Protect electronics from any static discharge 5 Protect electronics from any heat Shortening The bare metal center rod of the sensing element can be shortened with a hacksaw Be careful not to cut either of the two insulators See Figure on this page In applications using conductive or water based materials shortening is not a problem Leave a minimum bare metal center rod length of two 2 inches For dry granular materials such as powder sand corn clinker etc you must leave a minimum bare metal center rod length of eight 8 inches Consult the factory before shortening beyond this point Lengthening To lengthen the sensing element an
8. condition Turn setpoint adjustment slowly clockwise CW until the relay just operates red LED off Turn setpoint adjustment an additional 4 turn CW Red LED will remain off Calibration 1s complete Optimal Calibration a b c d Be sure the material level is well below the sensing element See Figure 4 1 Turn the setpoint adjustment counterclockwise CCW until the red LED 1s on red LED on indicates that the relay 1s de energized and the unit is in the alarm condition Turn setpoint adjustment slowly clockwise CW until the relay just operates red LED off Increase the material level until it is well above the sensing element See Figure 4 2 LED changes state Note the position of the screwdriver Counting the number of turns turn the setpoint adjustment slowly clockwise CW until the relay once again just operates If less than one turn of the adjustment was observed between the sensing element covered and uncovered the sensor is not generating enough signal Consult the factory for further options g Turn the adjustment back counterclockwise CCW one half the number of turns that were counted h Record number of turns and save for future i calibration reference Calibration is now complete 18 Calibration 4 3 Calibration in Insulating Material Vertical Mount E NOTICE ES Level Below Horizontal D Figure 4 1 Sensing Element The following procedure
9. extension rod can be welded onto the end of the bare metal center rod Make sure that the extension rod is the same metal as the sensing element Disconnect electronics before welding An alternate option is to add a pipe coupling and a section of metal pipe or rod after threading the tip of the sensing element In this case the metal pipe need not be identical to the metal of the sensing element A 1 Form 440 0001 001 3 1 2006 TERMS AND CONDITIONS OF SALE GENERAL ALL ORDERS ARE SUBJECT TO THE FOLLOWING TERMS AND CONDITIONS ANY ACCEPTANCE OF ANY OFFER OF BUYER FOR ANY GOODS OR SERVICES IS CONDITIONED UPON THESE TERMS AND CONDITIONS AND SELLER OBJECTS TO ANY ADDITIONAL OR DIFFERENT TERMS PROPOSED BY BUYER IN ANY DOCUMENT WHICH SHALL NOT BE BINDING UPON SELLER No salesman or other party is authorized to bind the AMETEK DREXELBROOK Division of AMETEK Inc hereinafter Seller by any agreement warranty statement promise or understanding not herein expressed and no modifications shall be binding on Seller unless the same are in writing and signed by an executive officer of Seller or his or her duly authorized representative Verbal orders shall not be executed until written notification has been received and acknowledged by Seller QUOTATIONS Written quotations are valid for thirty 30 days unless otherwise stated Verbal quotations expire the same day they are made PRICES All prices and terms are subject to change without not
10. output due to agitation or waves in the vessel CAUTION THIS adjustment is a 270 4 turn potentiometer Do not turn it beyond its mechanical stops or damage to unit may occur The unit is shipped with the Time Delay set to zero 0 seconds Using a small screwdriver turn the adjustment clockwise to set anywhere from 0 to 60 seconds If the unit is waiting for a change in its alarm state the alarm LED is blinking and the blinking period is equal to one second One second period helps to accurately adjust time delay potentiometer to desirable value without necessity of using a stopwatch When the alarm LED is blinking it uses one of two possible blinking modes See Time Delay Action for definition of modes 3 3 Time Delay Action Time delay action describes whether the relay contacts are delayed from going into the alarm state or recovering from an alarm state FWD Forward acting delays the system from coming OUT of alarm Long blinking mode 0 9 second on and 0 1 second off REV Reverse acting delays the system from going INTO alarm Short blinking mode 0 1 second on and 0 9 second off The instrument is supplied with the time delay action set in the forward mode position The time delay action may be selected in the field using the left slide switch located on the top of the instrument See Figure 3 1 Selecting Time Delay with Slide Switch Forward Acting Left Switch UP Reverse Acting Left Switch Down
11. the form of action whether in contract tort or otherwise and further shall extend to the benefit of Sellers vendors appointed distributors and other authorized resellers as third party beneficiaries PROHIBITION FOR HAZARDOUS USE Goods sold hereunder generally are not intended for application in and shall not be used by Buyer in the construction or operation of a nuclear installation or in connection with the use or handling of nuclear material or for any hazardous activity or critical application where failure of a single component could cause substantial harm to persons or property unless the goods have been specifically approved for such a use or application Seller disclaims all liability for any loss or damage resulting from such unauthorized use and Buyer shall defend indemnify and hold harmless the Seller against any such liability whether as a result of breach of contract warranty tort regardless of the degree of fault or negligence strict liability or otherwise EXPORT CONTROL Buyer shall comply with all export control laws and regulations of the United States and all sales hereunder are subject to those laws and regulations Seller shall not be named as shipper or exporter of record for any goods sold hereunder unless specifically agreed to in writing by Seller At Seller s request Buyer shall furnish Seller with end use and end user information to determine export license applicability Buyer warrants in accordance with U
12. 1s for high level fail safe If the unit is set for low level fail safe LED operation will be opposite 1 2 3 4 5 6 7 8 Be sure the material level is well below the sensing element See Figure 4 1 Turn the setpoint adjustment counterclockwise CCW until the red LED 1s on red LED on indicates that the relay 1s de energized and the unit is in the alarm condition Turn setpoint adjustment slowly clockwise CW until the relay just operates red LED off Raise the level to a point on the active section of the sensing element where control is desired Red LED should be on See Figure 4 3 Counting the number of turns turn the setpoint adjustment clockwise CW until the red LED just turns off If less than turn is required consult factory Turn setpoint adjustment slowly counterclockwise CCW until the relay just operates red LED on Calibration 1s complete If dielectric constant or conductivity of material changes point of operation may change Consult factory DESIRED CONTROL ls POINT m 8 jff Figure 4 2 Figure 4 3 Level Above Horizontal Level Covering Vertical Sensing Element Sensing Element 19 Section 5 Troubleshooting Section 5 Troubleshooting 5 1 Introduction The Z tron IV Level Control is a solid state device with no moving parts other than its relays and requires no maintenance or adjustments The units are designed to give years of unatt
13. ABOVE RED LED ON SENSING ELEMENT C ALARM TANK FULL Low Level Fail Safe LOW LEVEL FAIL SAFE LLFS Switch Down Low Level Fail Safe N N FWD HLFS eeng LI LOW LEVEL FAIL SAFE 1 2 3 4 5 6 7 8 9 gl REV LLFS EVEL BELOW RED LED ON n E E N C N O N C N O C ALARM SENSING ELEMENT ALARM ALARM SOS SCC SC XC TANK EMPTY T T 4 5 6 7 8 9 N C NORMALLY CLOSED LLFS Switch LOW LEVEL FAIL SAFE vn NORMALLY OPEN OOOO Down Low Level Fail Safe d d P FWD HLFS b OS LI 1 2 3 4 5 6 7 8 9 af aaa a aa anan I I REV LLFS EVEL ABOVE RED LED OFF NORMAL SENSING ELEMENT TANK FULL Figure 2 5 Relay Wiring 10 Installation 2 7 Wiring the Sensing Element Remote If the Ztron electronic unit is mounted remotely from the sensing element the cable connections from the sensing element to the electronic unit are made to the individual terminals on the side opposite the terminal strips See Figure 2 6 2 7 NOTICE NOTE m It is important that the sensing element cable is mechanically separated from the power wiring When installing remote mount electronics you must use the Drexelbrook supplied coaxial cable The cable can be a maximum of 50 feet 22 8 meters Termination kits are av
14. AMETEK DREXELBROOK eader in Level Measurement For Assistance Call 1 800 527 6297 tside North Ameri 215 674 1234 Installation and Operating Instructions Z tron IV M Point Level Control U S and Canada 24 Hour Service International Fax E mail Website 1 800 553 9092 1 800 527 6297 1 215 674 1234 1 215 674 2731 drexelbrook service ametek com www drexelbrook com AMETEK Drexelbrook makes no warranty of any kind with regard to the material contained in this manual including but not limited to implied warranties or fitness for a particular purpose Drexelbrook shall not be liable for errors contained herein or for incidental or consequential damages in connection with the performance or use of material Copyright AMETEK Drexelbrook EDO 1 14 131 Z tronIV LM Issue 3 Z tron IV M Point Level Control AMETEK DREXELBROOK An ISO 9001 Certified Company 205 Keith Valley Road Horsham PA 19044 U S and Canada 1 800 553 9092 24 Hour Service 1 800 527 6297 International 1 215 674 1234 Fax 1 215 674 2731 E mail drexelbrook info 9 ametek com Website www drexelbrook com Table of Contents Contents Section 1 IntrodUctlon iuuenis siis nap sms i n 1 IAN AA aaa aAa 1 Eeer 1 13 Spare EEN 1 UE Model DIW SY eege 2 Section 2 Istoric 3 A UNPACKING EE 3 2 2 Mounting the Level Control eau ranni setan kd amande ase ans y nri nein nha k sis enan eke pik 3 2 3 Inte
15. E 755 700 0029 002 2 psi 500 F 316 SS and TFE 756 700 0029 003 2 psi 500 F 316 SS and TFE 757 700 0029 004 2 psi 500 F 316 SS and TFE 758 700 0029 005 2 psi 500 F 316 SS and TFE 760 700 0029 021 2 psi 500 F 316 SS and TFE 761 700 0029 022 2 psi 500 F 316 SS and TFE 762 700 0029 023 2 psi 500 F 316 SS and TFE 763 700 0029 024 2 psi 500 F 316 SS and TFE 764 700 0029 025 2 psi 500 F 316 SS and TFE 766 700 0029 102 2 psi 1500 F 316 SS and Alumina 767 700 0029 103 2 psi 1500 F 316 SS and Alumina 768 700 0029 104 2 psi 1500 F 316 SS and Alumina 769 700 0029 105 2 psi Q 1500 F 316 SS and Alumina 770 700 0029 106 2 psi 1500 F 316 SS and Alumina Process gland wetted part X B 316 316LSS P PFA 700 0001 018 X Upon request Process connection XX A0 3 4 NPT BO 1 NPT BA 1 150 RF Carbon Steel BB 1 1504 RF 316 316L Stainless Steel CA 1 300 RF Carbon Steel CB 1 300 RF 316 316L Stainless Steel FA 2 150 RF Carbon Steel FB 2 1504 RF 316 316L Stainless Steel GA 2 300 RF Carbon Steel GB 2 3004 RF 316 316L Stainless Steel IA 3 1504 RF Carbon Steel IB 3 1504 RF 316 316L Stainless Steel JA 3 300 RF Carbon Steel JB 3 300 RF 316 316L Stainless Steel KA 4 150 RF Carbon Steel KB 4 1504 RF 316 316L Stainless Steel LA 4 300 RF Carbon Steel LB 4 3004 RF 316 316L Stainless Steel XX Many more options available upon request ASME ANSI DIN Insertion Length in mm XXXXXX Length of t
16. S Export Law that goods sold hereunder shall not be destined for facilities or activities involving nuclear chemical or biological weapons or related missile delivery systems in named prohibited regions or countries GOVERNING LAW Seller intends to comply with all laws applicable to its performance under any order All matters relating to interpretation and effect of these terms and any authorized changes modifications or amendments thereto shall be governed by the laws of the Commonwealth of Pennsylvania No government contract regulations or clauses shall apply to the goods or services this agreement or act to bind Seller unless specifically agreed to by Seller in writing NON WAIVER BY SELLER Waiver by Seller of a breach of any of these terms and conditions shall not be construed as a waiver of any other breach SEVERABILITY AND ENTIRE AGREEMENT If any provision of these terms and conditions is unenforceable the remaining terms shall nonetheless continue in full force and effect This writing together with any other terms and conditions Seller specifically agrees to in writing constitutes the entire terms and conditions of sale between Buyer and Seller and supercedes any and all prior discussions and negotiations on its subject matter AMETEK DREXELBROOK An ISO 9001 Certified Company 205 Keith Valley Road Horsham PA 19044 U S and Canada 1 800 553 9092 24 Hour Service 1 800 527 6297 International 1 215 674 1234 Fax
17. Seller the obligations of Seller set forth above shall not apply to goods made by Seller using such specifications or designs and Buyer shall defend indemnify and hold Seller harmless against any third party claims for infringement which arise out of Seller s use of specifications or designs furnished by Buyer SOFTWARE LICENSE If goods purchased hereunder include software Software Buyer may use the Software only as part of the goods Buyer may not use copy or transfer any of the Software except as may be permitted under the applicable License Agreement provided with the goods Buyer s right to use copy or transfer the Software shall terminate upon termination of Buyer s right to use the goods PACKAGING WEIGHTS AND DIMENSIONS Buyer specified packing or marking may be subject to additional charges not otherwise included in the price of the goods Published weights and dimensions are estimates or approximate only and are not warranted FORCE MAJEURE Seller shall not be responsible for delays in delivery or any failure to deliver due to causes beyond Seller s control including but not limited to the following items acts of God war terrorism mobilization civil commotion riots embargoes domestic or foreign governmental regulations or orders governmental priorities port congestion acts of the Buyer its agents or employees fires floods strikes lockouts and other labor difficulties shortages of or inability to obtain shipping sp
18. TH Y DIMENSIONS ARE IN INCHES mm Figure 2 3 1 Mounting Dimensions Z tron IV TN Point Level Control 2 4 Remote Mounting Dimensions REMOTE ELECTRONICS 4 41 DIA 112 SENSING ELEMENT 4 81 t I 1 25 IM 32 III 3 4 NPT ENTRIES EK 2 94 59 75 DEPENDENT I UPON SENSING y ELEMENT I i i MOUNTING HOLES FOR 1 4 DIA HARDWARE A CSL 2 a 51 ro INSERTION HOUSING MOUNTING DIMENSIONS FT us DIMENSIONS ARE IN INCHES mm Figure 2 3 2 Mounting Dimensions 2 5 Power Wiring NOTICE m EK Installation CAUTION Do not make break any electrical connections without first disconnecting electrical power at the source Ensure that wiring electrical fittings and conduit connections conform to the electrical codes for the specific location The Z tron IV level control is a general purpose device and is not agency approved for use in hazardous locations If agency approval is required contact your local AMETEK Drexelbrook representative or call 1 800 553 9092 Refer to Figures 2 4 1 and 2 4 2 for the appropriate power wiring and use the following procedure to wire the Z tron IV level control 1 Ensure that all power to the wiring is off 2 Remove the cover 3 The power connections are made to terminals 1 2 and 3 on
19. ace or transportation inability to secure fuel supplies or power at current prices or on account of shortages thereof or due to limitations imposed by the extent of availability of Seller s normal manufacturing facilities If a delay excused per the above extends for more than ninety 90 days and the parties have not agreed upon a revised basis for continuing providing the goods or services at the end of the delay including adjustment of the price then Buyer upon thirty 30 days prior written notice to Seller may terminate the Order with respect to the unexecuted portion of the goods or services whereupon Buyer shall promptly pay Seller its reasonable termination charges upon submission of Seller s invoices thereof LIMITATION OF LIABILITY Seller s liability for any claim of any kind except infringement of intellectual property rights shall not exceed the purchase price of any goods or services which give rise to the claim SELLER SHALL IN NO EVENT BE LIABLE FOR BUYER S MANUFACTURING COSTS LOST PROFITS LOSS OF USE OF THE GOODS OR SERVICES COST OF CAPITAL COST OF SUBSTITUTE GOODS FACILITIES SERVICES OR REPLACEMENT POWER DOWNTIME COSTS CLAIMS OF BUYER S CUSTOMERS FOR DAMAGES OR OTHER SPECIAL PROXIMATE INCIDENTAL INDIRECT EXEMPLARY OR CONSEQUENTIAL DAMAGES Any action against Seller must be brought within eighteen 18 months after the cause of action accrues These disclaimers and limitations of liability shall apply regardless of
20. ailable to shorten the cable if necessary GREEN BLUE Drexelbrook Coaxial General Purpose GP Three Terminal Cable CENTER WIRE CENTER WIRE BLUE BLUE SHIELD WIRE RED TO BE CUT BY GROUND WIRE GROUND WIRE FIELD INSTALLER GREEN GREEN SHIELD WIRE RED TVVO TERMINAL THREE TERMINAL SENSING ELEMENT SENSING ELEMENT Figure 2 6 Wiring the Remote Sensing Element 11 Z tron IV TN Point Level Control 2 8 Wiring the Sensing Element Integral NOTE It is important that the sensing element cable is Mechanically separated from the power wiring CENTER WIRE BLUE SHIELD WIRE RED PROBE THREE TERMINAL SENSING ELEMENT PROBE BLUE SHIELD BLUE RED INTERCONNECT CABLE SHIELD PROBE PROBE RED BLUE BLUE LID COTE SHIELD y TAB RED HERES TERMINAL BLOCK FOR POWER amp RELAYS BLOCK n FOR SENSING ELEMENT Z TRON IV ELECTRONIC UNIT HOLD DOWN SCREWS POWDER COATED LUMINUM HOUSING 3 4 NPT CABLE ENTRY 3 4 NPT BOTTOM HUB TWO TERMINAL SENSING ELEMENT Figure 2 7 Wiring the Integral Sensing Element 12 Operation Section 3 Operation This section describes the operating switches of the Z tron IV level control Remove the dome lid and use a small screwdriver to set the operating controls The green LED on indicates power is applied to the unit 3 1 Setpoint Control There is a single operating point ad
21. ar from the date of invoice B Software and Firmware Unless otherwise specified Seller warrants for a period of one 1 year from date of invoice that standard software or firmware when used with Seller specified hardware shall perform in accordance with Seller s published specifications Seller makes no representation or warranty expressed or implied that the operation of the software or firmware shall be uninterrupted or error free or that functions contained therein shall meet or satisfy the Buyer s intended use or requirements C Services Seller warrants that services including engineering and custom application whether provided on a fixed cost or time and material basis shall be performed in accordance with generally accepted industry practices D Remedies Seller s liability under this section is restricted to replacing repairing or issuing credit at Seller s option for any returned goods and only under the following conditions 1 Seller must be promptly notified in writing as soon as possible after the defects have been noted by the Buyer but not later than 1 year from date of invoice from Seller 2 The defective goods are to be returned to the place of manufacture shipping charges prepaid by the Buyer 3 Seller s inspection shall disclose to its satisfaction that the goods were defective in materials or workmanship at the time of shipment 4 Any warranty service consisting of time travel and expenses related to suc
22. ble center wire and ground wire Measure resistance as shown 11 Move ohmmeter leads and repeat for all measurements shown iii If resistance is less than 100 k ohms cable has failed B Check for continuity i Short center wire to ground wire and measure resistance as shown Should be close to 0 ohms 11 Short center wire to shield and repeat 111 If resistance is greater than 10 ohms cable has failed OHMMETER ZON 3 p SHORT OUT TWO CONDUCTORS ge ee CENTER GROUND 797 OHMS CENTER SHIELD 2 OHMS SHIELD GROUND 0 OHMS p e SHORTED WIRES SHOULD READ 0 OHMS N gen op CHECR FOR CONTINUITY OHMMETER Pob SE 0 CENTER GROUND eo OHMS CENTER SHIELD 2 OHMS SHIELD GROUND e OHMS CORRECT READING OPEN CIRCUIT LM pr NO CONNECTION CHECK FOR SHORTS Figure 5 4 Testing Remote Cable 25 Z tron IV Point Level Control 5 6 Possible Problems and Causes 1 Instrument indicates alarm at all times Instrument never indicates alarm Instrument can t be calibrated Instrument gives a false alarm Instrument operates intermittently Severe coating build on sensing element HLFS Sensing element not seeing material LLFS due to fill angle Sensing element cable damaged Defect in sensing element Loss of power Improper relay wiring Improper calibration Electronic unit
23. e shield must Wall build up extend through does not extend mm nozzle and wall past first un build up by 2 insulator Best No Nozzle HB Wrong Nozzle too long FEN lt Cote shield too short L Good Eg Nozze Long Nozzle wall Factory supplied Cote shield extends through nozzle and wall build up Figure 2 1 Z tron IV Level Control Mounting Recommendations All Connections Sealed a and Gaskets In Place 100000000 AMETEIC od AMETEK DREXELBROOK o CONDULET T Packing er WRONG CORRECT E Gland Hold here when E Assembly E tightening Conduit Do Not Condulet Breather 4 Disturb Drain Hold here to install or remove Sensing Element from Vessel A Ja dee ex A A V DAN o 7 Es WRONG CORRECT Figure 2 2 Z tron IV Level Control Installation Guidelines Installation Integral Mounting Dimensions 2 3 4 41 DIA a Lei 112 I I 2 88 73 3 4 NPT CABLE ENTRY 3 63 DEPENDENT 92 UPON ENS ING ELEMENT I 1 NPT ET MOUNT ING A CSL OPTIONA FLANGE Z6 MOUNT ING INSERTION I LENG
24. ectrical connections without first disconnecting electrical power at the source Ensure that wiring electrical fittings and conduit connections conform to the electrical codes for the specific location The Z tron IV level control is a general purpose device and is not agency approved for use in hazardous locations If agency approval is required contact your local AMETEK Drexelbrook representative or call 1 800 553 909 4 1 Calibration in Conducting Material NOTICE mm All Z tron IV controls are factory set to switch in conductive materials setpoint adjustment 1s set to full clockwise CW position No calibration adjustment 1s necessary If this instrument had been previously adjusted for use in a insulating materials and is now intended for use in a conducting material use a small screwdriver to turn the setpoint adjustment to the full clockwise CW position No other adjustment 1s necessary 17 Z tron IV Point Level Control 4 2 Calibration in Insulating Material Horizontal Mount NOTICE mma The following procedure 1s for high level fail safe If the unit is set for low level fail safe LED operation will be opposite 1 Quick Calibration 2 a b c d e Be sure the material level is well below the sensing element See Figure 4 1 Turn the setpoint adjustment counterclockwise CCW until the red LED 1s on red LED on indicates that the relay 1s de energized and the unit is in the alarm
25. el Control 1 4 Model Number Technology Z4 Z tron IV RF Admittance Level Measurement System Input Power 1 24VDC 2 115VAC Field Selectable 3 230VAC Field Selectable Electronics D Integral No Cable 6 Remote w 25Ft Gp Cable C Remote w 5FtHi Temp Cable Remote w 75FtHi Temp Comp Cable 1 Remote wi Out Cable 7 Remote w 35Ft Gp Cable D Remote w 10 Ft Hi Temp Cable J Remote w 100 Ft Hi Temp Comp Cable 2 Remote w 5Ft Gp Cable 8 Remote w 50 Ft Gp Cable E Remote w 15Ft Hi Temp Comp Cable K Remote w 150 Ft Hi Temp Comp Cable 3 Remote w 10FtGpCable 9 Remote w 75Ft Gp Cable F Remote wi 20 Ft Hi Temp Comp Cable 4 Remote w 15FtGpCable A Remote w 100FtGp Cable G Remote w 25 Ft Hi Temp Comp Cable 5 Remote w 20FtGpCable B Remote w 150FtGp Cable H Remote wi 50 Ft Hi Temp Comp Cable OEM Code Series 1 Standard 2 China Sensing Element temperatures gt 300 F require a 6 cooling extension Model Press amp Temp Wetted Parts 101 700 1202 001 200 psi 450 F 316 SS and PEEK 103 700 1202 014 200 psi 450 F 316 SS and PEEK 106 700 1202 041 1000 psi E 250 F 300 psi O 450 F 316 SS and PEEK 301 700 0001 022 1000 psi 100 F 500 psi 300 F 316 SS and TFE 325 700 1202 031 200 psi 450 F 316 SS and PEEK FDA approved 327 700 0202 002 50 psi 300 F 20 psi 450 F 316 SS and TFE 701 700 0001 018 50 psi 300 F PFA 753 700 0206 101 200 psi 250 F 316 SS and PEEK 754 700 0029 001 2 psi 500 F 316 SS and TF
26. electric unit has failed 21 Z tron IV Point Level Control 5 3 Testing Sensing Element With level below the sensing element 1 Disconnect remote cable if applicable 2 Use an analog ohmmeter that is set to the R x 1K ohm scale Measure the resistances between each pair of sensing element connections See Figure 5 1 Record values in Table a If the process material is conductive it is normal to measure some resistance between sensing element connections The lowest permissible resistance values are Center Conductor to Housing 1500 ohms Center Conductor to Cote Shield 750 ohms Cote Shield to Housing 750 ohms 3 Clean sensing element and repeat resistance measurements with the sensing element external to the vessel a b A clean sensing element should measure an open circuit on all resistance tests If resistance values increase to an open circuit the resistance was installation or coating related The most common causes are i Cote Shield element does not extend sufficiently into the vessel Verify the CoteShield element extends at least 2 into the vessel and past wall build up ii Extremely conductive coating on the sensing element This may require changing the sensing element or electronics Contact the factory for recommendations 111 Sensing element is touching vessel A resistance reading of less than 10 ohms to ground sensing element housing or tank is usually due to a metal t
27. ended service A spare electronic chassis is recommended for every 10 units so that in case of a failed unit a critical application will not be delayed while the unit 1s returned to the factory for repair Use the following troubleshooting procedures to check out the Z tron IV Level Control If attempts to locate the difficulty fail notify your local Drexelbrook representative or call the factory direct at 1 800 527 6297 US and Canada or 1 215 674 1234 International 5 2 Testing Electronic Unit It is recommended to begin with Electronic Unit 1 Verify that green LED is illuminated and the proper voltage is applied to the electronic unit 2 Change fail safe selector switch Fig 3 1 Ifred LED and relay do not change states electronic unit has failed 3 On the back of the electronics unit side opposite power connections remove the probe wires from under the blue amp red screws 4 With the instrument in High Level Fail Safe turn the setpoint adjustment counterclockwise CCW until the red LED is on red LED on indicates that the relay is deenergized and the unit is in the alarm condition 5 Turn setpoint adjustment slowly clockwise CW until the relay just operates red LED off 6 Rotate setpoint adjustment back and forth about this point observing travel of screwdriver between relay pull in and relay drop out If properly operating screwdriver should travel less than 4 turn to operate the relay If not
28. entation or other materials to Buyer shall not transfer any intellectual property rights to Buyer unless Seller specifically agrees to do so in writing Seller shall retain ownership of all applicable patents trademarks copyrights and other intellectual property rights Buyer shall not use copy or transfer any such items in violation of Seller s intellectual property rights or applicable law or for any purposes other than that for which the items were furnished Seller shall defend any lawsuit brought against the Buyer based on a claim that the design or construction of the goods sold hereunder by Seller infringe any United States or Canadian Patent Copyright or Mask Work Registration provided that Buyer promptly notifies Seller of such claim in writing and further provided that at Seller s expense 1 Buyer gives Seller the sole right to defend or control the defense of the suit or proceeding including settlement and 2 Buyer provides all necessary information and assistance for that defense In the event of a charge of infringement Seller s obligation under the agreement shall be fulfilled if Seller at its option and expense either i settles such claim ii procures for Buyer the right to continue using such goods iii replaces or modifies goods to avoid infringement or iv accepts the return of any infringing goods and refunds their purchase price or iv defends against such claim If Buyer furnishes specifications or designs to
29. gral Mounting DIMENSIONS sise vot sidiki kita hr ea lak nnns nid iaa 5 2 4 Remote Mounting DIMENSIONS ccccccceteeeeeeeeeeeeeeeeeeeeeeesesesseeeeeeeeeeeeeenes 6 2 5 POWOF VUNG k kwak disid asa tj td a ra ks a kaka kk ak e na anka kak a bu ran E RR Ru 7 20 EENAA EEE E EE EE 10 2 7 Wiring the Sensing Element Remote eese 11 2 8 Wiring the Sensing Element Integral un 12 Section 3 Oper ari 13 GO oo luu A AA 13 32 Te Delay COMTOl ui eege 14 9 3 A Prio NR en 14 3 4 PANS ies 15 35 Ola UN ronda 15 Section 4 Canbratlon somiat tmb 17 4 1 Calibration in Conducting Material cacon 17 4 2 Calibration in Insulating Material Horizontal Mount 18 4 3 Calibration in Insulating Material Vertical Mount 19 Section 5 Troubleshooting iris anch ituri aca noxa aa ais koki kane kk ik kote aw Ria 21 El ur ee YO A E E E E EN 21 52 Testing Ree EE 21 53 A os AAA ne 22 5 4 Testing Relay COU E 24 55 Testing Remote E 25 5 6 Possible Problems and GAUS S iia b s koke kap Eege ege 26 5 7 Factory AS EE 27 5 8 Field Service EE 27 59 CUSIOME eR E S 27 210 Equibrent E Meet 28 Section 6 SpeciticaloNS aiii is 29 Appendix A Shortening or Lengthening the Sensing Element 1 Section 1 Section 1 1 1 Figure 1 1 Capacitance Probe Insulating Media 1 2 Technolo
30. gy IDENTICAL VOLTAGE WAVE FORMS GA Uses RF signal to L fan overcome KA 8 limitations INSULATORS D Of ASAS Capacitance NO CURRENT FLOW HERE IDENTICAL VOLTAGE ei ds AMPLIFIER CURRENT FLOWS HERE BUT NOT MEASURED CURRENT FLOWS THRU LEVEL EQUIVALENT CIRCUIT Figure 1 2 RF Admittance Probe with Cote Shield 1 3 Spare Parts Introduction Introduction These instructions are for the AMETEK Drexelbrook Z tron IV Series Point Level Control The label on top of the electronic unit identifies the model number of the Z tron IV level control System Description Cote Shield action is designed into all Z tron IV level controls and enables the instrument to ignore the effect of buildup or material coating on the sensing element The electronic unit e Provides double pole double throw dry relay contact closure when material reaches a specific point on the sensor The relay contacts may be used to operate alarms solenoid valves or other low power devices Provides a 0 60 second time delay for agitated vessels The 700 series sensing element Is mounted on the tank or in the process Provides a change in radio frequency RF admittance indicating presence or absence of material In a simple capacitance probe type sensing element when the level rises and material covers the probe the capacitance within the circuit between the probe and the medium conductive applica
31. h services performed other than at Seller s factory shall be at Buyer s expense E Repaired Reconditioned Goods As to out of warranty goods which Seller has repaired or reconditioned Seller warrants for a period of sixty 60 days from date of its invoice only new components replaced in the most recent repair reconditioning F Returns and Adjustments No goods may be returned unless authorized in advance by Seller and then only upon such conditions to which Seller may agree Buyer must obtain an RMA Return Material Authorization number from Seller prior to any return shipment and such RMA number must appear on the shipping label and packing slip Buyer shall be responsible for the returned goods until such time as Seller receives the same at its plant and for all charges for packing inspection shipping transportation or insurance associated with returned goods In the event that credit for returned goods is granted it shall be at the lesser of the then current prices or the original purchase price Claims for shortage or incorrect material must be made within five 5 days after receipt of shipment ALL OTHER WARRANTIES FOR ANY OF SELLER S GOODS OR SERVICES WHETHER ORAL WRITTEN EXPRESS IMPLIED STATUTORY OR OTHERWISE INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR PURPOSE ARE EXCLUDED AMETEK DREXELBROOK INTELLECTUAL PROPERTY Seller s sale of goods or provision of related docum
32. he probe in millimeters from process connection to the bottom of the probe Cote Shield Length in mm XXXXXX Length of the Cote Shield in millimeters for 3 terminal probes Not applicable for 2 terminal probes Inactive Length in mm XXXXXX Length of the inactive part of the probe that is not measured This option is primarily used in Interface measurement and Desalters Inactive Material B 316 316L SS N Not Applicable X Many more options are available upon request Y Y Installation Section 2 Installation 2 1 Unpacking Carefully remove the contents of the shipping carton and check each item against the packing list before destroying any packing materials If there is any shortage or damage report it to the factory at 1 800 527 6297 US and Canada or 215 674 1234 International 2 2 Mounting the Level Control NOTICE mm The Z tron IV Level Control is available with the electronic unit and sensing element as a single integral assembly Extended sensing element lengths and special mountings can be provided to fit specific applications The Z tron IV Level Control 1s designed for industrial applications but it should be mounted in a location as free as possible from vibration corrosive atmospheres or any possibility of mechanical damage For convenience when adjusting place the electronic unit in a reasonably accessible location Ambient temperature should be between 40 F and 145 F 40 C to 63 C
33. hield Housing Ground 23 Z tron IV Point Level Control 5 4 Testing Relay Circuits The relay circuits consist of a double pole double throw relay brought out to a terminal strip Figure 5 2 shows the relay when the unit is in an alarm condition Using an ohmmeter perform the following steps to check out the relay circuits Re o Da YN Apply povver to the unit Connect ohmmeter as shown in Figure 5 3 Change fail safe switch position Ref Figure 3 1 Relay should change state Ohmmeter should change from measuring an open circuit to short circuit or from measuring a short circuit to measuring an open circuit An audible click may be observed if the background noise is low Repeat until all 4 pairs have been checked If any pair does not show a change in resistance the unit has failed N C N O N C N O ALARM ALARM 4 5 6 7 8 9 Figure 5 2 Relay Circuit Operation OHMMETER Go 00 DO O pee 0 3 D OR k ad 0 Co SSS gt a 1 e D i Q l DI 115Vac Figure 5 3 Relay Circuit Troubleshooting 24 Troubleshooting 5 5 Testing Remote Cable 1 Disconnect remote cable from electronic unit and sensing element 2 Using an ohmmeter measure the resistances as shown in Figure 5 4 A Check for shorts 1 Connect ohmmeter to ca
34. ice Buyer requested changes to its order Orders including those affecting the identity scope and delivery of the goods or services must be documented in writing and are subject to Seller s prior approval and adjustments in price schedule and other affected terms and conditions Orders requiring certified test data in excess of commercial requirements are subject to a special charge ORDER ACCEPTANCE All Orders are subject to final approval and acceptance by Seller at its office located at 205 Keith Valley Road Horsham Pennsylvania 19044 TERMS OF PAYMENT Seller s standard terms of payment for Buyers who qualify for credit are net thirty 30 days from date of invoice All invoices must be paid in United States dollars CREDIT Seller reserves the right at any time to revoke any credit extended to Buyer or otherwise modify terms of payment if Buyer fails to pay for any shipments when due or if in Seller s opinion there is a material adverse change in Buyer s financial condition Seller may at its option cancel any accepted Order if Buyer fails to pay any invoices when due DELIVERY Shipments are F O B place of manufacture Shipping Point and the Buyer shall pay all freight transportation shipping duties fees handling insurance storage demurrage or similar charges from Shipping Point Delivery of goods to common carrier shall constitute delivery and passing of title to the Buyer and all risk of loss or damage in transi
35. justment used to control the level at which the relay operates See Figure 3 1 This adjustment is an 20 turn potentiometer and does NOTICE not have a mechanical stop When in High Level Fail mm Safe condition if the red light LED is OFF turn CCW to find SP relay changes state w click amp light turns ON turn CW if red light LED is initially ON In Low Level Fail Safe turn the setpoint adjustment in the opposite direction Turning the setpoint adjustment clockwise CW raises the level at which the relay operates Turning the setpoint counterclockwise CCW lowers the level at which the relay operates The red LED on indicates that the relay is de energized and the unit is in the alarm condition Fail Safe Selector Switch Up High Level Fail Safe Down Low Level Fail Safe Time Delay Selector Switch Up Forward Acting Down Reverse Acting Time Delay Adjustment Clockwise Increases Delay Red Alarm LED Setpoint Adjustment Clockwise Increases Level Green Power LED SET TIM POWER POINT ALARM DELAY O 90299 I REV LLFS SET JUMPERS FOR A INPUT VOLTAGE 2 Watt o P N 385 0075 042 GND L2 L1 Figure 3 1 Z tron IV Operating Controls and LED 13 Z tron IV Point Level Control 3 2 Time Delay Control A The time delay adjustment is located on top of the instrument as shown in Figure 3 1 Itis used to help stop a repeated relay
36. o metal short circuit Verify that the sensing element is not touching any vessel structure If the sensing element still shows resistance between terminals of less than 10K ohms it is possible that moisture is present internal to the sensing element It may be possible to dry the sensing element until the resistance increases to a value in excess of 10K ohms However this is an indication the integrity of the sensing element has been compromised Contact the factory for recommendations 1A digital ohmmeter will often produce a resistance measurement that is higher than the actual value 22 Troubleshootin 5 3 Testing Sensing Element continued ANALOG ANALOG OHMMETER OHMMETER p N 2 N CO 00 CO e 00 TO CENTER TO OUTER CONDUCTOR GROUNDED CONDUCTOR GROUNDED TO Red Lug TO HOUSING HOUSING l en E dou PACKING PACKING GLAND GLAND DO NOT DISTURB DO NOT DISTURB PROBE MEASUREMENT SHIELD MEASUREMENT Sensing Element in Vessel Center Conductor to Housing Center Conductor to Cote Shield Cote Shield to Housing Sensing Element Cleaned Center Conductor to Housing Center Conductor to Cote Shield Cote Shield to Housing Figure 5 1 Checking the Sensing Element Center Probe Outer S
37. t shall be borne by Buyer Any claims or losses for damage or destruction after such delivery shall be the responsibility of Buyer Seller reserves the right to make delivery in installments which shall be separately invoiced and paid for when due without regard to subsequent deliveries Delay in delivery of any installment shall not relieve Buyer of its obligation to accept remaining deliveries Acknowledged shipping dates are approximate only and based on prompt receipt of all necessary information from Buyer and Buyer s compliance with terms of payment TAXES All sales excise and similar taxes which Seller may be required to pay or collect with respect to the goods and or services covered by any Order shall be for the account of the Buyer except as otherwise provided by law or unless specifically stated otherwise by Seller in writing TERMINATION AND HOLD ORDERS No Order may be terminated by Buyer except upon written request by Buyer and approval by Seller and if said request is approved by Seller under the following conditions 1 Buyer agrees to accept delivery of all of the units completed by Seller through the workday on which Seller receives the written termination request 2 Buyer agrees to pay to Seller all direct costs and expenses applicable to the portion of the Order that is incomplete WARRANTY A Hardware Seller warrants its goods against defects in materials and workmanship under normal use and service for one 1 ye
38. the electronic chassis using 12 gauge wire max 4 115 230 VAC Only Input voltage is field selectable a Use jumpers on side of electronic chassis to select input voltage b Input voltage jumper selection must match input voltage or electronic chassis may be damaged 5 The alarm relays are wired as shown in Figure 2 5 6 Review Checklist a Wiring correct b Input voltage matches instrument label and jumper selection c Proper output connections d Use 12 gauge wire max 7 Replace the cover prior to restoring power Be sure the power wiring and voltage are correct Improper wiring may cause permanent damage personal injury and void the factory warranty 8 Apply power Z tron IV Point Level Control 2 5 Power Wiring continued SET TIME FWD HES POWER POINT ALARM DELAY oO O2 NM SET JUMPERS FOR AN ineut VOLTAGE REV LLFS 2 Watt AL P N 385 0075 042 GND L2 L1 Se GROUND HOT GND LI POWER NEUTRAL CONNECT I ONS Ka L2 SEE JUMPER SELECTIONS Input Voltage Selection 115 230 VAC Only Figure 2 4 1 Power Wiring 2 5 Power Wiring continued CUSTOMER WIRING 115 VAC an dos SET JUMPERS FOR Ge ZIN INPUT VOLTAGE Watt AL DIN 385 0075 042 I GND L2 L1 i Y TelelelsieirIsts CUSTOMER WIRING 230 VAC 0 60 ET JUMPERS FOR EX INPUT VOLTAGE Watt P N 385 0075 042 Ka
39. tions or the probe and the vessel wall insulating applications increases This 1s due to the dielectric constant k of the material which causes a bridge misbalance The signal is demodulated rectified amplified and the output 1s increased There are drawbacks however especially when there is coating of the probe An RF Admittance level transmitter is the next generation Although similar to the capacitance concept The Z tron employs a radio frequency signal and adds the Cote Shield circuitry within the Electronics Unit This patented Cote Shield circuitry is designed into Z tron series and enables the instrument to ignore the effect of buildup or material coating on the sensing element The sensing element is mounted in the vessel and provides a change in RF admittance indicating presence or absence of material The Cote Shield element of the sensor prevents the transmission of RF current through the coating on the sensing element The only path to ground available for the RF current is through the material being measured The result is an accurate measurement regardless of the amount of coating on the probe making it by far the most versatile technology good for very wide range conditions from cryogenics to high temperature from vacuum to 10 000 psi pressure and works with all types of materials 115 230 VAC Electric Unit 24 DC Electronic Unit Part 385 0075 042 Part 385 0075 041 Z tron IV Point Lev
40. tivity unit Consult factory Troubleshooting 5 7 Factory Assistance AMETER Drexelbrook can answer any questions about The Z tron IV series instrument Call Customer Service at 1 800 553 9092 US and Canada or 1 215 674 1234 International If you require assistance and attempts to locate the problem have failed Contact your local Drexelbrook representative Telephone the Service department toll free 1 800 527 6297 US and Canada 1 215 674 1234 International FAX Service Department 215 443 5117 E Mail drexelbrook service ametek com Please provide the following information Instrument Model Number Sensing Element Model Number and Length Original Purchase Order Number Material being measured Temperature Pressure Agitation Brief description of the problem Checkout procedures that have failed 5 8 Field Service Trained Field Service Engineers are available on a time plus expense basis to assist in start ups diagnosing difficult application problems or in plant training of personnel Contact the service department for further details 5 9 Customer Training Periodically AMETEK Drexelbrook instrument training seminars for customers are held at the factory These sessions are guided by Drexelbrook engineers and specialists and provide detailed information on all aspects of level measurement including theory and practice of instrument e operation For more information call 215 674 1234
41. tt DC Units 24 VDC Unit 19 29 VDC input 2 Watt Sensitivity 0 3pF or less Operating Point Range 0 80 pF 20 Turn Pot 4 pF per Turn Extended range with external pad capacitor Pad ratio 1 1 Load Resistance Center to Ground 1500 Ohms Center to Shield 750 Ohms Shield to Ground 750 Ohms Failsafe Field adjustable to either High Level Fail Safe HLFS or Low Level Fail Safe LLFS Output DPDT relay closure Contact Rating 5A 120 Vac non inductive 2A 230 Vac non inductive Ambient Temperature 40 F to 145 F 40 C to 63 C Temperature Effect 0 5pF 50 F Line Voltage Effect 0 2pF 20V 120 Vac Stability 0 15pF 6 mo maximum shift Spark Protection 100 Amp Mounting Probe Dependant 34 1nch NPT Typical 29 Z tron IV Point Level Control Section 6 Specifications Continued Housing The standard housing meets the following classifications Nema 1 General Purpose Nema2 Drip Tight Nema3 Weather Resistant Nema 4 Waterproof Nema 5 Dust Tight Nema 12 Industrial Use If hazardous area approval is required use the Drexelbrook PXL The Point instrument for point level control Time Delay 0 60 seconds 3 4 Turn Pot 270 Potentiometer Approvals FM FMC 3810 General Purpose 30 Appendix Appendix A Shortening or Lengthening the Sensing Element A CAUTION The insulation length of either Flush Sensing Elements or Insulated Sensing Elements can NOT be
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