Ametek 502-3000 Series Installation And Operating Instructions Manual Download Page 36

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502-3000 Series Ztron

Point Level Control

Troubleshooting

5.6 Testing the

Spark Protector

Refer to Figure 5-4 to test the spark protector.

Figure 5-4

Testing the Spark Protector

SCREW

TO COAX CABLE

CENTER CODUCTOR

TAB

TO SENSOR

CENTER ROD

GROUND

Testing 377-1-19 Remote Spark Protector

tab - screw 47 OHMS

tab - green wire OPEN CIRCUIT
screw - green wire OPEN CIRCUIT

GREEN WIRE

METAL TAB

SENSING ELEMENT

GREEN

GROUND

WIRE

TO COAX

CENTER

CONDUCTOR

TO COAX

SHIELD

WIRE

Testing 377-1-24 Integral Spark Protector

CORRECT METER READINGS

CENTER CONDUCTOR - TAB = 47 OHMS
CENTER CONDUCTOR - SHIELD WIRE = OPEN
CENTER CONDUCTOR - GROUND = OPEN
SHIELD WIRE - GROUND WIRE = OPEN
SHIELD WIRE - TAB = OPEN
TAB TO GROUND = OPEN = OPEN

ANALOG OR

DIGITAL

OHMMETER

Summary of Contents for 502-3000 Series

Page 1: ...Service Drexelbrook com Leader in Level Measurement For Assistance Call 1 800 527 6297 Outside North America 1 215 674 1234 Installation and Operating Instructions Series 502 3000 ZtronTM Level Contro...

Page 2: ...n 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...

Page 3: ...tronics 502 3000 502 3200 502 3300 502 3400 502 3500 205 Keith Valley Road Horsham PA 19044 US Sales 800 553 9092 24 Hour Service 800 527 6297 International 215 674 1234 Fax 215 674 2731 E mail deinfo...

Page 4: ...trol optional 21 3 3 Failsafe Selector 21 3 4 Start up 22 SECTION 4 CALIBRATION 23 4 1 Calibration in Conducting Material 23 4 2 Calibration in Insulating Material Horizontal Mount 23 4 3 Calibration...

Page 5: ...escription The Drexelbrook Ztron Level Control Figure 1 1 includes a 402 3000 series electronic unit and a 700 series sensing element Cote ShieldTM action is designed into all Ztron level controls exc...

Page 6: ...er 0 120 Vac with relay 2 24 Vdc with relay 3 220 Vac with relay 4 24 Vdc isolated 5 12 Vdc isolated Sensitivity 0 Standard Sensitivity 2 High Sensitivity Electronic Unit Options 0 Standard Electronic...

Page 7: ...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 40o F a...

Page 8: ...Mounting Recommendations GOOD BEST NOZZLE TOO LONG and COTE SHIELD TOO SHORT WRONG COTE SHIELD MUST EXTEND THROUGH NOZZLE AND WALL BUILD UP GOOD NOZZLE REMOVED FACTORY SUPPLIED EXTENDED COTE SHIELD EX...

Page 9: ...nduit seals within 18 inches of housing Install per Drexelbrook instructions DREXELBROOK Explosionproof and dust ignition proof 285 1 42 OR 285 1 43 enclosures only for Div 1 Class1 Groups ABCD ClassI...

Page 10: ...6 502 3000 Series ZtronTM Point Level Control Installation Figure 2 3 Mounting Dimensions Integral Ztron Level Control All dimensions in inches mm...

Page 11: ...7 502 3000 Series ZtronTM Point Level Control Installation Figure 2 4 Mounting Dimensions Remote Ztron Level Control All dimensions in inches mm...

Page 12: ...r to Figures 2 5 through 2 9 for the appropriate power wiring drawing and use the following procedure to wire the Ztron level control a Ensure that all power to the wiring is off b Remove the cover c...

Page 13: ...502 3000 Series ZtronTM Point Level Control Installation 9 Figure 2 5 Wiring the 502 300X 120 Vac Electronic Unit...

Page 14: ...502 3000 Series ZtronTM Point Level Control Installation 10 Figure 2 6 Wiring the 502 320X 24 Vdc Electronic Unit...

Page 15: ...502 3000 Series ZtronTM Point Level Control Installation 11 Figure 2 7 Wiring the 502 330X 240 Vac Electronic Unit...

Page 16: ...502 3000 Series ZtronTM Point Level Control Installation 12 Figure 2 8 Wiring the 502 340X 24 Vdc Isolated Electronic Unit...

Page 17: ...502 3000 Series ZtronTM Point Level Control Installation 13 Figure 2 9 Wiring the 502 350X 12 Vdc Isolated Electronic Unit...

Page 18: ...terminal strip on the electronic unit N C Normally Closed N O Normally Open Figure 2 10 Wiring the Relays LED ON 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 HIGH LEVEL FAI...

Page 19: ...ntegral If the Ztron level control has the electronic unit mounted in the same housing as the sensing element integral mount the sensing element is prewired at the factory as shown in Figure 2 11 All...

Page 20: ...harge that can damage the electronic unit If required a heavy duty spark protector is available as an option and will be prewired at the factory with integrally mounted Ztron level controls Figure 2 1...

Page 21: ...the individual terminals on the side opposite the terminal strips See Figure 2 13 NOTE It is important that the sensing element cable is mechanically separated from the power wiring When installing re...

Page 22: ...ions are made to the sensing element after it has been installed in the vessel with the condulet attached For two terminal sensing elements the shield wire is not used at the sensing element end and m...

Page 23: ...k protection is supplied use the following instructions for installing the spark protector in the sensing element condulet See Figure 2 12 or 2 15 a Attach the mounting link on the spark protector to...

Page 24: ...ure 3 1 NOTE This adjustment is a 35 turn potentiometer and does not have a mechanical stop A small click can be heard when the adjustment has been turned fully in either direction Turning the setpoin...

Page 25: ...r Using a small screwdriver and turning in the clockwise direc tion the time delay adjustment is set from 0 to 90 seconds The delay applies only to recovery from the alarm condition With High Level Fa...

Page 26: ...3 2 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...

Page 27: ...for use in a hazardous location 4 1 Calibration in Conducting Material All Ztron controls except for model 502 3000 918 are factory set to switch in water based conducting materials setpoint adjustmen...

Page 28: ...ent does not have a mechanical stop A small click can be heard when the adjust ment has been turned fully in either direction The LED on indicates that the relay is ener gized or in normal condition n...

Page 29: ...t 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 calibration reference Cali...

Page 30: ...Vertical Ztron Material Covering Sensing Element b Start from the full counterclockwise CCW position Turn the setpoint adjustment clockwise CW until the relay just operates LED changes states NOTE If...

Page 31: ...l Drexelbrook representative or call the fac tory direct at 1 800 527 6297 US and Canada or 1 215 674 1234 International 5 2 Testing the Electronic Unit Use the following procedure to troubleshoot the...

Page 32: ...of sensing element terminals See Figure 5 1 Center wire to ground __________ohms Center wire to shield __________ohms Shield to ground __________ohms d A new sensing element that is clean and not coat...

Page 33: ...ance reading of less than 10 ohms on any sensing element terminal is usually due to a metal to metal short circuit Check that the sensing element is not touching any vessel structure Figure 5 1 Checki...

Page 34: ...three conductors All readings should show an open circuit infinite resistance If resistance is measured the coax cable insulation is punctured or damaged d Check for continuity of each conductor Short...

Page 35: ...igh or low level and one pair will be closed with high or low level Refer to Figures 2 10 and 5 2 Figure 5 2 Relay Circuit Operation b Relay operation may generally be heard as an audible click when t...

Page 36: ...1 19 Remote Spark Protector tab screw 47 OHMS tab green wire OPEN CIRCUIT screw green wire OPEN CIRCUIT GREEN WIRE METAL TAB TO SENSING ELEMENT GREEN GROUND WIRE TO COAX CENTER CONDUCTOR TO COAX SHIEL...

Page 37: ...ion material HLFS due to fill length Consult factory angle c Improper wiring c See section 2 d Improper calibration d See section 4 e Electronic unit malfunction e See section 5 2 f Open coax f See se...

Page 38: ...___________ Pressure ______________________________________ Agitation______________________________________ Brief description of the problem _______________________ ___________________________________...

Page 39: ...der 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 pre...

Page 40: ...dc input 3W maximum 12 Vdc Isolated Unit 402 3500 9 16 Vdc input 3W maximum Sensitivity 3pF or less Load Resistance Center to Ground 1500 ohms Center to Shield 750 ohms Shield to Ground 750 ohms Fails...

Page 41: ...sing Element System Sensing Process Process Center Model Element Temperature Wetted Rod Number Model and Pressure Parts O D 502 3000 Number 700 901 206 101 250 F 200 psi1 316 SS and Epoxy 3 8 inch 002...

Page 42: ...y Road Horsham PA 19044 US Sales 800 553 9092 24 Hour Service 800 527 6297 International 215 674 1234 Fax 215 674 2731 E mail deinfo drexelbrook com Web www drexelbrook com An ISO 9001 Certified Compa...

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