Penberthy Level Control Switch, Model MGS-314/314D Owner's manual

Brand: Penberthy

Model: Level Control Switch, Model MGS-314/314D

Type: Owner's manual

PENBERTHY MODEL MGS-314 SERIES AND MGS-314D SERIES LEVEL CONTROL SWITCH

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

Before installation, these instructions must be read carefully and understood.

PRODUCT WARRANTY

Emerson warrants its Penberthy products

as designed and manufactured to be free of

defects in material and workmanship for a

period of one year after the date of installation

or eighteen months after date of manufacture,

whichever is earliest. Emerson will, at its

option, replace or repair any products which

fail during the warranty period due to defective

material or workmanship.

Prior to submitting any claim for warranty

service, the owner must submit proof of

purchase to Emerson and obtain written

authorization to return the product. Thereafter,

the product shall be returned to Emerson, with

freight prepaid.

This warranty shall not apply if the product has

been disassembled, tampered with, repaired

or altered outside of the Emerson factory, or

if it has been subjected to misuse, neglect

oraccident.

Emerson's responsibility hereunder is

limited to repairing or replacing the product

at its expense. Emerson shall not be liable

for loss, damage, or expenses directly or

indirectly related to the installation or use

of its products, or from any other cause or

for consequential damages. It is expressly

understood that Emerson is not responsible

for damage or injury caused to other products,

building, property or persons, by reason of the

installation or use of its products.

1 INTRODUCTION

The instructions in this manual pertain to

the Penberthy Model MGS-314 or MGS-314D

magnetic level meter switch.

The Model MGS-314/314D Series magnetic

level meter switch is designed to detect the

passage of the float in a MULTIVIEW™ magnetic

liquid level meter, at a specific location. The

switch consists of a snap-action switch and

a magnetic actuation assembly encased

in a watertight (Type 4) or explosion-proof

(Type7)enclosure.

This is Emerson's sole warranty and in lieu of

all other warranties, expressed or implied which

are hereby excluded, including in particular all

warranties of merchantability or fitness for a

particular purpose.

This document and the warranty contained

herein may not be modified and no other

warranty, expressed or implied, shall be made

by or on behalf of Emerson unless modified or

made in writing and signed by the company's

president or a vice president.

TABLE OF CONTENTS

Product warranty ................................................ 1

1 Introduction ............................................. 1

2 Specifications/Approvals ......................... 2

2.1 Enclosure ..................................................... 2

2.2 Switch ........................................................... 2

2.3 Approvals ...................................................... 2

3 Theory of Operation ................................. 2

4 Installation ............................................... 2

4.1 Unpacking..................................................... 2

4.2 Mounting the switch .................................... 3

4.3 Wiring connection ........................................ 3

5 Set-up ...................................................... 4

5.1 Initial test ...................................................... 4

6 Pump-Control Set-up .............................. 4

6.1 Interval relay wiring ..................................... 4

7 Troubleshooting ...................................... 4

7.1 Introduction .................................................. 4

7.2 Switch test .................................................... 4

7.3 Actuation test ............................................... 4

8 Telephone Assistance .............................. 5

9 Model KFA5-SR2-Ex2.W.IR

Interval Relay .......................................... 9

9.1 Operation ...................................................... 9

9.2 Typical applications ..................................... 9

9.3 Connection diagram .................................... 9

Tables and Figures

Figure 1 - MGS-314 Series ................................ 3

Figure 2 - MGS-314D Series ............................. 3

Figure 3 - Control drawing CSA approved

explosion-proof for

MGS-314/314D (7E741-009) ............. 5

Figure 4 - Control drawing CSA approved

intrinsically safe for

MGS-314/314D (7E742-009) ............. 6

Figure 5 - Control drawing ATEX/IECEx

certified explosion-proof for

MGS-314/314D (7E741-010) ............. 7

Figure 6 - Control drawing ATEX/IECEx

certified intrinsically safe for

MGS-314/314D (7E742-010) ............. 8

Figure 7 - Application 1-Pump-up diagram ..... 9

Figure 8 - Application 2-

Pump-down diagram ........................ 9

Figure 9 - Connection diagram ......................... 9

PENBERTHY MODEL MGS-314 SERIES AND MGS-314D SERIES LEVEL CONTROL SWITCH

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

2 SPECIFICATIONS/APPROVALS

2.1 Enclosure

Watertight (Type 4) and explosion-proof (Type 7) cast aluminum housing; NBR O-ring

2.2 Switch

Output:

MGS-314 Series: SPDT (Form C) switch output: 5 amps at

125

250 Vac, non-inductive load

MGS-314D Series: DPDT (2x Form C) switch output: 10 amps at

125

250 Vac, non-inductive load

Repeatability: Better than

32"

Response time: <100 milliseconds

Operating temperature:

-40 to 365°F (-40 to 185°C) - with third party approvals (CSA)

-40 to 645°F (-40 to 340°C) - without third party approvals

Ambient temperature range -4 to 104°F (-20 to 40°C)

Dead band: ± ½"

2.3 Approvals

Models: MGS-314-C/MGS-314D-C

CSA Approved Ex d

Explosion-proof for: Division 1, 2;

Class I; Groups B, C, D;

Class II; Groups E, F, G;

Class III; Type 4

When installed in accordance with control

drawing 7E741-009 (Figure 3)

CSA Approved Ex ia

Intrinsically safe for: Division 1, 2;

Class I; Groups A, B, C, D;

Class II; Groups E, F, G;

Class III; Type 4

When installed in accordance with control

drawing 7E742-009 (Figure 4)

Models: MGS-314-A/MGS-314D-A

ATEX/IECEx Certified

Flame proof for:

Ex d IIB + H2 T6 Gb

When installed with accordance with control

drawing 7E741-010 (Figure 5)

*Must use suitable certified conduit seal

ATEX/IECEx Certified

Intrinsically safe for:

Ex ia IIC + T6 Ga

When installed in accordance with control

drawing 7E742-010 (Figure 6)

3 THEORY OF OPERATION

While reading the theory of operation refer

to Figure 1 (MGS-314 Series) or Figure 2

(MGS-314D Series) for the location of the

components. The description is based on a

sideview.

With the liquid level below the switch, the

toggle magnet should be at position 'A'. It

is held in this position by an attractor near

the magnet at the bottom of the toggle. As

the float ascends and passes the switch,

thedraw between the float magnet and toggle

magnet is sufficient to overcome the attractor.

Consequently, the toggle moves to position

'B' and is held in place by a second attractor.

The movement of the toggle causes the switch

(orswitches) to change state.

As the float descends with the liquid level it

passes the switch and the process described is

reversed. The toggle returns to position 'A' and

the switch returns to its original state.

4 INSTALLATION

4.1 Unpacking

Upon receiving the Model MGS-314/314DSeries

Magnetic Level Meter Switch, check all

components carefully for damage incurred in

shipping. If damage is evident or suspected,

do not attempt installation. Flameproof joints

are not to be repaired. Notify the carrier

immediately and request a damage inspection.

Check each item against the packing list.

PENBERTHY MODEL MGS-314 SERIES AND MGS-314D SERIES LEVEL CONTROL SWITCH

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

4.2 Mounting the switch

Due to shipping vibration, it is possible the

magnet toggle will not be in the 'normal'

position for proper operation. If this occurs,

simply cycle the float past the switch once.

Thiswill initialize it automatically.

1. Measure the distance from the top of the

indicating scale, on the magnetic level

meter, to the top of the communicating

chamber. Record this distance.

2. Loosen the clamps holding the indicating

scale to the communicating chamber.

3. Open the mounting band supplied with the

MGS-314/314D Series and put it around

the communicating chamber, under the

indicating scale.

4. Place the MGS-314/314D Series on

the communicating chamber with the

cooling fins facing 180° away from the

communicating chamber and with the

conduit opening facing down.

Position 'A' Position 'B'

Position 'B'

Figure 2

MGS-314D SERIES

Figure 1

MGS-314 SERIES

Position 'A'

Toggle Toggle

Toggle

4.3 Wiring connection

If you are using conduit for the switch wiring

use a conduit seal with a drain or a drip-loop to

prevent condensate from entering the housing.

Condensate can cause electrical shorts.

The switch housing has a ½" NPT-F

connection for the wiring conduit.

We recommend attaching an aluminum

condulet, via a 300 Series stainless steel

nipple, to the conduit opening of the switch

housing. This will give you an accessible point

to terminate the control wires. DO NOT USE

any ferromagnetic material such as: carbon

steel, duplex, 400 Series stainless steel or

castiron.

5. Put the mounting band between the cooling

fins in the channel provided.

6. Loosely tighten the mounting band. Move

the MGS-314/314D Series either up or down

to the desired position, and tighten the band.

7. The switch must be mounted within the

indication range for the magnetic gauge.

The mounting band for the switch should be

a minimum of 1" inside the indication range.

This will insure sufficient float movement to

operate the switch.

8. If more than one switch is used on a

single magnetic gauge, the minimum

recommended distance between mounting

bands is 3".

9. Adjust the position of the indicating scale so

that the distance from the top of the scale

to the top of the communicating chamber

is the same as in Step 1. Tighten the

clamps holding the indicating scale to the

communicating chamber.

PENBERTHY MODEL MGS-314 SERIES AND MGS-314D SERIES LEVEL CONTROL SWITCH

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

6 PUMP-CONTROL SET-UP

By combining two MGS-314/314D Series

switches with the interval relay (WE77/Ex-JR)

you can achieve intrinsically safe pump-control.

6.1 Interval relay wiring

MGS-314 Series

For pump-up action connect the red and black

wires from the high level switch to Terminals

1 and 2. Connect the red and black wires from

the low level switch to Terminals 8 and 9. The

jumpers should be between Terminals 3 and 4,

and Terminals 6 and 7.

For pump-down action connect the high level

switch to Terminals 8 and 9, and the low level

switch to Terminals 1 and 2. Leave the jumpers

in the same position as pump-up action. For

technical information on the WE77/Ex-JR see

Appendix A.

Two 10kΩ resistors must be installed in parallel

across the leads as close to the MGS-314 Series

switches as possible. One across leads 1 and 2,

the other across leads 8 and 9.

MGS-314D Series

(Assume the toggle is at position 'A' for the

following directions)

For pump-up action connect one common and

a corresponding open connection from the high

level switch to Terminals 1 and 2. Connect the

same color combination from the low level

switch to Terminals 8 and 9. The jumpers

should be between Terminals 3 and 4, and

Terminals 6 and 7.

For pump-down action connect the high level

switch to Terminals 8 and 9, and the low level

switch to Terminals 1 and 2. Leave the jumpers

in the same position as pump-up action. For

technical information on the WE77/Ex-JR see

Appendix A.

5.1 INITIAL TEST

Model Toggle orientation

Wire color

Black Red Blue Orange White Violet

MGS-314

Series

Toggle at position 'A'

(liquid level below switch)

Common

Open Closed NA NA NA

Toggle at position 'B'

(liquid level above switch)

Closed Open NA NA NA

MGS-314D

Series

Toggle at position 'A'

(liquid level below switch)

Common

(for blue

and white)

Common

(for orange

and violet)

Closed Open Open Closed

Toggle at position 'B'

(liquid level above switch)

Open Closed Closed Open

7 TROUBLESHOOTING

7.1 Introduction

Your Penberthy magnetic level meter switch

is designed to give you years of unattended

service. However, failure of electrical equipment

can occur. Sound maintenance practices

require periodic inspection of the instrument to

ensure it is in good working order.

DANGER!

Energizing the switch with the cover removed

may cause ignition of flammable materials or

atmospheres, resulting in personal injury, death

or property damage.

Do not apply power to the switch while performing

these tests.

7.2 Switch test

With the switch toggle at position 'A' use an

ohmmeter to verify the conditions in section5.1.

If these conditions are not met remove the (9)

socket head cap screws holding the housing

together. With the ohmmeter still connected,

close the switch manually. If the switch still

doesn't change state, it is defective. Go to

Section8.

7.3 Actuation test

If the switch works (see Section 7.2) check

the toggle magnet [MGS-314 Series] or toggle

magnet/cam (MGS-314D Series). It should

travel freely with a minimum of lateral

(side-to-side) motion. This can be adjusted

by loosening or tightening the two dog point

setscrews that the toggle magnet pivots on

(MGS-314 Series) only. If the nylon tips are

damaged replace the setscrews.

5 SET-UP

DANGER!

Energizing the switch with the cover removed can cause ignition of flammable materials or

atmospheres, resulting in personal injury, death or property damage.

Do not apply power to the switch while performing these tests.

Use an ohmmeter to verify the conditions

above. If these conditions do not exist, go to

Section 7.

Two 10kΩ resistors must be installed in parallel

across the leads as close to the MGS-314D Series

switches as possible. One across leads 1 and 2,

the other across leads 8 and 9.

PENBERTHY MODEL MGS-314 SERIES AND MGS-314D SERIES LEVEL CONTROL SWITCH

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

8 TELEPHONE ASSISTANCE

If you are having problems with your

Penberthy level meter switch, notify your

local Penberthy distributor, or call the factory

direct at (281) 274-4400 and ask for an

applicationsengineer.

To help us to assist you more effectively, please

have as much of the following information as

possible when you call:

• Instrument model # (MGS-314/314D Series)

• Name of the company from whom you

purchased the switch

• Invoice # and date

• Process material

• Process temperature

• Brief description of the problem

• Checkout procedures (from the instruction

manual) that failed

If attempts to solve your problem fail, you

may be requested to return your instrument

to the factory for testing. You must obtain a

return authorization (R.A.) number from your

authorized Penberthy distributor prior to

returning your unit. Failure to do so will result

in the unit being returned to you, without being

tested and freight collect. To obtain an R.A.

number collect the following information:

• Reason for return

• Person to contact at your company

• 'Ship-to' address

There will be a minimum charge applied for

evaluation of non-warranty units. You will be

contacted before any repairs are performed if

they will result in additional charges in excess

of the minimum. If you return a unit that is

under warranty but not defective, the minimum

charge will apply.

CONTROL DRAWING CSA APPROVED EXPLOSION-PROOF

FOR MGS-314/314D (7E741-009)

HAZARDOUS AREA NON-HAZARDOUS AREA

CLASS I DIV 1 GROUP B, C, D

CLASS II DIV 1 GROUP E, F, G

CLASS III DIV 1

MODELS MGS-314-C

MGS-314D-C

18"

A flame path seal-off shall be

installedwithin 18 in. of enclosure.

Wiring to be in accordance with National Electrical Code (NEC)

pertinentparts of the 500 Series of article5 or local codes as applicable.

Figure 3

MODEL MGS-314-C

MGS-314D-C

INTRINSINC SAFETY

BARRIER

Vmax = 40Vdc

Imax = 150mA

= 0nF

= 0mH

NO or NC

MAG. SWITCH

TB1

COM

CLASS I DIV 1 GROUP A, B, C, D

CLASS II DIV 1 GROUP E, F, G

CLASS III DIV 1

CLASS I DIV 1 GROUP A, B, C, D

CLASS II DIV 1 GROUP E, F, G

CLASS III DIV 1

HAZARDOUS AREA

NON-HAZARDOUS AREA

USER WIRING

R < 1Ω

PENBERTHY MODEL MGS-314 SERIES AND MGS-314D SERIES LEVEL CONTROL SWITCH

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS

CONTROL DRAWING CSA APPROVED INTRINSICALLY

SAFE FOR MGS-314/314D (7E742-009)

TWO WIRE ENTITY CONTROL DRAWING

THREE WIRE ENTITY CONTROL DRAWING

Cleads

Lleads

Unused NO or NC lead shall be blind

terminated and insulated.

The intrinsic safety barrier parameters must

meet the following requirements:

Voc ≤ 40V or Isc ≤ 150mA;

Ca ≥ Cleads; La ≥ Lleads

One multiple channel intrinsic safety barrier

must be used.

The barrier parameters must meet the

following requirements:

Vt ≤ 40V or It ≤ 150mA;

Ca ≥ Cleads; La ≥ Lleads

Installation shall conform to the

manufacturer's instructions supplied with the

intrinsic safety barrier as well as the National

Electric Code and ANSI/ISA-RP 12.6 or CSA C22

"Installation of Intrinsically Safe Instrument

Systems in Hazardous (classified) Locations."

Maximum non-hazardous area voltage must

not exceed 250 Vrms or Vdc.

For IS. installation temperature shall not

exceed 225°F (107°C).

Figure 4

Use CSA certified safety barriers:

MODEL MGS-314-C

2 MGS-314D-C

Vmax = 40Vdc

Imax = 150mA

= 0nF

= 0mH

MAG. SWITCH

TB1 NC

COM

Cleads

Lleads

R < 1Ω

INTRINSINC SAFETY

BARRIER

MULTIPLE CHANNEL

USER WIRING

MGS-314-C CONNECTIONS MGS-314D-C CONNECTIONS

BLUE WHITE VIOLET

ORANGE

RED

CASE

GROUND

CASE

GROUND

RED

BLUE

BLACK BLACK

GREEN

PENBERTHY MODEL MGS-314 SERIES AND MGS-314D SERIES LEVEL CONTROL SWITCH

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS - APPENDIX A

Figure 5

CONTROL DRAWING ATEX/IECEx CERTIFIED

EXPLOSION-PROOF FOR MGS-314/314D (7E741-010)

HAZARDOUS AREA

EX d IIB

Models MGS-314-A

MGS-314D-A

MGS-314L-A

A flame path seal-off shall be installed directly to threaded

entry of enclosure

Wiring to be in accordance with National Electric Code (NEC) pertinent parts of the 500 series of Article 5 or local codes as applicable.

NON-HAZARDOUS AREA

PENBERTHY MODEL MGS-314 SERIES AND MGS-314D SERIES LEVEL CONTROL SWITCH

INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS - APPENDIX B

Figure 6

MGS-314-A and MGS-314L-A CONNECTIONS

MODEL MGS-314-A

MGS-314L-A

MGS-314D-A

INTRINSINC SAFETY

BARRIER

Vmax = 40Vdc

Imax = 150mA

= 0nF

= 0mH

NO or NC

MAG. SWITCH

TB1

COM

Use suitably certified safety barriers for Ex ia IIC.

HAZARDOUS AREA

NON-HAZARDOUS AREA

USER WIRING

R < 1 Ω

THREE WIRE ENTITY CONTROL DRAWING

Cleads

Lleads

Unused NO or NC lead shall be blind

terminated and insulated.

The intrinsic safety barrier parameters must

meet the following requirements:

Voc ≤ 40V or Isc ≤ 150mA;

Ca ≥ Cleads; La ≥ Lleads

One multiple channel intrinsic safety barrier

must be used.

The barrier parameters must meet the

following requirements:

Vt ≤ 40V or It ≤ 150mA;

Ca ≥ Cleads; La ≥ Lleads

Installation shall conform to the

manufacturer's instructions supplied with the

intrinsic safety barrier as well as the National

Electric Code and ANSI/ISA-RP 12.6 or CSA C22

"Installation of Intrinsically Safe Instrument

Systems in Hazardous (classified) Locations."

Maximum non-hazardous area voltage must

not exceed 250 Vrms or Vdc.

For IS. installation temperature shall not

exceed 225°F (107°C).

Vmax = 40Vdc

Imax = 150mA

= 0nF

= 0mH

MAG. SWITCH

TB1 NC

COM

Cleads

Lleads

R < 1 Ω

INTRINSINC SAFETY

BARRIER

MULTIPLE CHANNEL

USER WIRING

MGS-314D-A CONNECTIONS

BLUE

WHITE

VIOLET

ORANGE

RED

CASE

GROUND

CASE

GROUND

RED

BLUE

BLACK

GREEN

CONTROL DRAWING ATEX/IECEx CERTIFIED

INSTRINSICALLY SAFE FOR MGS-314/314D (7E742-010)

TWO WIRE ENTITY CONTROL DRAWING

Use certified Safety Barriers: Ex ia IIC.

MODEL MGS-314-A

MGS-314L-A

MGS-314D-A

Solutions business unit of Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their

prospective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be

construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed

by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time

without notice.

Emerson Electric Co. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance

of any Emerson Electric Co. product remains solely with the purchaser.

Emerson.com/FinalControl

9.3 Connection diagram

Two 10 kΩ resistors (R1) must be installed in

parallelacross the leads as close to the

MGS-314/314D switches as possible.

Oneacross leads 1 and 3, the other across

leads 4and 6.

Two 1 k

Ω resistors (R2) must be installed in

series with leads 3 and 6.

Intinsically-Safe Input