Gems SureSite Magnetic Liquid Level Indicator Instruction Bulletin

The Gems SureSite Magnetic Liquid Level Indicator is a shock and vibration-proof device that uses a float and flags to make the liquid level inside a tank visible, even at a distance. The SureSite is designed to work with a variety of liquids and is available in a variety of configurations, including standard, mini, and plastic. The SureSite can be used with a switch module to allow you to control a variety of devices based on the liquid level in the tank.

PDF Download

Document

SureSite

Magnetic Liquid Level Indicator

Instruction Bulletin No. 177664-1

(Rev. F)

Section 1: Weldments

Thank you for purchasing the GEMS SureSite Magnetic Level Indicator. Please read this document prior to

installing your SureSite and store it where it may be readily referred to for familiarization and maintenance purposes. If you require any additional information, you are welcome to call GEMS at the number shown below.

1-800-321-6070

(Outside of the Continental U.S., call 860-747-3000)

Record the Part Number of your SureSite here to use when ordering spare or replacement parts:

Part Number:____________________

SureSite Operating Principle

The liquid level of a tank is made visible, even at great distances, through the use of a shock and vibration-proof magnetic level indicator that employs “flags” arranged within a specially constructed external housing: the flag assembly. The two sides of each pivoting flag are marked with contrasting colors. A permanent magnet is encapsulated inside each flag and forms a secure magnetic interlock with the adjacent flags. As the liquid level rises, a float equipped with a permanent magnet causes each of the flags to begin rotating in turn.

This action exposes the contrasting (fluid level indicating) color on the other side of the flag. As the float and liquid level rise, each flag below the level of the float completes a 180 degree rotation, while remaining magnetically interlocked with the other lower flags. Together, the rotated flags display a band or column of color, the height of which corresponds with the liquid level within the tank. An exclusive feature of the SureSite is the magnetic guide that is integrated into the flag assembly. This magnetic attraction ensures that the float is always aligned for optimum performance and exactness, regardless of any shock, vibration, or rapid change to the level of fluid in the tank.

Standard and Mini-SureSites are supplied with the floats packed either separately, or securely strapped to the unit. Top-mounted

SureSites are typically supplied with the floats installed and secured by a support tube. The float supplied with each unit has been designed to the specific gravity of the fluid being monitored, so that the permanent bar magnet will always seek and indicate the fluid surface.

Because of the attraction of the permanent bar magnet in the float and the patented magnetic guide, the SureSite flag assembly can be rotated to a position which will allow for optimum viewing.

Liquid

Flag Channel

Tank

Magnetic Flags

(Plain Side Out)

Magnetic

Float

Magnetic Flags

(Colored

Side Out)

Weldment

(See the Maintenance Section on page 5 for instructions on how to rotate your

SureSite flag assembly.)

- 1 -

Important!

Read the following instructions completely - BEFORE installing the SureSite.

Installation Precautions and Preparation

Failure to observe these precautions could affect the operation of your unit.

1. When locating the tank ports for the SureSite, make sure that no strong magnetic fields or magnetic materials

(such as railings, protective cages, I-beams, etc.) will be any closer than 6 inches (153 mm) from the SureSite.

2. Make necessary efforts to ensure that all tank-side modifications and equipment; i.e., the mating flanges, NPT

ports or shut-off valves (if used) will align properly with the SureSite connections. Improper alignment could

cause distortion and may damage welds and compromise the integrity of the SureSite and/or the tank.

3. After any necessary tank modifications are completed, the tank should be cleaned to remove contaminants. This

will ensure that the installation is free of foreign particles; especially those which could be magnetic and which

could impair the performance of the SureSite.

4. Do not begin the installation of the SureSite until all necessary tools and materials are obtained. (Such as

mating flange gaskets, bolting hardware, etc. )

5. Gasket material typically supplied with the standard SureSite unit is either Viton or nitrile rubber, Garlock 3000

style. Higher pressure units are typically supplied with Flexitallic TM gaskets. For replacement gaskets, please

consult GEMS Sensors for your specific material type.

6. All supplied flag assembly clamps are intended to be installed with a torque on the clamp screw not to exceed

5 lb.-inches.

Installation

Caution

Handle the SureSite with care to avoid damaging the threaded areas, flange surfaces, etc.

Note

If you have a top-mounted alloy or top-mounted plastic SureSite, skip to Page 4 for instructions.

For Standard SureSites (Alloy, Mini and Plastic)

1. Remove the protective packing materials from your SureSite.

2. Position the unit horizontally on a level surface.

3. Unpack the float assembly or, with the aid of a wire-cutter or similar device, remove the strapping that secures

the float to the exterior of the SureSite Unit.

- 2 -

Warning

D0 NOT: 1) Hold the SureSite in a vertical position or 2) Drop the float assembly into the unit. Avoid this or any action which could damage or dent the float. Such damage could cause the float to crush under normal working pressures.

TOP

Float

TOP

Float

Weldment

TOP

Flange

Weldment

Remove Bolts

Standard SureSite

Remove Bolts

Mini SureSite

Threaded

End Cap

Plastic SureSite

4. Remove the end cap or flange attaching bolts, as indicated in the appropriate drawing. Then remove

the end cap or flange.

5. With the unit still in a horizontal position, insert the float assembly into the weldment, with the “TOP” indication

on the float assembly moving in the same direction as the “UP” arrows that are located on each side of the

externally mounted flag assembly.

6. With the gasket or O-ring properly positioned, reassemble the end cap or flange to the weldment. Tighten the

end cap or flange bolts securely, using the proper recommended torque value as supplied in Figure A, page 5.

7. Slowly raise the top end of the SureSite, while the bottom end remains on the level surface, permitting the float

to slowly slide to the bottom, avoiding any sudden impact damage to the float assembly.

8. Move the SureSite to the tank and position the unit with the end marked “TOP” pointing upwards. Install any

necessary mounting gaskets or seals

, and align the mating port flanges, NPT’s or connections of the tank with

those of the SureSite. DO NOT ATTEMPT TO FORCE ALIGNMENT. To do so may damage the welds or

compromise the integrity of the SureSite. While following standard practices and procedures, tighten the flange

bolts, NPT’s or connections. Recommended torque values are supplied in Figure A, page 5.

Before Filling the Tank . . . .

Be sure that the installation is free of foreign particles, especially any that are

magnetic. Check that all connections are secure. A hydrostatic pressure test of the complete assembly

is recommended.

NOTE

GEMS recommends that you include at least one support bracket in your installation for SureSite units greater than

10 feet (120 inches, 3048 mm) in length. Depending on the specific installation, a load-bearing support at the base of the SureSite may be beneficial.

______________________________________

Gaskets or seals for the port flanges are not supplied with the SureSite.

- 3 -

Installation for Top-Mounted Alloy SureSites

1. After removing any protective packing materials from your

top-mounted SureSite and positioning it horizontally on a level

surface, remove and discard the protective cap from the bottom of

the SureSite and carefully withdraw the cardboard support tube.

2. Slowly raise the top end of the SureSite, while the bottom end

remains on the level surface; permitting the float to slowly slide to

the bottom and avoiding any sudden impact damage to the float

assembly.

3. Position the necessary gasket or O-ring seal

on the tank mounting

flange and align the unit so that the bolt holes of the mating flange

match. The indicating face of the flag assembly should be directed

towards your desired point of observation. Do not attempt to force

alignment. To do so may damage the welds or compromise the

integrity of the SureSite.

4. While following standard practices and procedures, tighten the

flange bolts with the recommended torque values as supplied in

Figure A, page 5.

Installation for Top-Mounted Plastic SureSites

1. Remove the threaded stop pin from the bottom of the top-mounted

SureSite and slowly withdraw the support tube. Reinstall the stop

pin.

2. Slowly raise the top end of the SureSite, while the bottom end

remains on the level surface; permitting the float to slowly slide to

the bottom and avoiding any sudden impact damage to the float

assembly.

3. Position the necessary gasket or O-ring seal

on the tank mounting

flange and align the unit so that the bolt holes of the mating flange

match. The indicating face of the flag assembly should be directed

towards your desired point of observation. Do not attempt to force

alignment. To do so may damage the welds or compromise the

integrity of the SureSite.

4. While following standard practices and procedures, tighten the

flange bolts with the recommended torque values as supplied in

Figure A, page 5.

_____________________________

Gaskets or seals for the port flanges are not supplied with the SureSite.

- 4 -

Float

Chamber

Cardboard

Support Tube

Protective

Cap

Float

Chamber

Cardboard

Support Tube

Stop

Figure A

(Recommended Torque Values are for Lubricated Threads, Only)

Indicator Type

Fastener

Description

Nominal

Size

Torque Value

Standard Alloy,

Top-Mount Alloy

Standard Plastic,

Top-Mount Plastic

Bolt, Nut

3/8 Inch

1/2 Inch

5/8 Inch

3/4 Inch

7/8 Inch

1 Inch

1-1/8 Inch

70 - 80 Lb.-Inches NTE

(Not to Exceed) 120 Lb.-Inches

30 Lb-Feet

60 Lb-Feet

100 Lb-Feet

150 Lb-Feet

250 Lb-Feet

350 Lb-Feet

15-20 Lb-Feed (Valid for bolts with flat washers under both boltheads and nuts)

Mini

Bolt, Nut

5/16 Inch

70 - 80 Lb-Inches

Flag Installation

General Notes

Under normal circumstances, it should not be necessary to reposition the flag assembly on your SureSite. However, if you find it desirable or necessary to reposition the flag assembly, we strongly recommend that you first mark the distance from the top of the weldment to the top of the flag assembly. Before securing the flag assembly in a new radial position, ensure that the distance from the top of the flag assembly to the top of the weldment is the same as the previously noted dimension. Making a temporary or permanent mark on the weldment can ease the process.

Maintenance

The only maintenance typically required is to ensure that the internal walls of the weldment and the float are free of foreign matter. This may be accomplished by removing the float assembly from the unit and wiping both the float and the inside wall of the float chamber or weldment. Any maintenance interval is to be established by the user of the

SureSite and would depend upon the characteristics of the application. Maintenance could coincide with tank cleaning or flushing.

Float Installation

Mini SureSite Float: (To set magnet position, please go to page 8.)

To accomplish the removal and subsequent reinstallation of the float assembly, follow the appropriate instructions provided on page 6 for the SureSite type and mounting configuration you have selected.

Caution

Make sure that the tank is depressurized and that liquid has been emptied prior to removal of the float assembly.

- 5 -

SureSite with Side Connections (Alloy, Mini and Plastic)

The float assembly can be removed without disturbing the mounting of the SureSite unit to the tank.

1. Carefully remove the end cap (access to the float assembly) which may be retained by bolts, NPT threads

or held in place by setscrews. The float assembly should be resting on the end cap as it is being lowered.

Support the float assembly while setting the end cap aside.

Note: For units supplied with top float access, the float assembly must be extracted from the top of the weldment by engaging the hooking ring provided on the top of the float.

2. Withdraw the float assembly from the unit, exercising caution not to damage the float. Note the “TOP”

indication marking on the float assembly.

3. Wipe down the weldment and the float assembly with a clean, lint-free cloth.

4. Carefully reinsert the float assembly into the weldment, ensuring that the “TOP” indication marking on the

float assembly is positioned in the same manner as when it was removed.

5. Remove the old gasket or O-ring from the end cap assembly and replace it with a new gasket or O-ring.

6. With the new gasket or O-ring properly positioned, reassemble the end cap assembly to the weldment.

Tighten the end cap or secure flange fasteners, using the proper recommended torque value, as supplied

in Figure A -page 5.

SureSite with Top and Bottom Connections (Alloy, Mini and Plastic)

The SureSite unit should be adequately supported when removing it from the tank.

1. Disconnect the top and bottom flange/socket or NPT connections.

2. Remove any other fasteners that retain the unit and/or support bracket(s) to the tank.

3. Remove the SureSite unit from the tank, while avoiding any motion that will cause damage to the float assembly.

4. With the SureSite placed in a horizontal position on a level surface, remove the end cap or flange and withdraw

the float assembly from the unit; noting the relative position of the portion of the float assembly marked “TOP”.

5. Wipe down the weldment and the float assembly with a clean, lint-free cloth.

6. Carefully reinsert the float assembly into the bottom of the float chamber or weldment, ensuring that the “TOP”

indication marking on the float assembly is positioned the same as when it was removed.

7. Remove the old gasket or O-ring from the end cap assembly and replace it with a new gasket or O-ring.

8. With the new gasket or O-ring properly positioned, reassemble the end cap assembly to the bottom of the

weldment. Tighten the end cap or flange bolts securely, using the proper recommended torque value, as

supplied in Figure A, page 5.

9. Complete installation of the unit by following the Installation Instructions for Standard SureSites (Page 3,

Steps 7, 8 and 9).

- 6 -

SureSites Mounted on Top of Tank

The construction of top-mounted SureSites varies with the material selected, and each requires a slightly different procedure than those preceding for “wipe-down”. It is advisable to mark or index mating flanges and other parts so that the relative positions of the components are maintained upon reassembly.

Alloy

1. Remove the attaching bolts that secure the SureSite unit to the top of the

tank. Lift the SureSite vertically from the tank and set it aside on a

level work area, in horizontal position. Exercise caution so that the

float assembly will not be dented or damaged. Remove any gasket

material from the tank and SureSite mounting flanges.

2. Remove the attaching bolts securing the external weldment (with the

attached flag assembly) to the mounting flange that was secured to your

tank, and carefully remove the weldment and gasket from the float

chamber, taking care not to damage the sphere-shaped magnet carrier.

3. While lightly supporting the magnet carrier, remove the upper (first)

cotter pin attaching it to the float rod. Set the magnet carrier and

cotter pin aside.

4. Remove the lower (second) cotter pin from the float rod and set it aside.

5. Withdraw the float and float rod from the bottom of the float chamber.

6. Wipe the inside of the float chamber and the exposed float assembly with

a clean, lint-free cloth.

7. After completing the “wipe-down” cleaning, the unit can be reassembled.

8. Obtain new gaskets for: a) Installation between the weldment and float

chamber

, and b) Installation between the mounting flange

of your tank

and that of the unit. Obtain new cotter pins for the float rod.

9. Insert the float assembly and rod into the float chamber, passing the float

rod up through the opening in the mounting flange. Secure the rod to the

float chamber by installing a cotter pin in the lower (second) hole and

securing it. Reinstall the magnet carrier to the float rod. Insert and

secure a cotter pin in the upper (first) hole to retain it.

10. Complete the remainder of the reassembly and installation by reversing

the process described in Steps 1 and 2. Refer to Figure A, page 5 for

recommended torque values for bolts. Use a new gasket: a) Between

the weldment and mounting flange of the float chamber, and b) Between

the mounting flange of your tank and that of the SureSite unit.

External

Weldment

Attaching

Bolts

Cotter

Pins

Float

Chamber

Flag

Assembly

Gasket

Magnet

Carrier

Float Rod

Mounting

Flange

Float

Protective

Cap

_____________________________________________

Contact Gems Sensors for spare or replacement parts

Customer-Supplied

- 7 -

External

Weldment

Mounting

Flange

Float

Chamber

Stop Pin

Flag

Assembly

Magnet

Carrier

Float

Hold the float vertical. A paper clip will attach to the magnet to show its position. Adjust the magnet position by gently tapping the end of the float.

Plastic

1. Remove the attaching bolts that secure the SureSite

unit to the top of the tank and lift the indicator unit

(with its float chamber) vertically from the tank. Set

it aside on a level work area, horizontally. Handle

the float assembly with care to prevent damage.

Remove any gasket material from the tank and

SureSite mounting flanges.

2. Unscrew and remove the stop pin from the bottom of

the float chamber.

3. Carefully withdraw the float, float rod, and attached

magnet assembly from the bottom of the float

chamber.

4. Wipe the inside of the float chamber and the exposed

float assembly with a clean, lint-free cloth.

5. After completing the “wipe-down” cleaning, the unit

can be reassembled. Obtain a new gasket for

installation between the mounting flange of your tank

and that of the SureSite unit. Prepare the mating

surfaces for reassembly.

6. Insert the float assembly and rod into the float

chamber, passing the magnet assembly and float rod

up through the bottom of the float chamber. Secure

the float assembly and rod to the float chamber by

reinstalling the stop pin.

Basic Float Part No. 807100

(Liquid Specific Gravity Range: 0.8 to 1.2)

Float

Part Number

85206

83453

85208

85209

84158

Liquid

Specific

Gravity

0.8

0.9

1.2

0.85

“X”

Dimension

5”

4.5”

4”

3.312”

4.75”

Float Part No.

W/Lift Ring

810919

810917

810916

810915

810918

Basic Float Part No. 807200

(Liquid Specific Gravity Range: 1.5 to 3.8)

Float

Part Number

88111

801708

Liquid

Specific

Gravity

1.9

1.5

“X”

Dimension

2”

2.6875”

Float Part No.

W/Lift Ring

810928

810927

TOP

807200

“X”

Dimension

“X” Dimension

TOP

807100

- 8 -

Condition

No change in Media

Level Indication

Incorrect Fluid Level

Indication

Incorrect Color

Indicating Fluid Level

Troubleshooting

Possible Cause

No Float

Float sticking, due to contamination in the fluid level

Float attracted, due to external ferrous materials within close proximity.

The float is damaged

Port is blocked

Float attracted, due to contamination in the media

Float sticking, due to external ferrous materials within close proximity

The float is damaged

The float is upside down

Flag assembly is upside-down.

(The wrong color is indicating the liquid level)

Solution

Install float

Clean the float and weldment

Remove the ferrous materials from close proximity

Replace the float

Remove blockage

Clean the float and weldment

Remove the ferrous materials from close proximity

Replace the float

Invert the float

Rotate the flag assembly 180 degrees (with the end marked

“TOP” uppermost)

Note: Increased viscosity increases the response time of the SureSite indicator

Warnings/Cautions

1. The SureSite Magnetic Level Indicator must be maintained and installed in strict accordance with this Instruction Bulletin. Failure to observe this warning could result in serious injuries or damages.

2. The liquids to be monitored must be compatible with the materials of construction. Specifications of these materials will be provided upon request.

- 9 -

SureSite

Magnetic Liquid Level Indicator

Installation, Operation and Maintenance

Bulletin No. 177664-2 (Rev. B)

Section 2: Switches

Operation

The SureSite Switch Module, available for use with the SureSite Magnetic Liquid Level Indicator, is a sealed assembly containing a magnetically actuated “latching-reed” switch assembly. The reed switch is actuated by the movement of the magnet contained in the SureSite float. The design of the reed switch permits the switch module to perform as either a “normally open” or “normally closed” switch. When installed with the lead wires (or junction box) installed at the top, the switch module is “normally open” and the reed switch will close with the rising fluid level in the tank; remaining closed until a falling fluid level in the tank causes the float to drop below the indicating position, opening the reed switch. When installed with the lead wires (or junction box) at the bottom, the switch module is “normally closed” and the reed switch will open with the rising fluid level in the tank, and remain open until a falling fluid level in the tank causes the float to drop below the indicating position, closing the reed switch. (See sketches below)

For electrical schematics of the switch module, please refer to the Wiring Diagrams, located on pages 5 and 6.

Lead W ires and Junction Box Positioned at T op Lead W ires and Junction Box Positioned at Bottom

Installation

General: The SureSite switch module must be mounted 180 o

opposite the flag assembly of the SureSite Magnetic

Level Indicator and within its operating range. The installation of the switch module varies, depending on the switch module housing and the type of SureSite Magnetic Level Indicator. The chart on the next page is intended to provide an overview of the various switch modules and to indicate which diagram(s) should be referred to for installation instructions.

1 of 6

Installation (Cont.)

If it is necessary to locate two switch-points close together, two switch modules can be positioned side-by-side and located 180 o

opposite of the flag assembly, as shown.

Flag

Assembly

T op V iew

T ype T emp (°F / °C)

Bracket / Spacer

Block

Clamp J-Box

85350

86435

86567

87480

80469

83140

83150

84320

803430

83100*

83110*

83120*

83130*

84330

Standard

Mini

Mini / Plastic

Plastic

All

20 VA SPST, N.O. or N.C.

300 / 148

20 VA SPST, N.O. or N.C.

300 / 148

20 VA SPST, N.O. or N.C.

300 / 148

High T emperature

20 VA SPST, N.O. or N.C.

20 VA SPDT, N.O. or N.C.

750 / 398

Incl.

220 VDC, 5 Amp 750 / 398 Incl.

Explosion-Proof / High T emperature

N/A

120 VDC, 10 Amp

24 VDC, 10 Amp

20 VA SPST, N.O. or N.C.

20 VA SPDT, N.O. or N.C.

750 / 398

Incl.

N/A

Incl.

N/A

Incl.

N/A

Incl.

N/A

Polysulfone

Incl.

316 SS

Explosion-proof for Class 1, Division 1, Groups C & D and Class 1, Division 2, Groups B, C & D; Dust ignition proof per Class

2, Division 1, Groups E, F & G and suitable for Class 3, Division 1, Hazardous Location, Indoors (Ref. File #J.I. 0A8A3.AE).

Also CSA certified for Class 1, Division 1, Groups B, C & D (Ref. Files LR22666-22 and LR22666-24).

For Standard Unit installation instructions, see Mounting Diagram “A”

For all other part numbers listed above, see Mounting diagram “B”, “C” or “D”

2 of 6

Standard SureSite

Switch Part Numbers

80469, 85350, 86435, 86567, 87480

1. Position the switch module 180° from the flag assembly and within indicating range.

2. Slide the switch clamp between the flag assembly and the weldment of your

SureSite Magnetic Level Indicator.

3. With the switch module located at the desired fluid level, tighten the clamp screw securely; not to exceed a torque of

10 lb-inches.

4. Connect the switch module leads to the load circuit.

1. Position the switch module 180° from the flag assembly and within indicating range.

2. Slide the tabs of the switch clamps between the flag assembly and the weldment of the Mini SureSite Magnetic

Level Indicator; wrapping the retaining screw-end around the upper and lower stem of the switch, as shown.

3. With the switch module located at the desired fluid level, tighten the clamp screw securely; not to exceed a torque of

120 lb-inches.

4. Connect the switch module leads to the load circuit.

Switch

Part Numbers

83100, 83110,

83120, 83130.

83140, 83150,

84320, 84330

Switch

Part Numbers

83150, 84320

Mini SureSite

1-1/4”

O.D.

Tubing

Flag

Assembly

ÕÕÕÕÕ

2-1/2”

Ref.

Switch

Module

#24 Clamp

(P/N 85576)

-2 Required

Flag

Assembly

ÕÕÕÕÕ

2-1/2”

Ref.

1-1/4”

O.D.

Tubing

Switch

Module

#24 Clamp

(P/N 85576)

-2 Required

J-Box Not

Included

On Type

83140

3 of 6

Mounting Diagrams (Cont.)

1. Slide the switch into the support bracket.

2. Position the switch module 180° from the flag assembly and within indicating range.

3. Slide the switch clamp between the switch bracket and the stem of the switch, then between the flag assembly and the weldment of your SureSite

Magnetic Level Indicator.

4. With the switch module located at the desired fluid level, tighten this clamp screw securely, not to exceed a torque of 120 lb-inches.

5. Connect the switch module leads to the load circuit.

1. Slide the switch into the plastic spacer block.

2. Position the switch module 180° from the flag assembly.

3. Slide the tabs of the switch clamps between the flag assembly and the weldment of your SureSite Magnetic

Level Indicator, wrapping the retaining screw-ends around the stem of the switch, above and below the spacer block and the desired indication/activation level, as shown.

4. With the switch module located at the desired fluid level, tighten both clamp screws securely, not to exceed a torque of

120 lb-inches.

5. Connect the switch module leads to the load circuit.

Switch

Part Numbers

83100, 83110,

83120, 83130.

83140, 83150,

84320, 84330

Alloy SureSite

Tubing or

Pipe

Flag

Assembly

#48 Clamp

(P/N 85577)

J-Box Not

Included

On Type

83140

Switch

Module

Flag

Assembly

Tubing or

Pipe

Switch

Part Numbers

83150, 84320

Switch

Module

Switch

Part Numbers

83100, 83110,

83120, 83130.

83140, 83150,

84320, 84330

#48 Clamp

(P/N 85577)

Plastic SureSite

Tubing or

Pipe

Flag

Assembly

#48 Clamp

(P/N 85577)

Switch

Module

P/N 802265

Spacer Block

J-Box Not

Included

On Type

83140

Switch

Part Numbers

83150, 84320

Tubing or

Pipe

Flag

Assembly

#48 Clamp

(P/N 85577)

Switch

Module

P/N 802265

Spacer Block

4 of 6

80469, 87480, 85350, 86435, 86567

R E D

S P S T, N.O. or N.C. (Dry)

Wiring Diagrams

120 VA C

- Dry Condition -

Y E L L O W

G R E E N

B L U E

O R A N G E

B R O W N

W H I T E

24 VDC

Part Number 831

- Dry Condition -

83120, 83140, 83150

- Dry Condition -

2-COND.

C A B L E

Y E L L O W

G R E E N

B L U E

O R A N G E

B R O W N

W H I T E

- Dry Condition -

84320, 84330 DPDT

- Dry Condition / J-Box at Top -

3-PIN

T E R M

3-PIN

TERM.

3-COND.

C A B L E

5 of 6

Wiring Diagrams (Cont.)

84320, 84330

- Dry Condition / J-Box at BTM -

3-PIN

TERM.

3-COND.

C A B L E

Switch Module Troubleshooting

Intermittent Switching or

Not Latching

Switch Not Switching

Switch Remains Open or

Closed At All times

Positioned Incorrectly

Switch not in Indicating Range

Incorrect Mounting Hardware

Incorrect Wiring Between

Switch & Load

Positioned Incorrectly

Switch Not in Indicating Range

Incorrect Mounting Hardware

Incorrect Wiring Between

Switch & Load

Switch Rating Exceeded

Reposition Switch Modules

See Appropriate Mounting Diagram

Correct Wiring

(See Wiring Diagrams)

Reposition Switch Modules

See Appropriate Mounting Diagram

Correct Wiring

(See Wiring Diagrams)

Replace Switch

(See Appropriate Rating Diagram)

6 of 6

SureSite



Magnetic Liquid Level Indicator

Installation, Operation and Maintenance

Bulletin No. 177664-3

Rev. E

Section 3: Transmitters

Operating Principle

The Gems SureSite Transmitter is a 3-wire device, externally mounted on the Gems SureSite Magnetic Level

Indicator. The maximum and minimum level indication position is marked on the transmitter housing. The

maximum indicator mark is red; the minimum indicator mark is blue.

The SureSite Transmitter is a voltage divider which extends the full length of visual indication, consisting of magnetic reed switches tapped in at regular intervals. As the SureSite float moves with the liquid level, it magnetically closes a series of staggered reed switches in a sequence that varies the resistance. A regulated

DC voltage applied to this voltage divider network will result in a proportional voltage output.

Standard

Transmitter

High Temp

EP Transmitter

2-Pc. High Temp

EP Transmitter

Mini

Transmitter

Body Material

Rated Temperature

(Process Media)

Black Polysulfone Plastic

300°F, 148°C

750°F, 398°C

316 SS

300°F, 148°C

Max. Ind. Length

276 “ (701 cm) 120 “ (305 cm)

240 “ (610 cm)

180 “ (457 cm)

Input Voltage

10 - 30 VDC

3/8”

Resolution

Mounting

Location / Position

(From Flag Ass’y

Standard Tubing / 90°

Standard Pipe / 125°

Plastic / 90°

Standard Pipe / Adjacent

180°

Standard Pipe / Adjacent

1234567890123456789012345678901212345678901234567890123456789

Installation

- Figure A -

Gems SureSite transmitter is typically installed on the SureSite Magnetic Level Indicator at the factory; however, if you purchased your transmitter separately, refer to Figure A above. Read all information carefully, before beginning installation.

*** Warning: To prevent ignition of flammable or combustible atmospheres, disconnect power before servicing.

Standard Transmitter

Rotational Positioning

1. The SureSite transmitter is externally mounted and positioned either to the left or right of the flag

assembly, per Figure A.

2. Using the alignment guide (supplied), determine if the existing flag assembly position can be used or if

the flag assembly needs to be rotated to accommodate the transmitter. (See Figure B)

3. Using the flag assembly as a reference, position the SureSite transmitter using the red (maximum)

and blue (minimum) indication marks. Each indication mark should be placed approximately the same

distance from the top and bottom of the flag assembly.

1 of 6

Rotational Positioning (Cont.)

4. Outline the location of the transmitter and flag assembly on the SureSite

housing.

5. Loosen the clamps around the flag assembly to allow for installation of

the transmitter clamps. The flag assembly clamps should only be

loosened enough to permit the transmitter clamps to be inserted between

the flag assembly and the SureSite housing.

6. Install the transmitter and loosely clamp it in the location

outlined in step 4.

7. Tighten flag assembly clamps. Do not exceed 5 lb-inches.

8. Verify that the red (maximum) and blue (minimum) indication marks are

centrally located between the ends of the flag assembly.

9. Using the alignment guide, verify that the SureSite transmitter is

positioned correctly in relation to the flag assembly. Reposition if necessary.

10. Tighten the transmitter clamps securely. Do not exceed 5 lb-inches.

11. Wire to appropriate signal conditioner/converter or controller.

Note

To ensure continuous electrical output, the transmitter must lay flat against the SureSite housing over the entire length.

90° Must

Be Maintained

Max. Ind.

Mark (Red)

Min. Ind.

Mark (Blue)

- Figure B -

Max. Ind.

Mark (Red)

High Temp/Explosion-Proof Transmitter

Rotational Positioning

1. The high temperature/explosion-proof SureSite transmitter is externally mounted and positioned either to the left or right of the flag assembly, per Figure A.

2. Using the flag assembly as a reference, position the high temperature/explosion-proof SureSite transmitter using the red (maximum) and blue (minimum) indication marks. Each indication mark should be placed approximately the same distance from the top and bottom of the flag assembly.

3. The high temperature/explosion-proof SureSite transmitter is secured to the SureSite Magnetic Level Indicator housing using two mounting clamps. One clamp is positioned at the top of the high temperature/explosion-proof transmitter and the other clamp is positioned at the bottom. Position clamps as shown in the Figure C.

4. Tighten clamps securely.

Min. Ind.

Mark (Blue)

- Figure C -

2 of 6

2-Piece Transmitter - High Temperature/Explosion-Proof

Rotational Positioning

1. The 2-section high temperature/explosion-proof SureSite transmitter is externally mounted to the left

or right of (and adjacent to) the flag assembly and is positioned with the transmitter standoffs against

the SureSite weldment or housing. The lower section mounts to the right of the flag assembly - the

upper section mounts to the left; as indicated in Figure D.

2. Taking the upper section of the high temperature/explosion-proof SureSite transmitter and using the

flag assembly as a reference, position the transmitter section so that the red (maximum) indication

mark is one 1” below and to the left of the top of the SureSite flag assembly.

3. Loosely clamp the upper section of the high temperature/explosion-proof SureSite transmitter by

placing one clamp around the top and bottom of the transmitter section at the same location as the

transmitter standoffs. (See Figure D)

4) Taking the lower section of the high temperature/explosion-proof

SureSite transmitter and using the flag assembly as a reference,

position the transmitter section so that the blue (minimum)

indication mark is 1” above and to right of the bottom of the

SureSite flag assembly.

5. Loosely clamp the lower section of the high temperature/explosion-

proof SureSite transmitter by placing one clamp around the top and

bottom of the transmitter section at the same locations as the

transmitter stand-offs. (See Figure D)

6. If the blue (minimum) indication mark of the upper section and the

red (maximum) indication mark of the lower section (the centered

indication marks) are not aligned as shown in Figure D, reposition

both sections by sliding each section of the transmitter up or down

equally.

7. With the centered indication marks aligned, verify that the red

(maximum) indication mark of the upper section and the blue

(minimum) indication mark of the lower section are centrally

located between the top and bottom of the SureSite flag assembly.

Max. Ind.

Mark (Red)

Min. Ind.

Mark (Blue)

Max. Ind.

Mark (Red)

Note

If the red (maximum) and blue (minimum) indication marks are not centrally located between the top and bottom of the SureSite flag assembly, reposition the transmitter accordingly.

Min. Ind.

Mark (Blue)

- Figure D -

*Reminder*

The centered indication marks must remain aligned as shown for continuous indication.

8. Tighten clamps securely.

9. Wire per supplied diagram. Due to many different wiring combinations for the 2-piece high

temperature/explosion-proof SureSite transmitter, the wiring diagram is supplied with the unit.

If using a Gems explosion-proof SureSite transmitter, use the appropriate wiring method (per

N.E.C. Article 500).

3 of 6

Mini-Transmitter

Rotational Positioning

1. The Mini-SureSite transmitter is externally mounted and

positioned 180° from the SureSite flag assembly, per

Figure E.

2. Before installing the Mini-SureSite transmitter on your

SureSite Magnetic Level Indicator, outline the location of the

flag assembly on the indicator housing.

3. Remove the existing flag assembly clamps from the flag

assembly, one at a time. Replace these clamps with the new

flag assembly/transmitter clamps provided. When replacing

the old flag assembly clamps with the new flag assembly/

transmitter clamps, the Mini-Transmitter should be loosely

clamped 180° from the flag assembly. The new clamp secures

both the Mini-SureSite transmitter and the SureSite flag

assembly.

4. With all the clamps replaced, reposition the flag assembly to

the previously outlined location. Also, vertically position the

Mini-SureSite transmitter so that the red (maximum) and

blue (minimum) indication marks are centrally located

between the top and bottom of the SureSite flag assembly.

5. Verify that the Mini-SureSite transmitter is 180° from the

flag assembly. Reposition as necessary.

6. Tighten the flag assembly/transmitter clamps securely.

Do not exceed 5 lb-inches.

Max. Ind.

Mark (Red)

Min. Ind.

Mark (Blue)

- Figure E -

Service

Because the transmitter is not field-serviceable, the unit must be returned for repair or replacement.

4 of 6

Condition

No Output or

Loss of Signal

Transmitter Troubleshooting

Possible Cause

Positioned Incorrectly

Incorrect Wiring Between

Transmitter & Load

Transmitter Faulty

*

Solution

Reposition Transmitter

(See appropriate installation section)

Correct Wiring

(See wiring diagrams)

Repair or Replace

Transmitter

*

To Determine if Your Transmitter is Faulty:

1. Disconnect the transmitter from the signal conditioner/converter or controller.

2. With an ohmmeter, check the total resistance between the red and black wire of the high temperature/

explosion-proof Suresite transmitter. The resistance should read typically between 1200W and 1600W.

- If the resistance between the red and black wires reads as an open, contact Gems Sensors for

further assistance.

- If the resistance total between the red and black wires is verified, the SureSite float must be

removed from the SureSite magnetic level indicator. If you are unable to remove the float from

your Suresite,you must remove the transmitter from the Suresite housing.

3. With an ohmmeter, check the resistance between the red and white & the black and white wires of the

high temperature/explosion-proof SureSite transmitter. The resistance between both sets of wires should

read

∞

Ω.

If you are reading any resistance across either set of wires other than

∞

Ω,

contact Gems Sensors

for further assistance.

4. If all of the resistance readings and the transmitter’s position are verified as correct, but the SureSite

transmitter is still not operating correctly, contact Gems Sensors for further assistance.

If Your 2-Piece Transmitter is Faulty, Follow the Steps Below to Determine Which Section

to Replace:

1. Disconnect the upper section from the lower section of the 2-piece high temperature/explosion-proof

Suresite transmitter.

2. With an ohmmeter, check the total resistance between the red and black wires of the upper section

of the 2-piece high temperature/explosion-proof SureSite transmitter. The resistance should read

typically between 600 Ω and 800Ω. If the resistance between the red and black wires reads as an open,

contact Gems Sensors for further assistance.

If the resistance total between the red and black wires on the upper section is verified:

3. With an ohmmeter, check the total resistance between the red and black wires of the lower section

of the 2-piece high temperature/explosion-proof SureSite transmitter. The resistance should read

typically between 600

Ω

and 800

Ω

. If the resistance between the red and black wires reads as an

open, contact Gems Sensors for further assistance.

5 of 6

If the resistance total between the red and black wires on the lower section is verified:

4. The SureSite float must be removed from the Suresite magnetic level indicator. If you are

unable to remove the float from your SureSite, you must remove the transmitter from the

SureSite housing.

5. With an ohmmeter, check the resistance between the red & white and the black & white wires of the upper

section of the 2-piece transmitter. The resistance between both sets of wires should read

∞

Ω. If you are

reading any resistance across either set of wires other than

assistance.

∞

Ω, contact Gems Sensors for further

If the resistance total between the red and black wires on the upper section is verified:

6. With an ohmmeter, check the resistance between the red & white and the black & white wires of the lower

section of the 2-piece transmitter. The resistance between both sets of wires should read

∞

Ω. If you are

reading any resistance across either set of wires other than

assistance.

∞

Ω, contact Gems Sensors for further

7. If all of the resistance readings and the transmitter’s position are verified as correct, but the

SureSite transmitter is still not operating correctly, contact Gems Sensors for further assistance.

6 of 6

Bulletin No. 177664-4 (Rev . E)

Signal conditioners provide a regulated output (voltage or current) when used with Gems SureSite transmitters.

The signal conditioner is housed within a junction box with two or three ports. The ports allow for mounting and customer wiring. Your signal conditioner’s part number can be found on the identification plate located on the back of the junction box. Your unit has the operating and electrical characteristics indicated in the chart (for reference purposes) below:

Input V oltage

T ransient V oltage ith T ransmitter

86156

85997

0 to 5 VDC

0 to 12 VDC

8 to 24 VDC

15 to 30 VDC

± 0.4% of Full

Scale or ± 1” -

- Whichever is greater

4K Ohms/V Max

(.25 mA)

Metal Oxide Varistor

Rated @ 30 VDC

2K Ohms/V Max

(.5 mA)

Metal Oxide Varistor

Rated @ 38 VDC

86157

* 0 to 12 VDC

20 to 30 VDC

86158

112300

4 to 20 mA

10 to 40 VDC

± 1.0% of Full

Scale or ± 1” -

- Whichever is greater

Range:

100 - 1200 Ohms

4 to 20 mA

152800

Note

1. Lower Alarm Point for P/N 86157 varies. The default setting is 2% to 50% of full scale.

2. Upper Alarm Point for P/N 86157 varies. The default setting is 50% to 98% of full scale.

Metal Oxide Varistor

Rated @ 68 VDC

250 Amps

86158, 1 12300,

SureSite transmitter readings. Converter calibration can be accomplished, using your transmitter or a transmitter simulator.

Calibration is simplified when using a transmitter simulator in place of the SureSite transmitter. Because the output voltage of the signal conditioner is stepped down to a fixed DC voltage, the transmitter and the transmitter simulator act as identical electrical loads, as interpreted by the converter.

For the purpose of calibration, rotating the shaft (wiper) of the transmitter simulator performs the same function as moving the SureSite float up and down inside the weldment.

In each case, the changing resistance will provide the proper output to calibrate the signal conditioner.

A transmitter simulator has been supplied with your converter/signal conditioner.

1 of 7

Minimum Excitation Required for Loop Resistance

200

400 600 800

1000 1200

R (Ohms) Termination Plus DC Loop Resistance

Installation Precautions and Preparations

W ith the exception of P/N 112300, all signal conditioners are typically installed on the SureSite magnetic level indicator at the factory. For those units so designated, the customer will have to provide electrical grounding, with an effective resistance of 1

W or less. Please refer to the Wiring Diagram(s) for your particular signal conditioner part number. Calibration of the signal conditioner can be accomplished using your SureSite transmitter or the transmitter simulator (supplied).

Terminal Blocks

(Ref.)

+8 to 24 VDC

#2 Rm

Transmitter

Blk

Wht

Red

1 1

Terminal Blocks (Ref.)

+15 to 30 VDC

#2 Rm

Transmitter

Blk

Wht

Red

1 1

#1: Remove wire from terminal 9 and connect it to

terminal 8 to provide “full” reference of the system.

#2: Output signal loading (Rm): 4K Ohms/V Max

(.25 mA)

#1: Remove wire from terminal 9 and connect to

terminal 8 to provide “full” reference of the system.

#2: Output signal loading (Rm): 2K Ohms/V Max (.5 mA)

The signal conditioner is typically installed on the SureSite magnetic level indicator at the factory.

If your signal conditioner was purchased separately, you may use one of the ½” FNPT ports for mounting.

None. Both of these units are calibrated at the factory.

2 of 7

This unit contains two relays intended to provide a high and low alarm signal for process control. These relays are

K1 and K2, respectively, in the wiring diagram. Standard alarm functions are K1 (High Alarm) and K2 (Low Alarm).

Other configurations are available upon request. Unless specified otherwise, the trip-point for the Low Alarm relay has been set at 5% of full scale, while that of the High Alarm relay has been set at 95% of full scale.

+20 to 30 VDC

- +

#2 Rm

High

Low

High

Low

- W iring Diagram -

Terminal Blocks (Ref.)

Alarm Contacts Shown

With Relay De-energized

#1: Remove wire from terminal 9 and

connect to terminal 8 to provide

“full” reference of the system.

#2: Output signal loading (Rm):

2K Ohms/V Max (.5 mA)

Transmitter

Blk

Wht

1 1

86157 Signal Conditioner is typically installed on the SureSite magnetic level indicator at the factory. If your signal conditioner has been purchased separately, you may use one of the ½” FNPT ports for mounting.

None. This unit is calibrated at the factory. If it is necessary to change the high and/or low alarm settings, you may follow the procedure provided below.

The alarm trip-points are adjusted by means of two separate twenty-turn potentiometers, through either the upper or lower 50% of the indicated range. The approximate set-point adjustment can be made by counting the number of revolutions from the end-stops of the pots. As a general ‘Rule of Thumb,’ you may expect 2.5% of the indicated range per turn. After you have established the desired trip-point(s) for the alarm relay(s), the adjusting knob(s) may be fixed with a small amount of RTV or other semi- permanent material.

3 of 7

Standard

Transmitter

See

Detail

“A”

Span Adjust

Null Adjust

SureSite

V isual Indicator

HEX Nut

#8-32

Flat Washer

P.C. Board

Spacer

Threaded

Rod

Detail “A” - P .C. Board Mounting

(T yp. 3 Places)

Span Adjust

Potentiometer oltage to Current Converter

Null Adjust

Potentiometer

The calibration procedure should be conducted with a potentiometer (transmitter simulator) which has a resistance value of

1.0 k Ohm , minimum, to a maximum of 2.5 k O h m . The transmitter simulator supplied with the signal conditioner has an adjustment range of 0 to 1000 ohms.

Maximum

Indication

Mark (Red)

High T emperature T ransmitter

2. Set and apply the D. C. power supply voltage at 24 VDC, with a 250 Ohm load resistance, as shown.

3. Adjust the span and null potentiometers at approximately mid-range.

4. Set the transmitter/simulator potentiometer adjusting screw to its fully clockwise position, for a maximum

indication on the digital multimeter (DMM).

5. With the span adjust potentiometer (see illustration), set the output current to 20 mA.

6. Turn the transmitter/simulator potentiometer adjusting screw to its fully counter-clockwise position, for a

minimum indication on the DMM.

7. With the null adjust potentiometer, set the output current to 4 mA.

8. Repeat steps #4 through #7 for the final fine adjustment. No further adjustments will be required.

9. After calibration, the converter/signal conditioner can be mated permanently to the transmitter assembly.

Any adjustments for null and span (4mA & 20 ma), due to D. C. loop resistance, are achieved by adjusting

the potentiometer screws

4 of 7

T ransmitter d m m

.C. Board

- W iring Diagram -

4-20 mA T

O +V A

V oltage

Installation Specifics

The signal conditioner is typically installed on the Gems SureSite magnetic level indicator at the factory. If your signal conditioner was purchased separately, you may use one of the FNPT ports for mounting.

5 of 7

Signal Conditioner Part Number 1 12300 (4 to 20 mA)

- Panel Mounted V ersion -

This unit incorporates a Linear Voltage to Current Converter.

- T op V

Red

- Calibration Wiring Diagram -

White

Black

P.C.

Board

Source

250

DMM

Transmitter

4 to 20 mA

Tank Level Transmitter

Process

Control

Loop

Calibration Requirements

The calibration procedure should be conducted with a potentiometer (transmitter simulator) which has a resistance value of 1.0 k

minimum to a maximum of 2.5 k

. The transmitter simulator is supplied.

Calibration Procedure

Note: Calibration should be performed with the signal conditioner

disconnected from the SureSite transmitter.

1. Make connections as shown in the Calibration Wiring Diagram with the power supply turned off.

2. Set and apply the D.C. power supply voltage at 24 VDC with a 250

load resistance, as

shown in the diagram.

3. Adjust both the span and null potentiometers at approximately mid-range.

4. Set the transmitter/simulator potentiometer adjusting screw to its fully clock-wise position,

for a maximum indication on the digital multimeter (DMM).

5. With the span adjust potentiometer screw (see “Top View” diagram above), set the output

current to 20.00 mA.

6. Turn the transmitter/simulator potentiometer adjusting screw to its fully counter-clock-wise

position, for a minimum indication on the DMM.

7. With the null adjust potentiometer (see “Top View” diagram above), set the output current

to 4.00 mA.

8. Repeat steps 4 through 7 for the final fine adjustment. No further adjustments will be

required.

9. After calibration, the converter/signal conditioner can be installed at the desired location.

Any adjustments for null and span (4.00 & 20.00 mA), due to DC loop resistance, are

achieved by adjusting the potentiometer screws.

6 of 7

Installation Specifics

The panel-mount design of this unit permits remote installation. For mounting purposes, it is possible to remove the body of the unit from the terminal base. This permits the terminal base to be installed on two

3/16” studs or with two 3/16” screws, at the slotted holes provided. After installation of the terminal base, reinstall the body of the unit in its socket.

- Wiring Diagram -

Transmitter

Wht

Red

Blk

+ V

Source

4-20 mA Loop

- Signal Conditioner T roubleshooting -

No Output

Loose or Improperly Connected

W ires At Terminal Screws

Incorrect Wiring

Transmitter Positioning Incorrect

High or Low Alarm Points

Not Alarming at Desired

Setpoints

Alarm Setpoints Incorrect

Correct Connections

Correct Wiring (See Wiring Diagrams)

See SureSite Transmitter

Troubleshooting Section

Recalibrate Alarm Setpoints

(See Calibration Procedure)

7 of 7

SureSite

Magnetic Liquid Level Indicator

Installation, Operation and Maintenance

Bulletin No. 177664-5

Section 5: Power Supplies

The SureSite power supply is designed to provide regulated DC input voltage when only AC voltage is available.

This DC voltage can be used to supply the required input voltage to the Gems signal conditioner. Designed to accept a nominal 115 VAC or 230 VAC input (depending upon the unit ordered), the power supply’s output is 50 mA at 24

VDC, nominal. The power supply has an operating temperature range of -15°C to +70°C (-5°F to +158°F) and its output is thermally and short circuit protected against damage.

Installation

In most cases, the power supply is attached and wired to the signal conditioner at the Factory; requiring only to be wired to your AC voltage source. You may utilize any of the junction box 1/2” NPT ports to mount the unit in a fixed position.

- T ypical Installation -

1. With the power turned off and the circuit disabled, remove the cover from the junction box housing of the power supply, and remove the thread protector from the port you have selected for wiring. (See Installation Diagram).

Transmitter

4 to20mA Signal Conditioner

Power

Supply

2. Run your voltage source wiring through the appropriate strain relief device

1 junction box.

and into the

1/2” NPT

Nipple

- W iring Diagrams -

1 2 3 4

Out

2 3

230 VA C

Out

115

VA C

Ground

P/N 52560 - 1 15 V A C

P/N 52570 - 230 V A C

Negative output is not junction box grounded. A ground may be made, if required.

3. For 115 VAC Input Only

Connect your wiring to terminals 1 and 2 of Terminal Block-1. (See the wiring diagram for your

power supply.)

4. For 230 VAC Input Only

Connect your wiring to terminals 1 and 4 of Terminal Block-1. (See the wiring diagram for your power supply.)

Not

1 of 2

5. If your power supply is remotely mounted and has not been connected to the signal conditioner: a) Remove the thread protector(s) from the ports b) Connect the lead wires to the power supply output terminals. Run the wires through appropriate strain relief device(s)

and into the signal conditioner. (See the “Power Supply to Signal Conditioner” sketch.) c) See the appropriate signal conditioner wiring diagram for proper wiring instructions.

6. Reinstall the cover with its required O-ring on the junction box.

7. Enable the circuit and turn power on.

Signal

Conditioner

Power Supply Troubleshooting

24 VDC

Output Bad

Input Voltage Not Correct

Incorrect Wiring Between Signal

Conditioner and Power Supply

Loose or Improperly Connected

W ires at Terminal Screws

Apply the Proper Input Voltage

- 115 VAC or 230 VA C

Correct Wiring

(See Appropriate Wiring Diagrams)

Correct Connections

Blk

Red

Power

Supply

The Strain Relief Device is Not

2of 2

P/N 177664-5

Rev

. B

This Indicating Scale provides a numerical readout of the liquid level in the tank, in addition to the visual level displayed by the flag assembly. The indicating scale is mounted alongside the flag assembly with special clamps. The scale is normally graduated in inches and feet, but may be graduated in other dimensional or volumetric units. Scales that have an overall length of more than 24 inches will be provided in two or more sectional lengths.

Side V iew

Front V iew

Scales ordered with the SureSite Magnetic Level Indicator are factory-installed. If ordered separately, please follow the instructions below.

The scale is simply installed on your SureSite Magnetic Level Indicator using the bracketed clamps supplied.

1. Attach the scale onto the SureSite Magnetic Level Indicator, wrapping the clamps

around the flag assembly and the weldment.

2. Tighten the clamps securely, with a torque not to exceed 5 lb.-inches.

P/N 177664-6

Rev. B

SureSite

Magnetic Liquid Level Indicator

Installation, Operation and Maintenance

Bulletin No. 177664-7 (Rev A)

Section 7: Insulation Blankets

I n s t a l l a t i o n

Insulation Blankets are provided to minimize the possibility of personal injury and heat loss. Blankets have been designed for various SureSite Magnetic Level Indicators and mounting configurations, as indicated below:

Indicator Type

Mini

Standard

Mounting Configuration

Top and Bottom Mount

Side Mount

Top and Bottom Mount

Side Mount

Side Mount with Switches

Description

1-Piece

2-Piece

1-Piece

3-Piece

4-Piece

Cable Tie

Insulation

Blanket

M i n i - S u r e S i t e

- Top and Bottom Mount

(1-Piece Blanket)

The optional Heat Trace cable should be installed according to the supplied instructions prior to wrapping the Insulation

Blanket around the SureSite,as described below:

1. Wrap the long section of the Insulation

Blanket around the SureSite Magnetic

Level Indicator so that the area on either

side of the flag assembly is covered. The

flag assembly alone remains visible.

2. Using non-ferrous lock-wire, secure the

Insulation Blanket to the Mini-SureSite

at intervals of approximately 12 inches

(30 cm), as shown in the illustration.

Twist the wire ends to secure.

(See Figure A)

Heat Portion of Heater

Cable to be approx. XXX from Flag Assembly.

(Either side of flag assembly is fine.)

Cable Tie

Heat Cable

Extended Length

SureSite with

Optional Heat Trace

- Figure A -

1 of 3

SureSite with

Heat Trace & Insulation

M i n i - S u r e S i t e

Side-Mount

(2-Piece Blanket)

The optional Heat Trace Cable should be installed according to the supplied instructions prior to wrapping the insulation blanket around the SureSite, as described in the instructions below:

1. Wrap each of the two long sections of the insulation blanket around half of the SureSite Magnetic Level

Indicator so that the areas between the side connections and the flag assembly are covered. The flag

assembly remains visible.

2. Using non-ferrous lock-wire, secure the insulation blanket to the Mini-SureSite at intervals of

approximately 12 inches (30 cm), as shown in Figure A. Twist the wire ends to secure.

Standard SureSite

Top and Bottom Mount

(1-Piece Blanket)

The optional heat trace Cable should be installed according to the supplied instructions prior to wrapping the insulation blanket around the SureSite, as described below.

1. Wrap the long section of the insulation blanket around the SureSite, so that the area on either side of

the flag assembly is covered. The flag assembly alone remains visible.

2. Using non-ferrous lock-wire, secure the insulation blanket to the SureSite, as shown in the illustration

below (Figure B), at the “hog-ring”locations. Twist the wire ends to secure, drawing the insulation

blanket together, surrounding the flag assembly.

Standard SureSite

Side-Mount

(3-Piece Blanket)

Insulation

Blanket

The optional heat trace cable should be installed according to the supplied instructions prior to wrapping the insulation blanket around the SureSite, as described below:

1. Wrap the long section of the insulation blanket around

the SureSite, between the side connectors and position

the edges so that the flag assembly alone remains visible.

2. Using non-ferrous lock-wire, secure the insulation

blanket to the SureSite, as shown in the Figure B, at the

“hog-ring” locations. Twist the wire ends to secure,

drawing the insulation blanket together, surrounding the

flag assembly.

3. The remaining two pieces (the top and bottom collars) are

to be wrapped around the SureSite, and likewise secured

as in step 2. See Figure B for clarity.

- Figure B -

2 of 3

Standard SureSite

(4-Piece Blanket)

The optional heat trace cable, should be installed according to the supplied instructions prior to wrapping the insulation blanket around the SureSite, as described below:

1. Wrap each of the two long sections of

the insulation blanket around half of

the SureSite, so that the areas

between the side connectors and the

flag assembly are covered. The flag

assembly alone remains visible.

Cable Tie

Insulation

Blanket

2. Using non-ferrous lock-wire, secure

the insulation blanket to the

SureSite,as shown in the Figure C,

at the “hog-ring” locations. Twist the

wire ends to secure, drawing the

insulation blanket together,

surrounding the flag assembly.

Heat Portion of Heater

Cable to be approx. XXX from Flag Assembly.

(Either side of flag assembly is fine.)

3. The remaining two pieces (the top

and bottom collars) are to be wrapped

around the SureSite, and likewise

secured, as in step 2. See Figure C

for clarity.

Cable Tie

Heat Cable

Extended Length

(Coil for Shipping)

- Figure C -

3 of 3

SureSite

Magnetic Liquid Level Indicator

Installation, Operation and Maintenance

Bulletin No. 177664-8 (Rev A)

Section 8: Heat Trace

Operating Principle

The Heat Trace is a self-regulating length of heating cable intended for use with the SureSite Magnetic Level

Indicator. The cable is provided with a nominal six-foot (183 cm) power lead length. The heater cable portion

(or length) is typically rated at 10 Watts per foot, operating at 120 Volts. Power consumption is directly proportional to the length ordered.

Power Lead

Heater Cable

Cable Tie

Heat portion of heater cable to be approx. 90° from flag assembly.

(Either side of flag assembly is fine.)

I n s t a l l a t i o n

The Heat Trace may be installed on either side of the flag assembly.

1. Position the Heat Trace heater cable end at the

top of the SureSite and approximately 90 degrees

from the flag assembly, as shown.

2. Using two cable ties (supplied), attach the Heat

Trace at the top and bottom of the SureSite unit,

as shown.

3. Attach power leads to voltage source.

Cable Tie

Heat Cable Extended Length

SureSite

Magnetic Liquid Level Indicator

Installation, Operation and Maintenance

Bulletin No. 177664-9 (Rev A)

Section 9: Cold Service

I n s t a l l a t i o n

Standard SureSite

Cold service insulation has been completely installed on the SureSite Magnetic Level Indicator at the factory; except for the insulated cap assembly, which must be installed in conjunction with the installation of the Gems

SureSite.

For Top and/or Bottom NPT Connections:

1. Remove the flange and install the float into the unit. Refer

to “Section 1: Weldments” of Instruction Bulletin #177664

for detailed instructions.

2. After the float has been installed, reinstall the flange, using

the gasket and bolts. Refer to the torque chart in the

“Weldments” section for the appropriate torque value for the

bolts.

Lens

Note

The insulated cap assembly must first be

installed on the connecting pipe from the

tank, prior to starting the pipe-joint

connections.

3. Before mating the SureSite Magnetic Level Indicator to your

connecting piping, slide the insulated cap assembly back

(toward the tank), far enough to permit completion of the

pipe joint assembly, using the appropriate pipe thread

sealant.

4. With the top and bottom pipe joint completed, slide the insulated cap assembly until it is flush

with the SureSite insulation, and wrap the circumferential joint with the special tape supplied.

5. Apply an appropriate cold service sealant around the pipe/insulation interface.

1 of 2

For NPT/Flange Side Branch Connections:

1. Remove the flange and install the float into the unit. Refer to Section 1 of this Instruction

Bulletin (“Weldments”) for detailed instructions.

2. After the float has been installed, reinstall the flange, using the gasket and bolts. Refer to the

torque chart in the “Weldments” section for the appropriate torque value for the bolts.

3. Place the insulation end cap assembly over the bottom flange, flush with the SureSite

insulation.

Note

If the top or bottom NPT connection is plugged (i.e., welded cap with plugged NPT), remove the tape from the cap, apply the appropriate pipe thread sealant and complete the pipe joint. Using an appropriate cold service sealant, seal around the pipe and insulation interface.

4. Wrap the circumferential joint with the special tape supplied.

5. Complete the installation of your SureSite Indicator according to the instructions provided,

using an appropriate thread sealant and/or gasket material.

2 of 2

Hello! I am an AI chatbot specifically trained to assist you with the Gems SureSite Magnetic Liquid Level Indicator Instruction Bulletin. I have thoroughly reviewed the document and can help you locate the exact information you need or explain the content in clear and simple terms. Whether you’re looking for guidance on specific features, troubleshooting steps, or general usage, feel free to ask your questions. The more details you provide about your concerns or needs, the more accurately and effectively I can assist you!

Show related prompts

Assistant typing

Assistant terminated

Key features

Shock and vibration-proof
Visible at great distances
Multiple configurations
Switch module compatible
Various liquids
Magnetic float and flags

Frequently asked questions

The SureSite uses a float with a built-in magnet that moves up and down with the liquid level. This magnet interacts with magnetic flags inside the indicator housing, causing them to rotate and reveal a color band that indicates the liquid level.

The SureSite is available in standard, mini, and plastic configurations. The standard SureSite is designed for general-purpose applications, while the mini SureSite is smaller and more compact. The plastic SureSite is made of durable plastic and is ideal for applications where corrosion is a concern.

The installation process will vary depending on the specific SureSite model and the type of tank you are using. The instruction bulletin provides detailed instructions for installation.

The SureSite can be used with a switch module to control a variety of devices based on the liquid level in the tank. The switch module is magnetically actuated and is installed opposite the flag assembly of the SureSite. When the float reaches a certain level, the switch will either open or close, depending on the configuration.