SeeLeveL Sender Manual

Introduction

These SeeLeveL Senders are used with SeeLeveL Tank Monitoring systems that can monitor up to seven tanks, including 2 Fresh, 3 Grey, and 2 Black. The senders are mounted on the outside of the holding tanks and can be stacked to fit taller tanks. Depending on tank height and desired resolution, Garnet offers three different sender options. They work on most plastic or polyethylene holding tanks that contain water-soluble fluids and are not compatible with metal holding tanks.

The 710-AR2 is 9" high with a resolution of 0.25", optimal for low-profile tanks. It is ideal for tanks 3.5"-11" tall but can be stacked with an additional 710-AR2 to measure tanks as tall as 11".

The 710-ES3 sender is 12" high with a resolution of 0.33", the most popular option, designed for most standard holding tanks. It is ideal for tanks 4.5"-14" tall but can be stacked with an additional 710-ES3 to measure tanks as tall as 26".

The 710-SS2 sender is 16" high with a resolution of 0.44", designed for taller tanks. It is ideal for tanks 7.5"-18" tall but can be stacked with an additional 710-SS2 to measure tanks as tall as 34".

See more information about sender lengths on page 3.

The communication protocol used between senders and displays is proprietary, allowing control over accuracy and functionality for reliable operation.

Safety Symbols Information

• ? NOTE: Expands on information for any procedures.
• ⚠️ CAUTION: Explains safety information that could cause damage to the product, including data loss.
• ❗ WARNING: Explains dangers that might result in personal injury or death.

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

Document Version: 710-AR2-ES3-SS2 Manual_v1.3 - 04-Feb-2025

Installation Information

The installation for the complete system involves mounting the display inside the RV, cutting and mounting the senders to the sides of the tanks, connecting the wiring, and programming the display. This manual provides information on how to install the SeeLeveL 710-AR2, 710-ES3, and 710-SS2 senders.

? NOTE: Previous model senders (710-JS, 710-ES, 710-ES2, 710-SS) can be combined with new sender models.

Before senders are installed, the display should be installed first. Refer to the Display Installation Guide and User Manual for your purchased model for all installation and connection details. All documentation is available from the Resource Library on the support page: https://www.garnetinstruments.com/support/

Before installing, watch this video! [Play Video]

Tools and Equipment Required:

• Wire cutters/stripper
• Wire crimper
• Scissors or hole punch
• Acetone/rubbing alcohol
• Duct tape or tie-wraps for securing wires
• Non-aggressive tape (painters, masking)
• Electrical tape
• Butt connectors

Determine Best Placement & Configuration

Sender Placement

Senders require a flat area on the tank side, large enough for the sender's full width to contact the tank. Ensure metal is at least 1" away from the sender's sides, top, and bottom, and at least 2" away from the sender's face. Do not wrap corners over the top or bottom of the tank.

⚠️ CAUTION: Bending the sender sharply will damage the circuit on the sender.

Sender Configuration

To determine the correct sender configuration, measure your tank height and find the measurable space (see following page). The measurable space is the ideal sender position on the tank, which dictates the required sender length. Senders can be cut if too long.

The following table lists recommended senders and configurations for various tank heights:

⚠️ CAUTION: DO NOT mix sender types when stacking senders.

Determine Measurable Space on Tanks

Find Measurable Space

Measure the tank height from top to bottom to determine the measurable space.

• The minimum gap is 1/4", but a 1/2" gap from the top and bottom of the tank is recommended. This gap ensures the sender can read properly through the tank wall, as corners or rounded edges can be too thick.
• Subtract the gap space from the overall tank height to find your measurable space. Use the calculation formula: Tank Height - Top Gap - Bottom Gap = Measurable Space.

Diagram: Illustrates tank height, a 1/2" gap at the top and bottom, and the resulting measurable space in the middle.

? NOTE: The recommended gap is 1/2", but the minimum can be 1/4". The maximum gap is 3/4" for the 710-AR2 and 1" for the 710-ES3. See recommended sender options table on page 2.

⚠️ CAUTION: Installing a sender outside the recommended measurable space may affect your readings.

? NOTE: This formula is not static. For some fresh tanks, the pump feed outlet may be over 1" from the bottom. Install the fresh tank sender above the outlet to ensure the monitor reads "0" before the pump sucks air.

Single Configuration

1. Measure the height of the tank.
2. Tank height = __________
3. Calculate the recommended measurable space: Tank height - top gap - bottom gap = measurable space.

? NOTE: If senders do not fit the full tank height, optimize location. For FRESH tanks, position closer to the bottom. For GREY/BLACK tanks, position closer to the top.

Stacked Configuration

Two senders may be required for taller tanks. A gap of 1/16" to 1/8" is needed between stacked senders. Calculate the total measurable space for both senders:

1. Measure the height of the tank.
2. Tank height = __________
3. Calculate the recommended measurable space.
4. Tank height - top gap - bottom gap - middle gap = measurable space.

? NOTE: Both senders in a double-stacked configuration should be approximately the same length.

Sender Specifications

710-AR2 Sender: 9" height, 0.25" resolution. Features black ground wire and blue signal wire. Includes markings for tank levels (e.g., 3.5" to 4.5" TANK).

710-ES3 Sender: 12" height, 0.33" resolution. Features black ground wire and blue signal wire. Includes markings for tank levels (e.g., 4.5" to 5.75" TANK).

710-SS2 Sender: 16" height, 0.44" resolution. Features black ground wire and blue signal wire. Includes markings for tank levels (e.g., 7.75" to 9.5" TANK).

Cutting Senders

Senders must be cut to the required length to match the measurable space of the tank. Cuts must be made between sender segmented pads. The minimum cut length is after the first three segmented pads. Use scissors for cutting.

Diagram: Shows a sender with segmented pads, indicating the "3 pad minimum length" and "Only cut between pads" areas.

Programming the Senders

Senders are programmed by cutting tabs at the top to identify the tank type or position (top/bottom) in a configuration. Scissors or a hole punch can be used.

For tanks 5 through 7, sum two tab numbers for the tank number. This works on display models supporting up to 7 tanks.

Refer to the table and illustrations for programming examples:

⚠️ CAUTION: MAKE SURE YOU CUT THE CORRECT TABS! Cutting the wrong tabs results in incorrect programming, cannot be reversed, and is not covered under warranty.

Programming for Single or Bottom Senders:

Diagrams: Show tab cutting for FRESH, GREY, BLACK, GALLEY, FRESH 2 (TANK 4), GREY 2 (TANK 5), BLACK 2 (TANK 6), GREY 3 (TANK 7).

? NOTE: Previous model senders are compatible. For Galley button systems, cut 2/GRY and TOP tabs. Galley/Grey tanks can only have one sender and cannot be stacked.

Programming for Top Senders (Double-Stacked Configuration):

The top sender requires an additional tab to be cut. Diagrams: Show tab cutting for FRESH TOP, GREY TOP, BLACK TOP, FRESH 2 TOP (TANK 4), GREY 2 TOP (TANK 5).

? NOTE: For Tanks 4-7, also cut the TOP tab as indicated.

Prepare Sender for Installation

1. Clean the Tank

Clean the mounting area thoroughly, ensuring no dust, grease, or oil. Acetone or rubbing alcohol removes sticky residue.

Image: Depicts cleaning a tank surface with a cloth and a bottle of cleaning fluid.

2. Temporarily Tape Sender on Tank

⚠️ CAUTION: DO NOT SKIP THESE STEPS. Removing the sender after permanent installation will cause damage not covered by warranty.

Once cut and programmed, temporarily tape the sender to the tank wall using non-aggressive tape (painter's or masking tape). Place tape along both sides of the sender and perform a test to verify operation.

⚠️ CAUTION: Route wires to the right, away from the senders. The wires indicate the top of the sender.

Image: Shows a sender temporarily taped to a tank wall with non-aggressive tape.

Wiring the Sender

3. Connect the Wiring to the Pigtail

The diagram shows wiring from the sender to the pigtail harness. Other wiring connections may apply per model; all diagrams are available on the website. Up to 7 tanks can be connected, including stacked configurations.

Diagram: Illustrates wiring connections from multiple senders to a pigtail harness, showing +12V POWER and GROUND connections.

⚠️ CAUTION: Wires must be routed to the RIGHT side, away from the sender. Never route wires to the left, as draping over the sender could affect readings.

⚠️ CAUTION: It is crucial that the display and senders share the same ground. Ensure the sender ground connection is linked back to the display ground or breaker panel ground.

Sender Test

4. Verify Operation Before Permanently Adhering

• Tank Levels Operation Test: For the initial test, ensure the tank is at least 1/4 full of water or sewage. Verify that the percent level reading on the display panel is correct. Example: FRESH 25 LEVEL IN PERCENT.
• Signal Strength Test: Signal power indicates transmission through the tank wall. Typical signal power should be 50%-60%. The gauge works with a minimum signal strength as low as 20%, but 50%-60% at installation provides a good margin for buildup. P00 = 100%.

Diagram: Shows a sender on a tank for testing, with an example display reading.

Mounting the Sender

5. Permanently Adhere Sender to the Tank

Once operation is confirmed, permanently install the sender to the tank wall. Remove one side of the temporary tape. Fold the sender over so it remains attached by the remaining tape. Slowly peel the backing paper off the adhesive. Carefully fold the sender back and press it firmly against the tank wall, ensuring all adhesive contacts the wall and there are no air gaps. Remove the other side of the temporary tape.

⚠️ CAUTION: Be careful not to bend senders excessively, as this can damage circuits. Once adhered, removal voids the warranty.

6. Secure the Wires

Use duct tape, tie wraps, or similar to secure wires, preventing them from rattling or pressing against the sender, which could cause damage or breakage over time.

Image: Shows wires secured with tie wraps and tape.

7. Apply Undercoating to the Senders

For tanks exposed to under-chassis road spray and flying rocks, Garnet recommends using:

• 3M 03584 Professional Grade Rubberized Undercoating
• Gravel Guard Rocker Guard Coating By Dominion Sure Seal
• Gorilla Glue Waterproof Patch & Seal Tape