Garnet SeeLevel I 705 Series User manual

PRINTED IN CANADA


 GARNET
INSTRUMENTS LTD.
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Tank Monitor
Model 705 Manual
Three and Four Tank Models
IMPORTANT OPERATOR INFORMATION
DATE INSTALLED:
SERIAL NUMBER:
Signal Level
Black Water Tank
Gray Water Tank
Galley Water Tank
Fresh Water Tank



 GARNET INSTRUMENTS LTD.
S
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EE L
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L EVE
EVEEVE
EVE L I
L IL I
L I
TM
Tank Monitor
Model 705 Manual
Three and Four Tank Models
TABLE OF CONTENTS
1) OVERVIEW
2) SYSTEM DESCRIPTION
3) OPERATING INSTRUCTIONS
4) DISPLAY PROGRAMMING
5) SENDER PROGRAMMING
6) INSTALLATION GUIDE
7) TROUBLESHOOTING GUIDE
8) SERVICE AND WARRANTY INFORMATION
9) SPECIFICATIONS

CHAPTER 1
OVERVIEW
The SeeLeveL I Tank Monitor represents a massive leap forward in level
measurement technology for the Recreational Vehicle industry. The
SeeLeveL has a combination of features, accuracy, reliability, and diagnostic
capability that have never been available before.
The SeeLeveL I will monitor the battery voltage, the water and sewer holding
tanks, and the LP Gas tank. The information is displayed on a 5 segment
color coded LED bar graph. In addition, the system can display the operating
characteristics of each of the tank sending units, giving it unsurpassed
diagnostic capability.
705-P3
705-P4

CHAPTER 2
SYSTEM DESCRIPTION
The SeeLeveL consists of a display unit that mounts inside the RV, and
sender panels that stick to the side of the holding tank. A single two
conductor wire is used to connect all the sender panels to the display.
The Sender: Each sender panel is a flexible self adhesive printed circuit
board which is stuck to the side of the holding tank. The sender panel can be
cut to length to match the height of the tank, and it auto calibrates itself so that
it can read from Empty to Full regardless of the height of the tank. The sender
scans the water level through the tank wall using patented digital techniques
programmed into the sender microprocessor. When the sender transmits the
water level information to the display, it sends a digital code that has built in
error detection, making it impossible for the display to read an incorrect level,
even if the wiring is bad. In addition to the level, the sender also transmits
diagnostic information about its operation. This information can be used to
determine if there is buildup of sludge on the inside of the tank, or to
determine if the sender is delaminating from the side of the tank. If sludge
buildup in the tank becomes extreme the gauge will cease to operate (the tank
will always read empty), so by monitoring the signal level the tank can be
cleaned before the buildup gets excessive. Various sender options are
available to monitor tanks from 4 inches to 24 inches tall.
The Display: The display receives the information from the three sender
panels via a single two conductor wire, and displays the level information in
percent of full on a five segment LED bar graph. When the front panel button
for a particular tank is pressed, the display powers up and displays the level
for that tank. If the button is pressed and released, the display will show the
level for about 5 seconds and then shut down automatically. If another button
is pressed before the display shuts down, then the new level will immediately
be shown. If the same button is pressed twice, the display will hold on that
tank and continue to show updated levels for 5 minutes before shutting off.
This allows the user to monitor the filling or draining of a tank. By pressing
two buttons at once, the diagnostic functions can be accessed, these are
described in detail in the troubleshooting chapter.
If a sender is operating properly and connected to the display with good
wiring, then the display will show the level normally. If the wiring is
disconnected, shorted, or cut, or if the sender panel is defective, then the

display will indicate an error code. The various error codes are shown in the
troubleshooting chapter.
With these diagnostic features and the digital nature of the tank level sensing
technology, it is almost impossible for the system to indicate an incorrect
water level, and in the very unlikely event it does occur, the user can verify
what is happening with the diagnostic information.
The system also shows the RV battery voltage by measuring the voltage
which powers the display. The voltage is shown with a resolution of one volt.
The display can use an existing LPG electrical sender to show the LPG level.
It can automatically calibrate to any sender, and shows level on the LED bar
graph.

CHAPTER 3
OPERATING INSTRUCTIONS
The display is the only system component that is accessed by the user. All
user input to the display is done using the five buttons along the bottom of the
display. Operation of the display is as follows:
To read a water or sewer tank level:
1. Press the button corresponding to the tank to be checked and release it,
the display will show the level in percent on the LED bar graph. If no
other button is pressed, then the display will shut off after about 5
seconds. The following diagrams show examples of the color coded bar
graph.
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
Fresh water tank or battery condition
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V 100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
Empty / 11V
½ Full / 13V Full / 15V
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
Gray, galley, or black water tank
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
Empty
½ Full
Full

2. If another button (including BATT or LPG) is pressed before the 5 second
time is up for the first button, the display will immediately switch to
showing the new level or voltage. The 5 second timeout is restarted
every time a button is pressed.
3. To continuously display a reading, press and release the desired button,
and then press the same button a second time. When the button is
released, the display will be in hold mode, which is indicated by the bar
graph flashing on and off. While the display is in the hold mode it will
recheck the level once per second so the user can watch the level
change while the tank is being filled or drained. The display will
automatically shut off after 5 minutes in hold mode. To end the hold
mode before the 5 minutes is up, press any tank button, and the display
will shut off.
To read the battery voltage:
1. Press the BATT button and release it, the display will show the battery
voltage on the LED bar graph.
2. If no other button is pressed, then the display will shut down after about 5
seconds. If the BATT button is held down, the display will continuously
recheck the voltage and show the updated value.
3. If another button is pressed before the 5 second time is up for the BATT
button, the display will immediately switch to showing the value for the
new button. The 5 second timeout is restarted every time a button is
pressed.
4. There is no hold mode for the battery voltage.
To read the LPG tank level:
1. Press the LPG button and release it, the display will show the level on
the LED bar graph. If no other button is pressed, then the display shut
off after about 5 seconds.
2. If the LPG button is pressed again, a new reading will be obtained and
displayed, and the 5 second timer will be restarted. If the button is held
down, the existing reading is held for as long as the button is pressed,
and the display will shut off 5 seconds after the button is released.
3. If another button is pressed before the 5 second time is up for the LPG
button, the display will immediately switch to showing the new level or
voltage. The 5 second timeout is restarted every time a button is
pressed.

4. There is no hold mode for the LPG. The LPG tank level cannot change
fast enough to justify the use of the hold function, except during filling of
the tank. The gauge should not be used as a full tank shutoff indicator
since the LPG sender in the tank is not reliable or accurate enough to be
used as a safe indicator of a full tank.

CHAPTER 4
DISPLAY PROGRAMMING
To program the LED brightness:
1. If the display is to be used inside the coach, the LED brightness should
be low. If it is to be used in the service bay area where sunlight can
reach it, the LED brightness should be high.
2. To program the LED brightness, the display needs to enter the
brightness programming mode. To do this, press and hold down the
BATT button, the display will show the battery voltage.
3. While continuing to hold down the BATT button, press and hold down the
GRAY button, do this for about 5 seconds until the display shows the
brightness programming mode. When this occurs release both buttons.
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
Brightness programming
4. Press the GRAY tank button to increase brightness, or the FRESH tank
button to decrease brightness.
5. When the display shows the correct brightness, press the BATT button to
exit the programming mode.
To program the number of senders for each tank:
Note: for the 4 tank model, the grey and galley tanks can only have one
sender each, so for these tanks no programming is possible for the number of
senders.
1. To program the number of senders for each tank, the display needs to
enter the sender programming mode. This should only be done at the
time of installation, there is no reason to change the number of senders
afterward. Make sure that the number of senders programmed into the

display matches with the number of senders connected, otherwise the
display will show an error.
2. To enter the sender programming mode, press and hold down the button
for the tank to be programmed, the display will show a level or an error
message.
3. While continuing to hold down the button for the tank, press and hold
down the BATT button. The display will immediately show the
diagnostics code, continue to hold down both buttons until the display
enters the number of senders programming mode, this should take about
5 seconds. When the programming mode is entered, release both
buttons.
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
Diagnostics
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
Number
of senders
4. The display will now show the code for one sender or two senders, based
on what is currently programmed into the display. These are the only two
options, the display will not work with more than two senders per tank.
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
One sender
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
Two senders
5. To change the number of senders, press the tank button, each time the
button is pressed the display will switch to the other number.

6. When the display shows the correct number of senders, press the BATT
button to exit the programming mode. Each tank will need to be
calibrated individually using this procedure.
To calibrate the LPG sender:
1. The LPG tank must be full when the sender is calibrated, otherwise the
calibration will be invalid. Fill the LPG tank by using an alternate
measurement method, such as weight, a spit valve, or a mechanical
gauge on the tank.
2. To calibrate, press and hold down the LPG button, the display will show
some LPG level.
3. While continuing to hold down the LPG button, press and hold down the
BATT button. Continue to hold down both buttons for about 5 seconds
until the display shows the LPG calibration code.
100%
75%
50%
25%
0% 11V
12V
13V
14V
15V
LPG Calibration
4. When this occurs release both buttons, the display will shut off,
completing the calibration procedure.
5. The LPG can be recalibrated as many times as desired, although
recalibration should not be needed unless the LPG tank sender or the
display has been replaced.
The battery voltage is calibrated at the factory, this should never need to be
changed.

CHAPTER 5
SENDER PROGRAMMING
Long Stackable Senders
These senders are 12 inches long and can be either single or double stacked.
They are identified by the “TOP” on the middle tab.
To program the sender for the correct tank:
1. Since the senders are all connected in parallel to save wiring and to
simplify installation, the senders must be programmed so they know
which tank they are on. The senders can be programmed for either the
fresh, gray, or black tank for three tank models, or for fresh, gray, galley,
or black for four tank models. This is done with the tabs on the top of the
sender. See the following diagram.
2. The senders default to fresh tank operation if the programming is not
altered. Consequently, if the sender is for the fresh tank, nothing further
needs to be done to it.
3. If the sender is for the gray tank, remove the tab that says “GRY” next to
it.
4. If the sender is for the galley tank (4 tank models only), remove the tab
that says “GRY” next to it, and the tab that says “TOP”. Even though this
would normally be a gray top sender, the 4 tank display interprets this as
the galley sender.
5. If the sender is for the black tank, remove the tab that says “BLK” next to
it.
6. This is all that is required to program the senders for the correct tank.
However, if you make an error, you have one chance to correct it, as
described below.
7. If the “GRY” tab has been removed and it should be a black tank sender,
or if the “BLK” tab has been removed and it should be a gray tank
sender, then cut out the recessed gray-black correction tab that says
“GBC” next to it. This reverses the effect of the gray and black tabs.
8. If either the “GRY” or “BLK” tabs have been removed and it should be for
a fresh tank, then remove the other “GRY” or “BLK” tab. When both the
“GRY” and “BLK” tabs are removed, it is equivalent to neither of them
being removed.
9. If the sender is single, no further programming is required.
10. If dual stacked senders are used, the top sender must have additional
programming, as described below.

To program the sender as top or bottom:
1. Note that for 4 tank models, the gray and galley tanks can only have
single senders, so this section does not apply to them.
2. Since the senders are all connected in parallel to save wiring and to
simplify installation, the senders must be programmed so they know
whether they are a single, top, or bottom sender. This is done with the
tab at the top center of the sender. See the following diagram.
3. The senders default to single or bottom operation if the programming is
not altered. Consequently, if the sender is for single or bottom operation,
nothing further needs to be done to it (beyond programming it for the
correct tank).
4. For a top sender, remove the tab that says “TOP” next to it.
5. This is all that is required to program the senders for single, top, or
bottom use. However, if you make an error, you have one chance to
correct it, as described below.
6. If the “TOP” tab has been removed and it should be a single or bottom
sender, then cut out the recessed top correction tab that says “TC” next
to it. This reverses the effect of the top tab.
7. Verify that both the top and bottom senders have been programmed for
the correct tank.

GND
<<--UP
SIG
T
C
GB
C
GND
<<--UP
SIG
T
C
G
B
C
GND
<<--UP
SIG
T
C
G
B
C
GND
<<--UP
SIG
GRY BLK TOP
TC
GBC
G
N
D
<
<
-
-
U
P
S
I
G
GRY BLK TOP
TC
GBC
G
N
D
<
<
-
-
U
P
S
I
G
GRY
B
L
K
T
O
P
T
C
GBC
Example of corrected FRESH TOP
sender programming
(GRY or BLK cut by mistake)
Example of corrected SINGLE
or BOTTOM sender programming
(BLK cut by mistake)
GRAY Example of corrected SINGLE
or BOTTOM sender programming
(TOP cut by mistake)
FRESH
Cut for GRAY tank
GRY
B
L
K
T
O
P
Cut for BLACK tank
Cut for TOP sender
G
R
Y
B
L
K
T
O
P
Example of GRAY TOP
sender programming
G
R
Y
B
L
K
T
O
P
Example of BLACK
BOTTOM sender programming
SINGLE
or
Long stackable sender programming examples

Short Single Senders
These senders are 6 inches long and cannot be stacked, they must be single.
They are identified by the “ALT” on the middle tab.
To program the sender for the correct tank:
1. Since the senders are all connected in parallel to save wiring and to
simplify installation, the senders must be programmed so they know
which tank they are on. The senders can be programmed for either the
fresh, gray, or black tank for three tank models, or for fresh, gray, galley,
or black for four tank models. This is done with the tabs on the top of the
sender. See the following diagram.
2. The senders default to fresh tank operation if the programming is not
altered. Consequently, if the sender is for the fresh tank, nothing further
needs to be done to it.
3. If the sender is for the gray tank, remove the tab that says “GRY” next to
it.
4. If the sender is for the galley tank (4 tank models only), remove the tab
that says “GRY” next to it, and the tab that says “ALT”.
5. If the sender is for the black tank, remove the tab that says “BLK” next to
it.
6. This is all that is required to program the senders for the correct tank.
There are no correction tabs on this sender. However, if either the
“GRY” or “BLK” tabs have been removed and it should be for a fresh
tank, then remove the other “GRY” or “BLK” tab. When both the “GRY”
and “BLK” tabs are removed, it is equivalent to neither of them being
removed.

UP-->>
Cut for
GRAY
tank
B
L
K
A
L
T
Cut for
BLACK
tank
GND
SIG
U
P
-
-
>
>
Cut both for
GALLEY tank
B
L
K
A
L
T
G
N
D
S
I
G

CHAPTER 6
INSTALLATION GUIDE (NEW OEM INSTALLATIONS ONLY)
1. The installation consists of mounting the display inside the RV, cutting and
fastening the senders to the sides of the holding tanks, connecting wiring,
and programming the display.
2. Mount the display by cutting a hole in the wall 3” wide by 1 7/8” high and
bringing the wiring out through the hole to connect to the display panel
connector.
3. Connect the wiring according to the following table. It is easier to connect
the wiring to the display connector first, and then plug the connector into
the display panel. The sender needs to be grounded to a single ground
wire from the display.
Wire Color Function
Red 18 gauge +12V power input to monitor
Black 18 gauge Ground
Blue 18 gauge Tank senders
Yellow 18 gauge Pump power output
Green 18 gauge LPG tank (optional)
4. Determine where to mount the senders on the tanks. They will need to
have a flat area on the side of the tank large enough so the whole width of
the sender is in contact with the side of the tank, all the way from the top to
the bottom of the tank. Make sure that any metal is at least an inch away
from the sender. Clean the area well so that there is no dust, grease, oil,
water, etc., that would prevent the adhesive on the sender from sticking.
5. Measure the height of the tank to determine how long the senders should
be. For tanks less than 7” tall, follow step 6. For tanks from 7” to 13” tall,
follow step 7. For tanks greater than 13” tall, follow step 8.
6. For tanks less than 7” tall, a single short sender is used. The sender ends
should be 1/4” to 3/4” away from the top and bottom of the tank, to allow for
the thickness of the tank top and bottom and any bows in them (see the
diagrams). The senders are calibrated to account for this distance from
the bottom of the tank. The sender is cut to the nearest even 1 inch in
length, for example, a system with a tank height of 5.75 inches, cut the
sender to be 5 inches long, this allows 3/8” at each end when the sender is
centered vertically on the tank. IMPORTANT: Do not cut the sender
shorter than 4 inches! The sender will not work if it is cut less than 4
inches. Proceed to step 9.

7. For tanks less than 13” tall, a single long sender is used. The sender ends
should be 1/4” to 3/4” away from the top and bottom of the tank, to allow for
the thickness of the tank top and bottom and any bows in them (see the
diagrams). The senders are calibrated to account for this distance from
the bottom of the tank. The sender is cut to the nearest even 1.5 inch in
length, for example, a system with a tank height of 11.75 inches, cut the
sender to be 10.5 inches long, this allows 5/8” at each end when the
sender is centered vertically on the tank. IMPORTANT: Do not cut the
sender shorter than 4-1/2 inches! The sender will not work if it is cut
less than 4-1/2 inches. Proceed to step 9.
8. For tanks greater than 13” tall, two stacked long senders are used. The
sender ends should be 1/4” to 3/4” away from the top and bottom of the
tank, to allow for the thickness of the tank top and bottom and any bows in
them (see the diagrams). The senders are calibrated to account for this
distance from the bottom of the tank. In addition, there needs to be a gap
of 1/16” to 1/8” to between the two senders. Therefore total length of both
senders will be: tank height -1/4”-1/4”-1/8”, then rounded down to the
nearest 1.5 inches. The top and bottom senders should be approximately
the same length for best results. For example, if the tank height is 22”,
then 22”-1/4”-1/4”-1/8”=21 3/8”, so the total length of both senders will be
21 inches. Make both senders 10.5” long. Proceed to step 9.
9. To make the senders the right length (assuming they are too long) they will
need to cut off with a pair of scissors. The end to be cut is the bottom end,
which is the opposite end from the top where the wires come out (see the
diagrams). DO NOT cut the sides, and DO NOT cut the sender shorter
than 4-1/2 inches (long sender) or 4” (short sender). The cut must be in
between the sensor pads, and the cut must be made parallel to the existing
bottom end. Double check your measurements, if the sender is cut too
short, it cannot be lengthened.
10.The senders need to be programmed so they know which tank they are on.
This is done by selectively cutting off the tabs on the top of the sender.
See the chapter entitled “SENDER PROGRAMMING” and the section “To
program the sender for the correct tank” for details.
11.For two stacked sender systems, the senders need to be programmed so
they know that they are being used as top or bottom senders. See the
chapter entitled “SENDER PROGRAMMING” and the section “To program
the sender as top or bottom” for details.
12.Once the sender is cut to length and programmed, carefully peel the
backing paper off the adhesive. Do this slowly to prevent the adhesive
from being ripped off the sender, and to prevent the backing paper from
ripping. Be careful not to bend the sender sharply in the process. Position

the sender over the side of the tank and carefully stick it down. MAKE
SURE THAT THE END WITH WIRES IS POINTING UP!! Position the
bottom of the sender at least 1/4” above the bottom of the tank, and more if
required to equalize the space at the top and bottom of the tank. Make
sure that the sender is square with the tank. You only have one shot at
this, if you try to peel it off the tank once it is stuck the sender may be
damaged by the sharp bending. Carefully press the sender down to the
tank so that all of the adhesive is contacting the tank wall.
GND
UP-->
>
SIG
SIGNAL
WIRE
Route wires to the right,
away from the sender
T
C
G
B
C
TOP OF SENDER
GROUND
WIRE
4-1/2 Inch
minimum
measurement
length
G
R
Y
B
L
K
T
O
P
1-1/2 Inches
BOTTOM OF SENDER
ONLY CUT BETWEEN PADS WHEN CUTTING THE SENDERTO LENGTH

13.Connect the all the blue wires from the senders together, and to the blue
wire from the display. Connect the black wire from each sender to ground.
Use Marrette or crimp connectors to fasten the wires together. Make sure
that the wires from the sender are routed away from the sender, if they
drape over the sender they could affect the reading. Secure the wires with
tie wraps or something similar so that the wires do not rattle or press
against the sender, this may result in sender damage or wires breaking
over time.
14.Do steps 4 to 12 for the other holding tanks.
15.All that remains now is calibration and testing. The tank senders will self
calibrate to whatever length they are cut, so they will always read from 0 to
100%. The display needs to be set to a one or two sender system for each
tank. See the chapter entitled “DISPLAY CALIBRATION” and the section
“To calibrate the number of senders for each tank” for details. Make
sure you do it for each tank.
16.For the initial test, have the tank at least 1/4 full of water or sewage, and
verify that the percent level reading looks correct (see the chapter entitled
“OPERATING INSTRUCTIONS” and the section “To read a water or
sewer tank level” for details). Check to see that the signal power is
adequate (see the chapter entitled “TROUBLESHOOTING GUIDE” and
the section “To review the sender diagnostics” for details). If the signal
power is too low, make sure that the sender(s) is well stuck to the side of
the tank and that the tank is reasonably clean inside, as a large buildup will
reduce signal strength. Note that the system “learns” about the
characteristics of the tank with use, so the readings may be inaccurate
when the tank is empty or almost empty when the system is first tested.
Once the tank has been filled at least 1/4 full the system will be properly
“taught” and should read correctly after that.
17.Calibrate the LPG by filling the tank and following the instructions in the
chapter entitled “DISPLAY CALIBRATION” and the section “To calibrate
the LPG sender”.
18.Connect the pump switch as required.
WARNING: The pump switch is rated for a maximum of 6 amps. The use
of a relay is required if more than 6 amps is needed.
19.Verify that the battery voltage reads correctly. If it appears low, make sure
you have good wiring for the 12 volt power and the ground.