Download B A T T E R Y “ F U E L ” G A U G E

BATTERY
MODEL
“FUEL”
GAUGE
906
FEATuRES
• All principal circuits are integrated in a single chip for
long-life reliability.
• A 10-bar LED displays the state of charge successively,
bar by bar, from full to empty.
• At 70% depth of discharge, a flashing LED signals an
“energy reserve” alert.
• At 80%, alternately flashing LEDs provides an “empty”
status warning.
• Model 906 is compact and easily installed in panel
cutouts of only 36.8 X 24.1 mm, with less than 35 mm
behind panel clearance needed.
• Recognizes improperly charged battery.
• Keyswitch activated LED display (state-of-charge is monitored as long as 906 is connected to battery).
• Two reset methods: Open Circuit Reset-OCR (for units
with memory option). Upon reconnection of a battery the
gauge will reset if it measures 2.09 volts/cell or higher.
High Voltage Reset-HVR Gauge must measure 2.35 volts
per cell for 6 continuous minutes during charging.
OPTIONS
• The Output Signal option causes the voltage on pin 3 to
DESCRIPTION
drop from 5 to 0 volts at 80% discharge. It can be used
Model 906 is an inexpensive, one piece, easy to install
battery fuel gauge. It is completely solid state and provides a reliable, accurate, and easy to read display of
battery state-of-charge. Model 906 is available in five
panel mount packages and a printed circuit board mount-
to signal another component or to allow for the disabling
of a specified vehicle function, insuring against abusive
deep discharge conditions. The Output Signal can also
be used to drive the Curtis 1178 Relay Module.
• The memory option allows the gauge to recall the stateof-charge whenever the battery is disconnected.
• Special models and custom panels are available --please
ed module for custom dash panel applications.
contact your Curtis sales representative.
SPECIFICATIONS
APPLICATION
System Voltages: 12V, 24V, 36V, 48V
This battery fuel gauge features Curtis-patented technology
Operating voltage: +/–25% of nominal voltage
and is ideal for golf cars, commercial cleaning equipment,
Operating temperature: –40°C to +85°C
mobility aids, electric bicycles, electric marine motors,
Storage temperature: –50°C to +90°C
medical devices, and similar equipment.
Shock & Vibration: Meets SAE J 1378
CURTIS INSTRUMENTS, INC.
200 KISCO AVENUE
MT. KISCO, NY 10549 USA
TEL (914) 666-2971
FAX (914) 666-2188
CURTIS INSTRUMENTS, (UK) LTD.
5 UppER pRIORY STREET
NORThAMpTON NN1 2pT, ENGLAND
TEL 44 (0) 1604-629755
FAX 44 (0) 1604-629876
www.curtisinstruments.com
CURTIS INSTRUMENTS INDIA
pRIVATE LTD.
1199, GhOLE ROAD
pUNE 411004, INDIA
TEL 91 (0) 20-5531288
FAX 91 (0) 20-5539192
MODEL
906
28.8
18.0
F/T Case:
CASE
STYLES/DIMENSIONS:
1
mm
35.5
1.5
2
-
31.2
F/T Case
44.5
3.2
28.8
+
0
23.8
1
22.7
MAX.
4
F/T Case:
53.2 MAX.
3
18.0
Ø3.8 (2X)
F case: 1/4” (6.4mm) wide (4X)
T case: 3/16” (4.8mm) wide (4X)
2
31.2
MAX.
23.8
4
J Case:
53.2
44.5
35.5
1.5
36.7
1
3.2
-
+
0
1
22.7
36.5
3
MAX.
18.0
Ø3.8 (2X)
36.7
44.5
F case: 1/4” (6.4mm) wide (4X)
35.5
T case: 3/16” (4.8mm) wide (4X)
J Case:
0
36.5
J Case
31.2
MAX.
53.2 MAX.
18.0
23.8
3.2
35.5
1
31.2
MAX.
D Case:
22.7
44.5
1.5
Ø 3.8 (2X)
PIN
1
36.7
0
PIN
2
PIN
3
PIN
4
1
23.8
Ø 3.8 (2X)
22.7
32 Max
36.7
1
2
4
3
0
1- +
22 0.15
24 0.3
PIN 1
PIN 2
PIN 3
PIN 4
Thumbnut 4mm32 Max
D Case
D Case:
Washer 4mm
"U" Clamp For 0.76-6.35
44.6 0.3
1
2
0
1- +
22 0.15
4
24 0.3
3
Thumbnut 4mm
Terminals:
Washer 4mm
"U" Clamp For 0.76-6.35
1 - Battery +44.6 0.3
Panel Thickness
2 - Battery 3 - Output Signal or Memory Battery (positive)
4 - Key Switch
Lens Material: Glass or Plastic
Case Material: ABS KJW, Black48 0.3
4 0.2
36.5
Y Case
Y Case:
48 0.3
4 0.2
Panel Thickness
Terminals:
36.7
1 - Battery +
2 - Battery 3 - Output Signal or Memory Battery (positive)
4 - Key Switch
18.0
Lens Material: Glass or Plastic
Case Material: ABS KJW, Black
4.7
0
1
23.8
1234
27.5
36.5
Y Case:
36.7
18.0
40.6
4.7
Z Case:
1234
28.8
18.
0
23.8
4.7
0
1
40.6
27.5
2
Terminals:- 1
Battery +Key Switch
31.2
53.2 MAX. 2
MAX.31.2
MAX.
F/T Case:
4
2
J Case:D Case:F/T Case:
18.0
28.8F case: 1/4” (6.4mm) wide (4X)
32 Max
36.5
Thumbnut 4mm
31
Terminals:- 36.7
Battery +Battery 53.2
44.6 0.3
1
53.2
T case: 3/16” (4.8mm) wide (4X)Lens
Material: Glass or Plastic
Thumbnut 4mm
24 0.3
Glass or PlasticABS KJW, 24 0.3
Black
0
1
10
18.0
"U" Clamp For 0.76-6.35Panel Thickness
2
2
44.5
35.5
148 0.3
0
-
18.0
+ 36.744.5
35.5
36.5
31.2
MAX.
Y Case:
4
MODEL
36.5
18.0
36.7
Y Case:
3
36.7
906
Ø3.8 (2X)
1
4.7
40.6
4.7
1
0
F case: 1/4” (6.4mm) wide (4X)
23.8
23.8
36.7
1234
STYLES/DIMENSIONS:
22.7
40.6
18.0
1234
CASE
0
23.8
0
1 27.5
27.5
mm
36.5
J Case:
53.2 MAX.
18.0
Z Case
Z Case:
Z Case:
28.8
18.0 28.8
18.0
36.7
36.7
1
44.5
3.2
35.5
40.6
4.71.5
40.6
4.7
2
31.2
1
0
1
2
23.8
1
0
27.5 22.7
23.8
MAX.
4
23.8
3
4
3
27.5
Ø 3.8 (2X)
PIN 1
PIN 2
P Module
Module:
Module:
36.7
PIN 3
PIN 4
13.0 Min
2.0
+P
+
1
2
COMPONENT
1 SIDE
D Case:
4
2
14.0
+
4
9.5
+
COMPON 3
ENT
SIDE
+
1
26.70
13.0 Min
2.0
3
+
19.0 Max
32 Max
19.0 Max
19.0 Max
14.0
26.70
9.5
10.50 Max
19.0 Max
22 0.8 .02 Dia.
0.15
10.50 Max
10.50 Max
0
1- +
24 0.3
33.0 Max
2
2.0 +
28
4
3
33.0 Max 28
33.0 Max
Note:
4
0.8 .02 Dia.
Plac
es
Thumbnut
4 Places
4mm
Washer 4mm
10.50 Max
33.0 Max
The 906 modules are supplied with critical components exposed. The user must encase the module to provide adequate
protection, depending upon the user's applications and conditions. For proper mechanical support, all four pins should be
Note:
The 906 modules are supplied with critical components exposed. The user must encase the module to provide adequate
soldered to the PC Board.Module face should be a 10mm minimum from the PC Board when flow soldered.
protection, depending upon the user's applications and conditions. For proper mechanical support, all four pins should be
soldered to the PC Board.Module face should be a 10mm minimum from the PC Board when flow soldered.
Lens Material: Glass or Plastic
Case Material: ABS KJW, Black
Terminals:
1 - Battery +
2 - Battery 3 - Output Signal or Memory Battery (positive)
4 - Key Switch
36.5
MODEL
Y Case:
ENCODEMENT
18.0
40.6
36.7
906
4.7
F
24
H
N
A
906
F
A
24
O
1
O
H
N
A
Case Styles
0
A
Reset Level
27.5
Option
1234
Voltage
Discharge Profile
ArtworkF
T
12V
(no memory)
N=2.04 V/cell @ full to 1.73 V/cell @ empty
B=Memory & output option O=Standard
Voltage
Discharge Profile
Artwork
J
T
24V
D
J
36V
Y
D
48V
Z
P
Y
H=2.35 V/cell HVR
D=Output signal
O=Standard
Curtis
12VB=2.09 V/cell OCR
(no memory)
G=1.97 V/cell @ full to
1.75 V/cell @ empty
N=2.04 V/cell @ full to 1.73 V/cell @ empty
B=Memory & output option
W=2.02 V/cell @ full to 1.85 V/cell @ empty
5 0.5V above empty
24V
(with memory)
B=2.09 V/cell OCR
G=1.97 V/cell @ full to 1.75 V/cell @ empty
Curtis
0 to 0.1 V at empty
36V
W=2.02 V/cell @ full to 1.85 V/cell @
empty
Z Case:
(with memory)
48V
Z
36.7
P
1
28.8
18.0
4.7
2
5 0.5V above empty
impedance
0 to 0.1 V at empty
M=Memory option
10K impedance
M=Memory option
10K
NOTE: This gauge is not intended to measure the state of charge of batteries subject to extended
0
1
periods of inactivity since it does not account for self-discharge effects. Consult factory for details.
23.8
4
3
27.5
WA R R A N T Y
Two year
limited warranty from time of
delivery.
Module:
Specifications subject to
change without notice
+P
MODEL 906
Battery “Fuel” Gage
®
Read Instructions Carefully !
Safety Instructions
This instrument was manufactured and tested
according to the applicable technical standards. It complies with
all the safety regulations as shipped from the factory.
Installation and startup must be performed by skilled personnel.
Failure to install and operate the unit in accordance with these
instructions may result in damage or injury.
If safe operation of the instrument can no longer be ensured,
stop and secure it against accidental operation.
If instrument failure or malfunction may cause personal injury or
material damage, use additional safety measures such as limit
switches, guards, etc.
Read the Operating Instructions carefully before startup.
Note the safety instructions marked with this
warning symbol in this manual!
TABLE OF CONTENTS
1. Model Encodement
2. Technical Specifications
2.1 Electrical
2.2 Mechanical
2.3 Environmental
3. Installation
4. Operation
5. Troubleshooting
6. Maintenance
Page
2
4
4
5
6
7
9
10
1. MODEL ENCODEMENT
906 t uu
906 t
vwxyz
uu
v
Case Style*
Voltage (volts)
Reset Level/Type
Y, Z = Rectangular
12
B = 2.09 VPC (OCR) ,
D = Din 24
2.35 VPC (HVR) w/memory**
P = Module (no case)
36
H = 2.35 VPC (HVR) w/o
memory
F, J, T, TX = Hexagonal 48
(1)
(2)
(3)
* The Model 906 modules (906P) are supplied with critical
components exposed. User must encase module to provide adequate
protection, depending on application and conditions. For proper
mechanical support, all four pins are soldered to the PC board.
Module face is a 10-mm minimum from the PC board when flow
soldered.
** The “memory” will save the previous “state-of-charge” if the instrument is reconnected to a battery that is not fully charged.
(1) VPC = Volts per Cell
(2) OCR = Open Circuit Reset (battery swapped)
(3) HVR = High Voltage Reset (instrument remains attached to
battery while charging)
2
w
Discharge Profile
Artwork
N = 2.04 VPC at Full
1.73 VPC at Empty
y G = 1.97 VPC at Full
1.75 VPC at Empty
W = 2.02 VPC at Full
1.85 VPC at Empty
x
Output/Options
z
A = No Option
O = Curtis
D = Output Option
5 ±0.5 V above Empty
0-0.1 V at Empty,
10 Kimpedance
M = Memory Option only
B = Both Memory and
Output Option
y
Output/Options
A = No Option
3
2. TECHNICAL SPECIFICATIONS
2.1 Electrical
Operating Voltage
Operating Range: ±25% of nominal voltage
Operating Current
Voltage (VDC) Nominal Current (mA)
Current (mA)
12
24
36
48
20.3
15.2
15.4
14.9
Maximum
31.0
21.1
21.2
20.0
2.2 Mechanical
Display
10-digit, red LED
Recommended Panel Cutouts
F, J,T, TX, Y, Z Case: 36.8 mm x 24.1 mm +0.3/-.0mm
D Case: 45.3 mm x 22.3 mm ±0.1
4
Terminals
D, T, TX = 3/16” blade
F, Z = /4” blade
1
J, Y = 4-pin Packard Connector
equiv. to Delphi PN 15336035
P = solder pins
2.3 Environmental
Temperature
Operating: –40 to +85°C
Storage: –50 to +90°C
Humidity
95% RH non-condensing at 38°C
Shock and Vibration
Meets SAE J 1378
5
3. INSTALLATION
Connecting Model 906
Pin 1 = Battery +
Connects to the vehicle’s main positive (+) terminal.
Use as short a wire as practical.
Pin 2 = Battery –
Connects to the vehicle’s main negative (–) terminal
Use as short a wire as practical.
Note: Pins 1 & 2 are connected across the total
battery pack.
Pin 3 = Output Signal + or No Option
Output Signal option: 5 VDC ±0.5 VDC (90 µA current
source) above Empty, 0-0.1 VDC at Empty
1 VDC maximum (90 µA sink);
No Option: Pin 3 is left open.
Pin 4 = Keyswitch
Connects to Battery + through the switched terminal of
the
keyswitch.
6
4. OPERATION
2
1
4 3
Display
Only when the battery is properly charged is the
right-most LED lit.
As the battery’s state-of-charge decreases, successive
2 LEDs light up, only one on at a time.
The 2nd-from-left LED flashes, indicating “energy
3 reserve” (70% depth of discharge).
The 2 left-most LEDs alternately flash, indicating “empty”
4 (80% depth of discharge).
1
7
Reset
OCR (Open Circuit Reset)
Upon reconnection of battery, Model 906 will reset at
or above proper voltage level.
HVR (High Voltage Reset)
Model 906 stays connected to battery during charging.
Battery must remain at or above proper voltage level for
a continuous 6 minutes.
8
5. TROUBLESHOOTING
The following checklist should help you troubleshoot any
problem with Model 906.
Problem
Possible Cause
Keyswitch On
and no display
Terminals not connected or improper voltage,
Keyswitch not high
Stays at Full
Model 906 voltage does not match
battery voltage
Will not reset
Model 906 voltage does not match battery
voltage or battery not fully charged
Not connected directly to battery terminals
Reset without
charging battery
Empty too soon Model 906 voltage does not match battery
voltage or terminals not connected directly
to battery
9
6. MAINTENANCE
Curtis Model 906 series is not field serviceable. Return defective units to your distributor for warranty coverage.
10
Guarantee - Curtis Instruments’ products and/or components
are guaranteed against defects in workmanship and material
for a period of one year, or as defined in the individual product
literature, from date of shipment from our factory, when applied
in a proper application within specified ratings. This guarantee
is limited to repair or replacement F.O.B. our factory. There is
no further warranty or implied representation, guarantee,
promise or agreement as to any Curtis Instruments product
and/or component. Curtis Instruments, Inc., cannot assume
responsibility or accept invoices for unauthorized repairs to
its products and/or components, even though defective. In no
case will Curtis Instruments’ responsibility extend to products,
components or equipment not of its manufacture. Under no
circumstances shall Curtis Instruments, Inc., be liable for any
special or consequential damages or loss of profits or other
damages. Returned goods will not be accepted unless
identified by a Curtis Return Material Authorization (RMA).
All specifications are subject to change
without notice.
26.70
CURTIS INSTRUMENTS, INC.
200 Kisco Avenue, Mt. Kisco, NY 10549
Tel. (914) 666-2971 • FAX (914) 666-2188
www.curtisinst.com
53015 REV E 8/06
50020 REV E 7/07
9.5