Eagle EI-250 User manual
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ABLE OF CON EN S
I IN RODUC ION 1
II SPECIFICA IONS 1
III INS ALLA ION AND S AR UP 2
IV GENERAL OPERA ION 2
V CALIBRA ION AND ZERO PROCEDURE 3
VI ADJUS ING REMAINING WEIGH ( ARE) 3
VII CONFIGURA ION 3
VIII PARAME ER LIS 4
IX ECHNICAL INFORMA ION 5
WIRING DIAGRAM 5
SCALE INFO AND LOAD CELL REFERENCE 6
I. IN RODUC ION
The EI-25 is an economical weight indicator meant to meet simple
performance requirements or for use in remote locations where power supply
is a concern.
II. SPECIFICA IONS
EI-25 Electronic indicator
Power requirements: 2x, 1.5V D-CELL (LR2 ) Alkaline
Battery life: six-months to one-year
Scale input: .4mV/V to 2.2mV/V
Scale Excitation Resistance: 35 Ω to 1 Ω, single load cell
Scale distance from Indicator: Twenty-five (25) feet or less
Max weight: 999 lbs/kgs
Resolution: .1, .2, .5, 1, 2, or 5
Graduations: 1 typical
Update rate: Four/sec (normal),once/ten-seconds(low-
power mode)
Display: four-digit LCD, .5”
Push buttons: UP, DOWN, & SELECT (Tactile dome)
(optional) 4-2 mA output: Passive, loop powered, 32VDCMAX
4-2 mA burden voltage: 8VDCMAX
4-2 mA output Impedance: >1MΩ
(optional) Relay type: Form-C (N/O & N/C), Latching
Relay voltage rating: 25 VAC or 32VDCMAX
Relay current rating: 5A
Relay type: Mechanical
Temperature: C to 5 C, % non-condensing
Enclosure: Nema 4X
Option boards (field installable): Loop powered 4-2 mA (PN 11 556)
Low-level set point (PN 11 557)
III. Installation and startup
Before opening the box the indicator was shipped in, inspect it
for damage. If damage occurred during shipping file a claim with
the carrier.
1. Choose a location for the scale and indicator
2. The scale should be on a flat surface, refer to the scale manual for full
installation instructions.
3. Bolt the EI-25 indicator to the wall through the enclosures mounting feet. 15
feet of load cell cable is standard on Eagle Microsystems scales but
additional length may be provided if specified at time of order.
4. Open the enclosure and place 2 D-cell batteries in the holder at the rear of
the instrument
5. Bring the load cell cable into the enclosure through the strain relief at the
bottom of the enclosure and wire it to TB1 on the left hand side of the
instrument PCB. Refer to the table at the end of this manual for scale
specific wiring codes
IV. General Operation
The EI-25 has three pushbuttons as shown below:
Pushbutton functions
General function Special function
Down arrow Decreases displayed
value
Press and hold 3 seconds
to adjust remaining weight
Up arrow Increases displayed value Press and hold 3 seconds
to adjust remaining weight
Enter/select Toggles between gross
and remaining weight
Press and hold 3 seconds
to enter calibration mode
V. Calibration and zero procedure
1. Remove all weight from the scale.
2. Press and hold enter/select for 3 seconds OR flip the dip switch labeled “cal” on
the instrument circuit board.
3. Press the enter/select button to zero the scale with no weight on it.
4. Place a known weight on the scale and use the up and down arrows to adjust the
displayed weight on the indicator to match the appropriate gross weight.
5. Exit calibration by pressing and HOLDING the enter/select button for 3 seconds
OR return the dip switch on the circuit board to its normal position.
VI. Adjusting remaining weight(tare)
1. Put the display in remaining mode by pressing the enter/select pushbutton. Look
for the small arrow on the left side of the display.
2. Press and HOLD the up or down arrow for three seconds, the arrow on the left
side of the display will start flashing.
3. Make the adjustment to the remaining weight with the up and down arrows.
4. Press enter/select to return to normal operations.
VII. Configuration
1. Flip the dip switch on the instrument circuit board labeled “setup”.
2. A parameter number will be displayed on the front of the instrument.
3. Use the up and down arrows to navigate between different parameters
4. Press the enter/select pushbutton to view a parameter, use the up and down
arrows to adjust the parameter.
5. Press enter to back out of parameter viewing/editing mode and return to the
parameter list.
6. Flip the “setup” dip switch back to its normal position to return to normal
operating mode.
Parameter List
Parameter number Description Values Notes
P111 Scale resolution /
minimum increment
.1, .2, .5, 1, 2, 5
P112 Averaging / sample
rate
1, 2, 4, 8, 12, 2 ,
auto(adaptive
averaging)
Sets the number of
readings the
instrument will take
before averaging
them and updating
the display.
P113 Auto-Zero On/Off Auto zeroes a
weight less than
1 XP111 when
weight is removed.
P116 Operational
threshold
-Full Scale Automatically
displays remaining if
weight goes over the
threshold
P117 Full scale User defined, based
on scale capacity
limits. Use the full
gross weight of the
container/tank being
weighed.
P5 1 (requires
optional relay card
PN 11 557)
Relay setpoint User defined Energizes the
latching relay if
remaining weight
falls below the set
value.
P61 (requires
optional 4-2 mA DC
output card PN
11 556)
Full scale for analog
output
User defined Sets the weight for
the full 2 mA output
signal
EI-250 Wiring Diagram
EI-250 Wiring Diagram
TB1, Scale input S4, Dip Switches, Gain
TB2, Power
Wiring Legend
Terminal Position Function Notes
TB1 +EX Positive Exitation Refer to scale
reference
page for color
codes
TB1 +SI Positive Signal
TB1 -SI Negative Signal
TB1 -EX Negative Exitation
S4 Gain A Both open=.56 mV/V
B=.75, A=1.35,
AB=2.28
Set as close
as possible to
scale mV/V
S4 Gain B
S4 Setup Enter config. mode
S4 Cal Enter calibration
TB2 + Positive battery conn.
TB2 - Negative battery conn.
(Optional)Set point / relay PN
110557
(Optional)4-20 m output PN
110556
Form C relay:
NC,common,NO
4-2 mA DC loop
power: -/+
SCALE HINGED +EX +SI -SI -EX +SH EX Ω SI Ω NO E
WT-36 4 182 .5 2 Y RED GRN WHT BLK YEL 5 68
DCS-3 2 3 14 .9 1/side N RED GRN WHT BLK YEL 5 317 TB5 (RIGHT CHANNEL)
OR BLU x2 TB4 (LEFT CHANNEL)
EDS-4 4 18 1.1 1 N RED GRN WHT BLK YEL 5 317
LP-431 1 Y
LP-432 2 Y
LP-43 #1 441 2 2 4 N RED GRN WHT BLK YEL 5 711
LP-43 #2 882 4 2 4 N RED GRN WHT BLK YEL 5 785
LP-43 #3 1764 8 2 4 N RED GRN WHT BLK YEL 5 68
LP-43 HD 2 9 72 2 4 N RED GRN WHT BLK YEL
ECS15 x 3 14 3 1 Y GRN RED WHT BLK YEL 5 645
WP1 #1 33 15 1 4 N RED GRN WHT BLK YEL 5 736 or 5 737
WP1 #2 661.5 3 1 4 N RED GRN WHT BLK YEL 5 725
WP1 #3 1323 55 1 4 N RED GRN WHT BLK YEL 5 722
DS75 75 34 2 1 N RED GRN WHT BLK YEL 5 639
ECS4 4 181 1 Y GRN RED WHT BLK YEL 5 645 1K CELL
ECS4 2 4 181 1 Y GRN RED WHT BLK YEL 5 747
HC1 2 9 7 1 Y GRN WHT RED BLK YEL 5 68
C36 4 1814 4 N RED GRN WHT BLK YEL 5 68
C72 8 3629 4 N RED GRN WHT BLK YEL 5 68
SC1 /SC1 B 1 22 2 4 N RED GRN WHT BLK YEL 5 783
Older revisions
WT36 4 1814 .5 2 Y RED GRN WHT BLK YEL 5 123
HC36 4 1814 1 Y RED GRN WHT BLK YEL 5 123 5 535 3 ' CABLE
HC72 8 3629 1 Y RED GRN WHT BLK YEL 5 113
ECS15 x 3 14 3 1 Y RED WHT GRN BLK YEL N/A OBS LOADCELL
FULL-SCALE
lb
FULL-SCALE
kg
FULL-SCALE
mV/V
# LOAD
CELLS
LOAD
CELL
IHPN
EI-250 ROUTING TICKET
SO#: - - DATE:
Program: EI-25 SERIAL #:
Version: PCB REV:
Engineering Setup: Default values
User
Changes
Parameters requiring
option cards Default values User Changes
P111
Resolution
P501
Relay
Setpoint
P112
Averaging
P601
Analog
Output F.S.
P113
Auto-Zero
Off
P116
Operational
T res old
P117
Full-Scale
3 .
INS ALLED HARDWARE OP IONS
4-2 mA DC card Relay card Custom Option Custom
Enclosure
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