Measurement Systems MSI5300 User manual

Measurement
Systems
International
User
Guide
Quality
Industrial
Weighing
and Force
Measurement
Equipment
LOAD RANGER
WHEEL LOAD WEIGHERS
MSI5300

Page 2 MSI-5300 Load Ranger Electronic Wheel Load Weighers •User Guide
M E A S U R E M E N T S Y S T E M S I N T E R N A T I O N A L
Program Number Capacity and Resolution
Serial Number Cal Number
IMPORTANT
Please read this manual carefully before using the Load Ranger

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TABLE OF CONTENTS
General Description .................................................. 3
Specifications ............................................................ 3
Unpacking ................................................................. 3
Operational Controls and Indicators......................... 4
Figure 1-Switch and Display Functions .................... 4
Basic Operation......................................................... 4
Display Functions ..................................................... 5
Figure 2-Low Battery Message ................................. 6
ZERO Switch Function.............................................6
Recommended Methods and Procedures for
Vehicle Weighing ..................................................... 6
Battery Charger Operation........................................ 6
Battery Removal ....................................................... 6
Figure 3-Illustrated Weighing Procedures ............... 7
Charging the battery ................................................. 8
Figure 4-Battery Charger AC Selector
Switch Location .......................................................... 8
Figure 5-Battery to Charger Insertion/Removal ........ 9
Instructions for Low Temperature Operation............ 9
Calibration Procedure ............................................. 10
Figure 6-Calibration Adjustment ............................. 10
The MSI Limited Warranty ..................................... 12

Page 4 MSI-5300 Load Ranger Electronic Wheel Load Weighers •User Guide
M E A S U R E M E N T S Y S T E M S I N T E R N A T I O N A L
GENERAL DESCRIPTION
The MSI-5300 Load Ranger is a self-contained wheel load weighing scale
designed for maximum flexibility, portability and simplicity in providing an
accurate and reliable mobile weighing system.
SPECIFICATIONS
Accuracy: 1.0% Approved to NIST, Class IV standard
Capacity: 20,000 lbs. (10,000 kgs)
Resolution: 20 lbs. (10 kgs) 50 lbs. (20 kgs) - NIST
Power: 6 volt rechargeable / 40 hours between charging
Battery Charger:
115/230 VAC External or 12 VDC External (will charge up to 4
batteries simultaneously)
Display: 5 digit, 0.8 inch (20mm) Liquid Crystal Display
Annunciators: Low Battery
Operating Temperature:
-25°to 140°F (-32°to 60°C)
Safe Overload: 150% of capacity
Ultimate Overload:
200% of capacity
Weigh Pad Dimensions:
24.0 L x 15.5 W x 3.0 H inches (609 x 393 x 76 mm)
Weight: 43 lbs. (19 kg) per pad
Controls: On/Off and Zero switches
Enclosure: • Environmentally sealed, corrosion-resistant cast aluminum.
• Shock mounted electronics.
• Skid resistant rubber base pads.
UNPACKING
When unpacking insure that all items ordered are accounted for. Inspect all
items carefully for any visible damage and immediately report any damage to
your shipping agent. Verify receipt of all items ordered including:
1. Weigh Pads 3. Battery Charger (optional) 5. Warranty Card
2. Battery(ies) 4. Owners Manual
Please use the original shipping container when shipping the Load Ranger.
Please complete the warranty registration card and mail to Measurement
Systems International to register your warranty.

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OPERATIONAL CONTROLS AND INDICATORS
This section summarizes the switch and display functions (See Figure 1):
Figure 1
Switch and Display Functions
1) On/Off – Pushing this switch alternately turns the weigh pad on and off.
2) Zero – Pushing this switch sets the display to zero.
3) Display – Five-digit numeric display indicates the amount of weight
placed on the scale as well as test and warning messages.
BASIC OPERATION
Power Up Self-Test
When the weigh pad is turned on, the following sequence is displayed:
1) Display Test – Proper display operation is verified as all display
segments are first turned on (display shows “=88888”) and then off
again for several seconds. This allows the operator to detect faulty
segments which fail to illuminate.
2) Program Number – This is the version number of the microcomputer
software controlling scale operation. This number is displayed in the
format P-XX where XX is the version number of the software program
currently installed.

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3) Zero Offset – This numeric value indicates the weight that must be
internally subtracted to cause the scale to display zero weight with no
applied load. (If this number exceeds ±500 lbs. or ±250 kg with no
weight applied, the scale may require servicing).
4) CAL Number – This number represents an internally simulated weight
applied to the scale electronics. With no weight on the pad this number
should agree with the CAL Number stamped on the serial number plate
within plus or minus two scale divisions. (One scale division is the
scales smallest unit of resolution. For example, one scale division for a
20,000 x 20 lb. capacity scale is 20 lbs.).
DISPLAY FUNCTIONS
After the power-up self-test is complete the scale automatically zeroes so that a
weight reading of “00” will appear. In addition to displaying the weight reading
when the scale is loaded, three other conditions may be displayed:
1) Overrange Message:
If the weight applied to the scale exceeds its rated capacity by more than
approximately 4%, the message “EEEE” will flash on the display. For
example: 20,000 lb. (10,000 kg) capacity, the overrange threshold will
be approximately 20,800 lb. (10,400 kg).
2) Minus Sign:
A minus sign to the left of the weight reading indicates negative weight
relative to the actual weight applied to the scale the last time the zero
button was pushed. For example, a display reading of -1200 lbs.
indicates the current weight on the pad is 1200 lbs. less than the weight
on the scale the last time the Zero button was pushed.
3) Low Battery Message:
When the battery is approximately 90% discharged, a low battery tick in
the upper left corner of the display (just above the minus sign) will
begin to flash. The scale will continue to operate for 1 to 2 hours after
the tick begins to flash, after which the scale will automatically turn off
to prevent scale error and battery damage due to excessive discharge.

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M E A S U R E M E N T S Y S T E M S I N T E R N A T I O N A L
Figure 2
Low Battery Message
ZERO SWITCH FUNCTION
During normal weighing operations it is not necessary to use the zero switch. It
may be necessary to zero the weight display due to environmental effects such
as temperature change.
Another function of the zero switch is found in net weighing applications where
a tare weight (such as an empty truck) is placed on the scale and the Zero
button switch is pushed to zero the display. The pad will now display the net
weight (the weight of the vehicle payload as it is loaded).
RECOMMENDED METHODS AND PROCEDURES FOR VEHICLE WEIGHING
Accurate weighing of highway vehicles requires using a sufficient number of
properly placed pads for the type of vehicle (number of axles etc.) being
weighed. See Figure 3 to determine the number of weigh pads required.
BATTERY CHARGER OPERATION
Battery Removal
To remove the battery from the scale, turn the pad over and locate the battery
access cover. Use a screwdriver to remove the (3 each) flathead screws, pull the
cover and remove the battery.

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Figure 3
Illustrated Weighing Procedures

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CHARGING THE BATTERY
The Load Ranger battery charger will charge up to four batteries at one time in
approximately 6 hours. The battery charger has both an AC and a DC power
cord for operation for 115 V/230 V, 50 /60 Hz AC power or 12 VDC vehicular
power. The AC power cord is permanently connected and may be wrapped
around the charger handle when not in use. The DC power cord plugs into the
12 VDC power receptacle on the charger.
Note: The DC power cord must be unplugged from the charger when AC
power is preferred.
Note: When powering the charger from the AC supply verify that the 115/230
V selector switch is in the appropriate position (See Figure 4).
.
Figure 4
Battery Charger AC Selector Switch Location
When powering the charger from a 12 VDC source the DC power cord pigtails
are connected as follows:
1) The red pigtail connects to the positive 12 VDC supply terminal.
2) The black pigtail connects to the negative 12 VDC supply terminal.
3) The white pigtail connects to the ground (chassis or frame of vehicle).
The 12 VDC power source must be capable of supplying at least 3 amps at 11-
15 VDC. It is advisable to connect the positive and negative leads to a fused
circuit not shared by other vehicular loads. The electrical connection to the
vehicle battery should be as direct as possible.

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After the battery charger power is connected, the red status lamps next to each
of the battery wells will illuminate to indicate the battery charger is functioning
properly and is ready to receive the discharged batteries. The discharged
batteries may now be inserted into the battery wells. Check alignment of battery
terminals with battery charger clips and adjust battery position as necessary
while pushing the battery into place (See Figure 5).
Figure 5
Battery to Charger Insertion/Removal
The status lamp nearest the inserted battery should now go out indicating that
the battery is charging.
When the lamp illuminates, the battery has been charged to at least 80% of its
capacity. This takes about 4 hours to charge a fully discharged battery. An
additional 2 hours of charging is required to reach full capacity. The battery
may be left on charge as long as desired without harm to the battery.
After the battery is fully charged, remove it by gripping firmly and lifting the
terminal end upward. The battery should slide clear of the battery terminal clips
and be easily removed from the enclosure.
INSTRUCTIONS FOR LOW TEMPERATURE OPERATION
1) Display
At temperatures below 14°F (-10°C) the display may respond somewhat
slower (up to a few seconds) to weight changes but will otherwise
function properly at temperatures as low as -25°F (-32°C).
2) Battery
At temperatures below 16°F (-9°C) there is a possibility the battery
electrolyte may freeze, making the scale inoperative and possibly damag-
ing the battery. However, if the battery is not allowed to discharge to less

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than 50% of its capacity (about 15 hours of operation on a fully charged
battery) it will not freeze at temperatures above -35°F (-37°C). There-
fore, to prevent freezing we recommend that when the temperature is
below 16°F (-9°C) the battery be recharged after no more than 15 hours
of operation.
3) Charging
The battery charger will charge the battery at temperatures as low as -5°F
(-20°C). However, a battery with frozen electrolyte must not be re-
charged until the electrolyte has had time to thaw. If freezing is sus-
pected, allow the battery to thaw for several hours at room temperature
before attempting recharge.
CALIBRATION PROCEDURE
A maintenance check is accomplished by periodically comparing the CAL
number displayed during the power up self-test sequence with the factory
established CAL number stamped on the serial number plate on the scale or a
new CAL number established at the most recent recalibration. This check only
verifies the proper operation of the electronic portion of the scale. For com-
plete scale accuracy verification and/or recalibration follow the steps below:
1) With the scale turned on, exercise the scale by loading it to capacity and
unloading. Repeat this procedure three times.
2) With no weight on the scale, turn the unit off and then on again. Wait for
the scale to complete the power-up self-test. Record the zero off set
number which follows the P-XX program number Verify the display
reads “00” after the self-test sequence is completed.
3) Unscrew the calibration access plug and locate the zero adjustment screw
(See Figure 6).
Figure 6
Calibration Adjustment

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Note: Be careful not to change the setting of the balance adjustment screw.
This is factory set to adjust the end-to-end balance of the pad. With a small
screwdriver turn the zero adjustment screw until the display reads the opposite
of the zero offset recorded in step 2. For example, if the zero offset was -250,
adjust until the display reads 250; if the zero offset was 250, adjust until the
display reads -250.
4) Turn the scale off then on again and verify the zero offset is now within
two scale divisions of “00”. If not repeat step 3.
5) Locate the span adjustment screw. Depress the zero switch. Load the
scale to capacity with a known test load. Turn the span adjustment screw
so the display indicates the weight of the test load.
6) Remove the test load. If the display does not return to zero, readjust the
zero screw so the display reads zero. Repeat steps 5 and 6 until the scale
reads the full scale test load weight accurately and returns to zero when
the load is removed.
7) Confirm linearity by checking scale accuracy while applying intermedi-
ate test loads of 25, 50, and 75% of scale capacity. (If necessary, imroved
accuracy over the entire weight range may be obtained by adjusting the
100% capacity reading one or two divisions high or low as required
and rechecking accuracy over the entire weight range).
8) Turn scale off, then on again. Record the zero offset and CAL number
displayed during the self-test sequence. The zero number should be
within two scale divisions of zero. Record the CAL number for future
reference when verifying calibration.
9) Replace the calibration access plug.
10) Your scale is now ready to use.

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THE MSI LIMITED WARRANTY
MEASUREMENT SYSTEMS INTERNATIONAL, INC., WARRANTS load sensing
elements and meters against defects in workmanship and materials for a period
of one year from date of purchase and warrants electrical cables and batteries
against the same defects for a period of ninety (90) days from date of purchase.
Any device which proves defective during the warranty period will be replaced
or repaired at no charge; provided that the defective device is returned to the
Company freight prepaid.
In no event shall the Company be liable for the cost of any repairs or alterations
made by others except those repairs or alterations made with its specific
written consent, nor shall the Company be liable for any damages or delays
whether caused by defective workmanship, materials or otherwise.
The Company shall not be liable for any personal injury or property damage
resulting from the handling, possession or use of the equipment by the cus-
tomer.
The warranty set forth herein is exclusive and is expressly in lieu of all other
warranties, express or implied, including without limitation any implied
warranties of merchantability or fitness, or of any other obligations or liability
on the part of the Company.
The liability of the Company under this warranty is limited solely to repairing
or replacing its products during the warranty periods; and the final judgement
and disposition of all claims will be made by MEASUREMENT SYSTEMS
INTERNATIONAL, INC.