Humboldt H-4621 User manual

U.S. and Metric Suspension Scales (H-4621) Page 1of 10
Instruction Manual Rev.0; August 01, 2003
Copyright 2003 Humboldt Mfg. Co., Norridge, IL. 60706, U.S.A.
All rights reserved. Printed in U.S.A.
Manufactured by:
Humboldt Mfg. Co.
7300 West Agatite Avenue
Norridge, Illinois 60706 U.S.A.
Customer Service:
Tel: [phone]
Fax: [phone]
Email: [email protected]
USA Toll Free: 1.800.544.7220
Website: www.humboldtmfg.com
Sold and Serviced by:
Humboldt and Authorized Dealers Worldwide
H-4621
Instruction Manual
U.S. AND METRIC SUSPENSION
SCALES

U.S. and Metric Suspension Scales (H-4621) Page 2of 10
Instruction Manual Rev.0; August 01, 2003
Copyright 2003 Humboldt Mfg. Co., Norridge, IL. 60706, U.S.A.
All rights reserved. Printed in U.S.A.
TABLE OF CONTENTS
Page
1. Introduction ..……………………………… 3
2. Specifications ..……………………………… 3
3. Operations ..……………………………… 4
4. Warranty ..……………………………… 5
5. Drawing ..……………………………… 6

U.S. and Metric Suspension Scales (H-4621) Page 3of 10
Instruction Manual Rev.0; August 01, 2003
Copyright 2003 Humboldt Mfg. Co., Norridge, IL. 60706, U.S.A.
All rights reserved. Printed in U.S.A.
1. Introduction
HIGH ACCURACY, COMPACT DIGITAL HANGING SCALE FOR ALL LOW
CAPACITY WEIGHING NEEDS. Humboldt’s advanced design makes this remarkable
hanging scale the first choice over other electronic units. It’s value packed with the
industry’s most wanted features. Our ultra-high resolution, 12-bit A/D converter
provides highest accuracy available ±0.1% of applied load.
Our unique design flexibility lets you choose the model and weighing capacity you need
–ranging from 25 to 500 lbs / 12.5 to 250 kg. Keypad setup and digital calibration
enhance ease of operation.
All electronics are shock mounted in a weatherproof ABS plastic case. This assures
maximum protection against moisture, dust and rough usage. High visibility ½” / 12 mm
LCD digital readout provides easy reading of weights; membrane push button switches
allow simple trouble-free operation.
Power is supplied by one 9-volt alkaline battery.
ØPeak hold
ØStandard 9V battery
ØUltra long battery life
ØWeighs only 1.6 lbs
ØStainless steel hooks
ØSize of a cell phone
2. Specifications
Capacity: 25, 50, 100, 250, 500 lbs
12, 25, 50, 125, 250 kg.
Graduation: 0.01, 0.02, 0.05, 0.1, 0.2, 0.5 and 1
Power: 9V Alkaline
Size: 3.75W x 2D x 6H inches
94 x 50 x 150 mm
Display: 0.5 inch/12 mm L.C.D.
Temperature Range: -4oF to +140oF
-20oC to +60oC
Controls: On/Off, Zero and lb/kg
2.1 Control:
General: Zero, lb/kg, On/Off
Display: 4 digit LCD

U.S. and Metric Suspension Scales (H-4621) Page 4of 10
Instruction Manual Rev.0; August 01, 2003
Copyright 2003 Humboldt Mfg. Co., Norridge, IL. 60706, U.S.A.
All rights reserved. Printed in U.S.A.
2.2 Electrical
Batteries: 1 (9-volt) size disposal alkaline battery
Resolution: 12 bits A/D delivers over 4,000 internal counts
Auto-Zero: Automatically zeros off errors of zero-load
Battery Life: Over 125 hours of continuous use with an alkaline
battery.
Low Battery Indication: Flashes “bat” when battery is running low; Turns off if
battery power is low enough to affect reliability.
2.3 Performance
Accuracy: ±0.1% of applied load ± display graduation, whichever is greater.
2.4 Environmental
Humidity: 10 to 95% Non-Condensing
Temperature: Operating: -10C to +40C to +75C / -40F to 170F
2.5 Physical
Dimensions: Height: 3.3” (6.2” with hooks) / 8.4 cm (15.7 cm with
hooks)
Width: 4.4” / 11.2 cm
Depth: 2.5” / 6.4 cm
Weight: 1.1 lbs / 0.5 kgs
3. Operations
3.1 On/Off
Press this button to turn the crane scale on. The unit tests itself; when these tests
have completed successfully, the system begins weighing. Press this button again
to turn the unit off.
3.2 Zero
Tells the crane scale to display a zero weight. If you press ZERO with weight on
the pad, that weight becomes the zero condition for the scale. When this weight
is removed, a negative shows until the system is zeroed again.
Note: If this negative number is too large to fit on the display, the scale will
display “zero” until you press ZERO.
The scale contains a feature called Auto Zero Tracking (AZT), which corrects for
slight zero changes during normal operation. If small weights are added slowly,
the crane scale could zero them off.
3.3 Lb/Kg

U.S. and Metric Suspension Scales (H-4621) Page 5of 10
Instruction Manual Rev.0; August 01, 2003
Copyright 2003 Humboldt Mfg. Co., Norridge, IL. 60706, U.S.A.
All rights reserved. Printed in U.S.A.
This button toggles the display between pounds and kilograms. After pressing
this button the unit will display: 1) “Lbs”, if you have now switched to display in
pounds. 2) “I-gs (for Kgs), if you have now switched to display in kilograms.
3.4 Peak Hold Mode
To get into peak hold mode press the Lb/Kg and Zero keys together (Calibration
blocking shunt must be in place). The unit will momentarily display “Peak”. In
this mode the unit will display only the highest force applied to the pad –until
you press the Zero key. To exit peak hold mode press the Lb/Kg and Zero keys
together again. The unit will momentarily display “nor” to indicate you have
switched back to normal operating mode.
Note: The unit will always turn on in “normal” operating mode.
3.5 Changing the Battery
Turn the power off. Slide the battery hatch down. Next, remove the battery from
the case and unsnap the used battery. Snap in the new battery and replace the
battery in the case. Replace the cover.
3.6 Error Messages
Over: The crane scale is over capacity. Reduce the load on the pad.
Zero: Display error, the crane scale is unable to display the negative number
completely. Press the ZERO button to re-zero the scale thereby
solving the problem. NOTE: Every time you press ZERO the scale
will momentarily “zero”.
Batt: Low battery, the unit requires a new battery. It will shut-off if this
message is ignored for too long.
4. Warranty
Humboldt Mfg. Co. warrants its products to be free from defects in material or
workmanship. The exclusive remedy for this warranty is Humboldt Mfg. Co., factory
replacement of any part or parts of such product, for the warranty of this product please
refer to Humboldt Mfg. Co. catalog on Terms and Conditions of Sale. The purchaser is
responsible for the transportation charges. Humboldt Mfg. Co. shall not be responsible
under this warranty if the goods have been improperly maintained, installed, operated or
the goods have been altered or modified so as to adversely affect the operation, use
performance or durability or so as to change their intended use. The Humboldt Mfg. Co.
liability under the warranty contained in this clause is limited to the repair or
replacement of defective goods and making good, defective workmanship.
CAUTION: Keep hands, clothing and other objects away from
moving parts when the machine is in operation.

U.S. and Metric Suspension Scales (H-4621) Page 6of 10
Instruction Manual Rev.0; August 01, 2003
Copyright 2003 Humboldt Mfg. Co., Norridge, IL. 60706, U.S.A.
All rights reserved. Printed in U.S.A.
5. Drawing
H-4621