Midmark 8450 Operation Manual

MODEL 8450

Small Animal Scale

Operation Manual

MidMark Corporation

PO Box 431

Carthage, Missouri 64836

USA

Phone: [phone]

Fax: [phone]

midmark.com

1

PRECAUTIONS

Before using this instrument, read this
manual and pay special attention to all
"NOTIFICATION" symbols:

IMPORTANT ELECTRICAL

WARNING

INTRODUCTION

Thank you for purchasing the Midmark Model
8450 Small Animal Scale. The 8450 comes
complete with a one-piece platform and base
with padded handles. With a 9V DC adapter
(not included) the scale can be used in a fixed
location or with a 9V battery (not included) as a
portable scale.

This manual will guide you through installation,
and operation of your scale. Please read it
thoroughly before attempting to operate this
scale and keep it handy for future reference.

FCC COMPLIANCE STATEMENT

This equipment generates, uses and can radiate
radio frequency and if not installed and used in
accordance with the instruction manual, may cause
interference to radio communications. It has been
designed within the limits for a Class A computing
device pursuant to Subpart J of Part 15 of FCC rules
to provide reasonable protection against such
interference when operated in a commercial
environment. Operation of this equipment in a
residential area may cause interference in which
case the user will be responsible to take whatever
measures necessary to correct the interference.

You may find the booklet "How to Identify and Resolve
Radio TV Interference Problems" prepared by the
Federal Communications Commission helpful. It is
available from the U.S. Government Printing Office,
Washington, D.C. 20402. Stock No. 001-000-00315-4.

COPYRIGHT

All rights reserved. Reproduction or use, without
expressed written permission, of editorial or pictorial
content, in any manner, is prohibited. No patent
liability is assumed with respect to the use of the
information contained herein.

DISCLAIMER

While every precaution has been taken in the
preparation of this manual, the Seller assumes no
responsibility for errors or omissions. Neither is any
liability assumed for damages resulting from use of
the information contained herein. All instructions and
diagrams have been checked for accuracy and ease
of application; however, success and safety in
working with tools depend to a great extent upon the
individual accuracy, skill and caution. For this reason
the Seller is not able to guarantee the result of any
procedure contained herein. Nor can they assume
responsibility for any damage to property or injury to
persons occasioned from the procedures. Persons
engaging the procedures do so entirely at their own
risk.

TABLE OF CONTENTS

Introduction …………………………………..

1

Specifications ………………………………..

1

Installation ……………………………………

2

Unpacking ………………………………...

2

Power Supply ……………………………..

2

Battery …………………………………….

2

Low Battery ……………………………….

3

Display And Key Functions …………………

3

Features ……………………………………...

3

Configuration ………………………………...

4

Display Messages …………………………...

5

SPECIFICATIONS

Power
Requirements:

9V battery or 9V
100mA DC adapter

Capacity:

44 lb x 0.02 lb, 704 oz x

0.5 oz (20 kg x 0.01 kg)

Weight Units:

lb, oz, lb/oz, kg

Display:

1.0” LCD display with 4
1/2 active digits

Operation
Temperature:

41 to 95 ºF (5 to 35 ºC)

Function Keys:

TARE/ON/OFF,
KG/LB, MEMORY

Dimensions:

Scale with handle:

24 x 14 x 2 in.
(620 x 350 x 50 mm)

Platform surface:

20 x 14 x 2 in.
(500 x 350 x 50 mm)

Serial Number_______________________
Date of Purchase ____________________
Purchased Form_____________________

___________________________________
___________________________________

RETAIN THIS INFORMATION FOR FUTURE USE

2

INSTALLATION

UNPACKING

Before beginning installation of your scale, make certain the instrument has been received in
good condition. When removing the scale from its packing, inspect it for signs of damage, such
as exterior dents and scratches. Keep the carton and packing material for return shipment if it
should become necessary. It is the responsibility of the purchaser to file all claims for any
damages or loss incurred during transit.

1. Remove the scale from the shipping carton and inspect it for any signs of damage.

2. Plug-in the 9VDC adapter or install the battery. Refer to the POWER SUPPLY or
BATTERY sections of this manual for more instruction.

3. Place the scale on a flat level surface, such as a table or bench.

4. The scale is now ready for use.

POWER SUPPLY

To apply power to the scale using a 9VDC, 100 mA power supply, insert the plug from the power
supply cable into the power jack on the back of the scale and then plug power supply into the
proper electrical outlet. The scale is now ready for operation.

DO NOT connect the plug-in power supply to
the scale with a battery installed in the scale.

BATTERY

The scale can use a "9V" size alkaline battery (not included). If you wish to operate the scale
from a battery, you must first obtain and install the battery. The battery is contained in a holder
inside the scale. Access is via a removable panel on the right end of the bottom of the scale.

INSTALLING THE BATTERY

1. Turn the scale over so that the
display is facing down and place it
upside down on a flat level surface,
such as a table or bench.

2. Locate the battery door on the
bottom of the scale.

3. Remove the battery door by
pushing in on the "arrow" and
sliding the battery door in the
direction of the arrow.

4. Slide the battery door about 1/2
inch, lift and remove exposing the
battery snap connector.

5. Connect the snap connector to a 9
volt battery and place the battery in
the holder.

6. Place the battery door on the scale

and slide it the “opposite” direction

of the arrow until you hear it click
and lock in place.

3

INSTALLATION, CONT.

LOW BATTERY

When the battery is near the point it needs to be replaced, a low battery indicator will be
displayed. If the battery voltage drops too low for accurate weighing, the scale will automatically
shut off and you will be unable to turn it back on. When the low battery indicator is displayed, the
operator should replace the battery or remove the battery and plug-in the 9VDC adapter.

DISPLAY AND KEY FUNCTIONS

KEY FUNCTIONS

ON/ZERO/OFF

1. Press this key to turn the scale on.

2. Press this key and hold for 2 seconds to turn the scale off.

3. Press this key with the scale on to zero the scale.

Kg / Lb

Press this key to switch unit between kg, lb, oz and lb/oz.

MEMORY

Press to recall and release the weighing value.
If the weight is less than 1kg, press this key to recall the stored value of weight.
If the weight value is greater than 1kg, press this key to store the weight value.

FEATURES

MEMORY

 When power on, the Memory feature will auto switch on and the arrow besides

HOLD at left bottom of LCD will flicker.

 When the loaded weight is above 1kg and stable, the arrow stops flickering.
 To disable the Memory function, press TARE/ON/OFF key again

AUTO OFF

The scale will automatically shut-off after 2 minutes of nonuse to conserve the battery.

4

CONFIGURATION

Your scale has been pre-configured at the factory and should not require configuration for use in
most applications. In the event that the factory settings do not meet the requirements of your
application, the following describes the steps to configure the scale.

TO START CONFIGURATION

1. Press the TARE/ON/OFF key to turn on the scale.

2. Press and hold the Kg / Lb key for 3 seconds.

3. When the display shows Set , release the Kg / Lb key.

4. The display will change to show Unit .

WEIGHING UNITS

To select “Kg” weighing units

1. With the display showing Unit , press the MEMORY key.

2. The display will change to an arrow ^ pointing to kg.

3. Press the MEMORY key to display the kg status.

4. Press the Kg / Lb key to toggle between:

“Enable” (display will change to On ) or “Disable” (display will change to OFF ).

5. Press the MEMORY key and then the Kg / Lb key 4 times.

6. The display will change to Unit .

7. Proceed to AUTOMATIC SHUTOFF.

To select “Lb” weighing units

1. With the display showing Unit , press the MEMORY key and then Kg / Lb key.

2. The display will change to an arrow ^ pointing to lb.

3. Press the MEMORY key to display the lb status.

4. Press the Kg / Lb key to toggle between:

“Enable” (display will change to On ) or “Disable” (display will change to OFF ).

5. Press the MEMORY key and then the Kg / Lb key 3 times.

6. The display will change to Unit .

7. Proceed to AUTOMATIC SHUTOFF.

To select “oz” weighing units

1. With the display showing Unit , press the MEMORY key and then Kg / Lb key 2 times.

2. The display will change to an arrow ^ pointing to oz.

3. Press the MEMORY key to display the oz status.

4. Press the Kg / Lb key to toggle between:

“Enable” (display will change to On ) or “Disable” (display will change to OFF ).

5. Press the MEMORY key and then the Kg / Lb key 2 times.

6. The display will change to Unit .

7. Proceed to AUTOMATIC SHUTOFF.

To select “lb/oz” weighing units

1. With the display showing Unit , press the MEMORY key and then Kg / Lb key 3 times.

2. The display will change to show arrows ^ ^ pointing to both lb and oz.

3. Press the MEMORY key to display the lb/oz status.

4. Press the Kg / Lb key to toggle between:

“Enable” (display will change to On ) or “Disable” (display will change to OFF ).

5. Press the MEMORY key and then the Kg / Lb key.

6. The display will change to Unit .

7. Proceed to AUTOMATIC SHUTOFF.

5

CONFIGURATION, CONT.

AUTOMATIC SHUTOFF

1. With the display showing Unit , press the Kg / Lb key.

2. The display will change to show AOFF .

3. Press the MEMORY key to begin selection of the automatic shut-off time (in seconds).

4. The display will change to show 120 .

5. Press the Kg / Lb key to toggle through the selections, 120, 180, 240, 300, or OFF.

6. When the desired time is displayed, press the MEMORY key.

7. The display will change to show AOFF .

TO COMPLETE CONFIGURATION

1. With the display showing AOFF , press the Kg / Lb key.

2. The display will change to show CAP .

3. Press the Kg / Lb key.

4. The display will change to show diuS .

5. Press the Kg / Lb key.

6. The display will change to show GrAu .

7. Press the Kg / Lb key.

8. The display will change to show End .

9. Press the MEMORY key.

10. Configuration is complete and the new settings have been saved.

DISPLAY MESSAGES

DISPLAY

MEANING

Low battery indication

ErrE

E2prom Error

Errl

Under Zero

Err

Over Zero or
Over Capacity

Manufacturer’s Declaration of Conformity

This product has been manufactured in accordance with the
harmonized European standards, following the provisions of

the below stated directives:

Electro Magnetic Compatibility Directive 2014/30/EU

Low Voltage Directive 2014/35/EU

Cardinal Scale Manufacturing Company

6

IN-1020 7018F 8535-M175-O1 Rev C 08/17