null  User manual
MODEL PS-7
DIGITAL PORTION SCALE
OWNER’S MANUAL
8528-M303-O1 Rev C
03/14
CARDINAL SCALE MFG. CO.
203 E Daugherty, Webb City, MO 64870 USA
Ph: 417-673-4631  Fax: 417-673-2153
www.detectoscale.com
Technical Support: Ph: 866-254-8261  [email protected]
INTRODUCTION
TABLE OF CONTENTS
Thank you for purchasing our Detecto Model PS-7
Digital Portion Scale. The PS-7 is equipped with a
Stainless Steel platform that is easily removed for
cleaning. With the included 15V DC adapter, the
scale can be used in a fixed location or with the
rechargeable battery 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.
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.
Installation ………….………..……………….
Unpacking ……………………..…………
Power Supply ….………………..……….
Battery …………………………..………..
Battery Charging .…………..……………
Installing A Replacement Battery ………
Low Battery .........…………..……………
Display Annunciators ………..…..………….
Key Functions ………………..…..………….
Operation …..………….…………………..…
Configuration ………….…………………..…
Gravity Compensation .…………………..…
Display Messages ………………..………….
Care and Maintenance …………………..…
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SPECIFICATIONS
Weight Display … 1.0 inch backlit LCD, 5 Digit
with fraction
Dimensions:
8.03" W x 7.87" D x 2.44" H
(204mm x 200mm x 62mm)
Platform Size
8.02" W x 4.96" D
(203.8mm x 126mm)
Zero
Established on power up
routine and maintained by
auto-zero circuitry.
Power
115 VAC 50/60Hz or 230 VAC
50/60 Hz powering a 15 VDC
300 mA wall plug-in UL/CSA
listed power supply or one (1)
rechargeable battery.
Tare
100% of full scale capacity
Temperature
40° to 105°F (5° to 40°C)
Humidity
25% ~95% RH
7lb x 0.1oz, 112 oz x 0.1oz,
112 oz x 1/8 oz,3000g x 1g
7 lb x 0.005 lb
Keys
ON/OFF, ZERO/BACK LIGHT,
UNITS
Features
Low battery indicator, Power
saving selectable timing, auto
shut-off
PRECAUTIONS
Serial Number_______________________
Date of Purchase ____________________
Purchased Form_____________________
___________________________________
___________________________________
Before using this instrument, read this
manual and pay special attention to all
"WARNING" symbols:
IMPORTANT
RETAIN THIS INFORMATION FOR FUTURE USE
8528-M303-O1  PS-7
ELECTRICAL
WARNING
1
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 15VDC adapter or use the internal rechargeable battery pack. 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 the supplied
15VDC, 300 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.
BATTERY
The scale is shipped with an internal rechargeable battery pack (7.2VDC, 700 mA). The battery
is contained in a cavity inside the scale. Access is via a removable cover on the bottom of the
scale. The PS-7 can operate for up to 20 hours of continuous use with a fully charged battery
pack. Full charging the rechargeable battery pack before the first use is necessary.
BATTERY CHARGING
To recharge the battery pack, the power supply must be connected to an AC power outlet and
plugged into the scale. It will take approximately 8.5 hours to fully recharge the battery pack in
the scale. While the batteries are charging the PS-7 can still be operated.
Red light: The battery is charging.
Green light: The battery is fully charged.
When the scale is connected to the AC power supply, the charging light will flash three (3) times
between Red and Green and then turn Red and stay on indicating the battery is charging. Note
that if the battery is not connected to the scale, the charging light will turn off after flashing
between Red and Green.
Charging the battery pack for more than 8.5 hours will not damage it but the lifetime of
rechargeable battery pack may be shortened.
If the power supply is disconnected before the 8.5 hours, the scale will continue to charge the
battery pack when the power supply is plugged back in.
8528-M303-O1  PS-7
1
INSTALLATION, CONT.
INSTALLING A REPLACEMENT BATTERY
When the scale can not be operated by a full charged rechargeable battery pack well (continue
to show “LobAt” or automatically shut off during operation or not switch on….), it’s time to
replace the rechargeable battery pack.
1. Turn scale over so that display is facing
down and place it upside down on a flat
level surface, such as a table or bench.
2. Locate battery cover on bottom of scale.
3. Remove cover by pushing in on tab and
pulling up exposing battery snap connector.
4. Remove old battery and disconnect power
cable and then connect new battery.
5. Replace cover (it will click when locked in
place) and return scale to upright position.
Push here
and pull up
6. Check scale for proper operation.
LOW BATTERY Lobat
When the rechargeable battery pack is near the point it needs to be recharged, a low battery
indicator on the display will turn on. 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 plug-in the 15VDC adapter.
DISPLAY ANNUNCIATORS
The annunciators are turned on to indicate that the scale display is in the mode corresponding to
the annunciator label or that the status indicated by the label is active.

The  annunciator is turned on when the weight display is stable.
lb
The lb annunciator is turned on to indicate that the displayed weight is in pounds.
oz
The oz annunciator is turned on to indicate that the displayed weight is in ounces.
lb oz
Both the lb and oz annunciators are turned on to indicate that the displayed weight is in pounds
and ounces.
oz 1/8
The oz 1/8 annunciator is turned on to indicate that the displayed weight is in 1/8 ounce.
g
The g annunciator is turned on to indicate that the displayed weight is in grams.
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8528-M303-O1  PS-7
KEY FUNCTIONS
UNITS
1. Press to change the weighing units to the alternate units of measurement (if selected
during configuration of the scale).
2. Press to select menu in the Configuration mode.
ZERO
1. Press to reset the display to tare up to 100% of the scale capacity.
2. Press and hold ZERO key and ON/OFF key for 3 seconds to enter Configuration mode.
3. Press to confirm the setting for each menu.
4. In Gravity Compensation mode, press the ZERO key to choose number from 0~9.
ON/OFF
1. Press and release to turn on scale.
2. Press and release to turn the scale off.
3. Press to confirm setting in Gravity Compensation mode.
OPERATION
TURN THE SCALE ON
Press the ON/OFF key to turn the scale on.
The scale will display
88888
then change to the selected weighing units.
SELECT THE WEIGHING UNIT
Press the UNITS key to alternate between the selected weighing units. NOTE! Multiple
weighing units must be enabled during configuration for this function to be operational.
WEIGH
Place the item to be weighed on the scale tray, wait a moment for the scale display to
stabilize and then read the weight.
TO RE-ZERO THE WEIGHT DISPLAY
To re-ZERO (tare) the weight display, press the ZERO key and continue. The scale will
re-ZERO (tare) until the full capacity is reached.
The membrane keyboard is not to be operated with pointed objects (pencils,
pens, fingernails, etc). Damage to keyboard resulting from this practice will
NOT be covered under warranty.
8528-M303-O1  PS-7
3
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 BEGIN CONFIGURATION:
1. Press and hold the ZERO key and the ON/OFF key for 3 seconds.
2. When the display shows Set , release the keys to enter the Configuration mode. The
display will change to show Unit .
3. Press the UNIT key . The display change to End . you can Press Zero key to save set
and return to weighing mode
WEIGHING UNITS
To select “lb/OZ” (pounds/ounce) weighing units:
1. With the display showing Unit , press the ZERO key to enter select unit function. The
display will change to show both “lb” and “OZ”.
2. Press ZERO key to display On .
3. Press the UNIT key to toggle between:
Enable (display will change to On ) or
Disable (display will change to OFF ).
4. Press the ZERO key and then the UNIT key 5 times. The display will change to Unit .
5. Proceed to AUTOMATIC SHUTOFF.
To select “OZ” (ounce only) weighing units
1. With the display showing Unit , press the ZERO key and then the UNIT key. The
display will change to show “OZ”.
2. Press the ZERO key to display OZ status.
3. Press the UNIT key to toggle between:
Enable (display will change to On ) or
Disable (display will change to OFF ).
4. Press the ZERO key and then the UNIT key 4 times. The display will change to Unit .
5. Proceed to AUTOMATIC SHUTOFF.
To select “1/8 OZ” (fractional ounce) weighing units:
1. With the display showing Unit , press the ZERO key and then the UNIT key 2 times.
The display will change to show “OZ” and “1/8”.
2. Press ZERO key to display 1/8 OZ status.
3. Press the UNIT key to toggle between:
Enable (display will change to On ) or
Disable (display will change to OFF ).
4. Press the ZERO key and then the UNIT key 3 times. The display will change to Unit .
5. Proceed to AUTOMATIC SHUTOFF.
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8528-M303-O1  PS-7
CONFIGURATION, Cont.
To select “g” (gram) weighing units:
1. With the display showing Unit , press the ZERO key and then UNIT key 3 times. The
display will change to show “g”.
2. Press ZERO key to display g (gram) status.
3. Press the UNIT key to toggle between:
Enable (display will change to On ) or
Disable (display will change to OFF ).
4. Press the ZERO key and then the UNIT key 2 times. The display will change to Unit .
5. Proceed to AUTOMATIC SHUTOFF.
To select “lb” (pounds only) weighing units:
1. With the display showing Unit , press the ZERO key and then UNIT key 4 times. The
display will change to show “lb”.
2. Press ZERO key to display lb status.
3. Press the UNIT key to toggle between:
Enable (display will change to On ) or
Disable (display will change to OFF ).
4. Press the ZERO key and then the UNIT key. The display will change to Unit .
5. Proceed to AUTOMATIC SHUTOFF.
AUTOMATIC SHUTOFF
1. With the display showing Unit , press the press UNIT key. The display will change to
show AOFF .
2. Press the ZERO key to begin selection of the automatic shut-off time (in seconds). The
display will change to show 120 .
3. Press the UNIT key to toggle through the selections, 120, 180, 240, 300, or OFF.
4. When the desired time is displayed, press the ZERO key. The display will change to show
AOFF .
5. Proceed to GRAVITY COMPENSATION.
GRAVITY COMPENSATION
1. With the display showing AOff , press the press UNIT key. The display will change to
show GRAU .
2. With the display showing GrAu , press ZERO to enter the Gravity compensation mode.
To Enable the Gravity Compensation mode, press the UNIT key. The display will
change to On .
To Disable the Gravity Compensation mode, press the UNIT key. The display will
change to OFF .
3. Press the ZERO key again. The display will change to show GrAu .
4. Press the UNIT key. The display will change to show End .
5. Press the ZERO key to save the settings and reset the scale.
6. Setup is complete.
8528-M303-O1  PS-7
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GRAVITY COMPENSATION
The Gravity Compensation for your scale has been pre-configured at the factory and should not
require changing in most locations. In the event that the factory settings do not meet the
requirements of your location, contact the factory for the value for your location.
With GrAu enable from the function setting of the Configuration mode, the scale will use
the factory set value of 9.797 for the Gravity Compensation.
If the GrAu is disabled, the scale will use the value obtained from the factory and entered
by the operator for the Gravity Compensation.
Changing the Gravity Compensation value:
1. Press the ON/OFF key to turn on the scale.
2. Press and hold the UNITS key 3 seconds to enter Gravity Compensation mode, the
display will show 9.797 (or the current value).
3. Enter the desired gravity value (press the ZERO key to choose number from 0~9, and
press UNITS key to move to right digit.
4. Press ON/OFF key (to confirm the entered gravity) and return the scale to the normal
operating mode.
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8528-M303-O1  PS-7
DISPLAY MESSAGES
DISPLAY
MEANING
LobAt
Low battery indication
ErrE
ErrL
--------ErrH
SpnH
ooooo
ooooo
E2prom Error
Zero count under 128
Over capacity (upper dashes)
Under capacity (lower dashes)
Zero count over 25,000
Calibration span too high
Power-on zero count over
calibration zero (+10%)
Power-on zero count under
calibration zero (-10%)
CARE AND MAINTENANCE
The heart of the PS-7 Digital Portion Scale is a precision load cell located in the center of the
scale base. It will provide accurate operation indefinitely if protected against overload of scale
capacity, dropping items on scale, or other extreme shock.

DO NOT submerge the scale in water, pour or spray water directly on it.

DO NOT use acetone, thinner or other volatile solvents for cleaning.

DO NOT expose scale to direct sunlight or temperature extremes.

DO NOT place scale in front of heating/cooling vents.

DO clean the scale with a damp soft cloth and mild non-abrasive detergent.

DO remove power before cleaning with a damp cloth.

DO provide clean AC power and adequate protection against lightning damage.

DO keep the surroundings clear to provide clean and adequate air circulation.
8528-M303-O1  PS-7
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IN-8299 80001A
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8528-M303-O1  PS-7
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