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CPS Series Operation Manual
Pocket Scale
Counting Feature
YAMATO CORPORATION
1775 S. Murray Blvd.
Colorado Springs, CO 80916 USA
www.yamatocorp.com
Tel (719) 591-1500 Fax (719) 591-1045
YAMATO TECH CORPORATION
#112-19425 Langley By-Pass
Surrey, B.C. V3S 6K1 Canada
Tel (604) 533-2338 Fax (604) 533-0827
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CPS Series Operation Manual
Table of Contents
I. Name and Function of Parts 1
II. Specifications 1
III. Setup 2
Installing the Battery
Setting the Scale Functions
Calibrating the Scale
IV. Directions for Use 4
Turning the Scale On and Off
Low Battery Condition
Zero the Display
Changing Units of Measurement
Gross Weighing
Net Weighing
Batching
Counting
V. Troubleshooting and Error Messages 6
SAFETY INSTRUCTIONS
Before using the scale, carefully read, understand, and follow the “Safety Instructions” described in this manual. Observe the advice given in
the “Operations” section to ensure proper operation. Keep this operation manual handy for reference.
1) This scale is not an explosion-proof model. Do not use the scale in an atmosphere containing flammable gases or explosive fumes. A fire or an explosion can result.
2) Do not operate the scale if there is smoke or a burnt smell coming from the scale. Remove the batteries immediately. After making sure that there is no danger, consult your dealer.
Never try to repair the scale by yourself.
3) Never step on or sit on the scale. Not only will the scale be damaged, but you may also be injured.
4) Place the item to be weighed in the center of the platform. Items placed on the edge of the platform may fall off and cause injury.
5) When weighing a heavy, large or unbalanced item, make sure the item is stable on the platform, otherwise, an accident may occur.
6) When carrying or moving the scale, be sure to hold it by the bottom of the base. If you hold it by the flip top, the flip top may become detached causing the scale to fall. This will
damage the scale.
7) Do not insert your finger into the gap or holes in the scale. You may be injured.
To prevent damage to the scale
1) Do not push the indicator or keys with sharp objects. They may break or puncture the switch membrane panel.
2) Use the specified power supply and choose a suitable environment. If you do not, the weight readings may be inaccurate and the scale may be damaged.
3) The scale is a sensitive weighing instrument, avoid physical shocks. If you drop something on the scale, step on the platform, or drop it, the scale may be damaged and lose
accuracy.
4) If the scale becomes dirty, wipe it with a soft cloth. For stubborn stains, apply a little neutral detergent and then wipe the scale with a dry cloth. Do not use thinner, benzene, hot
water, or chemical agents on non-metallic parts, all of which can cause deformation, discoloration, or deterioration.
5) Never remove the case. The fine adjustment section may be damaged and you may be injured by sharp edges on the internal parts.
6) Do not place the scale upside down.
7) When the low battery indicator appears, replace all of the batteries. If the scale will not be used for a long period, remove the batteries.
To keep the scale working efficiently
1) Place the scale on a flat stable surface that will support the scale and the load.
2) Do not place the scale in an area exposed to direct sunlight or to wind currents from an air conditioner, otherwise, the weights will not be accurate.
3) Do not place the scale near machines that create vibrations or electromagnetic disturbance, such as microwave ovens, portable phones, or large motors. This will affect the accuracy.
4) The operating temperature range is from 10°C to 35°C (50°F to 95°F). Do not subject the scale to sudden temperature changes; allow the scale to adjust to the new temperature
before use.
5) This scale is not waterproof or dustproof. Do not expose the scale to splashing water. Do not install the scale in an extremely humid or dusty environment.
6) Do not disassemble or modify the scale, you will void the warranty.
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CPS Series Operation Manual
I Name and Function of Parts
1 3 4
2
CPS-I
pcs
dwt
g
ozt
250 g
x
0.1 g 8.8 oz x 0.005 oz
1) Stable annunciator Indicates the displayed weight reading is stable.
2) LCD Display Displays measured weight, units, number of items counted and
status information.
3) Unit key Selects units of measurement displayed (g, oz, dwt or ozt). Press
and hold to enter calibration mode.
4) On/Off key Press to turn scale on or off.
5) Tare key Press to zero display. Press and hold to enter setup mode.
6) Count key Press to enter count mode and to select sample size (10 or 20).
Unit
Count Tare
On
Off
56
II Specifications
Weighing system: Strain-gauge load cell
Platform: 2.4” x 3.0” (60 x 75 mm), ABS polymer
Dimensions: 5.2” (D) x 3.2” (W) x 0.9” (H) (133 x 80 x 23 mm)
Weight display: Single face display
Type: 7 segment LCD
Characters: 0.5” (H) x 0.15” (W) (12.5 x 4 mm), 5 digits
Power supply: 2 AAA alkaline batteries
Battery life: 14 hours of continuous use
Operating temperature: 50°F to 95°F (10°C to 35°C)
Capacities and Divisions: 250.0 g x 0.1 g
8.800 oz x 0.005 oz
160.0 dwt x 0.1 dwt
8.000 ozt x 0.005 ozt
1
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CPS Series Operation Manual
III Setup
Installing the Battery
The CPS uses two standard AAA alkaline batteries. The battery compartment is located under the
scale towards the back of the scale. Press the cover in and out to open. Place the batteries into
the battery compartment making sure they are aligned correctly with the polarity markings inside the
compartment. Reversed polarity may damage the scale. Replace the compartment cover.
Setting the Scale Functions
The scale functions can be changed in the setup mode to select which units are displayed (g, oz, dwt
and ozt), to select whether or not the counts are displayed, to change the duration of the auto-off
function, to disable the auto-off function and to change the capacity of the scale when the load cell
and panel are changed.
Tare
To enter the setup mode, press the
key for about three seconds. The display will briefly show
“SET” followed by “UNIT”. Use the
Count
key as an ENTER or RETURN key, and use the
Unit
as a SELECT or TOGGLE key. Refer to the setup chart on the following page. Any unit that is
Unit
selected “ON” will be displayed, in sequence, when the
key is pressed. The auto-off setting
selects the duration, in seconds, after which the scale will automatically turn itself off if it is not being
used. If “OFF” is selected, the auto-off function will be disabled. The capacity setting should only
be changed if the load cell and front panel are being changed.
Calibrating the Scale
With the scale on a level and stable surface, power the scale on and, with nothing on the platform,
Unit
press the
scale will calibrate the zero load point. The display will then alternate “LoAd” and “100 g”. Place
100 g on the scale platform. After a few seconds, the scale will indicate “donE” and return to normal weighing mode. Remove the calibration weights from the scale platform and test the scale
calibration.
If the calibration is inaccurate, verify that the surface the scale is on is level, stable and free from
vibration. Recalibrate the scale. If the scale still will not read accurately, service may be required.
key for about three seconds. The display indicate “CAL” followed by “CAL 0”. The
key
2
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CPS Series Operation Manual
III Setup
Count
g
g
oz ozt
oz
dwt
g
Unit
Unit
Count
oz
Unit
Unit
Count
dwt
Unit
Unit
Unit Unit
Count
Tare
Press for three seconds.
Unit
Count
Unit
Count
g g
Unit
Unit
Count
Unit
Unit
Return to normal weighing mode.
Unit
dwt
Count
ozt
Unit
Unit
ozt
Count
Unit
Unit
Unit
Unit
3
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CPS Series Operation Manual
IV Directions for Use
Turning the Scale On and Off
Remove everything from the platform surface, and press the
full segment display. After approximately three seconds, the display will automatically set to zero.
On
Press the
after 2, 3, 4, or 5 minutes of non-use, even if the
key. The display will go off. The scale can be programmed to automatically shut off
Off
On
Off
“Setting the Scale Functions” to change this feature.
Low Battery Condition
The low battery indication will appear when the battery needs to be replaced. See section III, “Installing
the Battery” to replace the battery.
On
key. The display will briefly perform a
Off
key is not pressed. Please see section III,
Zero the Display
The scale will automatically zero when turned on. If a value is displayed when the platform is empty,
Tare
push the
key to zero the display. The maximum zero range is approximately the capacity of
the scale.
Changing Units of Measurement
To cycle through g, oz, dwt, ozt and counts, press the
that have been enabled in the scale set-up mode. Upon startup, the scale will default to the units
that were selected when the scale was last turned off.
Unit
key. The scale will only display the units
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CPS Series Operation Manual
IV Directions for Use
Gross Weighing
1) Begin with no load on the scale and the display reading zero.
2) Place the item(s) to weighed on the scale platform. The weight displayed will be the gross weight.
Net Weighing
1) Begin with no load on the scale and the display reading zero.
2) Place an empty container on the scale platform, wait for a stable weight indication, and press the
Tare
key. The weight of the container will be deducted automatically and the display will read zero.
3) Place the item(s) to be weighed in the container. The weight displayed will be the net weight. Do
not allow the gross weight on the scale platform to exceed the capacity of the scale.
4) To return to gross weighing mode, remove all items from the scale platform and press the
Tare
Batching
1) Begin with no load on the scale and the display reading zero.
2) Place an empty container on the scale platform, wait for a stable weight indication and press the
Tare
key. The weight of the container will be deducted automatically and the display will read zero.
3) Place the first item in the container until the desired weight is reached.
Tare
4) Press the
key and the display will return to zero. Place the next item in the container until the
desired weight is reached.
5) Continue in this manner until all items to be batched have been weighed. Do not allow the gross
weight on the scale platform to exceed the capacity of the scale.
6) To return to gross weighing mode, remove all items from the scale platform and press the
Tare
Counting
1) Begin with no load on the scale and the display reading zero.
2) If desired, place an empty container on the scale platform, wait for a stable weight indication and
Tare
press the
read zero.
3) Press the
more accurate results.
4) Place the number of samples chosen on the scale platform or in the tared container, and wait for
the scale to indicate 10 or 20 pieces.
5) Begin weighing groups of items to determine the number of items in the group. Do not allow the
gross weight on the scale platform to exceed the capacity of the scale.
6) To return to normal weighing mode, press the
key. The weight of the container will be deducted automatically and the display will
Count
key to select either a 10 or 20 piece sample. The 20 piece sample will usually give
Unit
key.
key.
key.
5
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CPS Series Operation Manual
V Troubleshooting and Error Messages
The scale can check various functions automatically. When a problem is detected, the following mes-
sages will be displayed. If you take the steps described below but the problem is not fixed, the scale
needs to be serviced by a qualified scale technician.
Low battery indication. Replace both batteries with new
ones. If the indication does not charge, see a qualified scale
technician.
Overload condition. Remove weight that is greater than the
scale capacity from the platform. If no weight is on the
platform, calibration or service is required.
Power on counts are too high. Remove weight from the
platform, turn the scale off and back on. If the error remains,
calibration or service is required.
Underload condition. Generally indicates that something is
wedged between the platform and scale body. Remove the
obstruction. If there is no obstruction, calibration or service is
required.
Power on counts are too low. This generally indicates that
the platform is not on the scale or that something is wedged
between the platform and the scale body. Replace the scale
platform, remove any obstructions under the platform, turn
the scale off and back on. If the error remains, calibration or
service is required.
EEPROM read/write error. Service is required.
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