Adam GBK Mplus Series User manual

Adam Equipment
GBK Mplus / GFK Mplus Series

Easy Reference:
Model name of the scale:
Serial number of the unit:
Software revision number
(Displayed when power is first turned on):
Date of Purchase:
Name of the supplier and place:

© Adam Equipment Company 2020 4
CONTENTS
P.N. 3.05.6.6.15667, Rev A, January 2020
1.0 INTRODUCTION................................................................................... 5
2.0 SPECIFICATIONS................................................................................ 6
3.0 INSTALLATION.................................................................................... 8
3.1 UNPACKING..........................................................................................................8
3.2 LOCATING.............................................................................................................8
3.3 SETTING UP THE SCALES ..................................................................................9
4.0 KEYPAD............................................................................................. 10
5.0 DISPLAY............................................................................................. 12
5.1 SYMBOLS AND INDICATORS............................................................................12
6.0 CALIBRATION COUNTER FOR APPROVED SCALES .................... 13
7.0 BATTERY........................................................................................... 13
8.0 BACKLIGHT....................................................................................... 14
9.0 AUTO POWER OFF ........................................................................... 14
10.0 OPERATION.................................................................................... 14
10.1 ZEROING..........................................................................................................14
10.2 TARING.............................................................................................................15
10.2.1 MANUAL TARE..........................................................................................15
10.3 WEIGHING........................................................................................................16
10.4 PARTS COUNTING..........................................................................................16
10.5 CHECK-WEIGHING..........................................................................................18
10.5.1 SETTING UP WHILE WEIGHING ..............................................................19
10.5.2 SETTING UP WHILE PARTS COUNTING OR % WEIGHING...................19
10.6 LIMITS STORING AND RECALLING...............................................................20
10.7 PERCENT WEIGHING......................................................................................21
10.8.1 ANIMAL WEIGHING PROCEDURE...........................................................24
10.9 ACCUMULATED TOTAL..................................................................................24
10.9.1 MANUAL ACCUMULATION......................................................................25
10.9.2 AUTOMATIC ACCUMULATION................................................................26
11.0 RS-232 SPECIFICATION................................................................. 27
11.1 INPUT COMMANDS FORMAT.........................................................................31
12.0 CALIBRATION................................................................................. 31
13.0 PARAMETER SETTINGS................................................................ 32
13.1 CHECK WEIGHING PARAMETERS................................................................32
13.2 RS-232 PARAMETERS....................................................................................34
13.3 SCALE PARAMETERS....................................................................................36
13.4 PERCENT WEIGHING AND ANIMAL WEIGHING...........................................37
14.0 ERROR MESSAGES ....................................................................... 38
15.0 REPLACEMENT PARTS AND ACCESSORIES.............................. 39
16.0 SERVICE INFORMATION................................................................ 40
17.0 WARRANTY INFORMATION........................................................... 41
18.0 APPENDIX....................................................................................... 42

© Adam Equipment Company 2020 5
1.0 INTRODUCTION
•The GBK/GFK-Mplus scales provides an accurate, fast and versatile
general purpose weighing scales with parts counting, percent weighing and
check-weighing functions.
•The GBK/GFK-Mplus has colour changing LCD illumination to indicate when
a weight is below the low limit, between the limits or above the high limit next
to the display. These can work in conjunction with an audible alarm for
check weighing.
•The GBK/GFK-Mplus scales are supplied with a RS-232 bi-directional
interface and real time clock (RTC).
•The GBK/GFK has a sealed keypad with colour coded buttons and a large
easy to read liquid crystal type display (LCD) supplied with a multicolour
illumination.
•Includes automatic zero tracking, semi-automatic tare and accumulation
facility that allows the weight to be stored and recalled as an accumulated
total.
•OIML Approved models, GBK/GFK-Mplus, only allow “Kg” and “g” as units,
have calibration controlled by jumpers or passcodes and other limitations as
noted in the manual.

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2.0 SPECIFICATIONS
GBK-Mplus Models
Model # GBK 6Mplus
GBK 15Mplus GBK 30Mplus GBK 60Mplus GBK 150Mplus
Maximum Capacity 6kg 5kg 30kg 60kg 150kg
Readability 2g 5g 10g 20g 50g
Repeatability (Std
Dev) 4g 10g 20g 40g 100g
Linearity + 4g 10g 20g 40g 100g
Units of Measure Kilograms, grams
Stabilization Time 2 Seconds typical
Operating
Temperature -10°C to +40°C / +14°F to +104°F
Power Supply 110V - 240 VAC 50/60 Hz
Calibration External
Display 6 digits LCD digital displays with capacity tracker and symbols for units
Pan Size 300mm x 400mm x 50mm / 11.8” x 15.5” x 2”
Overall Dimensions
(w x d x h) 300mm x 520mm x 660mm / 11.8” x 20.5” x 26”
Net Weight 7.4kg
Features Weighing, Check Weighing, Parts counting, Check Counting, Animal Weighing,
Accumulating memory
Interface RS-232 bi-directional interface
English, German, French, Spanish, Italian and Portuguese selectable text

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FK-M Models
Model # GFK 60Mplus GFK 150Mplus GFK 300Mplus
Maximum Capacity 60kg 150kg 300kg
Readability 20g 50g 100g
Repeatability (Std Dev) 40g 100g 200g
Linearity + 40g 100g 200g
Units of Measure Kilograms, grams
Stabilization Time 2 second typical
Operating
Temperature -10°C to +40°C / +14°F to +104°F
Power Supply 110V - 240 VAC 50/60 Hz
Calibration External
Display 6 digits LCD digital displays with capacity tracker and symbols for units
Pan Size 400mm x 500mm
Overall Dimensions
(w x d x h) 400 mm x 620 mm x 860 mm
Net Weight 12.5kg
Features Weighing, Check Weighing, Parts counting, Check Counting, Animal
Weighing, Accumulating memory
Interface RS-232 bi-directional interface
English, German, French, Spanish, Italian and Portuguese selectable
text

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3.0 INSTALLATION
3.1 UNPACKING
The GBK/GFK-Mplus scales have already been adjusted to work with a platform and
have been configured for this application. The platform and indicator have been calibrated
as a pair and must be used together.
3.2 LOCATING
•The scales should not be placed in a location that
will reduce the accuracy.
•Avoid extremes of temperature. Do not place in
direct sunlight or near air conditioning vents.
•Avoid unsuitable tables. The table or floor must be
rigid and not vibrate.
•Avoid unstable power sources. Do not use near
large users of electricity such as welding equipment
or large motors.
•Do not place near vibrating machinery.
•Avoid high humidity that might cause condensation.
Avoid direct contact with water. Do not spray or
immerse the scales in water.
•Avoid air movement such as from fans or opening
doors. Do not place near open windows or air-
conditioning vents.
•Keep the scales clean. Do not stack material on the
scales when they are not in use.

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3.3 SETTING UP THE SCALES
•The pillar is attached to the base using a bracket that must be attached to the base
frame first using the 4 bolts supplied. The pillar is secured to the bracket using 2
sets of screws. The cable from the base to the indicator module is run through the
tube and taken out through the plastic support at the top. Excess cable can be
stored within the tube.
•The GBK/GFK-Mplus series comes with a stainless steel platform packed
separately. Place the platform in the base.
•Level the scale by adjusting the four feet. If the scale rocks re-adjust the feet.
•Attach the indicator module to the pillar by sliding it over the bracket with the
flanges engaged in the groves on the base. Attach the cable from the base to the
connector on the rear of the indicator.
•Attach the power to the indicator. Press the [On/Off] key. The software revision
number will be displayed followed by a self-test showing all digits before the zero is
displayed along with the unit of weight that was selected last.
•If the scale is an approved version, GBK/GFK-Mplus, and the Calibration Counter
has been enabled (see section 6) the current values will be displayed. These
values should match the values marked on the scale at the time of verification, if it
has been verified.

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4.0 KEYPAD
KEYS PRIMARY FUNCTION SECONDARY FUNCTION
[Zero] Sets the zero point for all subsequent
weighing. The display shows zero.
Escape from any setting menus
[Tare] It tares the scale and stores the current
weight in memory as a tare value,
subtracts the tare value from the weight
and shows the results. This is the net
weight.
Accept the set values
[Unit] This is used to select the weighing units
from a preset list of available units.
Allows the weight, unit weight,
and count to be seen when
parts counting or to change from
weight to % in percent weighing
[Low
Limit]
&
[High
Limit]
It sets the limits for check weighing and
allows setting of either the low limit or
the high limit or both.
None

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[Low
Limit]
&
[High
Limit]
It sets the limits for check weighing and
allows setting of either the low limit or
the high limit or both.
None
[Lim] It stores and recalls any of 10 preset
limits None
[Func] This is used to select percent weighing,
RS-232 parameters, Operation of the
bar graph, RTC settings, User ID and
Scale ID.
None
[Cnt] Enter Parts Counting None.
[Print] It is used to print the results to a PC or
printer using the RS-232 interface. It
also adds the value to the accumulation
memory if the accumulation function is
not automatic.
None
[1] to [0]
and [CE]
Allow entering numerical values where
required, setting of limits, tare value,
time and date for example.

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5.0 DISPLAY
5.1 SYMBOLS AND INDICATORS
The LCD has unique symbols to indicate the following:
0
The display is at Zero
The scale is Stable
Net
Net weight- The scale has been tared
kg /g
Symbols shown for the units
Capacity Tracker- A bar graph indicating the proportion of
the scale capacity being used by the weight on the
platform
Battery status
%
The scale is in Percent weighing mode
pcs The scale is in Parts counting mode
When in Check Weighing mode, the LCD backlight colour will change to help identify when
the weight is below, within or over the limits.
Weight LCD colour
below the low limit Amber
Within the limits Green

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6.0 CALIBRATION COUNTER FOR APPROVED SCALES
The approved (GBK/GFK-Mplus model) scales have the ability to control access to the
calibration or metrology parameters using a passcode to limit access. The requirements
for doing this stipulate the counters should be apparent and recorded in a suitable location
on the scale.
In this way if the record of the Calibration or Parameter counters do not agree with
recorded settings the responsible person inspecting the scale can take appropriate action.
The Counters are incremented any time the calibration section or the Factory parameters
section have been modified.
At power on, the display will show the current software revision number followed by the
message of the Calibration Count “ [AL[nt” then a number i.e. “123”. The number from the
counter memory. Then the Parameter Counter message of “ PAr[nt ” and probably a
different number, i.e. “234”. The counters cannot be reset to 0, they will increment until the
display can no longer hold the values. (1 to 999999). It is expected we will never have
more than 1 million calibrations in the life of the machine.
Each display is held for 1-2 seconds.
The indicator will then continue to do the display test and go to normal weighing.
7.0 BATTERY
•The scales can be operated from the rechargeable battery, if desired. The battery
life is determined by the number and impendence of the load cells connected. With
a single load cell and backlight disabled the life is approximately 70 hours before
needing to be recharged.
•When the battery needs charging, the battery symbol will show as empty and it
will flash. If the battery symbol is flashing, the indicator will still operate for a period
of time, after which, it will automatically switch off, to protect the battery.
•To charge the battery, simply plug in the mains power supply. The indicator does
not need to be turned on.
•The battery symbol will scroll to indicate it is charging, it may take several hours to
fully charge the battery from empty.
•When the battery is charged to full capacity, the battery symbol will stop scrolling
and it will show as fully charged .

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8.0 BACKLIGHT
• The backlight for the LCD can be set by the user to always off, always on or
automatic (on only when the indicator is in use or a key is pressed). See setting of
the parameter “ S2 bL ” in section 13.3.
•The default backlight colour can be defined to White, Green, Red, Amber and Blue.
Once defined to one of these colours, the backlight will still change colours during
Check Weighing, and Check Counting, on all other situations it will illuminate
according to the user selection. See setting of the parameter “ S2 bL ” in section 13.3.
• The intensity of the backlight can also be defined, there are three settings to choose
from, Low, Mid and High
9.0 AUTO POWER OFF
The auto power off can be set by the user to disable the feature or to a pre-set time
interval. See setting of the parameter “S3 AoF“ in section 13.3.
10.0 OPERATION
10.1 ZEROING
•You can press the [Zero] key at any time to set the zero point from which all other
weighing and counting is measured. This will usually be necessary when the
platform is empty. When the zero point is obtained the display will show the zero
indicator.
•The scale has an automatic re-zeroing function to account for minor drifting or
accumulation of material on the platform. However, you may need to press [Zero]
to re-zero the scale if small amount of weight is still shown when the platform is
empty.

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10.2 TARING
10.2.1Manual tare
•Zero the scale by pressing [Zero]. The zero indicator will be on. Place a container
on the platform and its weight will be displayed.
•Press [Tare] when the reading is stable. The weight that was displayed is stored as
the tare value and it is subtracted from the display, leaving zero on the display. The
stable and Net indicator will be on.
•As a product is added only the weight of the product will be shown. The scale could
be tared a second time if another type of product was to be added to the first one.
Again only the weight that is added after taring will be displayed.
NOTE:
When the container is removed a negative value will be shown. If the scale was tared just
before removing the container, this value is the gross weight of the container plus all
products which were removed. The zero indicator will also be on as the platform is back to
the same condition it was when [Zero] was pressed last.
Press [Tare] or [Zero] to remove the tare value and display zero. The Net indicator will
disappear.

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10.3 WEIGHING
To determine the weight of a sample, first tare an empty container if used, then
place the sample in the container. The display will show the weight and the unit of
weight currently in use.
To change the weighing unit press the [Unit] key. The only alternative weighing unit
is grams. This can be enabled by the user in the parameters section. See section
13.3.
10.4 PARTS COUNTING
The scale can be used to count parts based on the average weight of a sample
weighed. When more parts are added the total number of parts are displayed.
•If a container is to be used, place this container on the platform before
entering parts counting and press [Tare].
•Press [Cnt] to enter the Parts Counting mode. The display will show the last
sample size used. For example, “10 Pcs”.
•Either place 10 parts on the platform for determining the average piece weight
or use a different number of parts. For example, place 20 parts on the
platform, press [CE] to clear the last values and then enter the value 20 using
the numeric keypad.

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•Press [Cnt] to weigh the samples and determine an average piece weight.
•If the parts are too light to measure accurately, the count may become inaccurate. It
is suggested that the samples to be weighed should each weigh more than the
resolution of the scale.
•After the sample has been weighed the scale will count any other parts added by
applying the average piece weight to the weight of the parts to be counted.
•The [Tare] key works normally during this time, so it is possible to tare the display
with a container on the platform
•During parts counting the display can be changed to show the net weight, unit
weight and number of parts by each time pressing the [Func] key.

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•To count a different sample quantity, press the [Cnt] key. The display will
show the last used sample size. Either use this sample size with a different
part or enter a new sample size as above.
•To return to weighing, press [Unit] when “XX pcs”is displayed.
10.5 CHECK-WEIGHING
Check-weighing is a procedure to display an indicator or sound an alarm when the weight
on the platform meets or exceeds the values stored in the memory. The memory holds
values for a high limit and a low limit. Either or both the limits can be set by the user.
NOTE:
1. The alarm can be set to OFF (See section 13.1). The LCD display will indicate
whenever the weight is within or exceeds the limits by changing the LCD
illumination to Amber, Green or Red.
2 The limits can be locked by the manager. A Limit Password must be used to
change the limits or recall other limits from memory.
3. If Limit Password is enabled then enter the password which will allow you to
change the limits or the operation of the beeper.
Red Mass on the platform is above the high limit
Green Mass is between the limits
Amber Mass is below the low limit

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10.5.1 SETTING UP WHILE WEIGHING
•Press the [Low Limit] key. It will show the current low limit. The “LO” symbol will
appear on the display.
•Press the [CE] key to clear the old value and then enter the new low limit using the
numeric keys. The decimal point is fixed at the position that is used for the current
weighing unit. When the desired value is shown press [Tare] to accept the value. If
you want to reset the value to zero, press [CE] to clear the value.
•The limits are displayed in the weighing unit in use.
•To set the high limit press [High Limit], the display will show the high limit, the “HI”
symbol will be on to the left side of the display. Set the high limit in the same way
the low limit was set.
•Pressing the [Tare] key to enter the value will return the scale to weighing, with the
Check-weighing function enabled.
10.5.2 SETTING UP WHILE PARTS COUNTING OR % WEIGHING
During parts counting and percent weighing the limits are set in the same way as above.
The limits are displayed in pcs or %.
See Section 10.4 for the description of parts counting and Section 10.7 for percent
weighing.
NOTE:
1. The weight must be greater than 20 scale divisions for the check-weighing to
operate.
2. To disable the check weighing function, enter zero into both the limits as described
above. When the current limits are shown, press [CE] to clear the settings, then
press [Tare] to store the zero values.

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10.6 LIMITS STORING AND RECALLING
The scale can store up to 10 sets of high and low limits in memory along with the weighing
units in use (including pcs for parts counting and %for percent weighing) as well as
settings for the beeper.
During Check weighing the current limits can be stored or previously stored units can be
recalled
Press the [Lim] key. If you are already in the
check weighing mode the display will ask if you
wish to store the current limits by showing
“StOrE” or recall another set of limits by showing
“rECALL”. The [Lim] key can be used to toggle
between “StOrE” and “rECALL”.
If you want to store the limits, when “StOrE” is
displayed press the [Tare] key. The display
shows “St ”. Enter a number corresponding to
the desired memory location (0 to 9). “St X” will
be displayed for 2 seconds indicating the
location X where the current limits, weighing
units and settings for the beeper bar graph are
stored. The scale will continue to work with the
current settings as active.
If you wish to recall any of the pre-stored limits,
press [Tare] when “rECALL” is displayed. The
display shows “rEC ”. Enter the number
corresponding to the desired memory location (0
to 9) to be recalled. “rEC X” will be displayed for 2
seconds indicating the values stored in the
location “X” is being recalled. The scale will
change to the recalled limits, weighing units and
settings for the beeper bar graph.