Adam Equipment GK-Mplus User manual

©AdamEquipmentCompany2019
Adam Equipment
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GK-Mplus INDICATOR
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Softwarerevision:GK‐MplusV1.02
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©AdamEquipmentCompany2019
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Easy Reference:
Model name of the indicator:
Serial number of the unit:
Software revision number
(Displayed when power is first turned on):
Date of Purchase:
Name of the supplier and place:
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CONTENTS
PN 3.05.6.6.15666, Rev A, November 2019
1.0 INTRODUCTION ....................................................................................................... 3
2.0 SPECIFICATIONS ..................................................................................................... 4
3.0 INSTALLATION ......................................................................................................... 5
3.1 UNPACKING .......................................................................................................... 5
3.2 LOCATING ............................................................................................................. 5
4.0 CONNECTION ........................................................................................................... 6
5.0 KEYPAD AND DISPLAY ........................................................................................... 7
5.1 DISPLAY ................................................................................................................ 7
5.2 DISPLAY ................................................................................................................ 9
5.2.1 SYMBOLS AND INDICATORS ............................................................................ 9
6.0 CALIBRATION COUNTER FOR APPROVED INDICATORS ................................. 10
7.0 BATTERY ................................................................................................................ 11
8.0 BACKLIGHT ............................................................................................................ 11
9.0 AUTO POWER OFF ................................................................................................ 11
10.0 OPERATION ........................................................................................................ 12
10.1 ZEROING .......................................................................................................... 12
10.2 TARING ............................................................................................................. 12
10.2.1 MANUAL TARE .......................................................................................... 12
10.3 WEIGHING ........................................................................................................ 13
10.4 PARTS COUNTING .......................................................................................... 13
10.5 CHECK-WEIGHING .......................................................................................... 15
10.5.1 SETTING UP WHILE WEIGHING ............................................................... 1 6
10.5.2 SETTING UP WHILE PARTS COUNTING OR % WEIGHING ................... 16
10.6 LIMITS STORING AND RECALLING ............................................................... 17
10.7 PERCENT WEIGHING ...................................................................................... 18
10.8 ANIMAL (DYNAMIC) WEIGHING ..................................................................... 20
10.8.1 ANIMAL WEIGHING PROCEDURE ........................................................... 21
10.9 ACCUMULATED TOTAL .................................................................................. 21
10.9.1 MANUAL ACCUMULATION ....................................................................... 22
10.9.2 AUTOMATIC ACCUMULATION ................................................................. 23
11.0 RS-232 SPECIFICATION ..................................................................................... 24
11.1 INPUT COMMANDS FORMAT ......................................................................... 28
12.0 CALIBRATION ..................................................................................................... 29
13.0 PARAMETER SETTINGS .................................................................................... 30
13.1 CHECK WEIGHING PARAMETERS ................................................................ 30
13.2 RS-232 PARAMETERS .................................................................................... 32
13.3 INDICATOR PARAMETERS ............................................................................ 34
13.4 PERCENT WEIGHING AND ANIMAL WEIGHING ........................................... 35
14.0 ERROR MESSAGES ........................................................................................... 36
15.0 SERVICE PARAMETERS .................................................................................... 37
15.1 USING “0000” TO ENTER THE CALIBRATION PARAMETER ...................... 37
15.2 USING “2006” TO ENTER THE SERVICE PARAMETERS ............................. 38
15.2.1 F1 -CALIBRATION ...................................................................................... 39
15.2.2 F2–DECIMAL POINT POSITION ................................................................ 40
15.2.3 F3 – CAPACITY .......................................................................................... 40
15.2.4 F4 –INITIAL ZERO RANGE ........................................................................ 41
15.2.5 F5 -RE-ZERO RANGE ................................................................................ 41

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15.2.6 F6 -SUCCESSIVE TARE ............................................................................ 41
15.2.7 F7 –ADC COUNTS ..................................................................................... 41
15.2.8 F8 –ZERO MODE ....................................................................................... 42
15.2.9 F9 –FILTER SETTINGS ............................................................................. 42
15.2.10 F10 –CALIBRATION COUNT .................................................................. 42
15.2.11 F11 –SELECT APPROVALS STANDARD .............................................. 43
15.2.12 F12 –DEFAULT PARAMETERS TO FACTORY VALUES ...................... 43
16.0 REPLACEMENT PARTS AND ACCESSORIES .................................................. 44
17.0 SERVICE INFORMATION .................................................................................... 45
APPENDIX ........................................................................................................................ 47
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1.0 INTRODUCTION
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 The GK-Mplus indicator provides an accurate, fast and versatile general
purpose indicator with parts counting, percent weighing and check-weighing
functions.
 The GK-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 GK-Mplus is supplied with a RS-232 bi-directional interface and real time
clock (RTC).
 The GK-Mplus 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, GK-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
INPUT SECTION
Load Cells Sin
g
le loadcell maximum 500 ohms
Connection 6 wires
2 excitation, 2 sense, 2 si
g
nal
Excitation 5Vdc
Sensitivit
y
1.00uv/e
Linearit
y
0.01% FS
Zero Ran
g
e 0-10mv
Si
g
nal ran
g
e 0-39mv
A
DC Sensitivit
y
A
pproximatel
y
0.002 µv/ADC count
DIGITAL SECTION
Maximum Ran
g
e T
y
picall
y
1k
g
–
30000k
g
Divisions Up to 6,000
Wei
g
h units k
g
/
g
Stabilisation
Time
2 Seconds typical
Operating
Temperature
-10°C - 40°C
14°F - 104°F
Power suppl
y
110V - 240 VAC 50/60 Hz
Batter
y
Internal rechar
g
eable batter
y
Calibration Manual External
Display 6 digits LCD digital displays
with capacit
y
tracker and s
y
mbols for units
Indicator Housing ABS Plastic
Overall
Dimensions
(
WxDxH
)
260 x 170 x 115mm
10.2” x 6.7” x 4.5”
Net Weight 2 kg / 4 lb
Applications Weighing and check weighing
Functions Weighing, Check Weighing, Parts counting, Check Counting, Animal
Wei
g
hin
g
, Accumulatin
g
memor
y
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
This indicator must be connected to a load cell platform and calibrated as necessary to
match the platform and user requirements. See Section 15 for set-up information.
The user’s application and the technical specifications of the platform or load cell will
determine the necessary configuration.
3.2 LOCATING
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 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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4.0 CONNECTION
This indicator must be connected to a load cell platform and calibrated as necessary to
match the platform and user requirements.
The GK has a connector configured for a 6 wire load cell. Connect the load cell/platform to
the indicator as shown below. The cable length should be as short as possible, using a
large size wire to minimise errors due to resistance in the leads.
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GK-Mplus model must use the 6 wire connection and has certain limitations for wire size
and length. Refer to the Approval Test Certificate for details.

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Figure 1A shows the connections to a 6 wire load cell. Figure 1B shows a preferred
method to attach a 4 wire load cell, using a 6 conductor cable to go from the indicator to
the platform or load cell where it connects to the 4 wires from the load cells. The
Excitation and sense wires are connected together near the load cell.
For less exacting applications you can connect the excitation to the sense at the
connector.
5.0 KEYPAD AND DISPLAY
5.1 DISPLAY
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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 indicator 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
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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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5.2 DISPLAY
5.2.1 SYMBOLS AND INDICATORS
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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 pan
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
Above the high limit Red
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6.0 CALIBRATION COUNTER FOR APPROVED INDICATORS
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With approved GK-Mplus indicators we 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 code should be apparent and recorded in a suitable location on the indicator.
In this way, if the record of the Calibration or Parameter counters do not agree with
recorded settings the responsible person inspecting the indicator 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.
If during the time the counting displays are shown, the user presses the [Tare] key, the
user will be given a message to enter the passcode necessary to calibrate the indicator, “P
- - - - “ Enter the code “P0000” to Enter calibration or “P1000” to enter the parameters,
followed by pressing the [Tare] key.
The Calibration access will allow user calibration (See section 15.1) and the parameter
code will allow access to the following parameters. (See section 15.2).
“F4Int” InitialZeroRange
“F5rEZ” Re‐Zerorange
“F6SCS”    SuccessiveTareEnable
“F7Cnt”DisplayADCcounts
“F8Zem” ZeroMode
“F9FL”FilterSettings
“F10Cn”Calibrationprotection
Other parameters must be changed using the service parameters as described in section
15.2

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7.0 BATTERY
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 The indicators 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 .
8.0 BACKLIGHT
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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
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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.
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10.0 OPERATION
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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 indicator has an automatic re-zeroing function to account for minor drifting or
accumulation of material on a connected platform. However you may need to press
[Zero] to re-zero the indicator if small amount of weight is still shown when the
platform is empty.
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10.2 TARING
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10.2.1 Manual tare
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 Zero the indicator by pressing [Zero]. The zero indicator will be on. Place a container
on the pan 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 indicator
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.

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NOTE:
When the container is removed a negative value will be shown. If the indicator 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.
If the value to be tared is very large the scale may not allow you to tare the value as the
negative value will not fit on the display area. In this case the scale will beep twice when
the [Tare] key is pressed and then return to normal weighing without setting tare.
Press [Tare] or [Zero] to remove the tare value and display zero. The Net indicator will
disappear.
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
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The indicator 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”.

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 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.
 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 indicator.
 After the sample has been weighed the indicator 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.
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 To return to weighing, press [Unit] when “XXpcs”is displayed.
10.5 CHECK-WEIGHING
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Check-weighing is a procedure to display a visual indication 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.

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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.
10.5.1 Setting up while weighing
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 Press the [Low Limit] key. It will show the current low limit. The text“LO”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.
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 To set the high limit press [High Limit], the display will show the high limit, the text
“HI” 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 indicator to weighing, with
the Check-weighing function enabled.
10.5.2 Setting up while parts counting or % weighing
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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.
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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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
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The indicator 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 and bar graph
are stored. The indicator will continue to work
with the current settings as active.

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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 indicator will
change to the recalled limits, weighing units and
settings for the beeper and bar graph.
NOTE:
1. If the recalled limit is for parts counting, the display will show the last sample value
used, ready for a new sample to be counted
2. If the recalled unit is a percent weighing limit, the display will show the last sample
value used, ready for a new sample to be weighed.
3. If the memory location was empty the indicator will return to weighing
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10.7 PERCENT WEIGHING
The indicator can be set to perform percent weighing. See Section 13.1.
The indicator will use a mass on the platform as the 100% reference weight. If the platform
is empty (or the indicator is tared) then the user can input a reference weight using the
keypad.
 If using a reference weight (or object) as your 100% reference, add the weight to
the platform.
 Press [Func]. The first option is“FUnC 1”, press the [Func] key 3 more times to
display “FUnC4”.
 Press the [Tare] key.“P1PCt”will be displayed.