ADDENDUM (GAC® 2500 UGMA/INTL)
Upper grain
hopper sensors
MAINTENANCE
This Addendum updates the Maintenance section of the GAC® 2500
(UGMA & INTL) operator’s manual (11001-1505F and all other preceding
manuals).
NOTE: For customers that require a
more extensive cleaning
procedure with debris buildup in
the cell, contact and schedule
your instrument for cleaning
with your dealer or authorized
service center.
IMPORTANT: It is highly recommended the unit be regularly inspected
and cleaned to ensure continued and consistent results.
For optimum performance, extensive cleaning should be performed
weekly or more often based on surrounding environment conditions.
Factors such as dust, temperature extremes, grain dust, and external
humidity vary from location to location. If there are any questions
about the cleanliness or instrument performance, contact your local
authorized service center.
Note: The following recommendations are provided as a guideline to
maintain a robust and quality operating instrument. It should not be
interpreted as an exhaustive maintenance program. Dust and debris may
periodically accumulate in areas not specified in this manual. The owner is
responsible for ensuring overall equipment cleanliness. If any questions
arise regarding the maintenance or performance of the instrument, contact
your dealer or local authorized service center.
EXTERNAL CLEANING
The LCD display may require periodic cleaning. Use a commercial cleaner
for glass lenses to remove dust.
Do not apply water, organic solvent or chemicals, such as acid
and alkali to the LCD display.
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
The GAC® 2500 surface can be cleaned with any cleaner designed for
plastic and stainless steel surfaces.
Periodically use a rag to wipe the grain hopper and the (2) upper grain
hopper sensors.
Figure 1
Grain Hopper Sensors
MAINTENANCE / 1
ADDENDUM (GAC® 2500 UGMA/INTL)
Instrument Information
S/N: 1807-00005
Software Versions:
IP Address: 169.254.0.37
Las t Serv ice: 1/1/2014
4.2.0.0, 2.4, 2.2
NTEP COC:
10-038
Model:
GAC2500
-
DICKEY-
john Cor poratio n
Analyze
Current User: Guest
SetupResults
Cleaning Cell
Setting Instrument to Cleaning Mode
Please wait...
GAC2500-UGMA
GAC2500-UGMA
GAC2500-UGMA
Directive No: 9180.61 05-01-13
INTERNAL CLEANING
Performing continuous tests can result in material accumulation around the
critical internal components and adversely affect the measurement.
Two types of cleaning are recommended on an as needed basis:
• Daily clean
• Extensive clean
DAILY CLEAN METHOD
A daily clean method allows cleaning the cell and door using an automated
process. During the cleaning sequence, the hopper door automatically
opens. Instruments with version 2.4 grain handler firmware, the trap door
opens automatically also.
To start the cleaning process:
1. At the Main Menu screen, press the Instrument Information button.
2. At the Instrument Information screen, press the Clean button.
– Pressing the Clean button automatically begins the cleaning
sequence and opens the hopper door and the trap door (version 2.4
grain handler firmware).
Figure 2
Daily Clean Method
2/MAINTENANCE
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
ADDENDUM (GAC® 2500 UGMA/INTL)
Clean Cell
Clean Cell
Ok
GAC2500-UGMA
Clean Cell and Press Ok when complete
Cleaning Cell-
Cleaning Cell
Returning System to Normal Operation
Please wait...
GAC2500-UGMA
3. Remove the grain drawer.
Figure 3
Remove Grain Drawer
4. Using the supplied brush, manually remove any loose or stuck grain or
dust from the measuring cell.
5. Press the OK button to return instrument to normal operation.
Hands should be clear from inside the instrument before pressing
the OK button.
Figure 4
Cleaning Sequence
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
6. Insert grain drawer.
MAINTENANCE / 3
ADDENDUM (GAC® 2500 UGMA/INTL)
EXTENSIVE CLEANING METHOD
NOTE: For customers that require a
more extensive cleaning
procedure with buildup in the
cell, contact and schedule your
instrument for cleaning with
your dealer or authorized
service center.
The daily cleaning method should be performed first before proceeding to
the extensive cleaning method.
IMPORTANT:
Extensive cleaning should be performed weekly or more often based
on surrounding environment conditions. Factors such as dust,
temperature extremes, grain dust, and external humidity vary from
location to location. If there are any questions about the cleanliness or
instrument performance, contact your local authorized service center.
Tools required for internal mechanism cleaning:
• Brush p/n 206410003 (included with instrument)
Extensive cleaning of the instrument involves two steps to ensure optimum
instrument performance:
1. Internal mechanism cleaning
2. Temperature sensor probe cleaning
To Clean the Instrument:
1. Power down the instrument.
Figure 5
Power Down
4/MAINTENANCE
2. Unplug power cord.
Figure 6
Unplug Power Cord
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
ADDENDUM (GAC® 2500 UGMA/INTL)
3. Remove other accessory cords (USB and printer).
Figure 7
Remove Accessory Cords
4. Remove grain drawer.
Figure 8
Remove Grain Drawer
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
5. Place the unit on its back side.
Figure 9
Place Unit on Back Side
MAINTENANCE / 5
ADDENDUM (GAC® 2500 UGMA/INTL)
6. Manually pull down on trap door.
Figure 10
Pull Down on Trap Door
7. Clean surfaces around measurement cell including hinge, trap door,
and edge of cell with the supplied brush.
Figure 11
Clean Surface Area Around Cell, Hinge, Trap Door, Edge of Cell
8. Close the trap door and clean hinge under trap door with brush.
Figure 12
Clean Under Trap Door
9. Proceed to instruction for cleaning the temperature sensor probe.
6/MAINTENANCE
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
ADDENDUM (GAC® 2500 UGMA/INTL)
CLEANING THE TEMPERATURE SENSOR PROBE
IMPORTANT: Any particles in front of the sensor’s optics can affect
measurement performance. Therefore it is crucial to
sufficiently clean the sensor. For excessive dust and/or
foreign material buildup on or around the temperature
sensor, it is recommended the instrument be returned to
DICKEY-john Service or authorized service center.
The temperature sensor may require cleaning due to dust buildup and/or
foreign material that has collected around the sensor that could potentially
cause temperature error readings during analysis. It is important the
temperature sensor is visually inspected and cleaned each time a regular
maintenance check of the instrument is conducted.
Tools required for cleaning the temperature sensor probe:
1. One of the below cotton swabs:
– Standard 6” long cotton swab (i.e. McMaster-Carr p/n 7074T12) for
flush sensor
– 6” long, tapered tip cotton swab (i.e. McMaster-Carr p/n 71035T54)
for embedded sensor
Figure 13
Recommended Cotton Swab for Flush Sensor
Figure 14
Recommended Cotton Swab for Embedded Sensor
2. 99% Isopropyl Alcohol
Figure 15
99% Isopropyl Alcohol
3. 10” flat head screw driver (only for instruments with flush sensor/brush
bracket)
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
Figure 16
10” Flat Head Screw Driver
MAINTENANCE / 7
ADDENDUM (GAC® 2500 UGMA/INTL)
Enlarged view of
ush sensor
OR
Enlarged view of
embedded sensor
[
Brush and
Bracket
Assembly
(ush sensor)
TEMPERATURE SENSOR TYPE
The GAC 2500 is equipped with one of two different sensor types. The
cleaning method is similar for both types however the cotton swab for
cleaning varies based on the sensor type.
• older instruments may include an embedded sensor on the circuit
board (recommended cotton swab McMaster-Carr p/n 71035T54)
• newer instruments include a flush sensor on the circuit board and a
brush bracket (recommended cotton swab McMaster-Carr p/n
7074T12 )
TEMPERATURE SENSOR LOCATION
With the instrument placed upside down and looking inside the instrument,
the sensor probe is located in the middle of the instrument toward the top
and front attached to a circuit board.
Figure 17
Sensor Probe Location
8/MAINTENANCE
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
ADDENDUM (GAC® 2500 UGMA/INTL)
To Clean the IR Temperature Sensor:
1. Gently place instrument upside down.
Figure 18
Place Instrument Upside Down
2. Visually inspect the IR temperature sensor to determine the type of
sensor installed.
3. For instruments with the flush sensor and brush bracket, the following
procedure can be utilized to remove particles from the brush. Carefully
place the head of the screw driver (10” length recommended) at the
bristles and use a sweeping side-to-side motion through the entire
length of the bristles no fewer than three times.
Figure 19
Cleaning the Brush Assembly
4. Select the appropriate cotton swab as described. Wet one end of the
cotton swab with 99% Isopropyl alcohol.
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
MAINTENANCE / 9
ADDENDUM (GAC® 2500 UGMA/INTL)
Flush sensorEmbedded sensor
Figure 20
Wet Swab with Alcohol
5. Swab method for cleaning sensor:
– For embedded sensors, the sensor is located inside the black tube.
Insert the swab inside the black tube and gently clean the IR
temperature sensor with the wet end of the cotton swab as depicted
in (Figure 21).
– For flush sensors, gently clean the entire IR temperature sensor
surface with the wet end of the cotton swab as depicted in
(Figure 21).
Figure 21
Magnified View of Proper Cleaning with Cotton Swab
10/MAINTENANCE
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
ADDENDUM (GAC® 2500 UGMA/INTL)
Funnel
Place Q-tip
on either side
of funnel
to reach
sensor
The IR temperature sensor can be cleaned with the Q-tip by placing the
Q-tip through the funnel or on the outside of the funnel as depicted in
(Figure 22).
Figure 22
Cleaning the Sensor with Cotton Swab
6. Allow the temperature sensor to dry for 90 seconds then gently clean
with the dry end of the cotton swab.
7. Visually inspect the temperature sensor as well as all other areas
cleaned to ensure the instrument is free from debris. If there is any
question about the cleanliness of the instrument, it should be returned
to a dealer or authorized service center.
8. If cleaning is acceptable, return instrument to upright position and
replace the drawer.
9. Reconnect power cable and accessory cords.
10. Power on instrument.
IMPORTANT: The foregoing recommendations are provided as a
guideline to maintain a robust and quality operating
GAC 2500. It should not be interpreted as an exhaustive
maintenance program. Dust and debris may periodically
accumulate in areas not specified in this manual. The
owner is responsible for ensuring overall equipment
cleanliness. If any questions arise regarding the
maintenance or performance of the instrument, contact
your dealer or local authorized service center.
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
MAINTENANCE / 11
ADDENDUM (GAC® 2500 UGMA/INTL)
12/MAINTENANCE
GAC® 2500 Models (UGMA & INTL)
11001-1646A-201409
Loading...