SCP SCIENCE DigiPREP User manual

Providing Innovative Solutions to Analytical Chemists
DigiPREP
KeyPad Controller
Se
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M
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www.scpscience.com

SCP SCIENCE
2KeyPad
Version 1.0
MANUFACTURED IN CANADA
Disclaimer: Products are supplied for laboratory use only and should not be used for any household, medical or therapeutic application. SCP SCIENCE presumes
that only trained and qualified individuals, familiar with procedures suitable for the safe operation of these instruments, will handle them. Our customers are solely
responsible for the safe operation, handling and use of these products.
CERTIFIED to comply with the following EMC and safety requirements standards:
EN 55022 (1998), EN 61000-4-3 (1996), ENV 50204 (1995), EN 61000-4-6 (1996), EN 61000-4-2 (1995), EN 61000-4-4 (1995), EN 61000-4-5 (1995),
and EN 61000-4-11 (1994). IEC 61010-1 and the IEC 61010-2-010, 2nd edition, 2001-02
Canada / International
21800, Avenue Clark-Graham,
Baie d’Urfé, QC H9X 4B6
Tel: [phone]
Fax: [phone]
USA
348 Route 11,
Champlain, NY
12919-4816
Tel: [phone]
Fax: [phone] (North America only)
Europe
12, Avenue du Québec, Bâtiment I-2, Silic 642
91965 Courtaboeuf CEDEX, France
Tel: [phone]
Fax: [phone]
China
C1102 Room, Chengming Building, No.2
Xizhimen Nandajie,
Xicheng District, Beijing, China 100025
Tel: [phone]
Fax: [phone]
Copyright by SCP SCIENCE
All Rights Reserved
This manual contains proprietary information, which shall not be reproduced or transferred to other documents
or disclosed to others without prior written permission from SCP SCIENCE.
Providing Innovative Solutions to Analytical Chemists
EU Users:
Contact your local
distributor for disposal
instructions.

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TABLE OF CONTENTS
INTRODUCTION.................................................................................................................................... 7
WARRANTY .......................................................................................................................................... 7
BASIC VERIFICATION LIST..................................................................................................................... 8
KEYPAD INSTRUCTION MANUAL
CAUTIONS, NOTES, SYMBOLS, SAFETY INFORMATION,WARRANTY ................................................. 10
COMPONENTS AND INSTRUMENT DESCRIPTION.............................................................................. 11
Unpacking ................................................................................................................................... 11
INSTRUMENT OPERATION.................................................................................................................. 12
KeyPad icons .............................................................................................................................. 12
SCREENS........................................................................................................................................... 13
Banner screen ............................................................................................................................. 13
Menu screen ............................................................................................................................... 13
Utilities screen.............................................................................................................................. 13
Language screen ......................................................................................................................... 13
System screen............................................................................................................................. 13
OPERATING PARAMETERS ................................................................................................................. 14
Run screen.................................................................................................................................. 14
Calibration screen ........................................................................................................................ 14
SAFETY MESSAGES........................................................................................................................... 15
Possible Safety Messages............................................................................................................ 15
Preventing Safety Messages ........................................................................................................ 16
Disabling Safety Messages........................................................................................................... 16
DigiPROBE ERROR MESSAGES........................................................................................................ 17
DIAGNOSTIC TEST PROCEDURE........................................................................................................ 17
CLEANING.......................................................................................................................................... 17
SPECIFICATIONS KEYPAD .................................................................................................................. 18
Electrical...................................................................................................................................... 18
Environmental .............................................................................................................................. 18
KEYPAD SERVICE MANUAL
KEYPAD GENERAL DESCRIPTION....................................................................................................... 20
LIGHT EMITTING DIODE & LCD ........................................................................................................... 21
KEYPAD MALFUNCTION ..................................................................................................................... 22
FAILED KEYPAD BUTTONS ................................................................................................................. 23
KEYPAD DIAGNOSTIC SECTION ......................................................................................................... 23
UIPS POWER SUPPLY SECTION ......................................................................................................... 24
HEATER DRIVE SECTION .................................................................................................................... 27
THE BLOCK IS NOT HEATING UP ....................................................................................................... 28

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A/D CONVERTER................................................................................................................................ 30
Possible A/D Problem .................................................................................................................. 31
RTD input connection................................................................................................................... 31
CPU SECTION .................................................................................................................................... 32
LCD display problem.................................................................................................................... 32
DigiPREP DIGESTION BLOCKS JR, MS, LS, HP INSTRUCTION MANUAL
INTRODUCTION.................................................................................................................................. 35
CAUTIONS AND NOTES ..................................................................................................................... 36
WARRANTY ........................................................................................................................................ 36
SYMBOLS .......................................................................................................................................... 36
OPERATIONAL PRECAUTIONS............................................................................................................ 37
SAFETY INFORMATION ....................................................................................................................... 37
INSTALLATION .................................................................................................................................... 38
Unpacking ................................................................................................................................... 38
SETTING UP ....................................................................................................................................... 38
OPERATION WITH PROBES............................................................................................................... 39
DigiPROBE ................................................................................................................................ 39
DigiSET...................................................................................................................................... 39
BLOCK DESCRIPTION ........................................................................................................................ 40
CLEANING.......................................................................................................................................... 41
Cleaning of Minor Surface Spills ................................................................................................... 41
Cleaning of Digestion Wells .......................................................................................................... 41
Cleaning Melted Plastic from Wells ............................................................................................... 41
Cleaning of a Major Spill ............................................................................................................... 41
SPECIFICATIONS ................................................................................................................................ 42
Environmental .............................................................................................................................. 42
Electrical...................................................................................................................................... 42
ACCESSORIES ................................................................................................................................... 43
OPTIONS............................................................................................................................................ 44
ELECTRICAL SCHEMATIC................................................................................................................... 45
DigiPREP HT INSTRUCTION MANUAL
INTRODUCTION.................................................................................................................................. 47
CAUTIONS AND NOTES ..................................................................................................................... 48
WARRANTY ........................................................................................................................................ 48
SYMBOLS .......................................................................................................................................... 48

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OPERATIONAL PRECAUTIONS............................................................................................................ 49
SAFETY INFORMATION ....................................................................................................................... 49
BLOCK DESCRIPTION ........................................................................................................................ 50
Unpacking ................................................................................................................................... 50
ASSEMBLY ......................................................................................................................................... 51
DUAL PROBE OPTION....................................................................................................................... 53
HEAT DEFLECTOR ASSEMBLY............................................................................................................ 54
REFERENCE DATA .............................................................................................................................. 55
TYPICAL HEATING RATES ................................................................................................................... 56
METHOD DEVELOPMENT FOR DIGESTING SAMPLES ........................................................................ 57
CLEANING.......................................................................................................................................... 58
Cleaning of Minor Surface Spills ................................................................................................... 58
Cleaning of Digestion Wells .......................................................................................................... 58
Cleaning of a Major Spill ............................................................................................................... 58
SPECIFICATIONS ................................................................................................................................ 59
Environmental .............................................................................................................................. 59
Electrical...................................................................................................................................... 59
ACCESORIES AND OPTIONS.............................................................................................................. 60
ELECTRICAL SCHEMATIC................................................................................................................... 61
JR, MS, HP, HT SERVICE MANUAL
DigiPREP JR BLOCK DESCRIPTION.................................................................................................. 62
DigiPREP JR Spare Part List....................................................................................................... 63
DigiPREP MS BLOCK DESCRIPTION ................................................................................................. 65
DigiPREP MS Spare Part List...................................................................................................... 66
DigiPREP HP BLOCK DESCRIPTION ................................................................................................. 67
DigiPREP HT BLOCK DESCRIPTION.................................................................................................. 69
DigiPREP HT Spare Part List ...................................................................................................... 70
DigiPREP LS BLOCK DESCRIPTION.................................................................................................. 71
MISCELLANEOUS PART LIST.............................................................................................................. 72
ELECTRICAL SCHEMATICS KEYPAD...................................................................................................73
DigiPREP DISMANTLING PROCEDURES ........................................................................................... 74
Removing the Corian Ring ............................................................................................................ 74
Removing the Graphite Block ....................................................................................................... 75
DigiPREP TESTS AND REPLACEMENT PROCEDURES ...................................................................... 75
Voltage Selector Switch, E239...................................................................................................... 75
Over-Temperature Protection Devices ...........................................................................................76

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Umbilical Cords..................................................................................................................... 77
Internal RTD, C176................................................................................................................ 78
Heating Pad Procedures .............................................................................................................. 78
Heating Pad Inspection Procedures .............................................................................................. 79
Heater Replacement Procedures .................................................................................................. 79
DigiPREP Dongle Testing Procedures.......................................................................................... 81
DigiPROBE Testing Procedures .................................................................................................. 81
DigiPREP TROUBLESHOOTING......................................................................................................... 81
DigiPROBE Error Displaying on Controller.................................................................................... 81
System Functional with Dongle but not with DigiPROBE............................................................... 81
Heater Does Not Heat Up, Temperature Displays but Does Not Change......................................... 81
Heater Cannot Achieve Desired Temperature, But ContinuouslyTries to Ramp ................................ 81
Heater Cannot Achieve Desired Temperature, Stops Heating Too Early .......................................... 82
Heater is Overshooting Temperature ............................................................................................. 82
Controller Temperature Fluctuates Between Impossible Values....................................................... 82
Controller Temperature Fluctuates Around Set Point....................................................................... 82
Breaker Switch On Controller Trips on the Start of Digestion........................................................... 82
ELECTRICAL SCHEMATICS............................................................................................................ 83-85
SERVICE DEPARTMENT INFORMATION............................................................................................... 88

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SCP SCIENCE 7
INTRODUCTION
This manual is to be used by distributors and
employees of SCP SCIENCE only. The DigiPREP
KeyPad Controller is used to control the DigiPREP
Digestion Systems (Jr, MS, LS, HP, HT).
WARRANTY
SCP SCIENCE warrants this product free from
defect in workmanship and materials for one (1)
year from date of purchase. SCP SCIENCE agrees
to make every effort to supply products in
merchantable condition and free from defects.
1. The warranty period for DigiPREP digestion
systems is 12 months from the date of shipment
from SCP SCIENCE.
2. DigiPROBE and DigiSET Probe are
consumable products and carry a warranty
only to the extent that they are functional on
receipt.
3. As part of the Agreement between SCP
SCIENCE and the Distributor, the distributor
agrees to assume the responsibility to provide
service for any DigiPREP digestion system sold
by the distributor in the territory.
a. Warranty Period: Service parts required
during the warranty period shall be provided
to the distributor at no charge. Freight costs for
the service parts shipped to the distributor
will be borne by SCP SCIENCE.
Transportation costs for returned instruments
and parts are the responsibility of the
distributor. Labour for repairs during the
warranty period or post warranty period
are the responsibility of the Distributor.
b. Alternative Service: In the event that the
distributor wishes SCP SCIENCE to perform
repair service on their behalf, the distributor
shall return the instrument prepaid to the
designated SCP SCIENCE Service Center.
Charges for labour required to complete the
repairs will be chargeable to the distributor
at SCP SCIENCE’s current rates. Parts
required in the post warranty period will be
charged according to the prevailing Service
Parts Price List less distributor’s discount.
Transport charges for the instrument to be
returned are the responsibility of the
distributor.
c. Post Warranty Period: SCP SCIENCE
agrees to supply required service parts at
prices according to the prevailing Service
Parts Price List less distributor’s discount.
The distributor agrees to pay freight charges
for service parts purchased after the warranty
period.
4. SCP SCIENCE reserves the right to request
that failed parts be returned to a location
specified by SCP SCIENCE, in which case freight
charges shall be borne by the distributor. This
clause shall apply irrespective of whether the
unit is under warranty or not.
5. A DigiPREP digestion system that does not
operate upon receipt (‘out-of-box failure’) may be
returned to SCP SCIENCE with transport charges
to the account of SCP SCIENCE. Note that the
distributor must obtain a Return Material
Authorization (RMA) number from SCP SCIENCE
before shipping the instrument. SCP SCIENCE
reserves the right to select the method of transport.
6. The distributor agrees to cooperate in all respects
with SCP SCIENCE and will provide SCP
SCIENCE with service failure information, serial
numbers of the digestion block and/or controller,
and any other service related information
determined by SCP SCIENCE as being relevant to
the repair of an instrument and to the improvement
of the product.
7. An RMA # is required prior to returning any item
to SCP SCIENCE.
8. SCP SCIENCE shall not be responsible for any
damage or losses however caused, which may
be experienced as a result of the installation or use
of this product.

SCP SCIENCE
8KeyPad
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BASIC VERIFICATION LIST
1. Visual and physical inspection
□All parts are included.
□Power cord is fully inserted
□All connectors and cables are inserted accordingly
□The system powers up correctly
□Cable connector looks fine (not bent)
Comments and observations:
___________________________________________
___________________________________________
___________________________________________
___________________________________________
___________________________________________
___________________________________________
2. Display
□Touch Screen and LCD Backlight are working
□Banner Screen is appearing
□Main menu screen is appearing
□Fonts and video color are correct
□The touch Screen is sensing finger pressing.
□The touch screen has been calibrated (from the
calibration screen)
Comments and observations:
___________________________________________
___________________________________________
___________________________________________
___________________________________________
___________________________________________
___________________________________________
3. Power Supply
□The Fuses are fine
□Power cables are correctly inserted (see page 26)
Comments and observations:
___________________________________________
___________________________________________
___________________________________________
___________________________________________
___________________________________________
___________________________________________
4. Heater Drive Circuit
□DigiPREP block is connected to the controller
□DigiPREP block is heating accordingly
□'COM2' dongle is correctly inserted and passes
ohmic check
□DigiPROBE is correctly inserted into its socket
(N/A for HT)
Comments and observations:
___________________________________________
___________________________________________
___________________________________________
___________________________________________
___________________________________________
___________________________________________

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SCP SCIENCE 9
5. CPU and general component verification
□Software runs accordingly
• Software version _________
□Fan is fixed accordingly
• Controller serial number _________
SYMPTOMS
The following symptoms must be verified before
going into more detail.
1. The block is over shooting the set point
temperature, and the temperature keeps
climbing;
• Check the Heater Drive Circuit
• Ensure correct block has been selected.
The voltage selector switch of the heating
block is in the correct position.
2. The block is not heating;
• Ensure the DigiSET dongle is installed.
• The power cable is connected.
• Ensure the Voltage Selector Switch of the
heating block is at the appropriate voltage.
• Verify that the 180oC NC Thermal Switch
is closed.
•Check resistance of heater according to
the DigiBLOCK size.
• Verify the 450oC Thermostat is closed for
HT.
3. The block is heating very slowly;
• Ensure that the voltage selector switch of
the heating block is at the correct position.
• Ensure correct block has been selected.
4. No display and no back light;
• Check fuse F1.
•
Check the 2 15A fuses inside the TS
housing.
Symptoms Reference
Operation LED not illuminated
when power is on
Page 26, 28,
36
Digital screen (LCD) is
malfunctioning Page 36
LCD shows "DigiPROBE
error" page 28
KeyPad buttons are not
functioning correctly Page 34, 78
The controller is not functioning
when power switch is on
Page 31
The DigiPREP block is not
heating up
The heating block is not
reaching its temperature or vary
FIGURE 1: SYMPTONS VS. DOCUMENT REFERENCES

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10 KeyPad
Version 1.0
Symbol Description Symbol Description
VVoltage lMains on
~Alternating current 0Mains off
ACurrent Attention, consult
accompanying documents
Hz Frequency Caution, hot surfaces
FFast-acting fuse Protective conductor terminal
CAUTIONS & NOTES
Cautions, warnings, and notes are
included throughout this manual.
CAUTION
A caution is used to emphasize
information pertaining to procedures
that, if not strictly followed, may result in
damage or destruction to the instrument
or improper instrument operation.
WARNING
A warning is used to emphasize
information about dangerous or
hazardous conditions relating to the
operation, cleaning, or maintenance
of the instrument that may result
in personal injury.
NOTE
A note is used to emphasize procedures
or conditions that may be misinterpreted
or overlooked, and to clarify potentially
confusing situations.
SAFETY INFORMATION
A minimum of safety considerations must be
followed when working with the DigiPREP system
in order to maintain good laboratory practice:
• Do not place DigiPREP controller in a fume
hood.
• Do not place the DigiPREP controller on a
surface containing flammable material.
• DigiPREP block should be operated in a fume
hood.
• DigiPREP controller must be plugged into a
three-prong grounded outlet.
WARRANTY
SCP SCIENCE warrants this product free
from defect in workmanship and materials
for one (1) year from date of purchase.
• Should the unit malfunction, call SCP
SCIENCE's service department (see page 88),
or your local distributor. and a service
representative will instruct you on how to
proceed.
• There are no user-serviceable parts in this unit.
The warranty is void if the unit shows evidence
of being tampered with, of being subjected to
excessive moisture, heat or corrosion, or of
other misuse.
• SCP SCIENCE shall not be responsible
for any damage or losses however caused
which may be experienced as a result of the
installation or use of this product.
• This product is not warranted for, nor has
it been tested for, use with perchloric
acid. The user accepts all responsibility if
this product is used with perchloric acid.
NOTE
CAUTION
WARNING

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SCP SCIENCE 11
UNPACKING
Retain all packing material in case
you need to return the instrument to
the manufacturer for service.
1. Verify that all components listed have been
included:
•DigiPREP keypad controller
• Power cord
• DigiSET dongle
COMPONENTS AND INSTRUMENT DESCRIPTION
Inspect the products for any shipping damage.
If the instrument has been damaged in shipping,
contact the freight carrier to report damage and to
file a damage report. Also contact the SCP
SCIENCE service department to report damage
and to request service information (see page 88 for
contact information).
If damage is noted, do not attempt
to operate the instrument.
1. Power light (LED)
2. LCD screen
3. KeyPad
4. Connection port for umbilical cord (to block)
5. Power cord receptacle
6. Power Switch
7. DigiSET connection port
8. Detachable Power Cord
NOTE
WARNING
1
2
3
5
P
ow
er
c
or
d
4
5
6
7
8

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KEYPAD ICONS
Alarm Key: Press to toggle audible alarm on/off. LED flashes when alarm is set to on.
Target Temperature Key: Press to modify target temperature.
Target time Key: Press to modify or reinstate target time.
Enter key: Press to accept value(s)
Left Arrow Key: Press to move the cursor to the left.
Right Arrow Key: Press to move the cursor to the right.
INSTRUMENT OPERATION
The keypad controller uses different screens to
access dfferent functions.
Use the arrow keys to move the cursor on the
screen, and press enter to accept your selection.
A "<" or ">" symbol displayed next to an item
indicates that the current screen contains more
items than can be shown. Use the arrow keys to
move to the next item.
The system powers up on the Banner Screen.

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SCREENS
BANNER SCREEN
The banner screen is displayed during power-up,
it will change to the menu screen after a short delay.
MENU SCREEN
From the menu screen, you can select either the
'OPERATION' screen or the 'UTILITIES' screen. From
the 'UTILITIES' screen you can change the language,
select the block model, and calibrate the system.
The 'OPERATION' screen lets you set the block tem-
perature and target time.
UTILITIES SCREEN
There are three options: LANGUAGE, SYSTEM,
and CALIBRATE.
The calibration screen will be
explained in the last point of this
section.
LANGUAGE SCREEN
The language screen lets you select the display
language.
Be careful not to select an unfamiliar
language as it may be difficult to
change back.
En- English
FR- French
DE- German
IT - Italian
ES- Spanish
NL - Dutch
JP- Japanese (romanized)
Next, select which DigiPREP system you are
using. Your selection determines the correct set
of PID values that the controller will use to ensure
precise control of the temperature of the block:
SYSTEM SCREEN
JR- DigiPREP JR. (24 position- ambient to 180oC)
MS- DigiPREP MS (48 position- ambient to 180oC)
LS- DigiPREPLS 72 position- ambient to 180oC)
HP- DigiPREP HP (hot plate- ambient to 180oC)
HT- DigiPREP HT (all HT models- ambient to
450oC)
The system will perform properly
only if the correct block is selected.
The selection you make will be stored in the
memory of the controller, so there is no need to visit
this screen every time you use the system.
LANGUAGE
EN FR DE IT ES NL >
LANGUAGE
<JP
SYSTEM
JR MS LS HP HT
SCP SCIENCE
DigiPREP KeyPad X.X
MENU
OPERATION UTILITIES
NOTE
UTILITIES
LANGUAGE SYSTEM
UTILITIES
< CALIBRATE
NOTE
NOTE

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OPERATION PARAMETERS
Return to the menu screen. Select OPERATION
and press enter.
The next screen will prompt you to enter the target
temperature:
Using the number keys, enter the desired operating
temperature. Press enter.
The next screen will prompt you to enter the target
time:
The target time is the duration for which you want
the system to hold the target temperature. If the
alarm is activated, it will also use this time. The alarm
will sound at the end of the time sequence. Enter
the desired target time (in minutes) using the number
keys and press enter to accept the selection.
From the next screen, you can choose whether or
not you want the heater to remain on at the end of
the target time.
Select OFF to turn the heater off at the end of the
target time, and ON if you want the block to remain
at the target temperature indefinitely. (Press enter to
accept the selection)
RUN SCREEN
Once you are finished entering the operation
parameters, the run screen will be displayed:
The run screen displays the current temperature
and time remaining. The temperature is displayed
to the nearest 0.1 of a degree, and the time is
displayed in minutes and seconds.
An asterisk will appear occasionally in the upper
right corner of the display. This indicates that the
heating element is firing.
If "AL" is displayed in the bottom right corner of the
screen, the alarm is set to sound when the remaining
time runs out. Pressing the alarm key will toggle the
alarm off. You can also use the alarm key to silence
the alarm.
To reset the timer, press the target time key to
return to the target time screen.
CALIBRATION SCREEN
Selecting CALIBRATE from the utilities screen will
bring you to the calibration screen, which is used to
enter calibration infromation for the DigiPROBE.
Calibration is done by comparing the keypad
display temperature to an NIST-calibrated (or similar)
thermometer. The difference between the reading
from the calibrated device and the keypad display
temperature will be entered into the system.
Not all thermometers have the same
response time.
Run the system using a DigiPROBE inserted
in a DigiTUBE filled with water. On the keypad,
press the target temperature key and set the target
CALIBRATION
#POINTS 0 (0-5)
MENU
OPERATION UTILITIES
TARGET TEMPERATURE?
25 TO 180oC XXX.X
TARGET TIME?
0 TO 999 XXX
END OF TIME?
HEATER OFF ON
TEMPERATURE 95.0oC
TIME 120:23 AL
NOTE

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SCP SCIENCE 15
temperature to the temperature you wish to use as
your setpoint.
Once the setpoint temperature is reached and
both the keypad value and the reference value (from
the calibrated thermometer) are stable, measure and
record the reference temperature and the keypad
display temperature. (Better accuracy is achieved if
the values are taken from the same tube at the same
time.) The difference between the two values will be
entered into the system. Calculate the input value as
follows:
T
reference - T keypad = input value
Repeat for up to five reference temperatures.
Next, re-access the calibration screen. (You may
have to turn off and back on to access the utilities
screen.) The calibration screen will prompt you to
enter the number of calibration point measured:
Using the number keys, enter a vlue between 0
and 5. (Choosing "0" will clear all calibration data
from the system.) Press enter. The number of points
you select will appear as the title of the next screen.
(This example will use a 1 calibration point.)
Using the numeric keypad, enter the first
calibration set point value ("SPT") and press enter.
Next, enter the calculated error ("DIFF"): for a positive
value, hold down the right-arrow key until the correct
value is reached. For a negative value, hold down
the left-arrow key until the correct value is reached.
Press enter to save the values and exit the screen.
To return to the factory calibration or
to clear all data from the keypad,
choose the number of calibration
points as "0" and press enter to
make the selection.
SAFETY MESSAGES
During operation, the keypad controller monitors
the system to detect potential problems.
If there is a problem, the alarm will sound and
the controller will display a safety message. The
controller will also suspend control of the block and
the block will begin to cool down. To resume control
of the block, press any key on the keypad.
The timer will continue to count
down during this time.
POSSIBLE SAFETY MESSAGES
Overtemp. Protection – Check Block Temp.
This message will be displayed if the block or
sample temperature overshoots the target
temperature significantly.
Possible Causes:
• Samples were placed in a block that is too hot.
Try allowing the block to cool to near-ambient
temperature before beginning the next
digestion.
• The voltage switch on the back of the block is
set to the wrong position.
• An exothermic reaction occured.
Temperature Dropping – Check DigiPROBE
This message will be displayed if the sample block
temperature is falling despite the controller attempt-
ing to heat it.
Possible Causes:
• The sample has evaporated.
• DigiPROBE is not submerged into the sample
sufficiently.
1 POINT
SPT 0.0 DIFF +0.0
CALIBRATION
#POINTS 0 (0-5)
NOTE
NOTE

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16 KeyPad
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• DigiPROBE is not in use but was not returned
to its well.
• An endothermic reaction occurred.
Check DigiPROBE or DigiSET Dongle
This message occurs when the temperature is not
changing and has not reached the set point.
Possible Causes:
• The DigiPROBE is not in the sample.
• The DigiSET dongle is not connected.
• The DigiSET PROBE is connected but not in
a sample.
Set point Exceeds Sample Boiling Point
These messages occur when the temperature
has not reached the target temperature for an
extended period of time.
Possible Causes:
• The target temperature entered is greater than
the boiling point of the sample.
• The rate of evaporation of the sample is too
high, causing evaporative cooling.
If you wish to boil your samples
at a high rate, control the block
temperature instead of the sample
temperature. Remove the
DigiPROBE and install the
DigiPROBE dongle.
Temperature Unsteady – Check DigiPROBE
This message occurs when the temperature
varies too quickly.
Possible Causes:
• The DigiPROBE is being moved in and out of
the sample repeatedly.
• The DigiPROBE is being moved in and out of
the holding well repeatedly.
• The sample has evaporated.
PREVENTING SAFETY MESSAGES
To avoid receiving safety messages, keep the
following tips in mind:
• When using the DigiPROBE, place the tip of the
PROBE about 1 mm from the bottom of the
digestion vessel.
• Use watch glasses whenever possible.
• Use DigiTUBE racks whenever possible, as
they will help insulate the block against
unnecessary heat loss.
• Ensure that all samples are positioned correctly
in the block before leaving the DigiPREP
unattended.
• Do not remove the rack while the DigiPROBE
is in the sample. Remove the PROBE first, then
the rack of samples.
• Return the DigiPROBE back to its storage well
when not in use.
DISABLING SAFETY MESSAGES
If you wish to operate the controller without
safety messages, you can disable them by
holding down the enter key while powering up
the controller. To re-enable the safety messages,
turn off the controller and then turn the power
back on. Some methodologies have not been
considered in creating safety messages, so it
may be necessary to suspend the safety messages.
NOTE

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SCP SCIENCE 17
Disabling the safety messages is
not recommended.
DigiPROBE ERROR MESSAGES
Error messages pertaining to the DigiPROBE are
displayed on the run screen in the Temp field. If the
field displays “ERROR” during a run, the system will
stop heating. Power down the controller, check the
connections, turn the power back on. (Remember
that if you are not using the DigiPROBE, the
DigiPROBE dongle must be connected.) If problem
persists, consult the service department (see page
85).
Disconnecting or reconnecting the
umbilical cable while the system is
turned on, especially while the run
screen is displayed, will likely result
in permanent damage to the
instrument.
DIAGNOSTICS TEST PROCEDURE
If you are having trouble with the DigiPREP
controller, follow the steps below and contact the
service department.
1. Shut off power to DigiPREP keypad.
2. Ensure that DigiPROBE is installed and
inserted into either the holding well or the
sample. If you are not using DigiPROBE,
ensure that the dongle is connected.
3. Ensure that the umbilical cable is connected
properly to the block and the controller.
4. Turn the power back on.
5. Is the blue LED light on? YES NO
6. Is the LCD backlight lit up? YES NO
7. If there is a problem with the LCD, describe
the appearance of the LCD after booting:
FAINT SQUARES BLANK
Please phone your SCP service department
(see page 85) and report this information
before returning the product. This will help our
technicians determine the cause of the malfunction
more quickly.
CLEANING
The keypad may be cleaned using a mild soap,
water, and a clean cloth. Ensure that the controller
is disconnected from the power supply. No organic
solvents should be used as it may destroy the finish
on the keypad mask. The system should not be
immersed in any liquid.
NOTE
NOTE

SCP SCIENCE
18 KeyPad
Version 1.0
RoHs
Toxic or hazardous substances and elements
Part name Lead
(Pb)
Mercury
(Hg)
Cadmium
(Cd)
Hexavalent
Chromium
(Cr6+)
Polybrominated
Biphenyle
(PBB)
Polybrominated
Diphenyl Ether
(PBDE)
Housing oo o o o o
Electronics oo o o o o
Display oo o o o o
Wiring Harness oo o o o o
Fasteners oo o o o o
O: Indicates that the toxic or hazardous substance
contained in all the homogenous materials for this
part, according to EIP-A, EIP-B, EIP-C, is below the
limit requirement in SJ/T11363-2006.
X: Indicates that the toxic or hazardous substance
contained in all the homogenous materials for this
part, according to EIP-A, EIP-B, EIP-C, is above the
limit requirement in SJ/T11363-2006.
ENVIRONMENTAL
Relative humidity 30% to 80%
Altitude Up to 2000m
Installation Category ll
Pollution Degree 2
Ambient operating
temp.
-5 °C to 40 °C
ELECTRICAL
Model Keypad
Voltage 115/230V ±10%
Amperage 13 A
Frequency 50/60 Hz
Maximum operating
temp. 85 °C
Line voltage fluctuations greater
than 10% will affect instrument
performance.
NOTE
SPECIFICATIONS DigiPREP KEYPAD

KeyPad
Version 1.0
SCP SCIENCE 19
Legend:
1. Rounded-Head Nylon Screw #6-32 x 1”
2. On/Off Switch
3. Dongle 2-Pin Female
4. Panel Lock Nut
5. Panel Mount Connector 7-Pin Male
6. Panel Mount Connector 2-Pin Male
7. Flat Head Nylon Screw #6-32 X 1 “
8. Voltage Selector Switch
9. Flat Washer, Nylon #6 Screw
10. LED
11. Nylon Nut #6-32
12. Stud #6-32
13. Brass Insert #6 Screw
14. LCD
15. Fish Paper
16. Nylon Stand-off #6-32 x ¼”
17. Bottom Kydex ¼”
18. Feet
19. Pan Phillips Head Tapping Screw #8 x ¾”

SCP SCIENCE
20 KeyPad
Version 1.0
CONTROLLER GENERAL DESCRIPTION
The following figure shows a general block diagram
of the KeyPad controller and all the interaction
between components. Each part will be explained
in details in a different section of the document.
The KeyPad controller system is composed of
a keypad to enter information regarding set point
temperature and controlling time to a CPU, which
controls the DigiPREP block (Jr, MS, LS, HP or HT).
FIGURE 5: GENERAL KEYPAD BLOCK DIAGRAM
Host CPU
Module
LCD Display
PC DTE (RS 232 COM)
Debug/Update
RTD Input
Circuit
A/D
UIPS
Module
Regulators and
Voltage Reference
Heater Drive
Module Heating
Block
Buzzer/
Alarm
(optional)
(100- 260Vac)
115/230 Vac +12Vdc +5V digital
+5V analog (AVCC)
RTD sensor
KEYPAD
Selector /
Signal_Out
Accessories Connector
(I/O, PWM and ADC)