SCP SCIENCE DigiPREP Series User manual

KeyPad service manual
Rev.1.1
1
Copyright 2003 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.
Patents Pending
SCP SCIENCE
Canada: 21800 Ave. Clark Graham, Baie d’Urfé, QC H9X 4B6
Tel: [phone] Fax: [phone]
USA: 348 Route 11, Champlain, N.Y. 12919-4816
Tel: [phone] Fax: [phone]
Europe: 12 Avenue du Québec, Batiment I 2 Silic 642
91965 Courtaboeuf CEDEX (France)
Tel: [phone] Fax: [phone]
www.scpscience.com
[email protected]
MANUFACTURED IN CANADA
CERTIFIED TO
CSA 1010 .1
UL 3101-1
IEC 1010-1

KeyPad service manual
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TABLE OF CONTENTS
1.Introduction
Warranty.................................................................................................4
1.1 Error Messages ................................................................................5
1.2 Basic verification list .........................................................................6
1.3 Symptoms.........................................................................................8
1.4 DigiPREP KeyPad Automatic Diagnostics Test Procedure ..............9
1.5 Controller Physical Description.......................................................10
1.6 Instrument Operation......................................................................11
1.6.1 Set-Up Menu................................................................................11
1.6.2 Language Selection.....................................................................12
1.6.3 Set-Up Menu................................................................................12
1.6.4 Setting Operating Temperature ...................................................12
1.6.5 Setting the Timer .........................................................................13
1.6.6 Programming Heater Shut Down.................................................13
1.6.7 Alarm Mode .................................................................................13
1.7 Controller General Description........................................................16
2.Light Emitting Diode (LED) & LCD
2.1 Operation LED not illuminated (blue) when power is on.................17
2.2 Digital screen Backlight is not working............................................18
2.3 Digital Screen (LCD) is malfunctioning...........................................19
3.KeyPad Malfunction
3.1 Failed KeyPad Buttons ..................................................................20
3.2 KeyPad Diagnostic Section ...........................................................21
3.2.1 Entire row or column problem......................................................21
3.2.2 Specific Button Problem ..............................................................22
4.Power Section
4.1 The controller is not functioning when power switch is on..............24
5.Heater and Monostable Section
5.1 DigiPREP block is not heating up...................................................27
5.1.1 DigiPREP connection verification ................................................27
5.1.2 COM2 dongle verification (only if available).................................27
5.1.3 Internal wiring connection verification..........................................28
5.1.4 DigiSET verification (only if available)..........................................28
5.1.5 SSR and Monostable circuit verification ......................................28
6.A/D Converter
6.1 Possible A/D problem.....................................................................33
6.1.1 RTD input connection..................................................................33
6.1.2 A/D power and connections.........................................................34
6.1.3 A/D conversion behavior..............................................................34

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7.CPU Section
7.1 CPU board insertion .......................................................................35
7.2 Power LED malfunction..................................................................36
7.3 LCD Display problem......................................................................36
8.DigiPREP Blocks
8.1 DigiPREP Jr. Block description.......................................................37
8.2 DigiPREP MS Block description .....................................................38
8.3 DigiPREP HP Block description......................................................39
8.4 DigiPREP HT Block description......................................................40
8.5 Heater verification...........................................................................41
8.5.1 DigiPROBE error.........................................................................42
8.5.2 Heater is not heating up...............................................................42
9.Part lists
9.1 Controller major part list..................................................................44
9.2 Heating block major part list............................................................45
10.Service Departement
SCP SCIENCE .....................................................................................46
11.Index
Figures..................................................................................................47
12.Electrical Schematic
DigiPREP KeyPad................................................................................48

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1. 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, HP, HT). Operation details of the KeyPad can be found in the
DigiPREP Digestion System operation manuals or older KeyPad instruction
manuals (see references page). Those details are also included into this
document.
WARRANTY
Warranty and service for DigiPREP digestion systems
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 (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

KeyPad service manual
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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 (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 Authorization number from SCP SCIENCE before shipping the
instrument. SCP SCIENCE reserves the right to select the method of
transport.
6. (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.
1.1 ERROR MESSAGES
Some of these error messages will not appear on older equipment.
1. DigiPROBE ERROR - ensure the DigiPROBE or the DigiPROBE Dongle
is installed correctly.
2. Over Temperature Protection - the block is over heating the set point
temperature check the SSR section 3
3. Temperature Dropping - DigiPROBE is no longer in the solution and
could be measuring vapor temperature.
4. Check DigiPROBE and DigiSET Dongle - The set point temperature has
not been reached. But steady state has been reached.
5. Steady State Error. The system is detecting a constant temperature but
has not reached set point temperature.
6. Temperature Unsteady –the DigiPROBE appears to be sensing a
variation in temperature typical caused when the DigiPROBE is or is about
to become out of the solution due to evaporation.
7. Set point Exceed Sample Boiling Point –Verify the set point entered.
Note: Any of these error messages will be eliminated upon the pressing of any
key. Elapsed time is not interrupted in this sequence.

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1.2 Basic verification list
1. Visual and physical inspection
All parts are included (see section 1.5)
Voltage selector is at the right position (both block and controller)
Power cord is fully inserted
All connectors and cables are inserted accordingly
The system powers up correctly
Cable connector look fine (not bent)
Comments and observations:
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________
2. Display
Touch Screen or LCD Backlight is working
Banner Screen is appearing
Main menu screen is appearing
Fonts and video color is correct
Keypad display has clear black letters
Comments and observations:
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________

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3. Power Supply
The Fuse is fine
Power cables are correctly inserted (see section 3)
Comments and observations:
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________
4. Heater and Monostable Circuit
DigiPREP block is connected into the controller
DigiPREP block is heating accordingly
COM2 dongle is correctly inserted
DigiPROBE is correctly inserted into its socket
Comments and observations:
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________
5. CPU and general component verification
The CPU daughter card is fully inserted
The backup battery is functional
Software runs accordingly
Controller serial number _______
Software version _______

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1.3 Symptoms
The following symptoms must be verified before going into more detail (see
figure 1).
1. The block is over shooting the set point temperature, and the temperature
keeps climbing.
Check the SSR Relay section 3.1.5
2. The block is not heating
Ensure the DigiSET Dongle is installed.
The power cable is connected correctly.
Ensure the Voltage Selector Switch is at the appropriate voltage.
Verify that the 180oC NC Thermal Switch is closed (see block service
manual)
Check resistance of heater (115 v –65 ohms or 230v –32 ohms)
3. The block is heating very slowly
Ensure that the voltage selector switch is at the correct position (see
section 8).
Ensure the correct system is chosen on the utilities menu
4. No display but back light is lit
Ensure the Voltage Selector Switch is at the appropriate voltage.
5. No display and no back light
Check fuse F1.
Symptoms
Reference
Operation LED not illuminated (blue) when power is on
Section 2.1
Section 7.2
Digital Screen Backlight is not working
Section 2.2
Section 7.3
Digital Screen (LCD) is malfunctioning
Section 2.3
Section 7.3
LCD shows “DigiPROBE error”
Section 6.1
Section 8.5.1
Keypad buttons are not functioning correctly
Section 3
The controller is not functioning when power switch is on
Section 4.1
The DigiPREP block is not heating up
Section 5
The heating block is not reaching its temperature or vary
Section 6
A long and clear sound is heard when controller is powered up
Section 7.1
Figure 1: Symptoms vs. document references

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1.4 DigiPREP KeyPad Automatic Diagnostics Test Procedure
The CPU is able to perform an automatic diagnostic test. Follow the 7 simple
steps below.
1
Shut off power to the DigiPREP KeyPad.
2
Ensure voltage selector is switched to the correct position. NOTE: The selector
switch shows the voltage selected in white text.
3
Ensure that the DigiPROBE is installed, and inserted into either the block, or
the sample. If you are not using a DigiPROBE, ensure that the dongle is
connected.
4
Ensure that the block is connected, and that the connector is twisted and
locked into the receptacle.
5
Wait for 30 seconds.
6
Press and hold the key while turning the power back on
7
The DigiPREP KeyPad controller will emit up to 5 diagnostic beeps. The
beeps can be short ( __ ) or long ( ________ ) in duration. Listen and record
the length on the following chart.
Record
Beep
Pattern
1st
2nd
3rd
4th
5th
Compare the beep pattern recorded above to the chart below.
BEEP
Pattern
1st
2nd
3rd
4th
5th
Description
A
_
_
_
_
_
Normal boot
B
_
_
_________
_
_
Low battery /
Memory Failure
C
_
______
KeyPad Failure
D
_
_
_
A/D failure
E
_
_
_
_
LCD failure
F
(Continuous)
CPU error #1
G
(No beeps)
CPU error #2

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1.5 Controller Physical Description
Figure 2: DigiPREP KeyPad controller physical diagram
1. LED –Visible indication that DigiPREP KeyPad Controller is powered-up.
2. Digital Display Screen (LCD)
3. KeyPad –Input all data into controller.
4. Cable Connection –Connection port for the blocks umbilical cable.
5. Power Cord Receptacle –Receives the female end of the power cord.
6. Power switch –On/Off switch with circuit breaker.
7. DigiSET Connector (COM2) –connection port for DigiSET. DigiSET will
automatically shut off the digestion block when a pre-set sample volume is
reached. DigiSET dongle must be installed to run any DigiPREP block
without the DigiSET option.
8. Voltage selector switch –Selects appropriate voltage (115V or 230V).
I.E.: If 115 V is visible then 115 V has been selected.
1
2
3
6
5
4
7
Detachable Power Cord
8
DigiSET dongle