SCP SCIENCE DigiPREP Jr. - 1. Introduction; 1.4 DigiPREP KeyPad Automatic Diagnostics Test Procedure

KeyPad service manual
Rev.1.1
2
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