221
Theory of Operation
Autosampler Main Board (ASM)
signal. The leak converter consists of a PTC (for leak sensing) and an NTC
(for ambient-temperature compensation). This configuration ensures
ambient temperature changes do not affect the leak-sensing circuit.
Fan Drive
The fan speed (two speeds are possible) is controlled by the main
processor according to the internal heat distribution inside the module.
The fan provides a PWM signal which is proportional to the revolution.
This fan status signal is used for diagnostics.
Electronic Fuses
The circuits that are connected to + 36 V are fused on the board
electronically.
Onboard Battery
An onboard lithium battery buffers the electronic memories when the
module is turned off. For safety information on lithium batteries see
“Lithium Batteries Information” on page 282.
Autosampler-Specific Electronics
The autosampler specific functions provided by the electronics are:
•
closed loop control of four axis vial handling servos
•
electric valve control
•
Needle unit control
•
metering device control
Transport Unit Control
The transport drive electronics use current-controlled pulse-width
modulation (PWM) to drive the X, Z,
θ
, and gripper motors in closed-loop
servo control mode. Dedicated electronics in the SGS L6506 provide the
current-control loop. Commutation is done in FPGA logic. SGS L6201 SMT
output drivers are used for all four stepper motors. Motor encoder signals
are connected to the ASIC where the encoder quadrature decoded clock
and the up/down signal are used in the FPGA to provide instantaneous
stepper motor commutation with respect to the motor rotor position.
Wiring between the autosampler main board (ASM) and the motors and
encoders uses a flat-band cable (64 pin) and a flex board on which 10
Содержание G1313A
Страница 1: ...s1 Agilent 1100 Series Standard Micro and Preparative Autosamplers Reference Manual ...
Страница 3: ...Reference Manual Agilent 1100 Series Standard Micro and Preparative Autosamplers ...
Страница 12: ...12 Contents ...
Страница 39: ...2 2 Optimizing Performance How to optimize the autosamplers to achieve best results ...
Страница 49: ...3 3 Troubleshooting and Test Functions The modules built in troubleshooting and test functions ...
Страница 93: ...93 Troubleshooting and Test Functions Step Commands ...
Страница 159: ...5 5 Parts and Materials Detailed illustrations and lists for identification of parts and materials ...
Страница 160: ...160 Parts and Materials Main Assemblies Main Assemblies Figure 19 Autosampler Main Assemblies 5 3 4 2 1 9 8 7 6 ...
Страница 166: ...166 Parts and Materials Analytical Head Assembly Figure 21 Analytical Head Assembly 2 3 4 5 6 1 ...
Страница 191: ...191 Parts and Materials Remote Cables NOTE START and STOP are connected via diodes to pin 3 of the 3394 connector ...
Страница 216: ...216 Introduction to the Autosampler Electrical Connections ...
Страница 217: ...7 7 Theory of Operation Theory of operation of mechanical hardware electronics and instrument interfaces ...
Страница 244: ...244 Theory of Operation The Main Power Supply Assembly ...
Страница 265: ...265 Introduction to the Control Module Diagnostics and Tests ...
Страница 268: ...268 Introduction to the Control Module Diagnostics and Tests ...
Страница 269: ...9 9 Specifications Performance specifications of the Agilent 1100 Series Standard Micro and Preparative Autosamplers ...
Страница 274: ...274 Specifications Performance Specifications ...
Страница 275: ...10 Legal Safety and Warranty Information ...
Страница 286: ...286 Agilent Technologies on Internet ...
Страница 290: ...290 Index ...
Страница 291: ......