Agilent Technologies 1100 Series Reference Manual page 232

6 Introduction to the Detector
The main board versions -66500, -66520 and -66530 provided 4 slots for extended
memory (up to 4 × 1 MB or up to 4 × 4 MB to accommodate more run buffer (signal and
spectral data). Only 1 MB was used (no need to upgrade for any application). With main
board version -66540 the slots were removed and the 1 MB memory is now on-board (no
upgrade possible)
Firmware
For an outline of the firmware, see
require exact mathematical equations for the transformation, see the Understanding Your
Agilent ChemStation handbook.
Leak Sensor
This block consists of a PTC for the leak detection and a NTC for the ambient
temperature compensation. A leak would cool down the PTC and this change in
resistance would generate a leak signal.
Fan Drive
The operation of the fan is controlled by the main processor and runs with constant
revolution. The fan produces a sense signal which is derived from the revolution. This
sense signal is used for diagnostics.
On-board Battery
An on-board lithium battery buffers the electronic memory when the module is turned
off.
For safety information on lithium batteries see
303.
232 1100 Series DAD and MWD Reference Manual
"Firmware Description"
"Lithium Batteries Information"
on page 246. In case you
on page