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Section III
Model
DRC-93C
3 . 4
PRECISION OPTIONS
and with which input the sensor will
be associated if remote operation is
3 . 4 . 1
The
Model 8000
Precision
used.
option
There are three types of Precision
Options available for the DRC-93C.
An
application
note
entitled
The Model
8000
Precision Option
"Fundamentals for Usage of Cryogenic
generates the data table from a Lake
Temperature Controllers" is included
Shore calibrated sensor.
The upper
as an appendix in this manual and
limit of data points is again 97,
should be read in detail if you are
with a typical calibration ranging
not familiar with cryogenic tempera-
between
30
and
40
points, depending
ture controllers.
on sensor type and temperature range
for the calibration.
The data and
accuracy of the fit is supplied to
3 . 6
CONTROLS
AND INDICATORS
the user as a separate document.
This information can then be entered
Figures
3-1
and
3-2
identify the
by the user via the front panel or
DRC-93C displays, annunciators, con-
over the computer interface.
trols, and connectors.
The iden-
tification of each item is keyed to
3.4.2
The Model
8001
Precision
the appropriate figure.
option
Lake Shore can also generate custom
FRONT PANEL DESCRIPTION
sensor response curves from the in-
dividual
sensor
calibrations as
3 . 7
POWER ON
indicated above and store them in
the DRC-93C via the
8001
Precision
Before connecting AC power to the
Option prior to shipment.
The data
DRC-93C, make sure the rear panel
and accuracy of the fit is then
voltage selector is set to corre-
supplied to the user in an Appendix
spond to the available power line
of this manual.
voltage.
Be certain the correct
fuse is installed in the instrument.
3 . 4 . 3
The Model 8002-05
Precision
option
3 . 7 . 1
Power Up Sequence
The
8002
Precision Option is used
Immediately on
POWER
ON the DRC-93C
when the customer already owns a
runs through a power up sequence as
DRC-93C and wants new sensor cali-
follows
:
bration data stored in the instru-
ment.
LSCI stores the calibration
1 .
Light Test
data in a PROM chip and sends the
programmed chip to the customer.
All digits, annunciators, and the
The PROM is then installed in the
bar graph turn on to test
the
DRC-93C by the customer.
lights.
Note that additional calibrations
The
TEMPERATURE
Block
indicates
can be added to the instrument at a
+8.8.8.8.8. in both
the upper,
later time by specifying with the
lower and setpoint windows.
The
sensor calibration at time of order,
CONTROL Block indicates
8 . 8 .
in the
the serial number of the instrument
GAIN, RATE, and RESET windows.
The
3
-2
COPYRIGHT
3/88
3 . 5 CONTROL
FUNDAMENTALS
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