Lake Shore Model 330 Autotuning Temperature Controller User’s Manual
2-8
Installation
Table
2-3.
Sensor
Curves
Sensor curves are defined
as follows:
D and E1 Curve:
Older
Lake Shore DT-500 Series
Diode Sensors can still use
the Model 330 when set to
D-Curve (Domestic) or E1-
Curve (Export).
Curve 10:
The Lake Shore
DT-470 Series silicon
diodes follow the same
standard temperature
response Curve 10 which
allows them to interchange
with one another. Lake
Shore programs Curve 10
into all Temperature Controllers, Digital Thermometers, and Temperature Transmitters. DT-470 Series silicon
diode sensors come in five bands of tracking accuracy, allowing selection based on both performance and
expense.
Platinum Curve:
Users of the Model 330-2X have the option of the standard platinum curve, or the precision
option. The standard platinum curve (see Appendix C) conforms to DIN 43760:1980; IEC 751:1983; and
1904:1984. DIN 43760 is the standard that defines the characteristics of a 100
Ω
platinum RTD with a
resistance vs. temperature curve specified by
α
= 0.00385
Ω
/
Ω
/°C.
Thermocouple Curves:
Select the curve that matches the type of thermocouple used.
User Curves 11 thru 31:
In addition to the standard curves, Curve Numbers 11 thru 31 provide space for
20 user-defined curves (see Table 2-3). They may be user-defined curves, Precision Calibration Option
Curves purchased from Lake Shore (see Paragraph 2.9), or curves purchased from other vendors. User
defined curves can have up to 97 points plus two end points. Load points into the controller over the serial
interface (Paragraph 4.4), or buy a factory-installed Precision Calibration Option Curve from Lake Shore.
SoftCal Curve
. SoftCal curves store in curve location numbers 11 thru 31 as a User Curve. See Table 2-3
and Paragraph 3.2.7 to use SoftCal.
2.8 PRECISION CALIBRATION OPTION
There are three Model 330 precision options. The Model 8000 Precision Calibration Option generates the data
table from a Lake Shore calibrated sensor. The maximum number of data points is 99, but a typical precision
calibration option ranges between 30 and 40 points depending on the sensor type and temperature range of
the calibration. Lake Shore supplies data and accuracy of the fit which the user may enter over the Serial or
IEEE-488 Interface.
Prior to shipment, Lake Shore can also generate a custom sensor response curve from the individual sensor
calibration and store it in the Model 330 via the Model 8001 Precision Calibration Option.
The Model 8001 is
factory-installed when you order an instrument with a calibrated sensor. To order an instrument to be used
with an existing Lake Shore calibrated sensor, supply Lake Shore with the sensor model and serial number at
the time of order.
The Model 8002-05 is for field installations of the Precision Calibration Option in an existing Model 330. Lake
Shore stores the calibration data in a NOVRAM and sends the programmed IC to the customer. The IC is then
installed in the instrument by the customer. The user must supply the Model 330 serial number at the time of
order.
Curve No. No. of Lines Range (K)
Description
00
01
02
03
04
05
06
07
08
09
10
11 – 31
31
31
31
31
88
31
31
31
31
31
31
—
1 – 325
1 – 325
1 – 325
14 – 800
2 - 475
—
1.4 – 325
*
4 – 325
*
3 – 425
*
3 – 525
*
3 – 485
*
—
DT-500 DRC Curve D (Domestic)
DT-500 DRC Curve E1 (Export)
DT-400 Series Sensors Curve 10
Platinum DIN 43760
Curve 10 (SoftCal)
Reserved
AuFe 0.07% vs. Chromel
AuFe 0.03% vs. Chromel
Type E
Type K
Type T
User Curves or Precision Calibration
Option (See Table 3-1)
*
Values are for thermocouples with compensation. Uncompensated thermocouples can use full ±15 mV range
.