Filter - Lakeshore 336 User Manual

58 c 4: Operation
HAPTER
Curve
Curve Name
Number
01 DT-470
02 DT-670
03 DT-500-D*
04 DT-500-E1*
05 Reserved
06 PT-100
07 PT-1000*
08 RX-102A-AA
09 RX-202A-AA
10 Reserved
11 Reserved
12 Type K
13 Type E
14 Type T
15 AuFe 0.03%*
16 AuFe 0.07%
17 Reserved
18 Reserved
19 Reserved
20 Reserved
21 - 59 User Curves
*No longer offered by Lake Shore
**Instrument may not support the sensor over its entire range

4.4.10 Filter

Model 336 Temperature Controller
During normal operation, only the curves that share the input type you have selected
are displayed. If the curve you wish to select does not appear in the selection
sequence make sure the curve format matches the recommended format for the
input type selected. Refer to TABLE 4-7.
The sensor reading of the instrument can always be displayed in sensor units. If a tem-
perature response curve is selected for an input, its readings may also be displayed in
temperature.
Sensor Type
Diode
Diode
Diode
Diode
—
PTC RTD
PTC RTD
NTC RTD
NTC RTD
—
—
Thermocouple
Thermocouple
Thermocouple
Thermocouple
Thermocouple
—
—
—
—
—
TABLE 4-11 Sensor curves
Once the input is configured (section 4.4), you may choose a temperature curve. Any
standard or user curve that matches the format of the sensor type configured for a
given input will be available under the Curve parameter in the Input Setup menu for
that input. You are also given the choice of None. When set to None, front panel read-
ings configured for kelvin or Celsius will display the NOCURV message and the inter-
face will report 0 K and –273.15 °C for KRDG and CRDG queries, respectively. Data
points for standard curves are detailed in Appendix C.
Menu Navigation:
Input SetupQInput (A, B, C or D)QCurveQ(Any curve of matching type)
The reading filter applies exponential smoothing to the sensor input readings. If the
filter is turned on for a sensor input, all reading values for that input are filtered. The
filter is a running average so it does not change the update rate of an input. Filtered
readings are not used for control functions but they are used for all input features
including Max/Min.
The number of filter points determines filter bandwidth. One filter point corresponds
to one new reading on that input. A larger number of points does more smoothing,
but also slows the instruments response to real changes in temperature. The default
number of filter points is 8, which settles to within six time constants of a step
change value in 45 readings, or 4.5 s.
Model Number Temperature Range**
DT-470 1.4 - 475 K
DT-670 1.4 - 500 K
DT-500-D 1.4 - 365 K
DT-500-E1 1.1 - 330 K
— —
PT-100 30 - 800 K
PT-1000 30 - 800 K
Rox RX-102A 0.05 - 40 K
Rox RX-202A 0.05 - 40 K
— —
— —
Type K 3 - 1645 K
Type E 3 - 1274 K
Type T 3 - 670 K
AuFe 0.03%* 3.5 - 500 K
AuFe 0.07% 3.15 - 610 K
— —
— —
— —
— —
— —
For Data Points, Refer To:
Table D-1
Table D-2
Table D-3
Table D-3
—
Table D-4
Table D-4
Table D-5
Table D-6
—
—
Table D-7
Table D-8
Table D-9
Table D-10
Table D-11
—
—
—
—
—