Lakeshore 330 User Manual page 63

Lake Shore Model 330 Autotuning Temperature Controller User's Manual
CURV
(continued)
To view a typical output after using this command, see the example under the CURV?
command. When entering, omit temperature coefficient, number of points, and endpoints.
The Model 330 determines and stores whether the curve is a positive or negative coefficient
curve. Based on temperature coefficient, the Model 330 then stores the curve end points and
also adds the number of points.
INPUT TYPE
Silicon Diode
GaAlAs Diode
Thermocouple
To aid in automated loading of User Curves for Serial Interface users, see the QuickBASIC
Curve Loading Program in Paragraph 4.4.
CURV?
Curve Number Information Query.
Input:
CURV? XX
Returned: AA,SB0CCCCCCCCCCCCCCC,D,XX,Y.YYYYY,ZZZ.Z...
Remarks: User must provide curve number (00 thru 31) with query. The unit will return header line and
all point information for that curve as follows:
A = Curve number from 11 to 31.
S = For the Model 330, the first character must be the letter "S."
B = Setpoint Limit: 0 = 325 K, 1 = 375 K, 2 = 475 K, 3 = 800 K, 4 = 999 K.
0 = Fixed Character - 0 for all curves except 9 for thermocouples.
C = 15-character curve description.
D = Temp. coefficient: N = negative coefficient; P = positive coefficient.
X = Number of points for the curve (usually 31, but can be up to 99).
Y = Units: voltage or R
after it (0.00000).
Z = Temperature with 3 places before the decimal point and one after it (000.0).
After sending the CURV? command, values returned include temperature coefficient, number
of points, and beginning and end points. This is normal. This extra information shows in bold
in the example below.
Example:
11,S10USERCURVE
0.00000,499.9,0.19083,365.0,
0.24739,345.0,0.36397,305.0,
0.42019,285.0,0.47403,265.0,
0.53960,240.0,0.59455,220.0,
0.73582,170.0,0.54606,130.0,
0.95327,090.0,1.00460,070.0,
1.04070,055.0,1.07460,040.0,
1.09020,034.0,1.09700,032.0,
1.10580,030.0,1.11160,029.0,
1.11900,028.0,1.13080,027.0,
1.14860,026.0,1.07200,025.0,
1.25070,023.0,1.35050,021.0,
1.63590,017.0,1.76100,015.0,
1.90660,013.0,2.11720,009.0,
2.53660,003.0,2.59840,001.4,
6.55360,000.0[term]
Remote Operation
UNITS
Voltage
—
Platinum Resistance
Millivolts
(see CURV Command) with 1 character before the decimal and 5
equiv
,N,31,
CONVERSION
Input range is 0.00000 to 2.50000.
No conversion necessary: 0.00000 to 6.00000
Input range is 0.00 to 299.99 Ω. 0.00 Ω looks
like 0.00000 and 299.99 Ω looks like 2.99990
(0.01 times R).
Input range is –15 to +15. Add 15 mV to make
all positive 0-30 mV and multiply by 100 to
make look like 0-3.00000 V. For example, a
thermocouple voltage of –5.0000 mV would be
entered as 1.00000V.
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