Lakeshore 340 User Manual page 127

COMM?
Query Serial Interface Parameters
Input: COMM?
Returned: <terminator>, <bps>, <parity>. Format: n,n,n[term]
Remarks: Returns the serial interface parameter. See COMM command for parameter descriptions.
CRDG?
Query Input Celsius Reading
Input: CRDG? <input>
Returned: <Celsius value>. Format: ±nnn.nnnE±n[term]
Remarks: Returns the Celsius reading for an input. <input> specifies which input to query.
CRVDEL
Delete User Curve
Input: CRVDEL <curve>
Returned: Nothing
Remarks: Deletes a user curve (see Paragraph 8.1.2). NOTE: Curves are not permanently updated in
the curve Flash until a CRVSAV command is issued. <curve> specifies which curve to
delete. Valid entries: 21 - 60.
Example: CRVDEL 21[term] - Deletes User Curve 21. Use CRVSAV for permanent deletion.
CRVHDR
Configure Curve Header
Input: CRVHDR <curve>, [<name>], [<SN>], [<format>], [<limit value>], [<coefficient>]
Returned: Nothing
Remarks: Configures the user curve header (Paragraph 8.1.3). NOTE: Curves are not permanently
updated in the curve FLASH until a CRVSAV command is issued.
<curve>
<name>
<SN>
<format>
<limit value> Specifies the curve temperature limit in kelvin.
<coefficient> Specifies the curves temperature coefficient. Valid entries: 1 = negative,
Example: CRVHDR 21, DT-470, 00011134, 2, 325.0, 1[term] - Configures User Curve 21 with a name
of DT-470, serial number of 00011134, data format of volts versus kelvin, upper temperature
limit of 325 K, and negative coefficient.
CRVHDR?
Query Curve Header
Input: CRVHDR? <curve>
Returned: <name>, <SN>, <format>, <limit value>, <coefficient>
Format: aaaaaaaaaaaaaaa,aaaaaaaaaa,n,nnn.nnn,n[term]
Remarks: Returns a standard or user curve header. See the CRVHDR command for parameter
descriptions. <curve> specifies which curve to query. Valid entries: 1 - 60.
CRVPT
Configure Curve Data Point
Input: CRVPT <curve>, <index>, <units value>, <temp value>
Returned: Nothing
Remarks: Configures a user curve data point (Paragraph 8.1.3). NOTE: Curves are not permanently
updated in the curve Flash until a CRVSAV command is issued.
<curve>
<index>
<units value> Specifies sensor units for this point to 6 digits.
<temp value> Specifies the corresponding temperature in kelvin for this point to 6 digits.
Example: CRVPT 21, 2, 0.10191, 470.000[term] – Sets User Curve 21 second data point to 0.10191
sensor units and 470.000 K.
Remote Operation
Lake Shore Model 340 Temperature Controller User's Manual
Specifies which curve to configure. Valid entries: 21 - 60.
Specifies curve name. Limited to 15 characters.
Specifies the curve serial number. Limited to 10 characters.
Specifies the curve data format. Valid entries:
= log Ω / K, 5 = log Ω / log K
2 = positive.
Specifies which curve to configure. Valid entries: 21 - 60.
Specifies the points index in the curve. Valid entries: 1 - 200.
1 = mV / K, 2 = V / K, 3 = Ω / K, 4
.
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