Lake Shore Model 340 Temperature Controller User’s Manual
Remote Operation
9-29
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>
Specifies which curve to configure. Valid entries:
21
-
60
.
<name>
Specifies curve name. Limited to 15 characters.
<SN>
Specifies the curve serial number. Limited to 10 characters.
<format>
Specifies the curve data format. Valid entries:
1
= mV / K,
2
= V / K,
3
=
Ω
/ K,
4
= log
Ω
/ K,
5
= log
Ω
/ log K
.
<limit value>
Specifies the curve temperature limit in kelvin.
<coefficient>
Specifies the curves temperature coefficient. Valid entries:
1
= negative,
2
= positive.
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>
Specifies which curve to configure. Valid entries:
21
-
60
.
<index>
Specifies the points index in the curve. Valid entries:
1
-
200
.
<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.