Lake Shore Model 331 Temperature Controller User’s Manual
Q
TST?
Self-Test
Query
Input:
Q
TST?[term]
Returned:
<status>[term]
Format:
n
<status>
0 = no errors found, 1 = errors found
Remarks:
The Model 331 reports status based on test done at power up.
Q
WAI
Wait-to-Continue
Command
Input:
Q
WAI[term]
Remarks:
This command is not supported in the Model 331.
ALARM
Input Alarm Parameter Command
Input:
ALARM <input>, <off/on>, <source>, <high value>, <low value>,
<deadband>, <latch enable>[term]
Format:
a,n,n, ±nnnnnn, ±nnnnnn, ±nnnnnn,n
<input>
Specifies which input to configure: A or B.
<off/on>
Determines whether the instrument checks the alarm for this input,
where 0 = off and 1 = on.
<source>
Specifies input data to check. Valid entries: 1 = kelvin, 2 = Celsius,
3 = sensor units, 4 = linear data.
<high value>
Sets the value the source is checked against to activate the high alarm.
<low value>
Sets the value the source is checked against to activate low alarm.
<deadband>
Sets the value that the source must change outside of an alarm condition to
deactivate an unlatched alarm.
<latch enable> Specifies a latched alarm (remains active after alarm condition correction)
where 0 = off (no latch) and 1 = on.
Remarks:
Configures the alarm parameters for an input.
Example: ALARM
A,0[term]
–
Turns off alarm checking for Input A.
ALARM
B,1,1,270.0,0,0,1[term]
–
Turns on alarm checking for input B, activates high alarm
if kelvin reading is over 270, and latches the alarm when kelvin reading falls below 270.
ALARM?
Input Alarm Parameter Query
Input:
ALARM? <input>[term]
Format:
a
<input>
A or B
Returned:
<off/on>, <source>, <high value>, <low value>, <deadband>, <latch enable> [term]
Format:
n,n,±nnnnnn,±nnnnnn,±nnnnnn,n
(Refer to command for description)
ALARMST?
Input Alarm Status Query
Input:
ALARMST? <input>[term]
Format:
a
<input>
A or B
Returned:
<high state>, <low state>[term]
Format:
n,n
<high state>
0 = Off, 1 = On
<low state>
0 = Off, 1 = On
6-26
Remote Operation
