Lake Shore Model 218 Temperature Monitor User’s Manual
6-20
Remote Operation
ALARM
Configure Input Alarm Parameters
Input: ALARM
<input>,<off/on>,<source>,<high
value>,<low value>,<deadband>,<latch enable>
Returned:
Nothing.
Remarks:
Configures the alarm parameters for an input.
<input>
Specifies which input to configure
(
1-8
).
<off/on>
Determines whether the instrument checks the alarm for this input.
<source>
Specifies input data to check.
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).
Example: ALARM 3, 1, 1, 320.5, 250.0,1.0, 0[term] -
Turns on alarm checking for input
3
, activates
high alarm if Kelvin reading is over 320.5, and deactivates the alarm when reading falls below
320.5 K minus the deadband or 319.5 K. Activates low alarm if Kelvin reading falls below
250.0 K, and deactivates the alarm when the reading rises above 250.0 K plus the deadband,
or 251.0 K
ALARM?
Query Input Alarm Parameters
Input: ALARM?
<input>
Returned: <off/on>, <source>, <high value>, <low value>, <deadband>, <latch enable>
Format:
n,n,+/-nn.nnn,+/-nn.nnn,+nn.nnn,n[term]
Remarks:
Returns the alarm parameters of an input. See
ALARM
command for returned parameter
descriptions.
<input>
specifies which input to query
(
1-8
).
ALARMST?
Query Input Alarm Status
Input: ALARMST?
<input>
Returned: <high status>, <low status>
. Format:
n,n[term]
Remarks:
Returns the alarm status of an input.
<input>
Specifies which input to query.
<high status>
Specifies high alarm status.
0
= Unactivated,
1
= Activated.
<low status>
Specifies low alarm status.
0
= Unactivated,
1
= Activated.
ALMB
Configure Audible Alarm
Input:
ALMB <off/on>
Returned:
Nothing
Remarks:
Enables or disables system alarm beeper. <off/on> disables/enables beeper.
1
= On,
0
= Off
ALMB?
Query Audible Alarm Parameters
Input: ALMB?
Returned: <beeper status>
. Format:
n[term]
.
Remarks:
Returns system beeper parameters.
ALMRST
Clear Alarm Status for All Inputs
Input: ALMRST
Returned:
Nothing.
Remarks:
Resets a latched active alarm after the alarm condition has cleared.