Lakeshore 340 User Manual page 138

RANGE?
Query Heater Range
Input: RANGE?
Returned: <range>. Format: n[term]
Remarks: Returns the heater range. See the RANGE command for parameter descriptions.
RDGST?
Query Input Status
Input: RDGST? <input>
Returned: <reading bit weighting>. Format: nnn[term].
Remarks: The integer returned represents the sum of the bit weighting of the input status flag bits.
<input> specifies which input to query.
RELAY
Configure Relay Control Parameters
Input: RELAY <high/low>, [<mode>], [<off/on>]
Returned: Nothing
Remarks: Configures relay control.
<high/low> Specifies which relay to configure. Valid entries: 1 (high) and 2 (low).
<mode>
<off/on>
Example: RELAY 1, 2, 1[term] - Manually turns on the high relay.
RELAY?
Query Relay Control Parameters
Input: RELAY? <high/low>
Returned: <mode>, <off/on>. Format: n,n[term]
Remarks: Returns relay control. See the RELAY command for parameter descriptions. <high/low>
specifies which relay to query. Valid entries: 1 = high and 2 = low.
RELAYST?
Query Relay Status
Input: RELAYST? <high/low>
Returned: <status>. Format: n[term]
Remarks: Returns specified relay status,: 0 = off, 1 = on. <high/low> specifies which relay status to
query. Valid entries: 1 = high, 2 = low.
REV?
Query Revision Information
Input: REV?
Returned: <master rev date>,<master rev number>,<master serial number>,<switch setting SW1>,
<input rev date>,<input rev number>, <option ID>,<option rev date>,<option rev number>
Format: nnnnnn,nn.nn.nn,nnnnnn,nnn,nnnnnn,nn.nn.nn,nnnn,nnnnnn,nn.nn.nn[term]
Remarks: Returns instrument revision information.
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Lake Shore Model 340 Temperature Controller User's Manual
Bit Bit Weighting Status Indicator
0 1 invalid reading
1 2 old reading
4 16 temp underrange
5 32 temp overrange
6 64 units zero
7 128 units overrange
Specifies relay settings mode. Valid entries: 0 = off, 1 = alarms, 2 = manual.
Specifies the manual relay settings if <mode> = 2.
Remote Operation