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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual

Remote Operation

4-12

OVP? Overvoltage (Quench) Protection Circuit Status Query

Input: OVP?

Returned: 0 if the circuit is inactive, or 1 if it is active.

Remarks: One character plus up to two terminators are returned.

RES? Resolution Query

Input: RES?

Returned: 0 for low resolution or 1 for high resolution. (This command maintains compatibility with older

MPS versions. Remote interface operation does not change since the remote resolution is

already to the 0.0001 place.)

Remarks: Returns two characters plus up to two terminators.

RI? Remote Inhibit Status Query

Input: RI?

Returned: 0 if the remote inhibit is inactive, or 1 if it is active.

Remarks: One character plus up to two terminators are returned.

VOUT? (V?) Output Voltage Query

Input: VOUT? or V?

Returned: A number between 0 and ±5.000 V (620), 0 and ±30.000 V (622/623),

or 0 and ±32.000 V (647).

Remarks: Returns nine characters plus up to two terminators.

VSET (V) Enter Compliance Voltage

Input: VSET [voltage] or V [voltage] where [voltage]: = a value from 0 and ±5.000 V (620),

0 and ±30.000 V (622/623), or 0 and ±32.000 V (647).

Remarks: The initial condition is +00.0000 V. The voltage setting is always forced to a “+.” Control Bus

inputs 4 places, display rounds to 0.01 or 0.001 place.

VSET? Compliance Voltage Setting Query

Input: VSET?

Returned: A number between 0 and ±5.000 V (620), 0 and ±30.000 V (622/623),

or 0 and ±32.000 V (647).

Remarks: Returns nine characters plus up to two terminators.

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