Lake Shore Model 647 Magnet Power Supply User’s Manual
Options & Accessories
6-4
BUNI?
Magnetic Field Units Query
Input:
BUNI?
Returned:
Either
kG
for kilogauss or
T
for tesla (10 kilogauss).
Remarks:
Returns two characters plus up to two terminators.
IBS?
Magnetic Field Summary Query
Input:
IBS?
Returned:
[IOUT], [BFLD], [STB]
Remarks:
Returns 23 characters plus up to two terminators.
6.3 MODEL 6477 HIGH RESOLUTION DISPLAY AND PROGRAMMING OPTION
This option increases the current and voltage setting, and monitoring resolution to 1 mA and 1 mV
respectively. The standard display and programming resolution is 10 mA and 10 mV.
The standard current setting DAC (digital to analog converter) has a bipolar resolution of 15 bits. The smallest
step change is 4 mA. The Model 6477 High Resolution current setting DAC has a bipolar resolution of 17 bits
and improves step change resolution to 1 mA. The voltage setting, current and voltage monitoring go through
the same type of resolution increase.
The factory must install this option prior to shipment; it cannot be field-installed. With the option installed,
Setting and Output display resolution automatically expands to the 0.001 place. Remote interface operation
does not change since remote resolution is already to the 0.0001 place. The increased resolution does not
increase MPS stability or accuracy over the standard resolution. Specifications for the Model 6477 are:
Current Display and Programming Resolution:
1 mA
Voltage Display and Programming Resolution:
1 mV
RES?
Resolution Query.
Input:
RES?
Returned:
Either
0
for low resolution or
1
for high resolution.
Remarks:
Returns two characters plus up to two terminators.
