| Output |
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| Type |
Bipolar, 4-quadrant, DC current source |
| Current generation |
Linear regulation with digital setting and analog control |
| Current range |
±60 A |
| Compliance voltage |
±5 V maximum (nominal, both source and sink) |
| Maximum power |
300 W |
| Load reactance |
0 H to 100 H |
| Current ripple (max) |
4 mA RMS at 60 A, (0.007%) into 1 mW load (significantly reduced into a reactive load or at lower current) |
| Current ripple frequency |
Dominated by line frequency and its harmonics |
| Temperature coefficient |
±15 ppm of full scale/°C |
| Line regulation |
15 ppm/6% line change |
| Source impedance |
25 W |
| Stability (1 h) |
1 mA/h (after warm-up) |
| Stability (24 h) |
10 mA/24 h (typical, dominated by temperature coefficient and line regulation) |
| Isolation |
Output optically isolated from chassis to prevent ground loops |
| Parallel operation |
2 units can be paralleled for ±120 A, ±5 V operation |
| Protection |
Quench, line loss, low line voltage, high line voltage, output over voltage, output over current, over temperature, and remote inhibit (on critical error conditions, magnet discharges at 1 V nominal) |
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| Output Programming |
| Internal current settings |
| Resolution |
0.1 mA (20-bit) |
| Settling time |
600 ms for 1% step to within 0.1 mA into a resistive lead |
| Accuracy |
±10 mA ±0.05% of setting |
| Operation |
Keyboard, computer interface |
| Protection |
Current setting limit |
| Internal current ramp |
| Ramp rate |
0.1 mA/s to 99.999 A/s (complaince limited) |
| Update rate |
27.7 increments/s |
| Ramp segments |
5 |
| Operation |
Keypad, computer interface, and trigger input |
| Protection |
Ramp rate limit |
| External current programming |
| Sensitivity |
6 V = 60 A |
| Resolution |
Analog |
| Accuracy |
±10 mA ±1% of setting |
| Bandwidth (3 dB) |
40 Hz, 2-pole, low-pass filter (10 Hz pass band, compliance limited) |
| Input resistance |
>50 kW |
| Operation |
Voltage program through rear panel |
| Connector |
Shared 15-pin D-sub |
| Limits |
Internally clamped at 6.1 V |
| Compliance voltage setting |
| Range |
0.1 V to 5.0 V |
| Resolution |
100 µV |
| Accuracy |
±10 mV ±1% of reading |
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| Readings |
| Output current |
| Resolution |
0.1 mA |
| Accuracy |
±1 mA ±0.05% of reading |
| Update rate |
2.5 readings/s display, 10 readings/s interface |
| Compensation |
Compensated for lead resistance and 25 W source resistance |
| Output voltage (at supply terminals) |
| Resolution |
100 µV |
| Accuracy |
±1 mV ±0.05% of reading |
| Update rate |
2.5 readings/s display, 5 readings/s interface |
| Remote voltage (at magnet leads) |
| Resolution |
100 µV |
| Accuracy |
±1 mV ±0.05% of reading |
| Update rate |
1.25 readings/s |
| Input resistance |
>50 kW |
| Connector |
Shared 15-pin D-sub |
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| Persistent Switch Heater Output (PSHO) |
| Current range |
10 mA to 125 mA |
| Compliance voltage (minimum) |
12 V or 21 V selectable |
| Heater resistance (minimum) |
10 W |
| Setting resolution |
1 mA |
| Accuracy |
± 1 mA |
| Operation |
On/Off with lockout delay of 5 s to 100 s |
| Protection |
Open or shorted heater detection, error message if off and on output currents differ |
| Connector |
BNC |
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| Front Panel |
| Display type |
8-line by 40-character, graphic vacuum fluorescent display module |
| Display readings |
Output current, calculated field (T to G), output voltage, and remote voltage sense |
| Display settings |
Output current, calculated field, compliance voltage, and ramp rate |
| Display annuciators |
Status and errors |
| LED annuciators |
PSHO on, remote, compliance limit, fault, and ramping |
| Keypad type |
26 full travel keys |
| Keypad functions |
Direct access to common operations, menu driven setup |
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| Interface |
| IEEE-488.2 interface |
| Features |
SH1, AH1, T5, L4, SR1, RL1, PP0, DC1, DT1, C0, E1 |
| Reading rate |
To 10 readings/s |
| Software support |
National Instruments LabVIEW™ driver
(consult Lake Shore for availability) |
| Serial interface |
| Electrical format |
RS-232C |
| Baud rates |
9600, 19200, 38400, 57600 |
| Reading rate |
To 10 readings/s |
| Connector |
9-pin D-sub |
| Output current monitor |
| Sensitivity |
60 A = 6 V |
| Accuracy |
±1% of full scale |
| Noise |
1 mV |
| Source impedence |
20 W |
| Connector |
Shared 15-pin D-sub |
| Output voltage monitor |
| Sensitivity |
1 V = 1 V |
| Accuracy |
±1% of full scale |
| Noise |
1 mV |
| Source impedence |
20 W |
| Connector |
Shared 15-pin D-sub |
| Fault output |
| Type |
Relay (closed on fault) |
| Real contact |
30 VDC at 1 A |
| Connector |
Shared 25-pin D-sub |
| Remote inhibit input |
| Type |
TTL or contact closure |
| Connector |
Shared 25-pin D-sub |
| Trigger input |
| Type |
TTL or contact closure |
| Connector |
Shared 25-pin D-sub |
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| General |
| Ambient temperature |
15 ºC to 35 ºC |
| Cooling |
Air cooled with internal 2-speed fan |
| Warm-up |
30 minutes at output current setting |
| Line power |
100, 120, 220, 240 VAC +6% -10%, single phase, 50 or 60 Hz, 850 VA |
| Size |
483 mm W × 178 mm H × 520 mm D
(19 in × 7 in × 20.5 in), rack mount
(integrated rack mount ears) |
| Weight |
27.2 kg (60 lb) |
| Approval (pending) |
CE mark - low voltage compliance to EN61010-3, EMC compliance to EN55022-1 |
| Calibration schedule |
1 year |
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