Output |
|
Type
|
Bipolar, 4-quadrant, DC current source |
Current generation
|
Fully linear regulation with digital setting and analog control |
Current range
|
±70 A |
Compliance
voltage (DC)
|
±35 V nominal |
Power
|
2450 W nominal |
Maximum load
resistance
|
0.6 Ω for ±70 A DC operation at +10% to -5% line voltage |
Minimum load
resistance
|
0.4 Ω for ±70 A DC operation at +5% to -10% line voltage |
Load inductance range
|
0 to 1 H |
Current ripple
|
5 mA RMS (0.007%) at 70 A into nominal load |
Current ripple frequency
|
Dominated by the line frequency and its harmonics |
Temperature coefficient
|
±15 ppm of full scale/°C |
Line regulation
|
±60 ppm of full scale/10% line change |
Stability (1 h)
|
1 mA/h (after warm-up) |
Stability (24 h)
|
5 mA/24 h (typical, dominated by temperature coefficient and line regulation) |
Isolation
|
Differential output is optically isolated from chassis to prevent ground loops |
Slew rate
|
50 A/s into nominal load, 100 A/s maximum into a resistive load |
Compliance voltage (AC)
|
±43 V at +10% to -5% line |
Setting time
|
<1 s for 10% step to within 1 mA of output into nominal load |
Modulation response
|
=0.17 Hz at ±70 A sine wave into nominal load, <0.02% THD; =1 Hz at ±10 A sine wave into nominal load, <0.05% THD; =10 Hz at ±1 A sine wave into nominal load, <0.10% THD |
Attenuation
|
-0.5 dB at 10 Hz |
Protection
|
Short circuit, line loss, low line voltage, high line voltage, output over voltage, output over current, and over temperature |
| Connector |
Two lugs with 6.4 mm (0.25 in) holes for M6 or 0.25 in bolts |
|
|
|
Output Programming |
Internal current setting
|
| Resolution |
0.1 mA (20-bit) |
| Settling time |
600 ms for 1% step to within 1 mA (of internal setting) |
| Accuracy |
±10 mA ±0.05% of setting |
| Operation |
Keypad, computer interface |
Protection
|
Programmable current setting limit |
Internal current ramp
|
| Ramp rate |
0.0001 A/s to 50.0000 A/s (compliance limited) |
| Update rate |
23.7 increments/s |
| Ramp segments |
5 |
| Operation |
Keypad, computer interface |
Protection
|
Programmable ramp rate limit |
External current programming
|
| Sensitivity |
10 V/70 A |
| Resolution |
Analog |
| Accuracy |
±10 mA ±1% of setting |
| Input resistance |
20 kΩ |
| Operation |
Voltage program through rear panel, can be summed with internal current setting |
| Limits |
Internally clamped at ±10.1 V and bandwidth limited at 40 Hz to protect output |
| Connector |
Shared 15-pin D-sub |
|
|
|
Readings |
Output current
|
| Resolution |
0.1 mA |
| Accuracy |
±10 mA ±0.05% of rdg |
Update rate
|
2.5 rdg/s display, 10 rdg/s interface |
Output voltage (at supply terminals)
|
| Resolution |
1 mV |
| Accuracy |
±5 mV ±0.05% of rdg |
| Update rate |
2.5 rdg/s display, 5 rdg/s interface |
|
|
Front Panel |
Display type
|
8-line by 40-character, graphic vacuum fluorescent display module |
Display readings
|
Output current, output voltage, and internal water temperature |
Display settings
|
Output current and ramp rate |
Display annunciators
|
Status and errors |
LED annunciators
|
Fault, Compliance, Power Limit, Ramping, Remote |
Audible annunciator
|
Errors and faults |
Keypad type
|
26 full-travel keys |
| Keypad functions |
Direct access to common operations, menu-driven setup |
| Power |
Green flush ON and red extended OFF push buttons |
|
|
Interface |
IEEE-488.2 interface
|
| Features |
SH1, AH1, T5, L4, SR1, RL1, PP0, DC1, DT0, C0, E1 |
| Reading rate |
To 10 rdg/s |
Software support
|
National Instruments LabVIEW™ driver
(consult Lake Shore for availability) |
USB interface
|
| Function |
Emulates a standard RS-232 serial port |
| Baud rates |
57,600 |
| Reading rate |
To 10 rdg/s |
| Connector |
B-type USB connector |
Software support
|
National Instruments LabVIEW™ driver
(consult Lake Shore for availability) |
Output current monitor
|
| Sensitivity |
7 V/70 A |
| Accuracy |
±1% of full scale |
| Noise |
1 mV RMS |
| Source impedance |
20 Ω |
Connector
|
Shared 15-pin D-sub |
Output voltage monitor
|
| Sensitivity |
3.5 V/35 V |
| Accuracy |
1% of full scale |
| Noise |
1 mV RMS |
| Source impedance |
20 Ω |
Connector
|
Shared 15-pin D-sub |
Power supply cooling water
|
| Remote enable input |
TTL low or contact closure to enable output; jumper required if unused |
| Valve power output |
24 VAC at 1 A maximum, automatic or manual control |
Connector
|
Shared 4-pin detachable terminal block |
Flow switch and water valve optional
|
Magnet cooling water
|
| Remote enable input |
TTL low or contact closure to enable output; jumper required if unused |
| Valve power output |
24 VAC at 1 A maximum, automatic or manual control |
Connector
|
Shared 4-pin detachable terminal block |
Flow, temperature switch and water valve not included
|
Auxiliary
|
| Emergency stop |
Requires 1 A, 24 VAC normally closed (NC) contact closure to enable power-up; jumper required if unused |
| Fault output |
Relay with normally open (NO) or normally closed (NC) contact, 30 VDC at 1 A |
| Remote enable input |
TTL low or contact closure to enable output; jumper required if unused |
Connector
|
Shared 8-pin detachable terminal block |
| Emergency stop and inhibit switches not included |
|
|
|
General |
Line power
|
| Power |
5500 VA max |
| Voltage and current |
200/208 VAC ±10%, 13 A/phase; 220/230 VAC ±10%, 12 A/phase; 380 VAC ±10%, 7 A/phase; 400/415 VAC ±10%, 6.5 A/phase |
| Protection |
3-phase thermal relay with adjustable current setting; two class CC 0.25 A fuses; over-voltage lockout circuit. |
| Frequency |
50 Hz or 60 Hz |
| Configuration |
3-phase delta |
| Connector |
4-pin terminal block |
Features
|
Soft start circuit, rear panel voltage selection indicator |
| Line voltage must be specified at time of order but is field reconfigurable; cable from power supply to facility power not included |
|
Cooling water
|
| Flow rate |
5.7 L (1.5 gal)/min minimum |
| Pressure range |
34 kPa (5 psi) to 552 kPa (80 psi) |
| Pressure drop |
10 kPa (1.5 psi) at 5.7 L (1.5 gal)/min minimum for power supply only |
| Temperature |
15 °C to 30 °C (non-condensing) |
Connection
|
Two 10 mm (0.38 in) hose barbs |
| CAUTION: Internal condensation can cause damage to the power supply |
|
Enclosure type
|
7 U high, 19 in rack mount with integral rack mount ears (25 mm (1 in) air space required on each side for ventilation) |
Size
|
483 mm W × 310 mm H × 572 mm D (19 in × 12.2 in × 22.5 in) with handles removed |
Weight
|
74 kg (163 lb) |
Shipping size
|
762 mm W × 660 mm H × 559 mm D
(30 in × 26 in × 22 in) |
Shipping weight
|
107 kg (235 lb) |
Ambient temperature
|
15 °C to 35 °C at rated accuracy, 5 °C to 40 °C at reduced accuracy |
Humidity
|
Non-condensing |
Warm-up
|
30 min at output current setting |
| Approvals |
CE mark—low voltage compliance to EN61010-3, EMC compliance to EN55022-1 |
|
|