Specifications

Output
 
Type
Bipolar, 4-quadrant, DC current source
Current generation
Fully linear regulation with digital setting and analog control
Current range
 
±135 A
Compliance
voltage (DC)
±75 V
Power
9.1 kW nominal
Nominal load
0.5 Ω, 0.5 H
Maximum load
resistance
0.55 Ω for ±135 A DC operation at +10% to -5% line voltage
Minimum load
resistance
0.41 Ω for ±135 A DC operation at +5% to -10% line voltage
Load inductance range
0 H to 1 H
Current ripple
10 mA RMS (0.007%) at 135 A into nominal load
Current ripple frequency
Dominated by the line frequency and its harmonics
Temperature coefficient
±50 ppm of full scale/°C
Line regulation
±75 ppm of full scale/10% line change
Stability (1 h)
2 mA/h (after warm-up, internal setting)
Stability (24 h)

 
10 mA/24 h (typical, internal setting, 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 (dominated by magnet characteristics), 100 A/s maximum into a resistive load
Setting time
<1 s for 10% step to within 1 mA of output into nominal load
Harmonic distortion



≤0.1 Hz at ±135 A sine wave into resistive load, <0.02% THD; ≤10 Hz at ±10 A sine wave into resistive load, <0.30% 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
ConnectorTwo lugs with 8.64 mm (0.34 in) holes for M8 or 5/16 in bolts
  
Output Programming
Internal current setting
Resolution 1.0 mA (20 bit)
Settling time 600 ms for 1% step to within 1 mA (of internal setting)
Accuracy ±20 mA ±0.05% of setting
Operation Keypad, computer interface
Protection
Programmable current setting limit
Internal current ramp
 
Ramp rate 0.1 mA/s to 50.000 A/s (compliance limited)
Update rate 12.3 increments/s
Ramp segments 5
Operation Keypad, computer interface
Protection
Programmable ramp rate limit
External current programming
Sensitivity10 V/135 A
Resolution Analog
Accuracy ±20 mA ±1% of setting
Input resistance 20 kΩ differential; 50 kΩ common-mode
Operation Voltage program through rear panel, can be summed with internal current setting
LimitsInternally clamped at ±10.1 V and bandwidth limited
-3 dB at 40 Hz (two pole, low pass filter)
ConnectorShared 15-pin D-sub
  
Readings
Output current
Resolution 1.0 mA
Accuracy±20 mA ±0.05% of rdg
Update rate
2.5 rdg/s display, 10 rdg/s interface
Output voltage (at supply terminals)
Resolution1.0 mV
Accuracy±10 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
20 full-travel keys
Keypad functions Direct access to common operations, menu-driven setup
PowerGreen flush ON and red extended OFF push buttons
Interface
IEEE-488.2 interface
 
FeaturesSH1, AH1, T5, L4, SR1, RL1, PP0, DC1, DT0, C0, E1
Reading rate To 10 rdg/s
Software support

LabVIEW™ driver
USB interface
FunctionEmulates a standard RS-232 serial port
Baud rates 57,600
Reading rate To 10 rdg/s
ConnectorType B USB connector
Software support

LabVIEW™ driver
Output current monitor
Sensitivity7 V/135 A
Accuracy±1% of full scale
Noise5 mV RMS
Source impedance 20 Ω
Connector
Shared 15-pin D-sub
Output voltage monitor
Sensitivity7 V/70 V
Accuracy1% of full scale
Noise2 mV RMS
Source impedance20 Ω
Connector
Shared 15-pin D-sub
Power supply cooling water
 
Remote enable inputTTL low or contact closure to enable output; used for mandatory 1 gal/min flow switch (included)
Connector
2-pin detachable terminal block connector
Valve power output24 VAC at 1.5 A maximum, automatic or manual control
Connector
2-pin detachable terminal block connector
Water valve optional
Magnet cooling water
 
Remote enable inputTTL low or contact closure to enable output; jumper required if unused
Valve power output24 VAC at 1.5 A maximum, automatic or manual control
Connector
Shared 4-pin detachable terminal block connector 
Flow, temperature switch and water valve not included
Auxiliary
Emergency stop Requires 1 A, 24 VAC normally closed (NC) contact  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 connector 
Emergency stop and inhibit switches not included
  
General
Line power
 
Power15.5 kVA max
Voltage and current 200 VAC ±5%, 41 A/phase
208 VAC ±5%, 40 A/phase
220 VAC ±5%, 38 A/phase
230 VAC ±5%, 37 A/phase
380 VAC ±5%, 23 A/phase
400 VAC ±5%, 21 A/phase
415 VAC ±5%, 21 A/phase
Protection3-phase thermal relay with adjustable current setting; two class CC 2 A fuses; over-voltage lockout circuit
Frequency 50 Hz or 60 Hz
Configuration 3-phase delta
Connector4-pin terminal block
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 7.6 L (2.0 gal)/min minimum
Maximum pressure 552 kPa (80 psi)
Pressure drop 159 kPa (23 psi) at 7.6 L (2.0 gal)/min minimum for power supply and mandatory flow switch
Temperature15 °C to 30 °C (non-condensing)
Connection
Two 12.7 mm (0.5 in) hose barbs
CAUTION: Internal condensation can cause damage to the power supply
 
Enclosure type


Custom 19 in rack cabinet
Size

559 mm W × 1054 mm H × 673 mm D (22 in × 42 in × 26 in)
Weight
225 kg (495 lb)
Shipping size

914 mm W × 1219 mm H × 1168 mm D
(36 in × 48 in × 46 in)
Shipping weight
281 kg (620 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 EN61010-1, EMC compliance to EN61326-1