Lakeshore Learning Materials 622 Uživatelský manuál stáhnout pdf (Strana 12)

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

Introduction

1-2

1.2 SPECIFICATIONS

Below are performance specifications for current with a 1 Henry load and voltage with a resistive load.

DC Output: True, Four-Quadrant, Bidirectional Power Flow output. Autoranging current and voltage operate

as a source or a sink in either polarity in current or voltage mode. Program current and compliance voltage via

the front panel, remote interfaces, or analog input. See Table 1-1 for DC Output Specifications.

Model 620 Model 622 Model 623: Model 647

Current: 0 to ±50 A Current: 0 to ±125 A Current: 0 to ±155 A Current: 0 to ±72 A

Voltage: 0 to ±5 V Voltage: 0 to ±30 V Voltage: 0 to ±30 V Voltage: 0 to ±32 V

Max Power: 250 VA contin. Max Power: 1 kVA contin. Max Power: 1 kVA contin. Max Power: 2 kVA contin.

Remote Sensing: Corrects for load lead drop of up to 0.5 V per lead. Operation with more drop per load lead

is possible with a degradation of the load effect specification.

Output Terminals: The two rear panel output bus bars are isolated from the chassis (earth) ground.

Multiple Unit Operation: Connect up to four units in an auto-parallel configuration for increased output

current capability.

Protection: Front panel annunciators, an audio indicator, and a contact closure indicate faults.

Remote Inhibit (RI): An active RI forces output settings to 0 A and 1 V until the RI is no longer active. To

continue normal operation, enter new output settings.

Output Inhibit (OI): Press the front panel OI key to force output settings to 0 A and 1 V. To continue normal

operation, enter new output settings.

Output Current Step Limit: The output current settings are forced to 0 A and 1 V if a preset current step limit

is exceeded. A key entry is required to continue operation.

Utility Low Line or Loss: Maintains operation until load is discharged or utility is restored.

Utility High Line: Turns off input and maintains operation until load is discharged.

Overvoltage: Crowbars output when output terminal voltage, induced by the load exceeds ±40 VDC.

Overtemperature: Crowbars output and turns off input when internal heat sink temperature exceeds 95 °C.

AC Input: Models 620/622/623 are factory set for operation from 100, 120, 200/208, 220, or 240 VAC

(–10%, +5%) 50 to 60 Hz single phase. Model 647 is factory set for operation from 200/208, 220, or 240 VAC

(–10%, +5%) 50 to 60 Hz single phase.

Input Protection: A front panel 20 A two-pole circuit breaker protects the AC input. The MPS turns off the

breaker in the event of a fault.

Remote Interfaces: Serial Interface is standard; IEEE-488 is optional. All front panel functions can be

controlled over the interfaces. In addition, interfaces output displayed quantities.

Input Current:

Table 1-1. Model 620/622/623 Input Current

Nominal Line

Voltage (VAC)

Line Voltage

Range (VAC)

Maximum Input

Current (A rms)

100 90 to 105 18

120 108 to 126 15

200/208 180 to 218 9

220 198 to 231 8

240 216 to 252 7

Table 1-2. Model 647 Input Current

Nominal Line

Voltage (VAC)

Line Voltage

Range (VAC)

Maximum Input

Current (A rms)

200 180 to 210 16

208 188 to 218 15

220 198 to 231 14

240 216 to 250 13

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 89 90

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