Lakeshore Learning Materials 642 - Manual (Page 14)

Lake Shore Model 642 Electromagnet Power Supply User’s Manual
1-4 Introduction
Specifications (Continued)
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
0.1 mA/s to 99.999 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 k Ω
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 ± 5 mA ± 0.05% of rdg
Update rate 2.5 rdg/s display, 10 rdg/s interface
Output voltage (at supply terminals)
Resolution 1mV
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 White flush ON and black extended OFF push buttons