Sequoia / Tahoe Series User Manual California Instruments
M447352-01 REV-A 9
Constant-Power Mode
Operation at higher currents but constant power is possible from 72% of Voltage
range (138% of max current) declining to 100% of maximum current at 100 % of
voltage range as shown in Section 2.9 and Figure 2-4
Repetitive Peak
Current
SQ0030/TA0030 up to 4.5 / other Sequoia/Tahoe models up to 3 times of full scale
rms current.
Maximum Peak Value reflects absolute peak current protection level. This level may
not be reached under all load conditions. Depending on load conditions, peak current
may max out at lower levels due to amplifier output impedance
A repetitive peak current limit function is provided which will generate a fault and shut
off the power supply if the peak current drawn by the load exceeds the maximum
level. During this time, the amplifier will limit the peak current at a level somewhat
above the maximum level, but it is not allowable to run in this mode indefinitely. This
should provide sufficient time to ride through any startup/inrush load conditions.
A repetitive peak current limit integrator function will reduce the Repetitive Peak
Current level to 115% of rated current level in approximately 100 milliseconds. If ALC
Mode is off, power supply output will not shut off.
Frequency Resolution
0.01 Hz from 16.00 to 81.91 Hz
0.1 Hz from 82.0 to 819.1 Hz
1Hz from 820 to 905 Hz
With LKM/LKS option, 1Hz from 16 Hz to 905 Hz
Frequency
Programming
Accuracy
Standard models: ± (0.01 % of actual).
FC option: ±0.25% for greater than 550 Hz
Phase Range: 0.0 to 360.0° (Phase B/C relative to phase A)
Phase Resolution: 0.1°
Phase Programming
Accuracy:
16 Hz - 100 Hz: < 1.5°
> 100 Hz - 500 Hz: < 2°
> 500 Hz: < 4°
2.3 Output Electrical Characteristics- Source mode
Applicable for all Models
Working modes AC, DC, and AC+DC
Voltage Resolution 100mV, AC, DC, and AC+DC mode
Voltage Stability,
Typical
0.25 % over 8-hour period at constant line, load and temperature with sense lead
connected.
Voltage Programming
Accuracy
± (0.2% of full-scale) for DC and
AC - 16 Hz to 905 Hz, add ±0.1% of full scale for AC+DC mode;
From 5% V range to 100% of V range, RMS bandwidth < 10KHz
Voltage Distortion
(Resistive full load)
< 0.5 % @ 16 - 66 Hz
< 1.00 % @ > 66 - 500 Hz
< 1.5 % @ > 500 Hz
Voltage Load
regulation
0.25 % FS @ DC - 100 Hz
0.5 % FS @ > 100 Hz
Voltage Line
Regulation
0.1% for 10% input line change
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