SR715/720 LCR METER
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GENERAL INFORMATION
The SR715/720 LCR Meters are multifrequency impedance measuring instruments, capable of measuring
resistance, capacitance or inductance over a range of more than 13 orders of magnitude. The SR720 has a
basic accuracy of 0.05% and has 5 test frequencies. The SR715 has a basic accuracy of 0.2% and 4 test
frequencies.
The LCR meters are controlled by a high speed microcontroller that operates the display, keypad, RS232 and
GPIB computer interfaces, and handler interface, as well as setting measurement conditions and performing
calculations. In addition, non-volatile storage is provided for 9 complete instrument settings.
SPECIFICATIONS
DISPLAY
Measurement Modes
Auto, R+Q, L+Q, C+D, C+R
Equivalent Circuit
Series or Parallel
Parameters Displayed
Value, Deviation, % Deviation or Bin Number.
Deviation and % deviation are calculated from a stored relative value.
Averaging
2 - 10 Measurements
Measurement Range
R+Q:
R
0.0001
Ω
- 2000 M
Ω
Q
0.00001 - 50
L+Q:
L
0.0001
µ
H - 99999 H
Q
0.00001 - 50
C+D:
C
0.0001 pF - 99999
µ
F
D
.00001 -10
C+R:
C
0.0001 pF - 99999
µ
F
R
.00001 - 99999 k
Ω
TEST CONDITIONS
Test Frequency
100 Hz, 120 Hz, 1 kHz, 10 kHz, 100 kHz (100 kHz - SR720 only).
Frequency accurate to ±100ppm.
Drive Voltage
Preset Levels: 0.10, 0.25, and 1.0 Vrms.
Vernier: 0.1 to 1.0 Vrms with 50 mV resolution.
Drive levels accuracy
±2%.
Measurement Rate
Slow, Medium, Fast: 2, 10, or 20 measurements per second at test
frequencies of 1 kHz and above and about 0.6, 2.4, or 6 measurements per
second at 100 Hz and 120 Hz.
Ranging
Auto or Manual
Triggering
Continuous, Manual, or Remote over RS232, GPIB or Handler Interface
Bias Voltage
Internal:
2.0 VDC ±2%
External :
0 to +40 VDC (fused @ 0.25 A)
