Solartron 1287 - Digital Meters; Impedance Measurement; IR Compensation and Real Part Correction

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o
DIGITAL METERS
Resolution
Accuracy (null in use),
voltage
(3Vz digits)
voltage
(4
l
/
2 digits)
voltage
(5Vz digits)
maximum resolution
current
(3Vz digits)
current (4'/2 digits)
current
(
5V2 digits)
maximum resolution
3Vz,
4Vz, 5Vz digits
0.05% rdg + 0.25%
f.s.
0.05%
rdg
+
0.025% f.s.
0.05% rdg + 0.0025%
f.s.
lflV
0.1% rdg
+
0.25%
f.s.
0.1%
rdg + 0.025% f.s.
0.1% rdg + 0.0025%
f.s.
IpA
IMPEDANCE
MEASUREMENT
Limits
of error (for a unity gain cell, Z
C
=R
S
,
measured with LO grounded)
and no
error due
to
reference
electrode bandwidth. RE1 and
RE2 input capacitance
must
be corrected to obtain accuracy at high
frequency and impedance.
Measured
Impedance
(Q)
200nA/1M
2
pA/100k
20uA/1 Ok
200fiA/1k
2mA/1
00
20mA/
10
200mA/1
2A/0.1
Current
Range/Rs
(Q)
.3% + 0.02%/kHz
3
d
+
0.0257kHz
lOfi
10 100 Ik
10k 100k 10M
Frequency
(Hz)
IR COMPENSATION
AND REAL PART CORRECTION
Current interruption
interruption
time
accuracy
off:on range
26.6ps to 1.36ms
±6|is
1:1 to 1:255
Feedback
compensation and real part correction
range
resolution
limit
of error
fclkHz
fclOkHz
0 to 1000%R
C
0.2%±1%R
S
,0.2
C
2%±1%R
S
,2°
CSB/SI1287
User
Guide/issue AA