VOLTS ACCURACY TEMPERATURE
(1 Year)
1
COEFFICIENT
5
1
⁄
2
DIGIT 18°–28°C 0°–18°C & 28°–50°C
RANGE RESOLUTION ±(%rdg+counts) ±(%rdg+counts)/°C
2 V 10 µV 0.025 + 4 0.003 + 2
20 V 100 µV 0.025 + 3 0.002 + 1
200 V 1mV 0.06 + 3 0.002 + 1
Note:
1
When properly zeroed, 5
1
⁄
2
-digit. Rate: Slow (100ms integration time).
NMRR: 60dB on 2V, 20V, >55dB on 200V, at 50Hz or 60Hz ±0.1%.
CMRR: >120dB at DC, 50Hz or 60Hz.
INPUT IMPEDANCE: >200TΩ in parallel with 20pF, < 2pF guarded (10MΩ with zero
check on).
SMALL SIGNAL BANDWIDTH AT PREAMP OUTPUT: Typically 100kHz (–3dB).
AMPS
ACCURACY TEMPERATURE
(1 Year)
1
COEFFICIENT
5
1
⁄
2
DIGIT 18°–28°C 0°–18°C & 28°–50°C
RANGE RESOLUTION ±(%rdg+counts) ±(%rdg+counts)/°C
20 pA 100 aA
2
1 + 30 0.1 + 5
200 pA 1 fA
2
1 + 5 0.1 + 1
2 nA 10 fA 0.2 + 30 0.1 + 2
20 nA 100 fA 0.2 + 5 0.03 + 1
200 nA 1 pA 0.2 + 5 0.03 + 1
2 µA 10 pA 0.1 + 10 0.005 + 2
20 µA 100 pA 0.1 + 5 0.005 + 1
200 µA 1 nA 0.1 + 5 0.005 + 1
2 mA 10 nA 0.1 + 10 0.008 + 2
20 mA 100 nA 0.1 + 5 0.008 + 1
Notes:
1
When properly zeroed, 5
1
⁄
2
-digit. Rate: Slow (100ms integration time).
2
aA =10
–18
A, fA=10
–15
A.
INPUT BIAS CURRENT: <3fA at T
CAL
(user adjustable). Temperature coefficient =
0.5fA/°C .
INPUT BIAS CURRENT NOISE: <750aA p-p (capped input), 0.1Hz to 10Hz band-
width, damping on. Digital filter = 40 readings.
INPUT VOLTAGE BURDEN at T
CAL
±1°C (user adjustable):
<20µV on 20pA, 2nA, 20nA, 2µA, 20µA ranges.
<100µV on 200pA, 200nA, 200µA ranges.
<2mV on 2mA range.
<4mV on 20mA range.
TEMPERATURE COEFFICIENT OF INPUT VOLTAGE BURDEN: <10µV/°C on pA, nA,
µA ranges.
PREAMP SETTLING TIME (to 10% of final value): 2.5s typical on pA ranges, damping
off, 3s typical on pA ranges damping on, 15ms on nA ranges, 5ms on µA and mA
ranges.
NMRR: >95dB on pA, 60dB on nA, µA, and mA ranges at 50Hz or 60Hz ±0.1%. Digital
Filter = 40.
A-2 Specifications
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