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- Measures current down to 100pA
- All solid state and IC design
- Accepts either polarity of input
current
Introduction
Digital
Nanoammeter, DNM-121, a rugged and low cost instrument, is
a product of extensive R&D using high input impedance
integrated circuits. It has 4 decade ranges with 100% over-ranging.
The unit is suitable for current measurement in the range
of 100pA to 200µA. For the ease, readings are directly
obtained on a 3½ digit DPM. The instrument is capable
of accepting either polarity of the input current.
The very low leakage current of the input
stage combined with the high linearity fast response due to
high negative feedback enables accurate and easily reproducible
measurements. The instrument uses a FET input operational
amplifier that offers the very low input bias current, low
offset voltage, low drift and noise. These characteristics
have been fully utilized in the present Nanoammeter. This
operational amplifier is used in low level current to voltage
configuration.
Applications
- To measure current
from photomultiplier tubes, photometer etc.
- Leakage currents
in solid state devices. FET gate and tube grid voltages
without loading errors.
- Current through
very high resistance in conjunction with a power supply.
- Potentials across
semiconductors, piezoelectric systems & pH electrodes.
Specifications
| Range |
100nA,
1mA, 10mA, 100mA with 100% over-ranging |
| Accuracy |
0.2%
for all ranges |
| Resolution |
0.1nA |
| Input
Resistance |
25W,
2.5W, 0.25W,
0.025W |
| Display |
3½
digit 7 segment LED with auto polarity and decimal indication |
| Input |
Through
amphenol connector |
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Power Supply |
110V±10%,
50Hz |
| Weight |
2.5Kg |
| Dimensions |
240mm X 275mm X 120mm |
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