Description

Used for measurement of small current, small charge or time constant for RC experiments. Rotary switch of
extremely high insulation resistance (>500GΩ) is employed to select resistors or capacitors, to discharge
the capacitor or leave them open. Typical half times for this unit, for the built in 1nF, 100GΩ or 100nF,
1GΩ RC pairs, are from 67 to 71 seconds against theoretical values of 69.3 seconds. Complete with a UHF
male to 4mm plugs lead. Professional electrometer IC; input leakage current for amplifier guaranteed
less than 25fA. Built in moving coil meter, analogue outputs available for dataloggers or external meter.
Input resistance over 1TΩ. Selection of 1nF 1% or 100nF 2% capacitors. Selection of 10MΩ 1%, 1GΩ1% or
100GΩ1% resistors. x1 and x10 gain switch provides the decades between the built-in resistors. Charge
or current tabulated on a table on front panel for easy reference, measurement range from 1pA to 100nA,
0.1nC to 100nC.