Time Electronics 1071 Capacitance Decade Box - Manual (Page 3)

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V1.1 P a g e | 3 1071 Technical Manual
2.
Operation
The 1071 is a portable decade capacitance box, housed in a robust metal case and
designed for industrial, laboratory and education requirements.
The unit incorporates a colour coding system which divides the setting into three groups -
µF = Red
ηF = White ρF = Yellow
The high accuracy obtained in the 1071 is achieved by the use of accurate, stable
capacitors. A thumbwheel switch provides precision selection of output capacitance.
A multiple gold contact switch arrangement ensures that should a contact fail, there is
always a back-up contact available.
To select a value simply dial up with the digit switches.
For example to set 2.746µF select:
• 2 on the 1µF bank
• 7 on the 100 ηF bank
• 4 on the 10 ηF bank
• 6 on the 1 ηF bank
Connection to the box can be made via 4mm shrouded plugs, as well as standard plugs,
bare wires, and spade terminals . Two connections red and black connect to the capacitance
and the grey terminal connects to the case for screening purposes.
Note: Remember that all capacitance boxes have a residual capacitance, i.e. even when
the dials are set to zero there is still a capacitance value across the output. If you are
making precision measurements or recalibrating the instrument this residual value must be
subtracted from all measurements.