Time Electronics 1024 DC Current Calibrator - Manual (Page 5)

5
1024 Technical Manual 5
2. Operation
Despite being a precision instrument the 1024 does not require special operating conditions
or procedures. Its robust construction and stable solid state circuitry enables it to be used in
nearly all applications with only the normal operating precautions.
2.1. Front Panel Controls
a) Output terminals
The 1024 output current is from two front panel terminals which are suitable for wire
compression or 4mm plug insertion. The output current will flow from the + (red) terminal
when the polarity switch is ‘normal’.
b) Case terminal
The case terminal is connected only to the instrument case and is isolated from the circuitry.
The case provides an overall electrostatic screen for the 1024 and can be earthed as
required to improve rejection of noise pick-up.
c) Supply ON-OFF
A miniature toggle switch interrupts the supply line to the circuitry. Indication of supply ‘on’
or ‘off’ condition is provided by the battery level indicator.
d) Output Polarity
A change-over toggle switch enables the output current polarity to be reversed. A centre ‘off’
position provides an open circuit on the output terminals.
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