Time Electronics 1010 DC Voltage Calibrator - Manual (Page 5)

5
1010 Technical Manual 5
2. Operation
2.1. Operating Procedure
Operation of the 1010 is self explanatory from the front panel controls and specification.
Normal precautions concerning overload and incorrect range etc., should be observed.
Battery condition should be checked on the front panel display before and during use.
For quick zeroing of output set the Polarity switch to ‘OFF’. This applies a short on the
output terminals
2.1.1. Operating Position
Unlike many potentiometers and devices incorporating Standard Cells, the 1010 DOES NOT
require operation or transportation in a particular position.
2.1.2. Output terminals
The selected output voltage is connected to the front panel safety terminal binding posts
which are suitable for normal wire compression connection or by 4mm plug insertion.
2.1.3. 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 1010 and can be earthed as
required to improve rejection of noise pick-up.
2.2. Front Panel Controls
2.2.1. Supply on/off
A miniature toggle switch interrupts the supply line to the circuit module. Indication of supply
on/off is provided by the battery level indicator.
2.2.2. Output polarity
A change-over toggle switch enables the output polarity to be reversed. A centre position
provides a short circuit on the 1010 output terminals.
2.2.3. Battery level
The battery level is continuously monitored on a front panel indicator which also serves as a
supply on-off indication. A minimum mark indicates when the batteries need replacing or
recharging.
2.2.4. Output voltage range
Selected by a 5 position rotary switch.
2.2.5. Output level:
Selected on a 5 digit thumbwheel switch. The resolution of setting is 0.01% of full scale.