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FLOATING EHT UNIT
TYPE 1010
FEATURES
* Range 0 - 1000V
* Front panel polarity selection.
* Output current limit.
* Fully floating to 500V dc or peak ac
* Insulation: LO – CASE1x1013W min.
HI – CASE 5x1015Ω min. (guarded except for output connector).
* Battery operated.
* Built in battery charger with overcharge protection.
INTRODUCTION
The EHT unit is primarily intended to facilitate leakage current measurements of screened cable with the sheath at earth potential in conjunction with a picoammeter (whose case, together with associated recorder outputs etc., is also at earth potential) measuring insulation resistance up to 1015Ω.
A front panel switch is provided to enable the LO terminal to be connected to CASE when the instrument becomes a conventional EHT supply unit. The output voltage is set in 100V coarse steps together with a 0 - 110V, 10 turn potentiometer. A digital panel meter indicates the voltage appearing across the output terminals.
PERFORMANCE SPECIFICATION
Output Voltage
Range 0 - 1010V.
Adjustment Coarse Switched 0 - 1000V in 100V steps. The most clockwise position (1kV)
invalidates the fine control resulting in a fixed output voltage of 1010V.
Adjustment Fine 0 - 110V. 10-turn potentiometer.
Accuracy Coarse ±5% of indication.
Accuracy Fine ±2% of indication.
Meter Accuracy ±0.2% of FS ±1% of reading.