PD – CLSB
6Pages

P.O.Box 155 Switzerland www.prescoag.com Email:info@prescoag.com 1.3 Impaired Safety Precautions 3. Technical Data 3.1 Ordering Information

Precautions 1.1 Safety The instrument described in this manual is designed to be used by properly trained personnel only. Adjustment, maintenance and repair of the exposed equipment should only be carried out by qualified personnel aware of the hazards involved. 1.2 Safety precautions For correct and safe use of this instrument it is essential that both operation and service personnel follow generally accepted safety procedures in addition to the safety precautions specified in the manual. Specific warning and caution statements, where they apply, will be found throughout the manual. Safety...

2.1 Function Principle The calibrator is made basically from a voltage step-generator (Us) and a capacitance (Cc): If Cc << Ct, the injected charge on the terminal of the test object Ct is: q  s . Cc U The rise time (10%) of the step voltage must be lower than 100  s. The next figure shows the structure of the calibrator. A 9 V battery delivers the necessary power. A stabiliser produces 7.07 V and a lightsynchronised generator delivers the step voltage. Different capacitor units serve for the injection of charges between 5 pC and 1000 pC. T e„ u C nrllh d p y tes t o teb t r.fh v l g o...

charge values output capacitance rise time power supply battery life synchronisation uncertainty supplied with calibration certificate Dimensions Weight reference conditions temperature humidity, non condensing altitude (pressure) rated range of use according IEC 359 temperature humidity, non condensing altitude (pressure) 3.1 Ordering information Battery-PD Calibrator Scope of supply : 1 Battery Calibrator incl. battery 1 Instruction manual 1 Test certificate 5-10-100-1000pC < 150 pF < 60 ns 9 V battery type 6LR61 > 20 hours of continuous operation optical pick-up of power frequency...

Operation The measurement set-up is shown in Fig. 2. The desired charge value must be selected from the front connectors of the calibrator (2, 3, 5 or 6/Fig. 3.). The selected high - output (100 pC in Fig. 2.) must be connected to the high voltage terminal of the test object by a short lead. The common terminal is connected to the ground terminal of the test object. The calibrator can be switched on by the switch 8/Fig. 3.. If the battery has enough energy the green light 1/Fig. 3. is on. If not, the battery must be exchanged. The calibrator delivers charge pulses periodically. If the light...

Repair work and maintenance can only be done by qualified personnel of Presco AG. In case of problems please contact the representative which delivered the instrument or Presco AG directly.