User Manual Q&AAnswer
Jan 28, 2025 - 08:58 PM
To calibrate the Time Electronics 1024 DC Current Calibrator, follow these steps:
1. Ensure that the internal battery pack is fully recharged.
2. Remove the front panel of the calibrator by removing the front panel locating screws.
3. Locate the 7 trimmers on the front panel PCB. VR1-VR5 are located on the front panel PCB, and the other 2 trimmers are located on the side of the encapsulated module and marked 'CAL' and 'ZERO'.
4. Switch on the 1024 and allow the circuits to stabilize for a few minutes. Ensure that no draughts or direct heating affect the 1024's circuitry.
5. Calibrate at a stable temperature between 20 and 24 °C if possible.
Calibration Procedure:
1. Set the 5-digit switches to zero and select the 99.999 µA range. Adjust the output to zero (± 0.5 µA) with the 'ZERO TRIMMER' on the module.
2. Select the 9.9999 µA range and adjust the output to zero (± 0.3 nA) with VR1.
3. Set the digit switch to 99999 and select the 99.999 µA range. Adjust the output to 99.999 µA ± 5 nA with the 'CAL TRIMMER' on the module.
4. Select the 9.9999 µA range and set the output to 9.9999 µA ± 1 nA with VR2.
5. Select the 999.99 µA range and set the output to 999.99 µA ± 50 nA with VR5.
6. Select the 9.999 mA range and set the output to 9.999 mA ± 500 nA with VR4.
7. Select the 99.999 mA range and set the output to 99.999 mA ± 5 µA with VR3.
Note: If using method (b) for calibration, a highly stable 10 Ω resistor is required. A 1 Ω resistor may be used as an alternative if a suitable 10 Ω resistor is not available. 0.1 watt will be dissipated in a 1 Ω resistor.
It is recommended to operate the 1024 in its battery-powered mode for all calibration procedures to reduce the possibility of noise pick-up.
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