Fluke 433 - Page 51

Calibration Adjustment
4.6 Final Calibration 4
4-9
4.6 Final Calibration
Before starting the final calibration you must have done the Warming Up (section 4.5)!
The final calibration is simple and straightforward and consists of the following elements:
- Offset adjustment of voltage and current inputs (0 V input signal).
- Low voltage adjustment of voltage and current inputs (0.67 V rms, 50 Hz input signal).
- Voltage gain adjustment of voltage inputs (120/230/480/600 V rms, 50 Hz input).
The final calibration requires input conditions that will be described in each step. You
must always start the Final Calibration at the first step, see Section 4.6.1. Starting at
another step will make the calibration invalid!
If you proceeded to calibration step N (for example step CL 0320), then return to a
previous step (for example step CL 0310) , and then calibrate this step, the complete final
calibration becomes invalid; then you must repeat the calibration starting at 4.6.1.
It is allowed to repeat a step that shows the status
:READY by pressing
F3
again.
4.6.1 Offset adjustment
Proceed as follows to do the Offset adjustment of all inputs:
1. Connect the Analyzer to the Calibrator as shown in Figure 4-3.
A/L1
B/L2 C/L3
N
GND
A/L1
B/L2 C/L3
N
CALIBRATOR
POWER
A
DAPTER
BC 430
A
NALYZE
R
INPUT
BLOCK
LO
HI
NORMAL
PM 9093 PM 9093 PM 9093
PM 9082
RED
PM 9092
Figure 4-3. Offset, Low Voltage, and Current Gain Adjustment