Fluke 433 - Page 30

Fluke 433, 434, 435
Service Manual
3-6
3.6. Verification of Current Inputs
3.6.1 Preparation
Proceed as follows:
• Reset the Analyzer.
• Press
SETUP
. Set the Analyzer to 3-phase WYE, 60 Hz, 120 V. Set Clamp for Phase
and Neutral to 1 mV/A, 400 A, 1:1.
• Set the Analyzer in DEMO mode: press SETUP, press F3 - FUNCTION PREF, and
select DEMO ON with F1. Demo mode gives increased sensitivity at the voltage
inputs. Input voltage must not exceed 2 V rms in Demo mode!
3.6.2 Accuracy
Proceed as follows:
1. Must be checked for all phases A/L1, B/L2, C/L3, and N(eutral).
2. Set the Calibrator to 1 V, 60 Hz and STBY.
3. Connect the LO output (black) with the Ground (green) input of the Analyzer.
Connect the HI output (red) with all current (BNC) inputs and the A/L1, B/L2, C/L3,
and N voltage banana inputs of the Analyzer. Refer to Figure 3.2.
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 3-2. verification of Current Inputs
4. Set the Calibrator to OPR (Operate, indicated by a green LED in the OPR key or on
the display).
5. On the Analyzer press MENU, select Volts/Amps/Hertz, press F5 – OK to enter the
function.