CHAPTER 1. GENERAL INFORMATION
5
Figure 1.6: External Sensor Interface: DE-9 Connector
Pin #
Description
1
+12 V
2
GND
3
-12 V
4
Signal GND
5
Voltage
6
NC
7
Current
8
NC
9
NC
Table 1.1: External Sensor Connector Pinout
1.5
Wiring External Current Sensors
This power meter accepts a wide range of external current sensors. Measurement is achieved by applying a scaling
factor to the voltage sensed at the external sensor input. A ratio of Volts to Amps is set in the EXSENSOR SET menu
of the instrument. See Section
2.6
for details. Always disconnect the main current input when using an external
sensor. The ports are electrically connected and if both are connected, measurement error and damage may occur.
1.
Connect the power supply, external current sensor, electronic load and BK5335C Power Meter as shown in
Figure
1.6
2.
Turn on the power meter
3.
Select Menu > SETUP > EXT SEN SET to access the External Sensor Setup interface
4.
Use the arrow keys to select ExSENSOR2 or EXSENSOR1, and then press ON from the soft-keys to enable the
external current sensor.
5.
Set the “Ratio” using the arrow keys and knob to set the value in V/A (EXSENSOR1) or mV/A (ExSENSOR2)
6.
Press Enter to save the settings
7.
Press Esc to exit the settings
