----- Analyzer of power supply quality CAVA-251 / CAVA-252 / CAVA-253 ------- Page No. 11
6.2.- CAVA connection procedure
1 Supply/Measurement
2 Clamp
connector
3
Hold / Run led
4 Communications
led
5
Hold / Run switch
6 RS-232
Supply/Measurement:
Voltage measurement is done from the own instrument’s supply.
Check that the monitored power system is within allowable voltage limits of the analyzer.
Clamp connector:
This connector is used for the input of the ammeter clamp in models
CAVA-252 & 253. Since the model CAVA-251 does not measures current, this connector is
not used. The primary of the ammeter clamp in use must be set.
During the installation process, note that the current direction through the line must coincide
with the arrow marked on the clamp, otherwise, no power value will be recorded by the
CAVA-253.
Hold / Run led:
This led indicates several operation modes:
−
Whether the led is quickly blinking: a reset action is being carried out.
−
Whether the led is blinking once per second: the analyzer has detected the switch
at the “Run” position and this is storing data into the internal memory.
−
Whether the led is always on and is not blinking: the analyzer has detected the
switch at the ““Hold”” position and no data is being stored into the internal
memory.
Communications led:
This led must be on while the analyzer is communicating with the
P.C.
Hold / Run switch:
The position of this switch is only considered when powering up the
analyzer. If at this moment the switch is at “Run”, the analyzer will record data into the
internal memory, otherwise, if the switch is at “Hold” no data will be stored into the internal
memory.
RS-232:
Connector for the communication and data downloading to a P.C.
