6247G/6247C DC Voltage Current Source/Monitor Operation Manual
5.2.7 Alarm Detection
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5.2.6.3
Displaying and Outputting of Limiter Detection
Three indicators, LMT, HL, and LL are used for displaying the limiter detection.
LMT indicates that measured data is obtained in the limiter detection status.
HL and LL indicate that the limiter is currently being activated.
The following table shows a relation between limiter detection timing and display/remote output.
5.2.7
Alarm Detection
The following alarm detective function is available to prevent damage to the 6247G/6247C as well as the
DUT. When any of these alarm conditions is detected, a message is displayed and output to the remote
device event register, the error register and the header of measurement data.
The following table shows the messages and their descriptions and causes.
•
When Source Unit or Fan Stopped occurs, the output is set to Standby and operation is not possible
until the power is turned on again.
•
When Over Heat occurs, the output is set to Standby and operation is not possible until the cause of
the error is removed.
•
When Over Load occurs, the output is set to Standby.
Display
Remote output
Buzzer
Sub header
Status
LMT
Yes
No
No
HL/LL
No
Yes
Yes
Table 5-10 Alarm Detection Contents
Message
Cause
Source Unit
Source unit malfunction
Fan Stopped
Malfunction
Over Heat
• Malfunction
• Sink operation outside the specified range
• The vents are blocked
• Ambient temperature exceeds the specified range
Over Load
• Over voltage applied from an external device
• Connecting to an external voltage source exceeding
the voltage limiter setting
• If output sensing is 4-wire connection, LO OUTPUT
and LO SENSE may open
LMT/HL/LL indicator
The voltage or current limiter is activated.
