6241A/6242 DC Voltage Current Source/Monitor Operation Manual
5.2.7 Alarm Detection
5-40
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 measured data when detecting the limiter.
HL and LL indicate that the unit is currently detecting the limiter.
The following table shows a relation between limiter detection timing and Display/Remote outputs.
5.2.7 Alarm Detection
The following alarm detective function is available to help prevent damage to the 6241A/6242 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, error register, and measurement data header.
Table 5-10 below shows the messages and their descriptions and causes.
• When Source Unit or Fan Stop is generated, the output is placed in Standby and operation is not pos-
sible until the power is turned on again.
• When Over Heat is displayed, the output is placed in Standby (output OFF) and operation is not pos-
sible until the cause of the error is removed.
• When Over Load occurs, the output is placed in Standby.
Display
Remote outputs
Buzzer
Sub header Status
LMT
HL, LL
Table 5-10 Alarm Detection Contents
Message Description Cause
Source Unit Source unit malfunction Malfunction
Fan Stop Fan stopped Malfunction
Over Heat Overheat (Internal over
heat)
• Malfunction
• Sink operation outside the specified range
• The vents are blocked.
• Ambient temperature exceeds the speci-
fied range.
Over Load Overload • Over voltage applied from external device
• Connecting to the external voltage source
exceeded the voltage-limiter setting
• If output sensing is 4-wire connection, LO
OUTPUT and LO SENSE may occur in
an open status.
LMT, HL/LL indicator Limiter detected The voltage or current-limiter is operating.
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