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3 Operating the Analyzer
What happens when a test is initiated?
Before initiating a test, wait for the Ready light to change from orange to green, which means the unit
is warmed up and ready for testing. It is possible to send commands and operate the unit prior to the
light changing to green, but it is advisable to let the unit warm up to meet specified performance.
The LAN light flashes blue when any SCPI commands or queries are sent.
The Test light flashes blue when the cell matching process has been initiated and is running.
The Test light stops flashing and turns solid blue when the cell measurement test is running and data
logging is occurring.
The Test light turns off when the measurement logging has completed.
What happens when a test stops?
Normally, a test runs for the duration of its programmed test time and then stops. A test can also be
stopped before the completion of its programmed time by pushing the Stop button or sending an
ABORt
command. The stop button must be held for 1 second to abort the current test.
When a test stops or is stopped, the Test light turns off. The Power, LAN, and Ready lights are green.
The Error light is off.
What happens when the reference temperature exceeds its specification?
The Ready light turns orange when the internal reference temperature is slightly out of regulation.
There may be a problem with the airflow. Check that the airflow at the vents is unobstructed. Once the
internal temperature is restored, the Ready light will turn to green.
The Ready light flashes red when the internal reference temperature has increased to where damage
could occur. When this happens the internal heaters are disabled and the operating temperature
range will not be maintained. Turn the unit off, let it cool down, then turn it on to clear the condition.
What happens when a protection event, inhibit, or error occurs?
The Error light turns red when a protection event, external inhibit, or error has occurred.
If a protection event occurs on a channel, that channel is disconnected from the cell. You can continue
running the test on other channels. The channel that tripped protection remains disconnected from
the cell until protection is cleared.
If an external inhibit occurs, all channels will be disconnected from the cells.
If an error occurs, the instrument will continue to operate with errors present.
Clearing these conditions can only be done with the test program by sending the
OUTput:PROTection:CLEar
command. There is no front panel control to clear a protection event,
inhibit, or error. Once the test program clears these events, the Error light turns off.
Keysight BT2152A/B Operating and Service Guide
37
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