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Technical Information
Table 28 I/O Connector Pin Signals (Continued)
Pin
Signal
No.
Name
9
REJECT2_
OUT
10
REJECT3_
OUT
11
REJECT4_
OUT
12
CAL_OUT_
OK
13
AUTO_
MANUAL_
RANGE_IN
14
CAL_IN
16
ZERO_IN
18
HOLD_IN
20
VENT_IN
22
TEST_IN
24
RDSTDLK_
IN
25
PARALLEL_
ENABLE_IN
Agilent Helium Leak Detector User Manual
I/O
Signal
Description
O
Level
Active HIGH when the leak rate is
over set point #2.
O
Level
Active HIGH when the leak rate is
over set point #3.
O
Level
Active HIGH when the test port
pressure is over set point #4.
O
Level
Active HIGH when calibration is
successful.
I
Level
Active HIGH when Manual
Ranging is selected.
I
> 200 ms
Active HIGH pulse.
Pulse
I
> 200 ms
Active HIGH pulse.
Pulse
I
> 200 ms
Active HIGH pulse.
Pulse
I
> 200 ms
Active HIGH pulse.
Pulse
I
Active HIGH pulse.
Level
I
Active HIGH when standard leak is
ON.
I
Level
Active HIGH when ENABLE is
active.
Leak Detector Behavior
Indicates that the value of the
leak rate exceeds the value set
in the 2REJECT variable.
Indicates that the value of the
leak rate exceeds the value set
in the 3REJECT variable.
Indicates that the value of the
test port pressure exceeds the
value set in the 4REJECT
variable.
Indicates the calibration has
successfully completed. Set
low on power-up or if
calibration is not successfully
completed.
Activation causes the leak
detector to change from AUTO
to MANUAL ranging ;
Default is AUTO.
Initiate CALIBRATING routine
with Internal Calibrated Leak;
Zeroing routine is included.
Initiate ZEROING routine.
Initiate HOLD routine and
isolate the test port and any
test objects from leak detector
vacuum system.
Initiate VENT routine and vent
the test port to atmosphere.
Initiate ROUGHING routine on
the test port and any attached
test objects.
Initiate the INTERNAL
STANDARD LEAK reading
routine.
Activation causes the leak
detector to take inputs only
from the rear panel I/O.
No control functions (inputs)
from the front panel, wireless
or RS232 are allowed.
159
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