Download Ionization Chamber Controller User Manual

PSI System Controls and Diagnostics
Re-calibrate (cables should not calibration)
be connected during
calibration)
Unit not collecting data
Inappropriate trigger mode
(waiting for external trigger
when none present)
Select internal trigger mode.
Use appropriate trigger mode.
Missing data in csv log
Data rate exceeds
communication rate
Use buffered acquisition.
Use buffered acquisition when
appropriate.
No monitor pulse output
Incorrect configuration of
charge per pulse value
Check setting
Use appropriate setting.
No signal at HCC input –
monitor pulses are derived
from HCC signal.
Check connections.
Connect relevant signal to
HCC.
Unit is not measuring’
Check I128 state
Ensure I128 is initiated and
triggered when necessary.
Unit is configured for wrong
type of monitor pulse.
Check purchase specification.
Return unit to Pyramid
Technical Consultants, Inc. for
modification if necessary.
Incorrect gate polarity
selected.
Check settings
Use correct polarity.
Incorrect trigger mode setting
Check settings
Use a suitable trigger mode
No or incorrect response to
external gate
Source of gate signal unable to Tee off signal and check
drive the I128 input
amplitude on oscilloscope.
impedance (2.5 kohm) or any
added terminating impedance.
I128 User Manual
I128_UM_141014
Page 112 of 121
Use suitably rated trigger
source.