Nova Eclipse TG930 - Users Manual
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5.3 MODIFY SETUP
As referred to in the description of the
MODIFY
Sub-Menu of the
SETUP
Menu, above, a notice was given concerning the many User-adjustable
features of the NOVA:
It is within the MODIFY Sub-Menu that many internal
adjustments can be made by the User to refine setups to
optimize the NOVA for special or difficult gaging applications.
For normal conditions, many of these adjustments are set
automatically, depending upon the transducer/measurement
mode combinations initially selected, and require no further
modification. Further technical discussion of these
selections/adjustments follows. If the optional data port was
ordered it is advisable to have an oscilloscope available while
making changes within the MODIFY menu.
These additional adjustments are discussed below:
NOTE: Many of the settings on this menu are also available in other menus as well. All settings
are provided here for ease of total instrument setup. For instance, if you require the assistance
of the custom application development team at NDT Systems they will have a means to inform
the user of application specific setup information.
MODE:
CONTACT or DELAY
AGC:
On or Off
GAIN:
0 - 100%
GATES:
IP-1st or IF-1st depending upon wether CONTACT or
DELAY selected. Other options are 1
st
- 2
nd
, 2
nd
- 3
rd
.
POLAR:
Polarity Select. Pos or Neg half cycle.
VEL:
Velocity Adjust
ZERO:
Zero Adjust
IP Blk:
Initial Pulse Blocking Gate
Thresh
Thickness Trigger Threshold. 0 - 100%
IF Blk:
Interface Blocking Gate (while in Delay mode)
MeasTm:
Selects the time period the AGC is actively “looking” for an
echo. Example: This feature is helpful while using the
TG930 with a water or “bubbler” style probe where the
length of the waterpath will permit longer measurements. A
D11 Delay line transducer will only allow a maximum
measurement of 0.600, while a bubbler transducer may
allow the user to measure to 1" or more total material
thickness
IPSup:
Creates a “dead zone” where the AGC is not active thereby
permitting contact transducer measurements closer to the
Nova Eclipse TG930 - Users Manual
27
Initial Pulse. For example, in optimum conditions a 5MHz
contact transducer can be set to measure as low as 0.035"
as compared to the standard minimum of 0.062"
Resol:
In Contact mode permits multi echo measurements
permitting a resolution of 0.0001" as compared to the
standard contact mode of 0.001"
Units:
In or mm
ScalLo:
Sets Lower Scale value for the Scan bar & ‘B’ Scan
ScalHi:
Sets the upper Scale value for the Scan Bar & ‘B’ Scan
ThkMode:
Selects from Normal, Differential or Min Hold
NomThk:
User selects Nominal Thickness for use in Differential Mode
Alarms:
Off, Lo, Hi or Hi/Lo
AlarmLo:
User sets the Lower Thickness value by which the TG930
will trigger the red LED alarm light
AlarmHi:
User sets the upper thickness value by which the TG930 will
trigger the red LED alarm light
