4.1.6 Measure Units
Selects whether the Garnet displays measurements in milimeters or inches. When set to
milimeters, temprature is displayed
8
C, when set to Imperial, temprature is displayed
8
F.
4.1.7 Twist
Enables or disables the ‘Twist’ parameter. If enabled, the Twist parameter can be seleced by
pressing the
button while in Gauge mode.
4.1.8 Groove
Enables or disables the Groove measuring paddle. If disabled, only Cross-level, Gauge and Twist
can be measured, thus simplifying the operation of the Garnet.
4.1.9 Groove Latch
Enables or disables the Groove latch mechanism. If set, the maximum Groove value will be stored
until the user manually exits that measuring mode by pressing the
button. If disabled, the
Groove value will be reset if the paddle movement exceeds 5mm in the opposite direction.
4.1.10 Firmware Version
Displays the current firmware version, the operator cannot change this value. Please contact your
Geismar representative regarding firmware updates.
4.1.11 Serial Number
Displays the serial number, the operator cannot change these values. Please quote this serial
number when you contact your Geismar representative.
4.1.12 Calibration Date
Displays the date when last calibrated, if more than 12 months has elapsed, then the unit should be
returned to your local Geismar representative for re-calibration.
4.1.13 Exit Menu
Select
to exit the menu, or select
, then menu will loop around to the start (Battery).
4.2 Cross-level Rezeroing Calibration
To maintain integrity of Cross-level and Twist measurements, the Garnet should regularly undergo a
Cross-level Rezeroing calibration. This should be routinely performed
and
in the following
circumstances:-
If the Garnet has had a severe knock
During sudden changes in temperature
If the temperature differs by more than 10
°
C since the last re-zeroing (warning given)
In the event of sudden changes in temperature, for example removing the Garnet from a warm
car on a cold day, the Garnet should be left to ‘stabilise’ before it is re-zeroed or used for
measurements.
The ‘Cross-level Rezeroing Calibration’ should be performed on a section of track clear from
welds, joints and any other irregularities that may prevent the Garnet from sitting firmly on the
rails. For best results, the track Cross-level should be close to zero (<30mm).
During each re-zeroing process, the internal temperature is stored by the Garnet. During operation, the
current temperature is constantly monitored and compared to this stored value. If it differs by more
than 10
°
C then the user is forced to perform a Cross-level Rezero!!The Cross-level Rezeroing
Calibration function can also be found within the front-end user menu and is accessed by pressing the
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