GASMAX II Operation & Maintenance Manual, Revision 7.0
Page 42
Figure 7-13: Sensor Balance & Voltage Set Menu
SET GAIN TO UNITY
clears any prev
ious calibration T and G I values to “ . ” and “ . ”,
respectively. This item is useful if a previous calibration was done in error, or if screen readings appear
incorrect for no apparent reason.
WARNING:
A FULL CALIBRATION SHOULD ALWAYS BE PERFORMED AFTER A SET UNITY COMMAND.
Figure 7-14: Set Gain To Unity Menu
PREAMP GAIN SET
allows adjustment of the analog amplifiers that match the sensor output to the
optimum input range for the GASMAX II signal conditioning circuits. Local Smart Sensors include factory-
preset preamp gain values and for standard sensors and applications, these values should not be changed.
For remote simple sensors or for situations where a local Smart Sensor does not quite provide enough
signal to successfully complete a SPAN calibration, the Preamp gain can be adjusted using the UP / DOWN
keys. GDS Corp does not recommend adjusting the Preamp Gain to any value higher than 85%.
WARNING:
A FULL CALIBRATION SHOULD ALWAYS BE PERFORMED AFTER ANY CHANGE IN THE PREAMP
GAIN SETTING.
Figure 7-15: Preamp Gain Set Menu
Simple Sensor Input Type Local Smart Sensors automatically configure Input Type to match sensor
requirements. However, when using remote sensors, Input Type must be set manually. Input Type is
factory preset and should not be changed unless a different TYPE remote sensor is to be installed. Input
Type configures GASMAX II hardware to accept bridge sensors, positive coefficient electrochemical
sensors, negative coefficient electrochemical sensors or 4-20 mA inputs. After selecting Input Type, a
SELECT EUNITS screen indicates the default engineering units for this sensor.
* * * * * WA RN I NG* * * * *
P r e v i o u s Ca l i b r a t i o n
w i l l b e e r a s e d .
E D I T t o c o n f i r m.
N E X T t o e x i t .
Ga i n = U n i t y
EDIT
P GA S e t u p
Ga i n 2 5 . 0 %
C o u n t s 10 11
R e a d i n g 10 0
U p / D n t o C h a n g e .
N e x t t o e x i t .
Содержание GASMAX II
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