COSA Xentaur Xentaur LPDT - Manual (Page 32)

Section 3: Instrument
page 25
diagram of the SetUp State.
The setup state provides nine capabilities, each one con-
trolled from its own mode. Depressing the MODE button
navigates through the modes in the following order:
nSe-
lect Alternate Display Units ‹ oSelect Sensor Type ‹ pSet
Measured Attenuation of Sensor at a Low Dewpoint ‹ qSet
the Low Dewpoint at which the Attenuation was measured ‹
rSet the Calibration Mid-range Adjust ‹ sPerform a Test
and Verification of the Analog Output ‹
tSet dewpoint cor-
responding to 4mA of Analog Output ‹ uSet dewpoint cor-
responding to 20mA of Analog Output ‹
vLock/Unlock the
instrument ‹ (back to)
nSelect Alternate Display Units.
These nine functions are explained in their respective sec-
tions which follow. Changes can be made only to an
unlocked instrument, the changes are stored (when the
MODE button is pressed) and retained even if the unit is
turned off.
1. Display of alternate units: In this mode, a second engi-
neering unit can be chosen to be displayed alternating
with the engineering unit selected in the operating state,
for example, a dewpoint can be displayed alternating
with the sample temperature, or dewpoint can be alter-
nately shown in °C and in PPM.
2. Selecting the sensor type: In this mode the user can
select the software matching the type of sensor installed
in the instrument;
;7 : XTR-100 (-100°C to +20°C);
;7 : XTR-65 (-65°C to +20°C).
3&4Adjusting low end sensor attenuation and dewpoint:
These modes are used to enter a data pair representing a
low dewpoint and the sensor attenuation measured at
this low dewpoint. (see Sensor Theory of Operation
appendix E). This data pair should not be modified
unless the sensor is replaced. The sensor shipping con-