Panametrics CGA 351, User Manual, Page: 47 / 119

CGA 351 User’s Manual 41
Chapter 4.
4.1.5.7 Setting the Maximum Duty Cycle
CAUTION!
Improper temperature controls settings can seriously degrade the performance of the instrument.
Never change these settings without specific instructions from the factory.
Enter the temperature control menu, as described on page 34, and proceed as follows:
Note: The value selected for this parameter indicates the percentage of time that the heater receives power. Thus,
a larger number results in a faster heat up to operating temperature, while a smaller number results in a
slower heat up.
Note: The
[Setpoint] ,
[Sensor Temp], [Air Offset], [Select Gas Type]
and
[Prop Band]
options are also available in
the above list box.
At the next prompt, enter the desired value for the duty cycle.
The meter now automatically returns to the “Temp. Control” prompt. Either press
[ESC]
until you exit the
User
Program or proceed to the appropriate section to continue setting up the temperature control.
4.1.5.8 Restoring the Default Values
To reset the Setpoint , Proportional Band, Integration Time and Max. Duty Cycle parameters to their default values,
enter the temperature control menu, as described on page 34, and proceed as follows:
IMPORTANT: Restoring the default values invalidates the existing calibration. It will be necessary to recalibrate the
meter (see “Calibrating the CGA 351” on page 62) before reliable readings are obtained.
Table 59:
Temp-Cntrl Use the [

] and [

] keys to
select [Max. Duty Cycle] and
press [ENTER] .
Int. Time
Max. Duty Cycle
Default
POWER ESC ENTER
Table 60:
Temp-Cn . . Duty Cycle Using the [

] and [

] keys,
position the cursor under the
desired character. Then, use
the [

] and [

] keys to
increment the value. When
done, press [ENTER] .
Duty Cycle
000
p
POWER ESC ENTER
Table 61:
Tem . . Unit-Measuring This message indicates that
changes in this menu will alter
the live data output. To
accept the new value, use the
[

] and [

] keys to select
[Yes] and press [ENTER] .
Unit measuring
Accept changes?
Yes
No Cancel
POWER ESC ENTER