Fluke Calibration RUSKA 7615, Руководство пользователя

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RUSKA 7615
Users Manual
4-8
Set Point Pressure and Tolerance
Each set point in the program requires both a pressure and a tolerance , in the current
units of measure. For example, one set-point might require a tolerance as low as
0.5 (min control) psi, whereas another set-point in the same program could be satisfied
with a tolerance as high as 5 psi.
Dwell time
Once the pressure gets within the specified tolerance, the Calibrator starts a timer that
runs for a certain number of seconds. As long as this timer is running, the Calibrator will
not continue to the next set-point unless the max time elapses (see below).
Usually dwell time has a value of a few seconds, but a value of 0 can be used to create a
pause in the program. When the dwell time is set to 0, the Calibrator switches to manual
control once it gets within the tolerance value of the set-point pressure. The operator must
then press a key on the front panel to continue the exercise.
Max time
The max time is the maximum time in seconds, including the dwell time, that the
Calibrator can spend on one step of the program. After the max time elapses, the
Calibrator will automatically proceed to the next set point in the program, even if the
current set-point has not been achieved. Thus, the max time selection limits the amount of
time that the Calibrator can spend on any one set point.
Mode of entry
If the upscale portion of the sequence and the downscale portion of the sequence both
have the same highest and lowest set-points and consist of evenly spaced steps, the
<Auto> option can be used to automatically generate the program.
However, if any part of sequence includes unevenly spaced steps or the starting and
ending set-points are not the same, each step must be programmed individually. In the
example given at the beginning of Chapter 4, Measuring Pressure, each step must be
programmed individually since the starting set-point is 30 psi and the ending set-point is
20 psi.
Detailed instructions for entering these items are given in the sections that follow.
Entering a New Program
To “program” the Calibrator, the operator simply uses the keys on the front panel to
change values on the Calibrator’s program editing screen. Instructions for entering each
step of a new program are included below.
1.
Insure that the units, limits, and control parameters are at their desired values.
2. The program is entered from the Program menu. From the Main Menu (press PREV
until the Main Menu appears) press Menu [F6] | Program [F4].
3. Use the arrow keys to highlight new.
4. Press Edit [F4]. Since new was highlighted the Calibrator will create a new program
and give a default name of NAMEnn, where nn is a two digit number. The program
editing screen will appear, displaying the first step.
5. Using the numeric keypad enter the values for Pressure, Tolerance, Dwell time, and
Max time pressing ENTER after each value. The up and down arrow keys may be
used to skip fields.
6. Press Next [F1] to move to the next step.