Orbisphere 3600 series - 1.3 Instrument Operation, Measurement, and Calibration

8 3600 Analyzer for O
2
Measurement—Operator’s Manual
3600O2.OM.E9903
1.3 Instrument Operation
Once you have reviewed the previous sections of this manual, connect the sensor
to the instrument and turn the keyswitch to the horizontal “on” position. The
system automatically starts in “measurement” mode.
Front Panel Keyswitch
The instrument function keys are active only if the keyswitch is in the horizontal
“on” position. Choose the vertical “locked” position when measuring, to avoid
accidental or unauthorized parameter modification.
Instrument Function Keys
The red “ESC” key lets you jump back a step in the program. Following the flow
chart in section 1.3.1, you will see, for example, if your instrument were displaying
the “Measurement” menu, pressing “ESC” would return you to “Measure
Options Calibrate” (also known as the “main menu”).
MEASURE OPTIONS
CALIBRATE
Use the yellow “ñ” and “ò” arrow keys to scroll through available options at
various stages of operation. Pressing “ñ” moves the “blink” from right to left and
“ò” moves it in the opposite direction. During measurement, use these keys to fix
on a specific displayed measurement range, as described in section 1.3.2.
The red “ENTER” key (“DO” on older instruments) lets you select an item. Note
that when inputting numbers (for example, an alarm limit) the menu displays four
digits, with one digit highlighted by the symbol “^”. This digit is incremented by
pressing “ñ” key and decremented by pressing “ò”. Pressing “ENTER” shifts the
highlight one digit to the right, until last digit, in which case the new whole value is
memorized. (Note that if power is disconnected, the system remembers any values
entered via the “ENTER” key when power is resumed.)
The “ENTER” key also activates a single RS-232 transmission when the
instrument is measuring (and the RS-232 output is in “Manual” mode, as
described in section 1.4.5).
For most installations, calibrating the instrument’s internal atmospheric pressure
sensor and calibrating the O
2
sensor in air are necessary first steps. The instrument
is factory calibrated for typical applications. However, it is recommended that you
recalibrate the O
2
sensor before making any measurements, using the procedures
described in section 1.3.3.
You may wish to familiarize yourself with the “Modify Options” menus described
in section 1.4. Your instrument is pre-set with certain default values, which enable
you to get started on actual measurements with a newly delivered system, but later
you may need to make other choices of parameters.