Points (Trigger); Record Rate; All Rates - Omega RD8800 User Manual

Chapter 5 Programming

5.7.5 Points (Trigger)

The user may select which of the fifteen available points are to be used to trigger the Record Mode on or off.
Any or all points may be used to trigger recording. When activated, any alarm condition for the point in question
will start the unit recording, provided the unit is armed to trigger. Refer to Section 4.2.3.1.3. The unit will record
as long as the Alarm is True.
To enable points to trigger recording:
From the Record Setup menu, use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Points (Trigger) press the
ENTER button. The display will read "point 1=yes" or "point 1=no". Use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to
select the point you wish to turn on or off. Press the YES button to activate the point to trigger recording or the
NO button to disable the point from triggering recording. The next point will be displayed. Once all points have
been set to yes or no, press the ENTER button to return to the Record Setup menu.

5.7.6 Record Rate

The user can select the rate at which data is stored to disk independently to the rate at which it is displayed on
the chart. The Record Rate can be set for all channels at once (All Rates) or it can be set for each channel
individually (Individual Rate). The Record Rate can be set from the fastest rate of 8 times per second to the
slowest rate of once every 600 seconds or once every ten minutes. The rate you choose is dependent on how
dynamic the process that you are measuring is. If you are recording temperature which varies slowly, you can
maximize the amount of data that is stored on the disk by keeping the Record Rate slow. If you are measuring
variables that change rapidly, you may need to set the Record Rate at once per second. Thus if you have one
channel that is recording a rapidly changing input and one that is recording an input that changes slowly, you
can optimize the Record Rate for each.
There are two Record Rate options for each channel or point: a low rate and a high rate. The default rate is set
in the FUNCtion menu under the Record speed option. The Record Rate can also be changed by an external
event if the digital I/O option is fitted. Refer to Section 5.9.2. External speed change is enabled using the
Autorate option.
To set the Record Rate:
From the Record Setup menu, use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Record Rate and press the
ENTER button. The Record Rate menu will be displayed with three options: All Rates, Individual Rate, and
Autorate. These options are described in the following sections.

5.7.6.1 All Rates

To set the Record Rates for all channels at once:
From the Record Rate menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight All Rates and press the
ENTER button. You will be prompted with "secs(lo)→XXX←" where XXX is the current Low Record Rate in
seconds. Use the numeric keypad to enter the desired Low Record Rate from 0 to a maximum of 600
seconds, and then press the ENTER button. You will be prompted with "secs(hi)→XXX←" where XXX is the
current High Record Rate in seconds. Use the numeric keypad to enter the desired High Record Rate from
0 to a maximum of 600 seconds, and then press the ENTER button to return to the Record Rate menu.
Press the EXIT button at any time to return to the Record Rate menu without altering the settings.
NOTE: To set the Record Rate to 8 times per second, set the rate to 0 seconds.
NOTE: Although the Record Rates are shown as Low and High, the Low rate can be set to be faster than
the High rate. The Low and High rates are mutually exclusive and are set in the FUNCtion, Record
speed menu option. The current Record Rate (Low or High) is indicated in the Disk Status
Window: the Low rate is indicated by REC ↓ ↓ ↓ ↓ ↓ and the High rate is indicated by REC↑ ↑ ↑ ↑ ↑ . If you do not
plan to use the change Record Rate option, set both Record Rates to the same value.
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