Red Lion GEMINI 2 - Manual (Page 19)

the case with all standard rate indicators. In order to ensure this type of operation,
it is important that the reset Disable/Enable switch be disabled to preclude any
unwanted re-start of the sample time cycle.
Certain special application requirements may exist for the sample time cycle to
commence at a specific time. In these applications, the remote reset terminal or the
front panel reset button (if the Disable/Enable switch is set to the enable position),
maybeusedtoactivatethefollowingtworesetmodes,thusstartingthesampletime.
[51 1] MANUAL RESET TO ZERO (RTZ) - Manual reset to zero is
accomplished by pulling remote reset to ground or by pressing the front panel
reset button. In this mode the sample time is initiated immediately upon
release of the reset button.
[51 -1] MANUAL RESET TO ZERO (RTZ) - Same as [51 1] except that the
sample time is initiated immediately upon pressing the reset button.
CODE 52 - OUTPUT 1 TERMINATION MODES
The Gemini has two standard Output 1 Termination Modes when operating as
a rate indicator. They are: Terminate After Time Delay and Boundary.
A reverse phase option is available on the Gemini. This refers to
complementing the logic state of the output. For normal phase operation the reset
condition of the output is output off. For reverse phase operation the reset
condition of the output is output on. (Note: The state of the relay, if used, is also
reversed.) A “-” sign in front of the mode identifier will provide for reverse
phase operation. The absence of a “-” sign will give normal phase operation.
[52 5] TERMINATE AFTER OUTPUT 1 TIME DELAY - In this mode, output 1
activates at the end of each sample time in which the rate is lower than Preset 1.
Once the output has been activated, it will deactivate after the predetermined
length of output 1 time delay has expired. If the output 1 time delay is longer
than the sample time, the output time delay will continually be restarted without
timing out until the rate exceeds the Preset 1 value. Manual reset, by either the
front panel button or the reset terminal, will override the output time delay and
reset the output. The output is set for normal phase operation.
[52 6] BOUNDARY MODE - When in the boundary mode, the preset 1 value
serves as the boundary point. When the rate value is more negative than the
preset, the output is not activated. When the rate value is more positive than or
equal to the preset, the output activates. If the rate value were to drop below
preset, the output would again deactivate. For negative preset points (Negative
Scale Factor), the output is not activated when the rate value is more positive
than the preset value. When the rate value is more negative than or equal to the
preset, the output is activated. If the rate value becomes more positive than the
preset, the output again deactivates. The output is set for normal phase.
In addition, when functioning as a rate indicator, the Gemini also has two special
use function modes, Terminate at Manual Reset and Terminate at Manual
Reset End. These modes are infrequently used. However, they may be useful
when a requirement exists to latch and manually release the output.
[52 3] TERMINATE AT MANUAL RESET - In this mode, Output 1 activates
when the rate exceeds the Preset 1 value. Once activated, the output does not
deactivate until the moment a reset occurs. The reset can be from the front
panel button or from the remote reset terminal, at the rear of the unit. The
output is set for normal phase operation.
[52 4] TERMINATE AT MANUAL RESET END - This mode is like the
preceding output mode, except the output deactivates when the reset ends. The
output is set for normal phase operation.
[52 -3]
[52 -4] These modes are the same as above with the exception
[52 -5] that the output is set for reverse phase operation.
[52 -6]
CODE 53 - OUTPUT 1 TIME DELAY
The Gemini has the capability of varying the output time delay from 0.01 second
to 599.99 seconds. When the code is entered, instead of a single mode identifier
digit being displayed, six digits will be shown. Refer to the “Programming Preset,
Scale Factor, and Output Time Delay” section for more details about entering.
Output time delay will be terminated if the unit is manually reset.
Note: A time delay value of zero cannot be programmed into the Gemini. If a
value of 0 is entered into the display and the “E” key is pressed, the unit will
not enter the 0, but will revert back to displaying the previous time delay.
–17–