Monarch Instrument ACT-3 - Manual (Page 15)

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NOTE: For applications where there is more than one pulse per revolution, the Scaling
Mode must be used.
4.2 Push Buttons
The five push buttons on the front panel have multiple functions. The following sections cover
the function of the buttons under normal operating conditions. Refer to the Measurement Mode
Button Overview on page 24 as a quick reference guide.
4.2.1 SET BUTTON
The SET button has no function on its own and must be used in conjunction with the other
buttons to set functions. Refer to Section 5.0.
4.2.2 RESET BUTTON
The RESET button, when pressed, resets the Alarms, assuming they have tripped. It is the
only way to reset a latching alarm other than via the serial interface.
NOTE: If an alarm set point is exceeded when the reset button is pressed, the alarm will
immediately trip again on the next data acquisition cycle.
If the user holds the RECALL button and then presses the RESET button, the minimum and
maximum values are reset.
In the Single Event Capture (SECAP) Mode, pressing the RESET button signals the instrument
to take a reading at the next trigger as well as its normal functions.
4.2.3 UP ( ∧∧∧∧∧) and DOWN (∨∨∨∨∨) BUTTONS
The UP ( ∧∧∧∧∧) and DOWN (∨∨∨∨∨) buttons are used to view the current settings of the alarms. The
UP ( ∧∧∧∧∧) button is used to view LIMIT 1; the DOWN (∨∨∨∨∨) button is used to view LIMIT 2.
The display will revert back to normal after a few seconds.
4.2.4 RECALL BUTTON
The RECALL button toggles between the maximum and minimum readings. The display
will revert back to normal after a few seconds. The RECALL button, when used with the
RESET button, also resets the maximum and minimum readings. In the Totalizing Mode,
the RECALL button will hold the display for a few seconds so the value on the display can
be easily read.
5.0 SETTING THE LIMITS (ALARMS)
To set the limits the user must enter the EDIT Mode. To enter the EDIT Mode, press and hold down
the SET button and press the UP (
∧∧∧∧∧) button to set LIMIT 1 or the DOWN (∨∨∨∨∨) button to set LIMIT
2. The instrument will show the current limit value, and either the LIM 1 LED will light continuously
if LIMIT 1 is being set or the LIM 2 LED will light continuously if LIMIT 2 is being set.
Upon entering the EDIT Mode, the extreme right digit will be flashing. This is the digit that is currently
being edited. This digit may be incremented by pushing the UP (
∧∧∧∧∧) button, or be decremented by
pressing the DOWN ( ∨∨∨∨∨) button. The digit is incremented or decremented by 1 each time the UP (∧∧∧∧∧)
or DOWN ( ∨∨∨∨∨) button is pressed. The digit will roll around from 9 to 0 when being incremented and
from 0 to 9 when being decremented.
To change any other digit, press the SET button. Each time this button is pressed, the next left digit
will start flashing. Each of the digits may then be incremented or decremented as above until the desired
set point is set.
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6.9 HYST2 (Hysteresis Limit 2)
Same as HYST1 but for LIMIT 2.
6.10 0SCAL (Zero Scale)
NOTE: This menu option will not be seen on an ACT-2A or ACT-3A.
Used to set the zero scale value for the analog output. Enter using the SET button. The current
value will be displayed. To exit to the main menu without changing the value, press the RESET
button or else change the value in the same way as the limit is set. Refer to Section 5.0.
6.11 FSCAL (Full Scale)
NOTE: This menu option will not be seen on an ACT-2A or ACT-3A.
Used to set the full-scale value for the analog output. Enter using the SET button. The current
value will be displayed. To exit to the main menu without changing the value, press the RESET
button or else change the value in the same way as the limit is set. Refer to Section 5.0 and 5.1.
The minimum full-scale value is 10 (shown as 00010).
6.12 BAUD (Baud Rate)
This is used to set the baud rate for the serial interface. Select this item with the SET button. Exit
back to the main menu at any time without changing the current settings by using the RESET
button. Once selected, the display will show the current setting of the baud rate. Cycle through
the choices by using the UP (
∧∧∧∧∧) button. Press the SET button when the display is on the desired
rate.
6.13 LOEND (Low End)
This menu item is only visible in the RPM, FREQ, SCALE, and SECAP Modes, since it only
affects these modes.
Select this item with the SET button. Exit back to the main menu at any time without changing
the current settings by using the RESET button. Once selected, the display will show the current
setting. Select how many seconds may elapse between input pulses before the unit displays the
reading zero. There is a tradeoff between the lowest reading available and how quickly the unit
responds when the input pulses stop and displays 0. Press the UP (
∧∧∧∧∧) button to select from three
values: 12 seconds, 1 second, and 1/2 seconds. In the RPM mode, with one pulse per revolution,
these settings correspond to the lowest RPM reading of 5, 60 and 120 RPM respectively. Press
the SET button when the desired rate is displayed.
6.14 GATE (Measurement Rates)
Sets the minimum time it takes to make a reading to STD (Standard 32.786 mSecs) or FAST
(4.096 mSecs). See Sections 3.0 and 3.2 for more details.
To enter this menu item press the SET button. The unit will display the current Gate setting. To
exit back to the main menu without changing the current settings, press the RESET button. To
select the other Gate option, press the UP (
∧∧∧∧∧) button, which will toggle between the two modes.
Press the SET button to change the mode to the option displayed and exit back to the main menu.
6.15 DIAG (Self Test)
Select this item with the SET button. This is a set of diagnostics to test the unit. It will first
display PRESS. The last “S” will change to a number depending on which button is pressed
(SET = 1, RESET = 2,
∧∧∧∧∧ = 3, ∨∨∨∨∨ = 4 and RECALL = 5). Press the SET and RESET buttons
together to go to the next test.