Cooper Instruments & Systems DPG 100 Digital Pressure Test Gage - Manual (Page 20)

6.3 Low Limit Setpoint ("L-LO") Menu Item
The Low Limit Setpoint ("L-LO”) menu item determines the pressure reading below which Limit 1 will turn "on".
This value is displayed and modified in the user-selected engineering units specified in the Engineering Units
("UNIT”) menu item. If the Engineering Units ("UNIT”) menu item is changed, the value stored in the Low Limit
Setpoint ("L-LO”) menu item will automatically convert the new engineering units.
For more information on limit operation, see "Explanation Of Limits" in Section 5.4.
6.4 High Limit Setpoint ("L-HI”) Menu Item
The High Limit Setpoint ("L-HI”) menu item determines the pressure reading above which Limit 2 will turn "on".
This value is displayed and modified in the user-selected engineering units specified in the Engineering Units
("UNIT”) menu item. If the Engineering Units ("UNIT”) menu item is changed, the value stored in the High Limit
Setpoint ("L-HI”) menu item will automatically convert the new engineering units.
For more information on limit operation, see "Explanation Of Limits" in Section 5.4.
6.5
Enable Options ("EO") Description
The Enable Options ("EO”) menu item controls the features described in the sub-sections below.
6.5.1 Auto-Off Feature
The unit will shut itself off if no buttons are pressed for approximately 1 hour. The unit can also be shut off with the
[On/Off] button. This feature is useful for conserving battery life.
6.5.2 Always-On Feature
The [On/Off] button is disabled and will not shut the unit off. This mode is used so that the high and low capture
values, output signals, or limit alarms are not interrupted if an operator tries to shut the unit off during testing or
monitoring.
6.5.3 [Zero] Button Disable Feature
This feature disables the ability to zero the display of the instrument. The ability to restore the calibrated zero is
also disabled. When the [Zero] button is pressed, the display momentarily reads "-EO-" which indicates that the
button has been disabled via the Enable Options menu item.
6.5.4 [Hi/Lo] Button Disable Feature
This feature disables the ability to read the stored high and low values on the display. The display will always read
the "live" tracking value of the process pressure. When the [Hi/Lo] button is pressed, the display will momentarily
read "-EO-" which indicates that the button has been disabled via the Enable Options menu item.
DPG 100 17 Rev Feb 2001