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990-005500 Revision D
Description
The Electro-Sentry 1 (a.k.a. ES1) is a Complete Single-Leg
Hazard Monitoring System. The ES1 contains the following:
At-a-glance Temp/Speed monitoring with alarm identification,
for up to twelve 4-20 mA analog Temperature sensors, and for
one 4-20 mA analog or pulse-train Speed sensor.
8 relay outputs, for Temperature/Speed alarms, for a Green/
Yellow/Red Lightstack operation, and for a Horn.
Built-in Hour Meter to aid in maintenance schedules.
Minimal end-user calibration and setup, with calibration stored
in non-volatile EEPROM memory.
Easy one-button tests of systems and alarms, for simulating
temperature increases and speed decreases.
Rugged, industrial-duty systems and sensors.
Front-Panel Displays
• Twelve Temperature 3-digit LED displays, each with its own
discrete Green/Yellow/Red status LED.
• One Speed 4-digit LED display, with its own discrete Green/
Yellow/Red status LED.
• One Hour Meter 4-digit LED display, with its own discrete
Green/Yellow/Red status LED.
• One Four-digit LCD display to aid in programming UserVars
(located in lower-left-corner of Front-Panel).
Front-Panel User Interface
• Four Push-buttons for programming UserVars. The buttons are
ENTER, SHIFT-LEFT, INCRement, and DECPT.
• One Push-button for Hour_Meter_RESET.
• One Push-button for Test_Left_Side_Temperature_Rise.
• One Push-button for Test_Right_Side_Temperature_Rise.
• One Push-button for Test_Speed_Drop.
Enclosure
The enclosure is rated: NEMA 3R, NEMA 4, NEMA 4X, and
NEMA 12. Customer to cut their own conduit holes, preferably in
the bottom wall of the enclosure.
Modes of Operation:
The Electro-Sentry 1 has two modes of operation, Normal Mode
and Program Mode.
When in either mode the Front-Panel temperature and speed
displays, and their alarms are active. The presence of either
mode can be seen by looking at the small four-digit LCD display
located in the lower-left-corner of the Front-Panel, as follows.
Normal Mode
This mode is the normal operation mode, and it is to be used
when the user is NOT changing any of the UserVars.
The Normal Mode is indicated by the absence of the “VAR”
icon in the lower-left-corner of the LCD display.
Program Mode
This mode allows the user to change the UserVar variables.
The LCD display will display the name of the present active
variable (as ‘PrXX’) or its value (as ‘XXXX’).
The Program Mode is indicated by the presence of the “VAR”
icon in the lower-left-corner of the LCD display.
Entering and Using Program Mode:
Programming is accomplished by using the four pushbuttons
located in the lower left corner of the Front-Panel.
The four UserVar programming buttons are ENTer, Shift-left,
INCRement, and DECPT.
a) Press the ENTer button. The “Var” icon will display on the
LCD and the 4 digits will show “PR01”.
b) Press the INCRement button repeatedly until you get to the
variable you want to change.
c) Press the ENTer button to access that variable.
d) While in that variable you must press the INCRement button
to change the active digit (flashing digit), then press the
Shift-left button to work your way through all accessible
digits. (Not all digits are accessible in all UserVars).
e) When you are done with that variable press the ENTer button
to save that new UserVar value, and return to the ‘PrXX’ list.
f) To step to the next variable in the ‘PrXX’ list press the
INCRement button.
g) To exit the Program Mode and get back to Normal Mode,
repeatedly press the INCRement button while in the ‘PrXX’
list until the “VAR” icon disappears, or simply press the
DECPT button while in the ‘PrXX’ list to make a ‘quick-
exit’ out of Program Mode.
Note: If the user does NOT manually exit the Program
Mode, and if there is no further activity in Program
Mode for one minute, then the ES1 automatically
exits the Program Mode.
When this ‘auto-exit’ is performed, any UserVar
that was changed and accepted by pressing the
ENTER button during the present Program Mode
session will have their new value properly retained.
If the LCD screen was displaying a UserVar’s value
(and not displaying the name ‘PrXX’) at the instant
the ‘auto-exit’ was performed, then that particular
UserVar value is restored to its previous value
(and its new unsaved value is lost). This since the
user had NOT pressed the ENTER button during
the present Program Mode session to accept the
present ‘flashing’ new value of that UserVar.
Note: Electro-Sentry 1’s UserVars all have the decimal point
locked in the far right position.
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Electro-Sentry 1 Reference Manual
