Turning The Loggers On And Off; Logger Display And Buttons - Omega Engineering OM-70 Series User Manual

The loggers feature a display that allows the user to see the current reading and the reading values stored in the unit's
memory. The display also shows the current date and time, the battery level, whether or not the device is collecting
data and the alarm condition. The OM-73 display alternates between temperature and humidity.
The OM-71 and OM-73 sensors are open to the air. It is therefore important to ensure that water does not get into
the unit. This is especially important in high humidity situations (90% RH and above) where water may condense
inside the logger, causing damage to the internal electronics.
The OM-72 sensor is condensation resistant, but should not be submerged in liquid for an extended period of time.

Turning the Loggers On and Off

To conserve battery life, when the unit is not logging and no buttons are pressed, the logger will turn itself Off after
about 1 hour of operation. The display will go blank and the unit will enter a power save mode. In this mode the
logger uses practically no power, and the battery will last as long as its rated shelf life (typically 6 to 10 years).
To turn the logger On at any time, just press any of the logger's buttons. The display will come back On and the
logger will operate normally.

Logger Display and Buttons

The logger display shows the current reading, the current time, the battery level, and the logging state of the device.
The OM-73 alternates the display between temperature and humidity every two seconds. The previously recorded
samples, stored in logger memory, can also be displayed by using the Back and Forward buttons.
Note: When scrolling through the recorded data, the OM-73 will not alternate the reading between temperature
and humidity. To switch the history display between temperature and humidity, use the Units button.
The current time in hours and minutes, and the current date, is shown in the lower portion of the display. The time
display is blank when the logger's internal real time clock is not running. This happens when the logger comes out
of Power Down mode. When the current time is shown, the hours and minute separator,
You can browse through the samples logged in the device memory using the Back and Forward buttons. When
browsing past samples, the time and date display show when the sample was taken. The temperature and/or
humidity display shows the recorded value at that time. The hours and minutes separator,
mode.
The logger will automatically exit the browse mode when the browsing goes passed the last sample recorded.
Note: To exit the browse mode quickly, press and hold the Start button for about 3 seconds. The hours and minutes
:
separator, , will start blinking after exiting the browse mode.
The display also shows if the logger is logging, or waiting to log, as follows:
•
Logging: The
•
Logging will start when the Start button is held: The
•
Logging will start at a specific time: The
when the logging will start.
The icon is On when the recorded temperature and/or humidity has passed the user selected alarm
thresholds anytime during logging. This is a "sticky" icon in that it does not go away when the reading returns to
normal. The
icon is displayed continuously.
icon remains On even after logging is finished.
icon flashes.
icon and the time display flashes. The time display indicates
14
:
, will blink once a second.
:
, will not blink in this