Liebert EM User Manual

The Sensors tab provides access to sensor-related data and settings, including:

• Setting thresholds that will trigger alerts for each sensor (see 5.3.1 - Configure Sensors)
• Creating display names for any sensor (see 5.3.2 - Create or Change Sensor Names)
• Viewing graphs of sensor readings and thresholds (see 5.3.3 - View Sensor Graphs)

The Sensor Data window allows you to set the high and low limits that will trigger alarms for any 

sensor. You also may specify rearm and calibration values for some sensors.
To access the Sensor Data window, log in (see 5.1 - Open the Web Interface and Log In) and:
1. Click on the Sensors tab at the top of the Web interface, as shown below.

2. Select a sensor from either of the two lists on the left side of the window:

a. To configure a sensor that is connected to the unit, click on a link in the connected sensors 

list. This list displays only sensors that are connected to the Sensor ports. 

b. To configure sensors that are not connected to the unit, click on the Down arrow to the right of 

the drop-down list and select a name from the list. This list includes all sensors the unit can 

recognize, allowing you to configure sensors even when they are not connected.

3. The right side of the window displays identifying information for the selected sensor, along with 

color-coded text showing its most recent status and current reading. See Table 10 for details.

4. Set the sensor’s thresholds that will trigger alerts, as described in 4.4 - Thresholds in the Web 

Interface. Depending on the type of sensor:
a. For a temperature or humidity sensor, use the Critical and Warning text boxes to set high and 

low thresholds.

b. For a dry-contact sensor, click in the Normal State box and select Normally Open or 

Normally Closed to define the sensor’s normal state.

5. If the sensor has a Rearm box, you may enter a value to define how much the sensor’s reading 

must change beyond the threshold in either direction before its state is changed. This feature 

prevents the unit from generating excessive alerts if a sensor’s value repeatedly moves slightly 

above or below a threshold. 

6. If the sensor has a Calibration box, you may enter a value to be added to the sensor reading to 

create an adjusted reading. For example, if you set the Calibration to -2 for a temperature sensor, 

a reading of 85°F will be adjusted to 83°F. Valid entries are integers ranging from -10 to 10.

7. At any time, click on the Refresh button to update the sensor’s Status and Current Value.
8. Click on the Apply button to keep your changes. (Or click Reset to cancel the changes.)

3. View selected 

1. Sensors tab

7. Refresh 

a. Critical & Warning

b.Normal State

5. Rearm

6. Calibration

a. Connected

b. Drop-down 

2. Select a sensor

Section 5.3.3)

4. Set thresholds: