Sensor Settings

The following settings are saved to the TG5000 so that if the sensor is replaced with the same sensor type (gas and range), the settings will remain the same. If a different sensor type and range is used to replace the previous sensor, the new sensor’s default settings will upload to the device.

To change sensor settings

1. Scroll to Settings and select it.
2. Select Sensor.
3. Select an option to enter the menu.

Alarm Set Points

There are two configurable alarm set points for each sensor. Alarm set point maxima are limited

to the full-scale range of the sensor. Alarm minima are listed in Tab. 14.

To change alarm set points:

1. Scroll to Settings and select it.
2. Select Sensor.
3. Select Alarm Setup.
4. Select Alarm Set Points.
5. Enter desired alarm set point (this will be limited by sensor range).
6. Scroll and select Save.

Alarm Actions

Relays can be triggered by an alarm threshold as gas readings increase or decrease. Most applications require increasing alarm thresholds, except for Oxygen monitoring, which is most often a decreasing alarm.

Relays can also be triggered such that the relays are latched in the alarm state until a user acknowledges the alarm by placing one finger over each of the EZ touch buttons and holding for 1 second before releasing. If the alarm relay state is chosen to be Non-Latching, the relay will reset once the alarm condition (gas value) returns to a value outside of the alarming condition.

A user can also disable alarms in the Alarm Actions menu.

To change alarm actions:

1. Scroll to Settings and select it.
2. Select Sensor.
3. Select Alarm Setup.
4. Scroll and select Alarm Actions
5. Select Sensor 1 or Sensor 2.
6. Select Alarm 1 Actions or Alarm 2 Actions.
7. Select Disabled, Increasing/Non-Latching, Increasing/Latching, Decreasing/Non-Latching, or Decreasing/Latching
8. Scroll and select Save.

Span Value

The span value is used to set the calibration point. The default span values are approximately half of the total range of the sensor as purchased (see Tab. 14). If the range is changed, the span value should also be changed to increase accuracy over the full-scale range.

Before changing the span value, the user should ensure that the appropriate concentration of calibration gas is available. The concentration of the calibration gas should match the span value, except if using propane to calibrate a combustible sensor to a different gas cross reference value.

To change the span value:

1. Scroll to Settings and select it.
2. Select Sensor.
3. Select Span Value.
4. Select Alarm Set Points.
5. Current Span Value is displayed.
6. Enter desired span value.
7. Scroll and select Save.

NOTE: Default and range of available span values depends on the sensor type. See for default and range of span values.

Sensor Range

All XCell sensors have adjustable sensor ranges. The sensor range cannot be set below the current alarm set points. The user may need to first lower alarm set points and/or span value in order to adjust sensor range to desired level. The user should also consider adjusting the span value to accommodate the changed sensor range so that the span is in the center of the range.

To change the sensor range:

1. Scroll to Settings and select it.
2. Select Sensor.
3. Scroll and select Sensor Range.
4. Current Sensor Range is displayed.
5. Enter desired sensor range.
6. Scroll and select Save.

NOTE: Changing the sensor range will change the analog output values for alarm levels.