Sensor Settings

The following settings are saved to the ULTIMA X5000 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 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 Table 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.

Scroll and select Span Value.

4.

Current Span Value is displayed.

5.

Enter desired span value.

6.

Scroll and select Save.

Default and range of available span values depends on the sensor type. See Table 14 for default and range of span values.

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

Gas Table

The ULTIMA XIR PLUS combustible sensor can be calibrated to a wide range of compounds, see Appendix: Calibration Guide for Additional Gases for a list of gases, span values, and gas table values.

The XIR PLUS sensor is only performance approved for Methane and Propane.

Gas Table #	Target Gas
1	Methane
2	Propane
3	Ethane
4	Butane
5	Pentane
6	Hexane
7	Cyclopentane
8	Ethylene

Note that the Gas Table numbers listed above represent different linearity curves for infrared absorbing gases. Typically, higher Gas Table numbers represent weaker absorbing gases. Each curve represents a linearity that is applicable to a group of hydrocarbon gases and not necessarily one specific gas. The Target Gas shown is representative of a group of gases with similar linearity.

To Reset Sensor to factory default:

1.

Scroll to Settings and select it.

2.

Select Sensor.

3.

Scroll and select Reset Sensor.

4.

Select Continue.

NOTE: Sensor Reset can take 10 seconds to initiate the sensor’s countdown.

5.

Calibrate the sensor to clear Sensor Configuration Reset fault.

Disable Sensor

When removing a sensor from the transmitter while under power, the ULTIMA X5000 will enter a Sensor Missing fault condition after the two minute Swap Delay period has expired (if enabled). If Swap Delay is disabled, the transmitter will go into Sensor Missing fault immediately after removing the sensor from the transmitter. If the system is off at the time a sensor is removed, the transmitter will go into fault after its startup sequence. This fault condition can be removed by disabling the affected sensor position.

Disabling a sensor removes the fault and stops communications with the sensor, the sensor’s reading on the display is removed, and the mA channel for that sensor position is set to 0 mA. By default, the ULTIMA X5000 has the Sensor 2 position disabled. If at any time a sensor is connected to a position that is disabled, the ULTIMA X5000 will automatically enable that sensor position.

To disable the sensor after removal:

1.

Scroll to Settings and select it.

2.

Select Sensor.

3.

Scroll and select the sensor you want to disable (Sensor #1 or Sensor #2).

4.

Scroll and select Disable Sensor.

Only one sensor can be disabled at a time. The transmitter will not allow both sensor positions to be disabled simultaneously. The ULTIMA X5000 only allows a sensor to be disabled after the transmitter has gone into Sensor Missing fault.

Diffusion Supervision

Diffusion supervision actively monitors the sensor inlet for obstructions. If an obstruction is detected, the sensor will go into a fault mode to alert users and the control room that it is not capable of detecting gas due to an obstruction.. Objects residing directly on or in the sensor inlet that result in a significant impact to the gas path are very likely to be detected by Diffusion Supervision. Examples include paint, tape, water, and dirt. Small amounts of these materials can be visible on the inlet while not impacting the gas path enough to trigger a Diffusion Supervision Fault. A fault signal will only be sent out when the system determines that the amount of material that has accumulated on or inside the sensor inlet is negatively affecting the gas path.

Even if a Diffusion Supervision Fault has not been triggered, it is good practice to clear any foreign material from the sensor inlet if any is observed while inspecting the sensor.

To enable or disable Diffusion Supervision:

1.

Scroll to Settings and select it.

2.

Select Sensor.

3.

Scroll and select Diffusion Supervision.

4.

Scroll and select Enable or Disable.

5.

Scroll and select Save.