4.4.4 Alarm Direction
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. The default alarm direction for Oxygen sensor is decreasing, or downward. The default alarm direction for all
other sensors is increasing, or upward. The alarm direction can be set to increasing/upward or decreasing/downward. Alarm direction for Oxygen sensor can be
changed through UI directly, or through Modbus/Bluetooth/HART. The alarm direction setting for all other sensors can only be changed through
Modbus/Bluetooth/HART.
4.4.5 Alarm Enable/Disable
Users can disable alarms by changing this setting. Default value is Enabled for this setting. Users can change this setting to Enabled or Disabled.
5 Calibration
Calibration is the process of applying a known quantity of gas to the transmitter so that the transmitter can adjust the precision and accuracy of the
measurements made in normal operating mode. This process ensures that gas measurements are as accurate as possible.
Calibration Warnings – Read before Calibrating
Although S5000 sensors are factory calibrated, another calibration is recommended once the unit is installed in its final environmental destination.
WARNING!
Use zero gas when zeroing the S5000 transmitter if there is any possibility of background gas. Otherwise, improper calibration could occur. Use zero gas when
zeroing IR700 sensors. Air contains CO2 and cannot be used. Nitrogen is recommended as a zero gas. Otherwise, improper calibration could occur. For optimal
sensor performance, allow sensor to acclimate to application conditions for 24 hours before performing an initial calibration. Perform calibrations 24 hours after
initial start up and at a frequency identified in 5.2 Calibration Frequency and 5.3 Calibration Frequency for XCell Sensors with TruCal (H2S & CO only) . XCell
Sensors with TruCal (CO & H2S) with Calibration Alert enabled provide an indication for “Calibration Recommended” and “Calibration Required’. When either
indication is provided by the device, calibrate the sensor.
Failure to follow this warning can result in serious personal injury or death.
5.1 Calibration Equipment
A gas cylinder with a known concentration of gas appropriate for the range of measurement is needed. Sensors come with preset span gas values appropriate
for the measurement range.
All of the calibration hardware for XCell sensors is included in a convenient calibration kit. It includes a carrying case that can fit two cylinders, a regulator, tubing,
and any other accessories required for each sensor type. The calibration kit can be ordered separately or as a single line item with the gas cylinder. See Table 16
for a complete list of calibration cylinders
and kits. The Digital Toxic, Oxygen, and Catalytic Bead sensors share the same sensor body design and use the same calibration hardware. The calibration kit
for IR400 sensors is ordered separately (P/N 1400270-2) and contains a regulator, tubing, and other calibration accessories specific to the IR400. The calibration
kit for IR700 sensors is P/N 31478-1.
Passive sensors use different calibration hardware to accommodate the different sized sensor housing. Passive MOS sensors can be calibrated with either
calibration gas cylinders or ampules. See Table 16 for P/N details.
The sensor guard and rubber calibration cap should be removed after calibration.
Table 16 Calibration Kits
To Next Page
Loading...
Need help?
General