58 H-S81-HS Installation & Operation Manual — P/N LS10114-000HI-E:A 2/24/2015
Parts of the H-S81-HS System I/O modules
Threshold Setting
The following parameters can be set for each module through the configuration program or directly
on the control panel in the operator cycle, access level 3:
• Pre-alarm threshold.
• Alarm threshold.
• Current value below which a trouble condition is signaled
• Calibration mixture concentration value for end of scale calibration
Zero Point Calibration
Calibrate the zero point as reported below:
• Disable the channel of the module to be calibrated from the operator cycle.
• Enter the diagnosis cycle of the module to be calibrated.
• Disconnect the channel to be calibrated (1-8).
• Make sure that no gas is present near the sensor to be calibrated.
• Press the “1” key to calibrate the zero point of the channel.
• The new zero value is stored in the memory of the module.
• Press “0” to cancel the operation for the channel.
• Exit the module diagnosis cycle and enable the channel.
End of Scale Calibration
Calibrate the end of scale as follows:
• Disable the channel of the module to be calibrated from the operator cycle.
• Enter the diagnosis cycle of the module to be calibrated.
• Disconnect the channel to be calibrated (1-8).
• Apply gas to the sensor according to the percentage set during configuration.
• Wait for the gas value measured by the module to stabilize.
• Press the key “3” to calibrate the end of scale for the channel.
• Press “2” to cancel the operation for the channel.
• Exit the module diagnosis cycle and enable the channel.
Field Connections
The module can be connected to field terminal block by using a flat or a multi-conductor cable,
depending on the used bus type.
NOTE: The zero point can be calibrated only with zero values ranging between 3 and 5mA.
NOTE: The end of scale can be calibrated only if the current value measured by the module is
±3mA than the set calibration value.
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