• Tap the pencil icon to set a mA value.
6. Wait for the valve to move.
7. Repeat steps 5 and 6 until the valve moves through all the required positions.
8. To stop powering the device, do one of the following:
• Tap Trex Unit Power to set the option to OFF. You are prompted to select a
power option to set the position of the valve.
• Tap Exit. You are prompted to select a power option to set the position of the
valve.
• Remove the lead set from the Trex unit. You are not prompted to select a power
option to set the position of the valve.
4.10 Settings for controlling current
4.10.1 Change the values for the quick buttons
The Loop Diagnostics screen has five buttons that have default values of 4 mA, 8 mA, 12
mA, 16 mA, and 20 mA. These buttons let you quickly change the current. You can change
the value for each button.
Loop Diagnostics application User Guide
September 2021
144 User Guide
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