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TXP-WTA_Instruction_Manual_(Rev1.3)
1. Access the TECHNICIANS MENU.
2. Hold the DOWN key until the table appears.
The temperature Data Points scroll by in 10-degree C increments from -40C to + 60C with each swipe of the EDIT
key.
Each Data Point has an associated Gain and Offset value. Electrochemical sensors may be less sensitive to the target
gas at lower temperatures than at higher temperatures and therefore require higher gain when cold and less gain
when hot. To accomplish this, Temp Comp Table Gain is typically 1.000 at 20C and increases gradually at the colder
Data Points and decreases at warmer. Some sensors may also have a shift in zero output at extreme temperatures.
The Offset values add or subtract in % of full scale using the following formula:
Gain (Uncomped – Offset) = Comped.
•
NOTE: The Offset values entered with a negative number add to the reading. Sensor Temp is a live readout from the
current temperature of the sensor element.
8.6 Packet Count
Packet Count appears at the bottom of the Channel 1 / 2 Menus. Packet Count is a 5-digit decimal number indicating
the number of transmissions the TXP-WTA has transmitted since the counter was last reset (up to 65,535
transmissions).
NOTE: This is a useful diagnostic tool for comparing how many times the TXP-WTA Sensor Transmitter transmits to
the number of transmissions received by controllers over a period
When the TXP-WTA Sensor Transmitter is in dual channel mode, each channel will display the number of
transmissions for that channel independently, on its respective channel menu (Figure 8-1).
To reset the TX Counter:
1. Move the cursor to the Packet Count line and select EDIT, or
2. Cycle power to the TXP-WTA Sensor Transmitter.
8.7 Sensor Temp Reading
The last item on the Channel Menus page is a live reading of the Smart Sensor Module's temperature. This reading
is used if the sensor element requires temperature compensation (see Section 8.5.6).
REV – 1.3
Figure 8-7 – Temperature Compensation Table
[34-2900-0207-4 ]
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