rtd DM6210, Руководство пользователя

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1-8
Gx, Resistor Configurable Gain
The DM6210 has a resistor configurable gain circuitry, Gx, so that you can easily configure special gain
settings for a specific application. Note that when you use this feature, all of the input channels will operate
only at your custom gain setting. Gx is derived by adding resistors R14 and R15, trimpot TR3, and capacitor
C31, all located in the upper right area of the module. The resistors and trimpot combine to set the gain, as
shown in the formula in Figure 1-7. Capacitor C31 is provided so that you can add low-pass filtering in the
gain circuit. If your input signal is a slowly changing one and you do not need to measure it at a higher rate,
you may want to add a capacitor at C31 in order to reduce the input frequency range and in turn reduce the
noise on your input signal. The formula for setting the frequency is given in the diagram. Figure 1-7 shows
how the Gx circuitry is configured.
As shown in Figure 1-7, a solder short must be removed from the module to activate the Gx circuitry. This
short is located on the bottom side of the module labled JS2. Figure 1-8 shows the location of the solder short.