Fluke 1586A/2DS Product Manual - Page 74
HI and LO Channel Alarms
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3 Input and Channel Configuration Mx+B, Alarms, and Channel Options The Product uses the offset to zero a channel. To do this, the Product calculates the offset required to convert the measurement to a zero value, sets Mx+B to ON, and loads the calculated offset value into the Mx+B settings. To clear the zero, the offset value can be manually set back to the original value (usually "0") or Mx+B can be set to OFF if it was off before the channel was zeroed. See "Zero a Channel" on page 3-14 for instructions on how to zero a channel. To apply an Mx+B scaling to a channel: 1. Push . 2. Push or to highlight a channel. 3. Set the channel to ON if necessary. 4. Push to edit the channel. 5. Select Mx+B and push . 6. Input the Gain and Offset values and set the unit as desired. When complete, push to return to the previous menu. 7. Verify the channel. If the scaled channel gives unexpected results (like zero or "OL"): • Verify that the correct gain and offset values are set. • Manually calculate the result with the entered gain and offset values. See the examples in this section. • Temporarily set the gain to 1 and the offset to 0 to verify that the measurements are in the expected range. Unexpected measurements could result from a wiring error or the wrong range or function selected. HI and LO Channel Alarms Each channel has two channel alarms that can have custom values assigned to trip when a channel measurement exceeds the assigned high (HI) or low (LO) limit. If an alarm trips, the measurement value on the display changes to red and will stay red until the measurement is back in the normal range. In addition to the visual indication, the channel alarm can be tied to one of the six alarm outputs on the rear panel (see Figure 3-10 and Figure 3-11). An alarm output can have multiple channels assigned to it. If an alarm trips, the alarm outputs a low condition signal (