Extended Functionality Modes - FLIR CM174 User Manual

5.4.4 Extended Functionality Modes

In addition to the basic measurements that the CM174 can perform, a variety of
extended functions are included. Refer to the following sections for details.
5.4.4.1 Inrush Current Mode
In Inrush current mode, the meter displays the AC RMS current reading in the first
100ms period after the trigger point (current detection threshold) is reached, see Fig.
5.3 below. The current detection threshold is 0.5A for the 60.00A range and 5.0A for
the 600.0A range. Inrush current mode is available when measuring AC current.
1. Connect the meter to the unpowered circuit under test
2. Set the meter to A
3. Press the Inrush button
display icon will appear on the LCD.
4. Turn on the power to the circuit under test
5. When the threshold is reached, the meter will display the RMS reading for the
100ms integration time.
5.4.4.2 DCA Zero Mode
The DC zero feature removes offset values and improves DC Current accuracy.
1. Set the meter to measure DCA. Ensure that there is no conductor in the clamp
jaws.
2. Press the DCA Zero button
3. Take DC current measurements as explained in the Current Measurements
section.
FLIR CM174 USER MANUAL
to enable the Inrush current mode. The Inrush
Figure 5.3 Inrush Current
to enable DC Zero. The display will zero.
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Document Identifier: CM174-en-US_AC