FLIR DM93, User Manual

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5 Operation
5.11.6 Relative mode
In Relative mode, the difference (Δ) between the current reading and a stored
reference value is displayed in the main display. The reference value is displayed
in the secondary display.
1. Use the selector pad to select and enable Relative mode. (The refer-
ence value is stored when the button is pressed.)
5.11.7 dBm mode (ACV only)
The decibel (dB) is a logarithmic unit that expresses the magnitude of a physical
quantity relative to a specified or implied reference level. In dBm mode, the meter
displays AC voltage measurements in dB or dBm on the secondary display.
dB and dBm are defined as follows:
• dB = 20 log ( V
AC
/1).
• dBm = 20 log ( V
AC
/0.7746).
1. Use the selector pad to select and enable dBm mode.
2. Press the or button to toggle between the display of dB and dBm.
5.11.8 Data logging mode
The meter has 99 memory locations for the storage of measurement data.
1. Use the selector pad to select and enable Data logging mode.
2. Press the or button cycle through the mode options SAVE , LOAD , and
CLEAR shown on the secondary display.
3. Press the button to activate the displayed option:
• SAVE : The data on the main display is saved to the memory location
shown by the indicator in the upper part of the display.
• LOAD : The data stored in the memory location shown by the indica-
tor is displayed. Use the or button to change the memory location.
Press the button to exit the load function.
• CLEAR : The data in all memory locations is cleared.
#T559824; r.8007/8011; en-US 20
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