The “RAN” key is an automatic/manual range switch key, which acts in a trigger mode.
When the meter is turned on or the rotary switch is turned, the preset range is auto range.
Click the “RAN” key to switch to manual range. In the manual range mode, each time
you press this key, you will jump one level up, and when you reach the highest level, press
this key again to jump to the lowest level, cycling in turn. Manual range is not set for
frequency and capacitance measurement. If you press the “RAN” key for more than 2
seconds or the rotary switch is switched, the manual range state will be exited.
In the resistance mode, press the“SEL” key to cycle through the four levels of resis-
tance, diode, continuity detection, and capacitance.
In the voltage mode, press the“SEL” key to switch between DC and AC.
In the temperature mode, press the “SEL”key to switch between ℃ and ℉.
The “REL” key is a relative value measurement key, which acts in a trigger mode.
When this key is touched, it enters the relative value measurement mode. The current
displayed value is stored in the memory as a reference value. In future measurement,
the displayed value is the difference between the input value minus the reference
value.
That is, REL△ (current reading) = input value - reference value.
Relative value measurement can only be performed within a certain range, that is to
say, this function is only available in manual measurement mode.
In the process of measurement, if the ambient light is too dark, which makes reading
difficulties, you can press the “ ”key for more than 2 seconds to turn on the
backlight, and it will automatically shut down in about 30 seconds.
After the backlight is turned on, press and hold the “ ” key for more than 2
seconds to turn it off.
In the Current range, the instrument will turn on the clamp head lighting while turning
on the backlight. The luminous body of the backlight is LED, and its working current is
relatively large. Although the meter is set to turn off regularly (the timing time is about
30 seconds), frequent use of the backlight will shorten the battery life. Therefore, in
unnecessary cases, the use of backlight should be minimized.
4. RAN Measurement
5. Function Exchange
6. REL Measurement
7. Backlight and Clamp Head Lighting
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