GW Instek GCM-407, User Manual

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GCM-407 User Manual GCM-407 User Manual
VII. Key Functions
1. SELECT
Tap the SELECT key to select measurement
modes.
2. HOLD
Press the HOLD key to enter the data hold
measurement mode. Press the key again to exit
this mode.
Long-press the HOLD key to turn the backlight
on. If the HOLD key is long-pressed again within
15 seconds, the backlight will be turned back off.
The backlight will automatically turn off after 15
seconds.
3. MAX/MIN
Pressing the MAX/MIN key will toggle the
measurement between the maximum and
minimum measurement mode. “MAX” or “MIN”
will be displayed on the LCD when in the
maximum or minimum measurement mode. This
measurement mode is applicable for AC voltage,
AC current and resistance measurements.
Long-press the MAX/MIN key to exit from
maximum/minimum measurement.
4. REL
Pressing the REL key enters the relative
measurement mode. In the relative measure-
ment mode the main display will show the
measured value minus the reference value. The
reference value is obtained from the current
measurement when the REL key is pressed. This
function is only applicable for AC voltage, AC
current, resistance and capacitance measure-
ment. Press the REL key again to exit the
relative measurement mode. The LCD will
display “∆” when in this mode.
5. FLASHLIGHT
Long-press this key to turn the flashlight function
on.
Press the this key to turn the flashlight function
off.
VIII Technical Indicators
1. General Specifications
Liquid crystal display:
Displays 6000 counts
maximum.
Polarity display: Automatic positive and negative
polarity display.
Overload display: “OL”, “-OL”.
Low voltage display: “Figure 2” indicates that the
battery voltage is lower than the working voltage,
indicating that the battery should be replaced.
Sampling rate: Approximately 3 samples/sec.
Sensor type:
Coil induction.
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