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4. Instrument layout
1. Front panel
①
②
③
④
⑥
⑤
⑦
⑧ ⑨
Name
① LCD
LCD with backlight
Detects ambient brightness and automatically turns on/
② Illuminance sensor
off the lights.
Starts/ stops measurement. For continuous measurement,
③ Test button
press and turn the button clockwise to lock it in the
operating position.
④ Optical adapter
To connect MODEL8212USB and transmit data to a PC.
A short press (< 1 sec.) to save the measured value while
the value is being held and displayed.
⑤ MEMORY button
A long press ( 1 sec.) to read-out or delete the saved
data while the instrument is in stand-by mode.
⑥ Cursors
Alters, increase/ decrease, the user selectable values.
⑦ ESC button
Returns to the previous screen or closes the setting screen.
⑧ ENTER button
Confirms a selection.
0ΩADJ button
Turns on/ off the 0Ω ADJ function at low-resistance
（
）
measurement.
KEW3551: COMP button
⑨
* F or KEW3551: also used to turn on/ off insulation status indicator.
KEW3552/ 3552BT:
* F or KEW3552/ 3552BT: also used to make settings of each function.
SETUP button
A long press ( 1 sec.) while measuring 125 V switches a
measurement range to 100 V range; a short press (<1 sec.)
⑩ SELECT button
at voltage measurement switches the function to low-
resistance measurement.
Switches measurement functions and selects voltage for
⑪ Function switch
insulation resistance measurement.
* KEW3551 doesn t have no. ④ to ⑧ buttons.
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www.calcert.com
15
10
20
5
25
0
30
Fig.4-1
⑩
⑪
Description
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