Elma Instruments CM01A User Manual page 28

2. Transformer Trigger
This is used to open the jaw.
3. Function Selector Switch
This is used to select the function user desired, such as DCA, ACA,
DCV, ACV, Hz, Ohm and Continuity.
4. AC/DC Select Switch
This is used to select AC or DC voltage or current.
5. Data Hold Button
Once this button is pushed, reading shall be held on the LCD. Press
again to release it.
6. MAX/MIN Hold Button
This button is used to enable the maximum or minimum value to be
displayed and updated during measurement. Press once, minimum value
shall be display and updated. Press again, maximum value shall be
displayed and updated. Press again (the third push), clamp meter return
to normal measurement mode. Zero function will be disabled if MAX/MIN
is enabled.
7. Zero/Relative Button
Once this button is pressed, the current reading shall be set to zero and
be used as a zero reference value for all other subsequent
measurement. The function is also used to remove offset value caused
by residual magnetism remaining in the core for the DC current
measurement. The Zero/Relative function will be disabled if the
MAX/MIN button is pressed.
8. LCD
This is a 3 3/4 digit Liquid Crystal Display with maximum indication of
3999. Function symbols, units, bargraph, sign, decimal points, low
battery symbols, max/min symbols, and zero symbol are included.
9. Low Battery Symbol
When this symbol appears, it means the battery voltage drops below the
minimum required voltage. Refer to Section 5 for battery replacement.
10. Zero/Relative Symbol
When this symbol appears, it means a reference value has been
subtracted from the actual reading. The reading shown is an offset
value. Press and hold the zero button for 2 seconds to disable this
function.
11. Data Hold Symbol
Once this button is pressed, this symbol appears on LCD.
12. Bargraph
Bargraph has forty segments. It displays segments proportional to the
actual reading. Each segment represents one counts.
13. Max/Min Hold Symbol
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Elma CM-01A