122 Keysight B2980B User’s Guide, Edition 1
How to Perform Measurement
Charge Measurement
• Press the Single key to start a single (one shot) measurement. Charge
measurement is performed once.
• Press the Run/Stop key to start a repeat (continuous) measurement. Charge
measurement is performed repeatedly. Minimum measurement interval is 10
ms.
Step 10. Press the Ammeter On/Off switch to disable the coulomb meter. This turns off
the switch light.
For more precise measurement, use the zero correction or offset cancel. See “Null,
Offset Cancel” on page 210.
Setup Parameters
This section briefly describes how to set key parameters effective for accurate and
reliable charge measurement.
Automatic Discharge
The automatic discharge function is effective for preventing the coulomb meter
from range overflow. If this function is enabled, the coulomb meter resets the
charge when the charge reaches the specified level. After resetting, the charge
measurement restarts.
This function is enabled/disabled by pressing the System Menu > Config >
Measure > Coulomb > Auto Dis. function keys. This softkey label shows the present
setting ON (enable) or OFF (disable).
The discharge level can be selected from 2 nC, 20 nC, 200 nC, or 2 C by pressing
the System Menu > Config > Measure > Coulomb > Dis. Level function keys. This
softkey label shows the present setting.
Measure Coulomb
Press the RANGE function key to change the ranging mode, auto or fixed. Where,
the softkey label shows the present measurement range setting, AUTO or fixed
range value.
Measurement range can be set by using the following navigation keys.
Range + Sets the fixed range mode and changes the range up.
[home] Sets the AUTO range and the Normal auto aperture.
Range Sets the fixed range mode and changes the range down.
See “Measurement Range” on page 89 for more information.
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