User Manual
2253i / 2253iX
AMETEK
California Instruments
150
15. Option –WHM: Watt Hour Meter measurements
The WHM measurement function can be accessed from the APPLICATIONS screen. Note that the -
WHM option is required for watt-hour measurements. If the –WHM is not installed (refer to the
OPTIONS menu), the watt-hour screen in the APPLICATIONS menu will be inactive.
To start watt-hour measurement, program the required output parameters of the power source and
apply the load. The output relay must be closed. From the APPLICATIONS menu, scroll down to the
WHM entry and press the Enter Key.
This will display the screen shown below. Scroll down using the down arrow key to select the elapsed
time screen.
The following fields are available:
WHM STATE: Select this field and press the ENTER key to toggle the watt-hour measurement mode
ON or OFF. This will start and stop the watt-hour measurements.
WATT HR: This field displays the watt-hour measurement readout.
ETIME: This field will accumulate the time in hours, minutes and seconds.
PREVIOUS SCREEN: Returns to the APPLICATIONS screen.
Note
: Changing from ON to OFF will stop the measurement and will maintain the last data record for
the watt-hour meter. To restart the measurements, the field is toggled to the OFF position from the
ON position and the previous data will be reset to zeros.
