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C H A P T E R
Power-Up
Front Panel Controls
6
OMH-6722B
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O P E R A T I O N
2
Power-Up
Connect the main unit to an AC power source. Press the POWER switch to
supply power to the device and start the power-up sequence.
The power-up sequence takes about six seconds. Initially, all LEDs and
enunciators are illuminated and the seven-segment displays denote "8". Then, all
LEDs and the displays are turned off while the microprocessor executes a device
self-test. Should the self test fail, error message E-720 is displayed. The Meter
then loads personality and calibration data from the measurement head. The left
display indicates -6722- and the firmware version is shown on the right display. If
an error occurs while loading data, message E-711 is displayed. If an
incompatible head is connected, error message E-713 is shown. If the
measurement head is not connected the display shows "------" until a
measurement head is attached.
At power up the main unit is configured to the same state that was present when
the power was last turned off.
The OMM-6810B/OMH-6722B is intuitively operated from the front panel keypad,
indicator LEDs and dual displays. A drawing of the front panel is shown in Figure
2.1. Front panel functions which are not available with the OMH-6722B are
outlined later in this Chapter.
Refer to the OMM-6810B Instruction Manual for descriptions of each front panel
switch function.
Figure 2.1 OMM-6810B Front Panel
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