B-70315EN/02 7.UNITS
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7.9.3.3 Operating the gas supply pressure sensor and atmospheric
pressure sensor
The sensors operate in one of four modes. In the measurement mode, a
pressure value being measured is indicated. In the initial setting mode,
basic operation is set. In the pressure setting mode, an operating
pressure is set. In the lock mode, key operation is locked. Moreover,
the sensors have a zero-clear function for canceling an initial offset
value.
Set the initial setting mode, pressure setting mode, zero-clear function,
and key lock mode in this order. For mode switching, press or hold
down the SET key as indicated below. (When the power is turned on,
the measurement mode is set.)
Measurement
mode
SET (≥ 2 seconds)
SET (≥ 4 seconds)
SET (< 2 seconds) SET
SET
SET
Note) Zero-clear operation is performed in the measurement mode.
Pressure setting mode
Initial setting mode
Key lock mode
(1) Names of Components
Fig.7.9.3.3 Details of the gas supply pressure sensor and atmospheric
pressure sensor
LED indicator section:
Indicates a measured pressure value, settings, and error code.
Switch output 1 operation indicator lamp (green LED):
Turned on when OUT1 is on.
Switch output 2 operation indicator lamp (red LED):
Turned on when OUT2 is on.
UP (
) and DOWN ( ) buttons:
Used to change the mode and settings.
SET button:
Used to change the mode and set a value finally.
The indicator section of the sensor indicates a pressure value as a
gauge pressure in MPa. If the pressure value is beyond the pressure
range, "---" appears in the LED indicator.