RKI Instruments GD-K71D - Manual (Page 40)

PT2E-1052
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Flowmonitor
Gas sample flow rate supplied to the sensor is indicated. The standard flow rate of this
detector is 500cc/min.
Low flow alarm
When the sample flow rate to the sensor is dropped, this is the function to give an alarm.
PW/TR light flashes and “E-05” is shown on LCD.
External output signal
The external output signals of this detector head are as follows;
・Gas concentration signal output, status signal(working condition): Electric current signal
・Alarm contact output (1st, 2nd, trouble)
External dust filter
When use it at dusty atmospheric place, it is recommended to put on dust filter outside.
The kind of filter is different by the detection gas. Please ask to our nearest agent.
Auto sensor keeper
The electrochemical sensor to be used with this detector requires an electric potential
even if it is not in use. This is a function to supply electric potential to the sensor when it
is not in use or power suspension.
PPM
This is the gas concentration showing a volume at a part per million.
Calibration
By using calibration gas etc, it seeks relations between instrument reading, display value or
set value and true value.
Maintenance mode
When make maintenance of detector, cut off the alarm contact and the output of signal
showing the maintenance mode condition is displayed on the external output signal.
By this, the maintenance is carried out independently on this detector.
Press MODE switch for above 3 seconds, and the maintenance mode starts.
Initial clear
The reading will be unstable for a few seconds after power on. In this moment to
prevent the error of running, the alarm contact shall be cut off. Then, signal output
showing initial clear condition is given on external output.
９. DEFINITION OF TERMS