Manual

3 How to Operate 3-5. Modes
- 33 - GD-70D
<Detection mode>
Flow Rate Indicator
Because the suction flow rate of the detector is automatically adjusted by the flow rate control function, the
flow rate, in principal, does not need to be controlled. As shown on the figure below, when the flow rate does
not correspond to the specified flow rate for some reasons, it is adjusted automatically.
3-5. Modes
Details on each mode are provided as follows. (* Operations are slightly different depending on the detector
type or sensor unit.)
Mode Item LCD Display Details
Detection Mode - Gas concentration
Gas name
Normal state
Gas Alarm
Test Mode
- Gas concentration Perform the alarm test.
Zero Adjustment (Span
Adjustment)
1-1 ZERO
(1-1 SPAN)
Perform the zero adjustment.
(In case of oxygen 0 - 25 vol%, perform the span adjustment.)
Setting Display 1-2 CONFIRM Show the setting of typical menus.
• First Alarm Setpoint (AL1)
• Second Alarm Setpoint (AL2)
• Alarm delay time
•
Zero suppression value
•
Zero Follower ON/OFF
• Sensitivity Correction ON/OFF
Flow Rate Indicator 1-3 FLOW Show the current flow rate.
Address Display 1-4 ADDRESS Show the address.
Detector Version Display 1-5 70D VER Show the program version of the main unit.
Unit Version Display 1-6 UNIT VER Show the program version of the sensor unit.
Maintenance
Mode (user
mode)
Net Version Display 1-7 NET VER Show the program version of the communication function.
WARNING
• When the detector enters each mode from the detection mode while an alarm is activated, the alarm
contact is released.
CAUTION
• If the automatic flow rate adjustment does not work (due to clogged tube or leak), messages such as
"FLOW" for an unstable flow rate or "E-05" for flow rate abnormalities are displayed. In this case, you
must identify the causes and take appropriate actions.
Flow rate
Flow rate
Normal