Riken Keiki GD-3EC, Technical Manual

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6. Alarm Activation 6-4 External output operation
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CAUTION
<With analog transmission (4 - 20 mA)>

The 4 - 20 mA output is already adjusted. If the full scale is exceeded, the output will not exceed 20.5 mA.

If the inhibit function is enabled or initialization is underway, the output follows the 4 - 20 mA output setting
in maintenance mode. Note that the output may become low (e.g., 2.5 mA during initialization) when
using ESF (detection target gas: oxygen). Special care is required when starting the product or after
altering specifications.

Make sure you fully understand the operation details and take appropriate precautions where necessary
(e.g., setting to skip state) to prevent false alarms on the receiving side.

Particular care is required in the following situations:
Examples where care is required
Analog transmission
4 - 20 mA specifications
Using ESF (detection target gas: oxygen)
(L-LL, L-H)
A false alarm may occur upstream (L alarm) if
2.5 mA is output in maintenance mode or if the
inhibit function is enabled.
Changed to ESF specifications
(detection target gas: oxygen 0 - 25 vol%)
If changed from another principle (H-HH), 4 mA
(equivalent to zero concentration) is output until the
change is confirmed (until [C-02] is displayed).
Changed from ESF specifications
(detection target gas: oxygen 0 - 25 vol%)
If changed from 0 to 25 vol% (L-LL, L-H), 17.4 mA
(equivalent to approximately 84 %FS) is output until
the change is confirmed (until [C-02] is displayed).