Specifications

GDC-350 Operation Manual
26 5909-9000 Rev 3
4.9. LED Digital Display
The GDC-350 system allows for a
limited amount of customization of the
optional LED digital display using
jumpers J3, J4, and J5.
• The display can be switched
completely off.
• The display brightness level can
be adjusted to low or high for best
visibility in your application.
• The display can indicate the gas
type only with no numerical value
for some applications.
Figure 4-5. Jumpers J3, J4, and J5
FUNCTION
JUMPER
SETTING
Switch digital display ON J3 Bridge P2 and P3
Switch digital display OFF J3 Bridge P1 and P2
Low brightness level J4 Bridge P1 and P2
High brightness level J4 Bridge P2 and P3
Display only gas name (acronym) J5 Bridge P1 and P2
Display gas value and gas name J5 Bridge P2 and P3
NOTE: The factory default setting for detectors with an LED digital
display are:
1) Display is ON
2) Brightness level is Low
3) Display indicates gas type and gas value
NOTE: Typically the LED digital display shows the gas name for 1
second, then the gas value is shown for 2 seconds. The sequence is
the same for 1- or 2-channel systems.