Gas Detection (Australia) Pty Ltd Page 26 of 44
M-GDA-3000 Rev 1
11.
Detailed Description of Operational States and Menu
11.1. Initial State (Power On)
After wiring power terminal on main PCB has been completed, power can be applied to the
detector.
Immediately upon applying power, LCD(OLED) will indicate the messages as shown in
following figure.
Typically, after being powered up, the detector is required to have about 30 minutes to be
stabilized.
Once the detector is stabilized, it will operate in a proper manner.
After being powered up, the model name is shown in the first row of
LCD(OLED) and firmware version of transmitter in the second row
A message “Reading” will be displayed in the second row while the
firmware GSA920A is reading its version. A message will be changed
to
“Fail” if it fails in reading its version.
The detector performs self-test for 1 minute. During self-test period,
character ‘>’ indicates progress of self-test in the second line.
11.2. Gas Measuring Mode
The name of gas being measured is displayed in the first row of
LCD(OLED) and a message “WAIT” is displayed in the second row
when sensing part stays in waiting state even though the detector has
already entered normal state after completing self test. The message
“WAIT” is updated in every second.
The detector will operate as follows if it is in normal and gas measuring
state.
The name of gas being measured is shown in the first line and current
measured value and measurement unit are shown in the second line.
※
While the detector is connecting and communicating with
sensing part, “#” is indicated at the left-hand side of gas name.
※
“*” is displayed at the leftmost part of first line when the
detector is on HART or RS-485 communications.
※
When ENG. Mode is on, current temperature is displayed on
the left-hand side in the second line.
When the measured gas value exceeds 110% of preset high scale
value, a message “OVER” will be displayed in every second. In this
case, standard output will rise to 21.6mA.
