Johnson Controls GS3000, Руководство по установке, Страница: 7 / 18

Strobe alarm
The strobe alarm defaults to a 150 ppm CO trip point and
5 min delay time and you can program the strobe alarm in
a similar manner to the buzzer alarm. When the trip point
is exceeded for a time longer than the delay time, the
strobe LED flashes until the CO level falls below the trip
point. The strobe LED operates independently of Alarm 1
and Alarm 2 and you can disable the strobe LED through
the Menu. If enabled, and the device is in Alarm mode,
pressing the TEST switch has no impact on the strobe
alarm.
Manual alarm reset
The alarms activate the same way as the automatic alarms
but do not automatically reset to Normal Mode when the
CO level drops below the trip level or hysteresis value.
To reset the alarms to Normal Mode, you must press the
TEST switch on the front cover, or activate the remote
TEST input. If the CO level is below the alarm level and
you press the TEST switch, the alarms returns to Normal
Mode.
The manual reset also applies to the buzzer alarm. If the
buzzer alarm is active, press the TEST switch to silence
the buzzer. If the buzzer alarm is active but the CO level
reduces below the trip point, you must press the TEST
switch to reset the buzzer alarm to Normal Mode.
Test mode operation
The Test Mode function is disabled by default, and you
enable Test Mode through the Menu to operate. To
initiate the test function during normal operation, either
press and hold the TEST switch on the front cover for 1 s
or activate the test function remotely by shorting the TEST
to COM. This causes the status LED to blink red, all analog
outputs to go to 100%, and both alarms to activate. The
buzzer also beeps once every 15 s if enabled, and the LCD
indicates the Test Mode and the remaining time.
The test function continues for 5 min, the default time,
and the device resets to normal operation. Press the
TEST switch a second time to cancel the test function. You
cannot activate Test Mode if the device is in fault, alarm,
or recalibration modes of operation, it only activates in
Normal Mode. The test function can verify the output and
alarm relay operation and you can program the test time
through the Menu. The Test Mode display shows even if
the LCD mode is set to OFF.
Figure 21: Test mode
Fault mode operation
The Fault Mode function is disabled by default, and you
enable Fault Mode through the Menu to operate. The
fault function monitors the CO and NO
2
sensor lifetime
and indicates when you should replace either sensor. The
device enters Fault Mode if it determines that the sensor
is at end-of-life (EOL) and that a replacement is necessary.
This causes the status LED to blink red and the buzzer
to beep once every 10 min. The LCD periodically shows
Sensor Fault .
You can disable the Fault Mode through the Menu or
enable the Fault Mode at any time. If you enable Fault
Mode, press the TEST switch to silence the buzzer due
to the fault alarm only. Buzzer silence due to the fault
alarm holds until you reset the fault condition through
the Menu. The buzzer may still activate due to a setpoint
alarm if enabled. The Fault Mode display shows even if the
LCD mode is set to OFF.
Figure 22: Fault mode
Setup menu operation
About this task:
The device has several parameters that you configure
locally through the setup Menu using the keypad and
LCD. All parameters have default values but the installer
may want to change certain values. In certain cases, such
as the device network address, the installer must change
the settings before operation. Any changes made save in
non-volatile memory and restore in case of a power loss.
Only the Menu items relevant to the device model show.
You can access the Menu at any time after the warm-up
mode and, if there is 5 min of inactivity, the Menu closes,
and normal operation continues. The Menu has several
items as shown in Table 2. The first column shows what
displays on the LCD, including the default value.
Note: The TEST switch has no effect when the setup
Menu is in use.
To set up the device parameters, complete the
following steps:
1. To enter the first step of the Setup Menu, press and
release the MENU button.
2. Press the MENU button a second time to save the
setting and advance to the next step. Each time
you press MENU , the current setting saves and
advances to the next menu item.
3. Press the UP or DOWN buttons to scroll through
the available options to make changes to program
variables. Hold the UP or DOWN button to scroll
through certain options at a faster rate.
4. To access the keys, open the cover. The marked
keys are on the printed circuit board (PCB).
5. Press the MENU button to save the setting to
memory and advance to the next menu item.
GS3000 Gas Detection Sensor Series Installation Guide 7