Configuring Alarms; Testing Alarms/Relays; Deactivating Dongles; Display Settings - Dräger PointGard 2000 Série Mode D'emploi

2. Select Enable or Disable and confirm.

11.8.2 Configuring alarms

1. Select Settings > Instrument > Alarm > Alarm A1 or
Alarm A2 and confirm.
The current alarm threshold is displayed.
2. Apply settings and confirm the configuration steps
successively with Next.
a. Set value for alarm threshold.
b. Set alarm direction.
Rising The alarm direction is called rising, if the
gas concentration has to exceed a certain
value to activate an alarm.
Falling The alarm direction is called falling, if the
gas concentration has to fall below a certain
value to activate an alarm.
c. Set latching mode.
Latching Once the alarm threshold is reached, the
instrument will trigger the alarm. It will
remain in alarm status even if the gas con-
centration does not meet the alarm condi-
tion any more. To clear a latching alarm it
has to be acknowledged.
Non-latching The alarm status clears if the gas concen-
tration does not meet the alarm condition
anymore.
d. Set acknowledgement mode.
Acknowledge- Alarm relay and LED can be reset before
able alarm condition clears.
Non-acknowl- Alarm relay and LED can not be reset until
edgeable the alarm condition clears.
Pre-Acknowl- Alarm status is acknowledgeable before the
edgeable alarm condition clears. However, the alarm
relay and LED stay active until the alarm
condition clears.
e. Set the hysteresis mode.
The hysteresis function defines an interval where a
triggered relay maintains its status until the gas
concentration is outside the defined interval. Example:
Alarm threshold is set to 40 ppm and hysteresis to
3 ppm The alarm stays active until the value falls
below 37 ppm. This prevents relays from chattering at
an alarm threshold.
 A confirmation screen shows all settings.
f. Select Confirm and confirm with OK.
✓ The new settings are saved.
Instructions for use |
Dräger PointGard 2000 Series

11.9 Testing alarms/relays

These functions change the status of a relay and LED for test
purposes (e.g. to check the function of alarm devices
connected to the relay) and the symbol
exiting this function, the status of the relay and LED will
automatically return to their previous status.
1. Select Settings > Instrument > Alarm the desired alarm
condition and confirm.
Set Alarm A1 Simulates pre-alarm
Set alarm A2 Simulates main alarm
Set fault Simulates fault signal
2. Select Enable or Disable and confirm.
✓ If the function is activated, the fault relay is de-energized
and the 4 to 20 mA interface is set to the fault current. The
yellow LED is lit, the symbol for maintenance is shown.

11.10 Deactivating dongles

PointGard 2100 EC-specific:
This function deactivates a SW dongle to safely remove the
dongle or if the dongle is faulty.
A dongle can only be reactivated by cycling the power to the
instrument.
1. Select Settings > Instrument > SW dongle and the
dongle to be deactivated and confirm.
2. Select Deactivation func. The selected dongle is
deactivated.

11.11 Display settings

11.11.1 Changing the backlight color of the
display
The backlight color can be switched to red or green.
1. Loosen the screws (2) and open the cover.
2. Toggle the switch (13) to the desired position.
left
right
3. Close cover and tighten screws (2) with correct torque (22
Lbs. In. / 2.5 Nm).

11.11.2 Changing the display contrast

1. Select Settings > Instrument > Display > Display
contrast and confirm.
2. Change the contrast and confirm.

11.11.3 Changing the display mode

1. Select Settings > Instrument > Display > Display mode
and confirm.
2. Select the desired mode and confirm.
Standard
|
Instrument settings
is displayed. After
backlight color red
backlight color green
Shows the standard display.
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