18
Instructions for use
|
Dräger PointGard 2000 Series
en
|
Troubleshooting
central device. In case of substances with particularly low
calibration factors and/or manual configuration of a high span
calibration factor at the sensor, this may already happen at
concentrations below 100 %LEL. For substitute gas
calibrations, correct triggering of the alarm should therefore
be checked with a test gas concentration corresponding to the
alarm threshold. If necessary, the measuring range which can
be represented can be increased as required by a reduction
of the sensor output signal (see DSIR Instructions for Use,
part number 9023981) and subsequent calibration at the
instrument.
8.5.1 Performing span calibration
Calibration can be aborted at any time. To abort calibration
select
back
.
Prerequisites:
– Zero-point is calibrated.
– Calibration is prepared.
– PointGard 2200 CAT / 2200 CAT Remote IR / 2700 IR -
specific: Zero calibration was performed within 24 h before
starting span calibration.
Perform span calibration
1. Select
Calibration
>
Span calibration
and confirm.
The Maintenance signal is transmitted by the analog
interface, no alarm or fault relays are switched and the
symbol is
displayed.
The parameters for the calibration gas are displayed,
e. g.:
1)
Gas :
H
2
S
Unit
: ppm
Concentr.:
25
2. If the displayed parameters do not match the target gas,
adjust the parameters:
a. Select
Gas
and confirm.
b. Select the calibration gas from the list and confirm.
c. Select
Unit
and confirm.
d. Select the unit of measurement from the list and
confirm.
e. Select
Conc.
and confirm.
f. Set the concentration of the calibration gas.
3. If settings are correct:
a. Select
Next
and confirm.
A message like
Gas flow ON H
2
S
is displayed.
4. Apply calibration gas.
a. Set gas flow corresponding to the sensor used (see
"Gas flow for calibrations", page 17)
5. Select
Next
and confirm.
The current value is displayed
After the test gas has been applied to the sensor for 3
minutes and the displayed value is stable perform
calibration
2)
:
6. Select
Next
and confirm.
The message
please wait...
is displayed.
The new current value is displayed.
7. Select
Next
and confirm.
8. Turn off gas flow and remove the calibration adapter from
the sensor or disconnect tubing.
If the current value is not within the alarm range:
9. Select
Next
and confirm.
The instrument returns to the calibration menu.
8.6 Automatic
calibration
For further information and configurations, consult the
technical manual 9300148.
9 Troubleshooting
If the display is not working properly, have the instrument
checked by Dräger.
If the instrument does not switch on, check for faulty power
supply.
– Wiring of the power supply cable
– Condition of the fuse. When faulty, replace the fuse.
If the instrument is still not switching on, have the instrument
checked by Dräger.
9.1 Changing
the
fuse
1. Open the instrument.
2. Pull off the black fuse cover (14, 17 respectively)
3. Replace the old fuse with a new one. For properties of
fuses see 17.3 Power supply.
4. Close the instrument.
5. Commission the instrument.
9.2 Faults
1) Not applicable for all sensors (see "Display, analog interface and relay
2) For LC sensors the test gas must be applied for at least 6 minutes.
Fault
number
Cause
Remedy
001,
003 - 005,
011 - 014,
020 - 024,
043, 060,
067
Serious instrument
fault, various
causes.
Have the instrument
checked by DrägerService.
002,
025 - 027,
030 - 034,
041, 042,
044, 050,
052, 081,
085
Serious data error
in the instrument,
various causes.
Reset the instrument to fac-
tory default settings. If this
fault occurs again: Have
the instrument checked by
DrägerService.
010
4 to 20 mA inter-
face cable not con-
nected.
Check the 4 to 20 mA inter-
face connection.
