Maintenance; Performing A Bump Test; Checking Response Time (T90); Create Maintenance Plan - Dräger PointGard 2000 Serie Gebrauchsanweisung

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Maintenance

Warning Cause
number
110, 111, SW dongle has
112 been removed
without being deac-
tivated.
113 Alarms inhibited.
164, 165 Sensor warm-up
phase has not
ended. Increased
measurement error
must be expected.
167, 170 Calibration interval
expired.
Negative reading.
1)
171
Value below range
minimum.
Low EC sensor
1)
163
vitality
1) PointGard 2100 EC only
PointGard 27x0 IR-specific:
Warning Cause
number
163 Sensor tempera-
ture is very high.
171 Zero drift too high.
172 PIR 7x00 optics
dirty.
182 Auto calibration not
possible with PIR
7200.
10 Maintenance
– The maintenance intervals must be established for each
individual installation. Depending on safety considerations
and application specific conditions the instrument is used
in, these might need to be shortened.
Every 6 months
– Inspection by trained service personnel.
– Check signal transmission to the central controller, LEDs
and triggering of alarm devices.
Calibrations have to be performed on a regular basis, see
8 Calibration
● To check the signal transmission to the central controller,
(see "Testing the analog interface", page 25)
● To check LEDs and triggering of alarm devices, (see
"Testing alarms/relays", page 23)

10.1 Performing a bump test

A bump test checks alarm activation without setting off the
alarms.
20
Remedy
Deactivate SW dongle.
Enable alarms
Wait until the sensor has
warmed up. Do not calibrate
before sensor is fully
warmed-up.
Recalibrate the instrument.
Recalibrate zero point.
Replace sensor
Remedy
Perform zero calibration
Clean PIR 7x00 optics.
Perform new zero and span
calibration
1. Select Settings > Instrument > Bump test and confirm.
 The maintenance symbol is displayed
 The analog output is set to the maintenance signal.
2. Apply a known concentration of gas.
3. Press OK to return to measurement.

10.1.1 Checking response time (t90)

1. Perform a bump test and check the response time.
2. Compare the response time with the t90 values that are
indicated in the corresponding sensor data sheet.
CAUTION
Delayed response time at the gas detection control unit.
If the transmitter is connected to control units, the total
response time could be delayed. The entire measuring path
must be taken into account (e. g. latency of the control unit).
► Ensure that the required response time is kept.

10.2 Create maintenance plan

The instrument has to be maintained on a regular basis by
trained service personnel. The responsible for the gas
detection system defines the preventive maintenance
intervals that should include the following tasks:
– Testing the alarm triggering of the instrument by:
– The built-in alarm devices
– The optionally connected external relays
– The optional signal transmission via the 4-20mA
interface in case of integration in an alarm
management system.
– Calibration of the sensor.
– Checking horn for cleanliness.
– Performing the inspection (recommended every 6 months)
– Cleaning the instrument using a soft cloth and water.
Detergent must not be used.

10.3 Sensor replacement

WARNING
Faulty Calibration
Faulty Calibration may cause inaccurate readings.
► If the sensor is replaced, all settings and parameters must
be checked for correctness.
► Check calibration to verify proper operation.

10.3.1 PointGard 2100 EC

Sensor lock function
If a sensor of the same type (same part number) was
previously installed, the instrument specific configuration is
retained (gas type, measuring range, test gas, calibration
interval, etc.) Otherwise the factory default settings of the new
sensor are uploaded and will overwrite the instrument specific
configuration. This can be prohibited if the sensor lock
function 26 is activated.
Instructions for use |
Dräger PointGard 2000 Series