Carel GDWBI20A00, Руководство пользователя

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17
ENG
+0300046IE - rel. 1.3 - 05.01.2022
4. CARE & MAINTENANCE
4.1 Maintenance procedure
Periodic maintenance is required on the device to ensure correct
operation. The required maintenance interval varies according to the
type of sensitive element used (semiconductor, electrochemical or
infrared). For details on the maintenance intervals, see the table in
paragraph “5.3 - Sensitive element”.
For all production lots after 1 June 2021 with a serial number greater than
21072486, the calibration certifi cate generated by the manufacturer is
supplied together with the product. This certifi cate is valid for one year
from the date of installation.
For subsequent periodic calibrations, see the chapter on maintenance
below.
Interval Function
During
commissioning Run bump test
Check that the LEDs work correctly*.
Check the correct operation of the buzzer and relay*.
Check transmission on the RS485 serial line, if connected*.
Every 6/12 mon-
ths** Inspection by trained service personnel.
Check that the LEDs work correctly*.
Check the correct operation of the buzzer and relay*.
Check transmission on the RS485 serial line, if connected*.
Calibrate the sensor or contact CAREL to replace the sensor
with another calibrated in the factory.
On request Replace the sensor module/modules.
Tab. 3.a
* The function can be activated via Modbus commands or the RILEVA app.
** Typical maintenance frequency may vary based on the type of sensor.
CAUTION: maintenance must only be carried out by qualifi ed
personnel.
CAUTION: gas detectors with a semiconductor sensitive element
must undergo a complete maintenance cycle after exposure to signifi cant
concentrations of refrigerant. Such exposures in fact reduce sensor life
and sensitivity, with the risk of erroneous measurements.
Proceed as follows for maintenance:
1.
Check operation of the LED, buzzer and relay outputs;
2. Check operation of the analogue output;
3.
Check operation of the RS485 Modbus serial connection, if featured;
4.
Calibrate the sensitive element (zero calibration and full-scale
calibration)
5. Performing the bump test.
Steps 1 and 2 can be performed from the Test tab in the RILEVA app. See
the corresponding paragraph.
Steps 4 and 5 are described in paragraph “4.2 - Calibration and bump test”.
Steps 4 and 5 can be skipped when replacing the sensitive element. See
paragraph “4.4 - Sensitive element replacement”.
4.2 Calibration and bump test
4.2.1 Bump test
The bump test checks the eff ective
response of the sensor to a real high
gas concentration.
In the bump test procedure on
the RILEVA app, all of the outputs
to external devices (RS485 serial,
analogue output and relays) can be
disabled, so as to not accidentally
activate other devices connected to
the gas detector.
If, on the other hand, the bump test
is carried out in MANUAL mode,
fi rst disable and/or mute all of
the devices connected to the gas
detector, to avoid the false alarms.
When performing the bump test:
The device goes OFFLINE.
IMPORTANT: a bump test
needs to be carried out when the
product is fi rst installed
Fig. 3.a
4.2.2 Calibration
1
2
3
4
5
Cali b ration
B
U
MP
CA
LI
BR
A
TI
ON
KIT
1. Calibration cylinder
2. Dispensing valve
3.
Flow regulator
(adjust to around 0.3 l/min)
Calibration kit P/N GDOPZK0000,
comprising:
4. Transparent rubber tube
5. Plastic cap
Fig. 4.a
The gas detector calibration procedure is mandatory and must be
carried out during maintenance (except when replacing the sensitive
element).
Annual calibration is recommended to ensure that sensor accuracy is
within 10%. If replacing the sensor with a pre-calibrated one, calibration
is not required, however the bump test does need to be carried out.
The calibration and bump test can both be carried out either manually
or using the RILEVA app. Both procedures are described below. The
calibration and bump test require:
•
A calibration kit (available for purchase, part number GDOPZK0000, not
included with the gas detectors) comprising a plastic cap and a rubber
tube;
•
A calibration cylinder, containing the specifi c type and concentration
of gas for the required application, purchased separately.
IMPORTANT: for calibration via the app, it is recommended
to disable the smartphone screen power saving for the duration of
the calibration procedure. This will avoid the risk of calibration being
interrupted and having to repeat the procedure.