Check The Gprs Communication; External Antenna - Grundfos AQtap Installation And Operating Instructions Manual

4.9 Check the GPRS communication

The SIM card will not be read by the AQtap until it
was powered off and on again.
Caution If the SIM card was replaced by a new one, the
AQtap must be restarted, see section
11.2 Restarting the AQtap.
As soon as the AQtap with a correctly placed SIM card is
powered on, it tries to connect to the GSM network automatically.
Two LEDs near the SIM card show the connection status.
• Check that the internal communication is ok:
– The lower LED is permanently green or red.
• Check that the connection to GSM network is established:
– First, the upper LED flashes yellow rapidly (1-second
intervals). Once a network has been acquired, the upper
LED flashes yellow slowly (3-second intervals). It can take
several minutes to establish the connection.
If the AQtap is registered in WMS and data transfer is ongoing,
the upper LED indicates the connection between AQtap and
WMS.
• Check that the communication status is ok, see section
4.9.1 LEDs on AQtap CIM
4.9.1 LEDs on AQtap CIM
LEDs indicate the internal and external communication status:
Fig. 2 LEDs on AQtap CIM
GSM LED of the CIM (top)
LED status Description
• No or invalid SIM card in the AQtap.
Yellow LED, flashing
with 1-second • SIM card is PIN protected
intervals
• No GSM or no GSM coverage.
• Connection to GSM network
Yellow LED, flashing
established.
with 3-second
intervals
• Normal operation.
Green LED, flashing • GPRS connection to WMS
with 3-second established. Ongoing data transfer
intervals with WMS.
• Ongoing SMS transfer with WMS.
Green LED, This is typically observed during
permanently on initial configuration / commissioning
with WMS
AQtap internal communication LED (down)
LED status Description
• AQtap has not received initial set-up
Red LED, data due to internal fault, or the
permanently on AQtap has not established a
connection to WMS.
Red LED, flashing • Cable or connector problem on the
with 1-second AQtap internal communication.
intervals
Green LED, • AQtap internal communication status
permanently on OK.
10
SIM card
GSM LED of the
CIM
AQtap internal
communication
LED
4.9.2 Abbreviations
Abbreviation Description
Communication Interface Module
CIM
(GPRS data logger)
GPRS General Packet Radio Service
GSM Global System for Mobile communications
IMEI International Mobile Equipment Identity
LED Light-Emitting Diode
SIM SIM card, Subscriber Identity Module
SMS Short Message Service
WMS Water Management System

4.10 External antenna

The signal of the internal antenna is normally strong enough to
have a stable connection to GSM. If the local conditions show
that the antenna should be placed somewhere else in order to
have a stronger signal, an external antenna can be used:
Description
Antenna for roof mounting, GSM/GRM, with
15m cable
4.10.1 Antenna installation
The internal antenna that is mounted to the top of
the cabinet must not be removed or loosened, in
Caution
order to ensure IP45 protection class.
Fig. 3 Antenna cable connection
Disconnecting internal antenna
1. Unscrew the antenna cable plug from the CIM antenna
connection.
2. Safely roll up the existing antenna cable, so it will not interfere
with anything.
– Do not remove the existing antenna, as this would destroy
the IP45 protection class of the AQtap cabinet.
Installing external antenna
1. Pull the external antenna cable through one of the smaller
(M16) cable glands of the AQtap cabinet.
2. Screw the external antenna cable plug to the CIM antenna
connection.
3. Tighten the cable gland.
4. Place and mount the external antenna at a location with good
signal strength. Refer to the instructions given in the
installation and operating instructions of the antenna.
Product No.
98518346
SIM card
antenna cable plug