Decmetrics ASLH308 Instruction & Setup Manual

Thursday, 13 August 2015

DEC Metrics Ltd, Bronzeoak Business Centre, Bronzeoak House, Stafford Road, Caterham, Surrey, UK, CR3 6JG

Company Registration Number: 07865630 Vat Registration Number: 124 9033 33
Email: [e-mail] Web: www.decmetrics.co.uk Tel: [phone]

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DEC Metrics Ltd

Bronzeoak Business Centre

Stafford Road

Caterham

Surrey

CR3 6JG

Tel: [phone]

Email: [e-mail]

AMR Services for Renewable Metering

3. Connect the RJ11 connector to the serial

port under the yellow label on the bottom­right hand corner of the terminal block.

4. The tabs on either side of the modem should slot

into the enclosures to hold it securely in place.

ASLH308 GPRS Modem Setup Guide

The ASLH308 is designed for Elster A1140 three phase electric meters. The unit has been designed for
easy installation and can be connected to the meter whilst powered up.

Preparing the modem

1. The ASLH308 has an internal antenna. This must be bridged to the modem by joining the two

SMA connector that come from the modem.

Installing an external antenna

If using an external booster antenna, connect the SMA connector from the external antenna to the
female SMA connector on the modem. Leave the male connector disconnected as it is no longer
needed.

2. Remove the outside terminal cover from the meter to access the RJ11 serial port.

Thursday, 13 August 2015

DEC Metrics Ltd, Bronzeoak Business Centre, Bronzeoak House, Stafford Road, Caterham, Surrey, UK, CR3 6JG

Company Registration Number: 07865630 Vat Registration Number: 124 9033 33

Email: [e-mail] Web: www.decmetrics.co.uk Tel: [phone]

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4. Check the LED status indictors to make sure that the modem is operating normally and has good GSM
signal quality so that remote meter readings can be performed.

The GPRS signal quality will also scroll onto the meter’s display automatically every 10 seconds. This should
be 13 or higher. Use a booster antenna to ensure the signal quality meets this threshold.

LED Status Indicators

The ASLH308 has 3 LEDS in the lower left hand corner of the module.

LED

Purpose

Behaviour

Red

Indicates network registration
status

1. Short pulse every 3 seconds – Registered with

network

2. Flashing every second – not registered on

network. Check SIM is present and signal quality
on meter display or using an analyser.

Green

Indicates GPRS mode

1. Very rapid blinking – GPRS mode

2. Alternating between rapid flash and slow flash –

AutoRegistration mode

3. Steady flashing – CSD call in progress

4. Slow blink – CSD mode, no call in progress

Amber

Signal strength indicator

The longer the yellow led is on then the better the
GSM signal quality. Slow blink = poor signal.