Commissioning - Elster A1140 User Manual

39
Operating & Maintenance Instructions
WARNING
Do not over-tighten the screws or the meter base may be damaged.
For connecting to the large diameter terminals, strip back the cable insulation by 26mm.
Fully insert cables into the terminals so that the insulation butts up into the counter-sunk recesses
in the bottom face of the terminal block.
Using a Number 2 Phillips or flat blade screwdriver, tighten the M6 terminal screws to a torque of
between 2.2N m (minimum), 2.8N m (maximum).
Auxiliary terminal connections should be completed with appropriately sized cable.
The M3 terminal screws should be tightened using a Number 1 Phillips or flat blade screwdriver
to a maximum torque of 0.45N m.
Where connections are taken from the auxiliary voltage terminals, appropriate fuses should be
incorporated to protect these circuits.
If a battery (for read without power) is installed in the module housing, the battery must be
connected before mains supplies are energised.
It is also recommended that connections to the meter's RJ11 connector are made with the meter
supplies isolated.
27

COMMISSIONING

WARNING
Commissioning must only be carried out by appropriately trained and qualified personnel.
Check that the supply rating on the meter nameplate corresponds to the system rating.
Removal of the meter cover seals will invalidate certification.
With the system de-energised, check the cable connections are secure and correct to the wiring
diagram fitted under the terminal cover
Refit and seal the terminal cover. Energise and load the system
At power-up, ensure all segments of the LCD show in the test pattern
Check that the display is cycling through the display sequence
Check that the LED test indicators are illuminated or flashing
Check the operation of the pulse output (if fitted)
Check operation of the RS232 port (if fitted)
Carry out load checks as necessary