Elster T-Probe Installation Instructions Manual

The Kent Range of Metering Products

T-Probe

For retro-fitting to V100 and V110 meters

INSTALLATION INSTRUCTIONS

The brass bodied V100 (Kent PSM) and some versions of the

thermoplastic V110, can be specified with the facility for a magnetically

operated (reed switch) pulsed output, by the retrofitting of a dedicated

probe assembly.

The probe is fitted with a 100Ω series resistor to protect the reed switch

from power surges and is usually provided with a 5 metre length of

cable, terminating in a sealed flying lead.

Most V100 and V110 meters have the probe location hole
in the body and a driving magnet fitted. V100 or V110
meters without this facility cannot be retro-fitted with
a T-probe.

Location and Operating Principle:

The Probe position is next to the counter, on the top shoulder of the

meter body, protected with a removable plastic cover (See ‘A’ opposite).

The volt free pulse is generated from the counter rotation, which has a

two pole circular magnet fitted to the end roller. As the magnet rotates

and opposite poles pass the reed switch, it pulls the reed contacts

together. This produces 2 pulses per revolution of the end roller.

Where there are 4 red rollers, (15mm and 20mm size), this will generate

1 Pulse / 0.5 Litre.

Where there are 3 red rollers, (25mm, 30mm and 40mm size), this will

generate 1 Pulse / 5.0 Litre.

Probe Fitting Instructions:

Remove and discard the plastic protective plug. Insert the probe into

the socket and align with screw hole.

Fit the retaining screw through the hole in the probe. (The reed switch

within the probe is self-positioning, with the screw firmly in place). (See

‘B’ opposite). To prevent unauthorised interference, the screw head can

be security lock-wired to the meter body with copper wire and a lead

seal, making the probe installation completely tamperproof.

V100 & V110 T-PROBE

INSTALLATION INSTRUCTIONS

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