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I N S T A L L A T I O N I N S T R U C T I O N S
The Kent Range of Metering Products
T-Probe
For retro-fitting to V100 and V110 meters
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.
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.
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Summary of Contents for Elster T-Probe
- Page 1 V100 or V110 meters without this facility cannot be retro-fitted with a T-probe. 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.
- Page 2 V100 & V110 T-PROBE I N S T A L L A T I O N I N S T R U C T I O N S 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’...
- Page 3 Cable Identification and Wiring Details: The factory fitted cable used for the T-Probe is defined as 4 x 7 / 0.2mm with Red, Blue, Black and Yellow as the core colours, contained within a white outer sheath.
- Page 4 For ‘TL2’ variant, the RED and BLUE cores are the volt free pair. The loop-back is across the BLACK and YELLOW cores. These connections are not otherwise polarity sensitive. Note: The reed switch assembly is rated at 50 Vdc maximum working. The duty cycle of the switch closure is typically 70% on, 30% off.
- Page 5 Continued from page 4 2. It is important that the products concerned should be installed, handled, transported, commissioned and maintained by, or under the supervision of, competent persons in accordance with good engineering practice and: ● IEE Regulations for the electrical equipment of buildings. ●...
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Questions and answers
How do you get on when the meter is installed three feet down in a medium chamber and situated horizontally, I have found it is difficult to remove the Bing and to get the probe in can problematic, but the retaining screw is very difficult to locate and tighten up, any ideas to make it easier
To install the T-Probe for the Elster meter in a medium chamber three feet down, follow these steps:
1. Access the Meter: Use appropriate tools such as an extension rod or suitable access equipment to reach the probe location in the chamber.
2. Fit the Retaining Screw: Insert the retaining screw through the hole in the probe. The reed switch inside the probe is self-positioning when the screw is firmly in place.
3. Secure the Probe: To prevent tampering, the screw head can be lock-wired to the meter body using copper wire and a lead seal.
4. Wiring the Probe: Identify the factory-fitted cable (4 x 7/0.2mm) with core colors Red, Blue, Black, and Yellow. Follow the correct wiring variant:
- For TL1 Variant: Black and Yellow cores form the volt-free pair, and the loop-back is across Red and Yellow. The Blue core can be discarded.
- For TL2 Variant: Red and Blue cores are used.
5. Final Checks: Ensure the probe is securely fitted, wiring is correct, and the installation is tamperproof.
Using an appropriate tool for handling components at depth will make installation easier.
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