MARTINDALE ELECTRIC EZ150 (01) PDF MANUAL

MARTINDALE ELECTRIC EZ150 (01) PDF SUMMARY:

How do I use the E-Ze Check™ Xtra?

Ensure you have read the precautions before proceeding and have tested the unit in a known correctly wired socket or fitting if using the professional kit. Plug the E-Ze Check™ Xtra EZ150 into the socket to be tested. If you are using the E-Ze Check™ Xtra EZ650 with TL88 leads to test wiring, connect the green clip to earth, black to neutral and red to live in that order and then plug the TL88 lead into the E-Ze Check™ Xtra IEC inlet socket. Verify that the E-Ze Check™ Xtra performs its self-test routine correctly, then simply compare the status of the flashing indicators with figures 1 & 2 referring also to sections 3.3.1 and 3.3.2.

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What does it mean if the E-Ze Check™ Xtra does not power up and perform its self-test and none of the LED’s illuminate?

This could mean that the wiring is incorrect or that the supply voltage is less than 160V (see section 2 Precautions). Investigation of the wiring is required. In such circumstances verify the E-Ze Check™ Xtra in a known correctly wired socket to confirm the need for investigation.

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What happens if the E-Ze Check™ Xtra is left plugged into a socket or connected to wiring?

If the E-Ze Check™ Xtra is left plugged into a socket or connected to wiring, then after approximately 2 minutes the measurement rate and indicator flash rate will be decreased automatically.

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What happens if the wiring is correct and the supply voltage of the circuit under test is between 195V and 270V?

The lower indicators will all flash green and one of the top indicators (Loop Test) will indicate the range into which the measured earth loop impedance falls.

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What do the loop test indicators mean?

If the top centre indicator is flashing green then the measured earth loop impedance of the circuit under test is between 1.7Ω and 5Ω, or if the top left-hand indicator is flashing red then the measured earth loop impedance is between 10Ω and 100Ω. Refer to the IEE Wiring Regulations, 16th Edition or later, to determine if the indicated earth loop impedance of the wiring under test meets the necessary requirements.

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What should I do if a fault is detected?

If a fault is detected, always investigate the wiring under test or have the wiring investigated by a competent person.

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What should I do before using the E-Ze Check™ Xtra on critical circuits?

Before using the E-Ze Check™ Xtra on critical circuits which supply computers, medical equipment, or other systems where loss of supply is unacceptable, ensure these are not being operated, in line with normal practice when using electrical test equipment.

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What effect can supply circuits have on accuracy when measuring earth loop impedance?

Where supply circuits under test have highly inductive or capacitive loads distributed on that circuit or there is an excessive amount of mains disturbance present (e.g. motors running, etc) it is possible the earth loop impedance measurement could be affected.

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How can I improve measurement accuracy in such circumstances?

In such circumstances, where possible, disconnect any loads that may be a source of error. Alternatively, perform the measurement when the wiring under test is electrically quiet. The effect of these mains disturbances can be to reduce accuracy on the lower two ranges, e.g. if the actual loop impedance of the circuit under test is <1.7Ω then the E-Ze Check™ Xtra may indicate in the range 1.7Ω to 5Ω.

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How should the unit be cleaned?

The unit may be cleaned using a soft dry cloth. Do not use moisture, abrasives, solvents, or detergents, which can be conductive.

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What should I do before returning the unit?

Before the unit is returned, please ensure that you have checked the unit, poor connections and the leads (EZ650 only).

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What are the recommended storage conditions?

The instrument should be kept in warm dry conditions away from direct sources of heat or sunlight, and in such a manner as to preserve the working life of the unit. It is strongly advised that the unit is not kept in a tool box where other tools may damage it.

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How do I perform the self-test?

Every time the E-Ze Check™™ Xtra is plugged in it will perform its self-test routine by flashing each row of indicators once in the following sequence:- Top row Bottom row Top row Bottom row Top row Bottom row

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What does it mean if the E-Ze Check™™ Xtra does not perform its self-test and none of the indicators illuminate?

This could mean the supply voltage is less than 160V (see section 2 Precautions). Verify the E-Ze Check™™ Xtra in a known correctly wired socket.

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What should I do if any indicators do not illuminate or do not illuminate in the above sequence?

Do not use the E-Ze Check™™ Xtra and return it for repair.

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Figure 1. Loop Test (Top Indicators)

0 – 1.7Ω
1.7 – 5Ω
5 – 10Ω
10 – 100Ω
100 – 200Ω
200 – 500Ω
>500Ω or wiring fault or voltage <195V or >270V

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Figure 2. Mains Wiring Connections to Check Plug Pins

SOCKET WIRES UNDER TEST	POSSIBLE INDICATIONS
E N L	Wiring correct, voltage OK (>195V & <270V)
E N L	Wiring correct, voltage high (>270V)
E N L	Wiring correct, voltage low (<195V)
E N L	Wiring correct, earth neutral voltage (>30V)
OPEN E L	Open neutral
OPEN N L
OPEN L E N	Open earth (>500Ω)
E OPEN L
N OPEN L
L OPEN E N	Phase (Live) fault
OPEN E L
N OPEN L
OPEN E L
OPEN N L
OPEN E OPEN OPEN L	Serious wiring fault or Voltage <160V (see section 3.1 Precautions)

Note: ‘OPEN’ can mean absent connection or poor connection Note: The E-Ze Check™™ Xtra does not detect earth-neutral reversal, or faults that have commoned the earth and neutral pins of the E-Ze Check™™ Xtra.