elma 6501 Cable Length Tester

elma 6501 Cable Length Tester

Description of Elma 6501

The cable length gauge is et handheld testing device with the following measurement features: resistance, temperature and cable length.
It can be used as mΩ meters to measure precise resistances in a circuit.
The primary function is to calculate the length of a cable electricity based on its material,
temperature testing devices material type can be either uncoated copper or aluminum.
There are 20 pre-programmed and eight programmable cable gauges.

Safety instructions

WARNING
Pay attention and read the instructions in this manual: Improper use may damage the instrument or its components.

Double insulated

Electric shock and fire hazard:

Do not connect this device to the “live circuit”
Do not use the instrument in an environment with rain or moisture.
Do not use the instrument if it is wet or damaged in any way.
Do not use and connect the instrument if it is disassembled in any way.
Do not attempt to repair this instrument, it contains no parts that the user can replace.
Do not expose this instrument to extreme temperature or high humidity, see “‘Specifications”
Remove sample wires from the circuit and turn off the instrument when changing the battery.
Do not use the instrument, near equipment that generates electromagnetic interference, this may result in unstable or inaccurate measurements.
Check that the test cord accessories and the instrument are undamaged, clean, and dry before use.
Use the instrument only for what it is intended for and as described in this manual. Any other use may impair the protection provided by the instrument.
Failure to follow these instructions may result in serious injury or death.

General description

The instrument can perform the following measurements:

20 measurement gears in line with industry standards 0.15 – 0.25 – 0.5 – 0.75 – 1 – 1.5 – 2.5 – 4 – 6 – 10 – 25 – 35 – 50 – 70 – 95 – 120 – 150 – 185 -240mm2
8 memory locations in user select mode.
mΩ resistance test function
Measures copper and aluminum cables.
Ambient temperature measurement for automatic compensation of the measurements.

Description

Instrument description

Symbol and display

Info about saved data / confirmation
Ambient temperature
Celsius or Fahrenheit’s unit
Low resistance
Copper (Cu)
Aluminum (Al)
Calibration
Measurement result/ info notification
milliOhm (resistance)
Custom Cable Type No.
KM or Feet
Data Hold
ERROR
Auto power off (active)
Battery level
Negative sign for measurement result [8]

Accessories included

1 pc. Bag
1 pc. Manual
1 pc. Copper rod
2 pcs. Kelvin clips

Description of function keys

Backlight

Press the key to turn the backlight on and off.

HOLD key

Press the HOLD key to keep the current reading on the display.

Mem key

The MEM key is used for the user-selected programming function.
Refer to the “Operation” section for a full description of the function.
Press and hold the MEM key to turn off the auto-off feature.

CAL key

The instrument must be calibrated each time it is turned ON.
Refer to the “Operation” section for a complete description of the calibration process.
Go to enter/exit length setting mode.

FT/M key

Press momentarily to select length measurement units.
The LCD displays “ft” for Feet and “m” for Meter.

Cu/Al key

Press the Cu/AI key to select copper or aluminum wire measurements.
Press and hold the Cu/ AI key to select temperature unit °C/°F.

Up/Down key

Used during the user-selected programming process.
Refer to the “Operation” section for a description of the programming process.

Operation

WARNING: Do not connect the instrument to live voltage.

Calibration procedure

Each time the instrument is turned on, it must be calibrated to equalize the resistance in the test wires.
Turn the Rotary switch [10] from OFF to Ω.
Connect the two Kelvin clips to the included Copper rod, as close together as possible.
Note: Make sure the Copper rod and Kelvin clips are perfectly clean.
Press: CAL key, wait 3 seconds, the display switches between “” and “” now press the MEM key, when the display shows “” for a moment then the calibration is done correctly.

If the display show “” after pressing the MEM key, the calibration has failed.

Check again if there is a correct and good connection and repeat the calibration.

Measuring cable length

WARNING: Do not connect the instrument to live voltage.

Note. For best results, the instrument and cable to be measured should have the same ambient temperature, it will typically take about 30 min

Set the rotary switch [10] from OFF to Ω.
Calibrate the instrument as described in 6.1 Calibration procedure
Set the rotary switch [10] to the wire diameter which corresponds to the wire to be
measured.
If the cable to be measured is in copper, press the Cu/AL key so that the display shows the
symbol “Cu“, is the cable, in aluminum, then press the Cu/AL key so that the display shows the symbol “AL“
Press the FT/M key and choose whether the result should be seen in Feet (ft) or in Meter
(m)
Clean the ends of the wire to achieve good contact. If necessary, use abrasive paper to
remove oxide layer on each end if necessary.
Connect the 2 alligator clips at each end of the cable.
The display shows the total length of the wire.

User-selected cable type

You can store up to 8 of your own cable types.
The length can then be measured on any conductive cable.

Save the resistance in a cable type of your choice

Note: Prepare a 4-100m [13.1ft-320ft in FEET MODE] Sample length of the wire to be programed into the meter so that the meter can correctly measure the resistance of this sample wire and store it in lengths of the same kind of wire when you want. Make sure the sample wire to be measured is not energized or live.

Accurately measure the length of the reference cable with tape measure or otherwise. In the instrument will then measure the resistance in the reference cable and store this information.

For best results, the instrument and reference cable should have roughly the same ambient temperature, which will typically take about 30 minutes.

Insulate and clean the wire ends of the reference cable to achieve good contact. If necessary, use abrasive paper to remove oxide layer on each end if necessary. The reference cable must not be live.

Measure the length of custom cable type

Calibrates the instrument as described in 6.1 Calibration procedure.
Insulate the cable to be tested at both ends and make sure that a good contact can be
made.
With the rotary switch [10], select the position (1-8) that suits the selected type of cable.
Press the FT/M key to choose whether to view the result in Feet or In Meters
Connect alligator clips at both end of the cable.
The display now shows the total length of the custom cable.

Delete memory for a custom cable type

Disconnect all cables on the instrument.
Set the rotary switch [10], select the custom setting (1-8) to be deleted.
a. If the display displays no in the selected option, the option has not been used. b. The display should show OL before it makes sense to erase the memory of this.
Press the CAL key, the display will switch between no and ““.
Now press the MEM key 2 times and the custom cable type will be deleted.

Measure resistance

Set the rotary switch [10], select the Ω.
Calibrate the instrument as described in 6.1 calibration procedure
For best results, the instrument should have the same ambient temperature.
Make sure that a good contact can be made with the alligator clips, to the object to be measured.
The display now shows the measured resistance

Measure temperature

The internal temperature sensor measures the temperature displayed in the display
If the temperature is less than -5 0C (23 0F), the display shows: -OL
If the temperature is right than 500 0C (122 0F) the display shows: OL
Press and hold the Cu /Al key to choose whether to see the result in °C / °F

Maintenance

This instrument is designed to be reliable for many years if maintained as described here.

Always keep the meter dry, if it gets wet wipe, it off.
Use and store the meter in normal temperatures, temperature extremes can shorten the life of the electronic parts and distort or melt plastic parts.
Handle the instrument with caution, if the instrument is dropped, it may damage the electronic parts of the instrument.
Keep the meter clean, wipe the case occasionally with a damp cloth, do not use chemicals, cleaning solvents or detergents.
Use only fresh batteries of the recommended size and type, remove old or weak batteries so they do not leak and damage the unit.

Replace the battery

WARNING! Before unscrewing the battery cover, remove the test cords from the circuit and turn off the instrument.

Open the battery cover one that sits below the tilt stand on the back of the instrument by removing the 2 screws with a Phillips screwdriver and lifting the bottom of the battery cover.
Insert 6 new AA (LR6) battery into the battery holder, pay attention to correct polarity.
Replace the battery cover, reattach the 2 screws.

Specifications

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