UEi Test Instruments CLM100 User manual

INSTRUCTION MANUAL

CLM100

Cable Length Meter

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Introduction

Operating Instructions

The CLM100 Cable Length Meter is ideal for measuring cable length on
the spool or in existing conduits. Includes test leads, copper calibration
bar, an abrasive pad for removing oxidation and carrying case.

Features include

• 3 digit display with enunciators

• Measures in FEET (ft) or METERS (m)

• Measures COPPER (CU) or ALUMINUM (AL) wire

• Resistance range for milliohm measurements

• Automatic temperature compensation

• User calibration mode. Calibration standard included

• Auto power off

WARNING!

Make sure wire under test is not energized. Never apply voltage
to inputs.

NOTE: Temperature affects accuracy of readings. Please see accuracy
specifications. For best results, allow the CLM100 to attain the same
ambient temperature as the wire under test. The length of time this will
take depends on the ambient temperature. Typically it will take 10 to
15 minutes for the CLM100 to attain equal ambient temperature.

Safety Tips

Calibration Procedures

1. Turn the CLM100 on by depressing the green on/off button

2. Insert the black test leads into one pair of input jacks and the
red test leads into the other pair of input jacks. (Ignore the gray
marking on the banana plug.) This is very important to ensure
that the meter works correctly. If black and red test leads are
mixed the unit will give a false reading. (Fig 1)

3. Connect the Kelvin clips to the calibration standard. Make sure
the clips are as close together as possible. (Fig 2)

NOTE: Make sure the calibration standard is clean. The Kelvin
clips must be connected across the diameter of the standard.
Use the abrasive pad to clean the calibration standard.

Before using this meter, read all safety information carefully. In
this manual the word “WARNING” is used to indicate conditions
or actions that may pose physical hazards to the user. The word
“CAUTION” is used to indicate conditions or actions that may
damage this instrument.

International Symbols

NOTE: Make sure clips are as close together as possible. Use the
tips of the Kelvin clips when performing measurements on small
diameter wire.

4. Press and hold the “CAL” button until all segments in the display
illuminate. This completes the calibration procedure and will
ensure all measurements are as accurate as possible.

5. Disconnect the leads from the standard.

Measuring Length of Wire

1. Turn the CLM100 on and perform the calibration procedure.

2. Allow the CLM100 to attain the same temperature as the
wire under test.

NOTE: Temperature affects accuracy of readings. Please see
accuracy specifications. For best results, allow the CLM100 to
attain the same ambient temperature as the wire under test.

WARNING!

Make sure wire under test is not energized. Never apply voltage
to inputs.

CLM100-MAN P. 1

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3. Strip the insulation back on each end of the wire being tested.

Specifications

NOTE: Make sure both ends of the wire under test are clean and
the conductor is fully exposed. The insulation must be stripped
away so the Kelvin clips can be connected across the diameter of
the wire. Use the abrasive pad to clean the wire ends.

4. Using the selector on the CLM100, turn to the size of wire
under test.

5. Press the “COPPER” button if copper wire is being tested.
The “CU” enunciator will illuminate in the top left corner of
the display.

6. Press the “ALUM” button if aluminum wire is being tested.
The “AL” enunciator will illuminate in the top left corner of
the display.

7. Press the “FT” button if you require readings to be in feet.
The “ft” enunciator will illuminate in the display.

8. Press the “M” button if you require readings to be in meters.
The “m” enunciator will illuminate in the display.

9. Connect a Kelvin clip to one end of the wire and the other
Kelvin clip to the other end of the wire.

10. Read the length of wire directly from the display. Please note

the “k” enunciator illuminates if measurements are at or above
1000 feet/meters.

Measurement Range: 15 to 30,000 feet

26ga to 4/0ga
250MCM to 500MCM

Accuracy: Ambient Temperature: 65˚ to 75˚F

< 30ft: ±6 LSD
> 30ft: ±(2% of reading + 3 LSD)

Ambient Temperature: <65˚ and >75˚F
< 30ft: ±6 LSD
> 30ft: ±(3% of reading + 3 LSD)

LSD = least significant digit

Resistance: 0 to 65Ω (±2% of reading)

Operating Temperature: 32˚ to 104˚F

Operating Humidity: 20% to 80% RH

Storage Temperature: 0˚ to 120˚F

Auto power off: After 5 minutes (approx.)

Battery Life: Depends on use. Typically 40 hours.

Extended measurements times can lower battery
life to no less than 6 hours.

WARNING: This meter is NOT designed to measure less than 15ft cable.

Operational Hints

• Never apply voltage to the inputs.

11. Disconnect the test leads from the unit when not in use.

Low Battery Indication

The “BAT” enunciator will illuminate in the lower left side of the display
to indicate battery voltage is low. The battery should be changed
immediately to ensure proper function and accuracy. Only alkaline
9 Volt batteries should be used.

Measuring Resistance

1. If the resistance to be measured is wire, follow steps 1 through

3 under “Measuring Length of Wire.” Then follow steps 2 and
3 below. If a discrete resistor is being measured, turn the cable
length meter on and perform the calibration procedure.

2. Using the selector on the CLM100, turn to “R” on the dial.

3. Read the resistance of the wire directly from the display.

• Temperature affects readings. Allow the CLM100 to attain the
ambient temperature of the wire under test.

• Use a 9 Volt alkaline battery only

• Use the test leads that came with the unit only. Other leads
will not work.

• Ensure that the test leads are clean and in good working order.

• Use an abrasive pad similar to the one provided to ensure the
wire under test is clean and free of oxidation.

• Ensure that insulation is stripped adequately from both ends of
the wire under test. This will enable measurements to be accurate.

• Ensure that the alligator clips are connected across the diameter
of the wire under test.

• When measuring wire for insertion into conduit, add extra wire
to compensate for the accuracy of the meter. For example, 205
feet of wire is needed to run inside a piece of conduit that is 200
feet long. (This would allow 2.5 feet on each end to attach the
wire.) At 205 feet and 70˚F, the cable length meter has an
accuracy of ±7 feet. In this case it would be safer to measure out
212 feet of wire. This would ensure that enough wire is available
for the application.

CLM100-MAN P. 2

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CLM100

Cable Length Meter

Limited Warranty

The CLM100 is warranted to be free from defects in materials and workmanship for a
period of five years from the date of purchase. If within the warranty period your
instrument should become inoperative from such defects, the unit will be repaired or
replaced at UEi’s option. This warranty covers normal use and does not cover damage
which occurs in shipment or failure which results from alteration, tampering, accident,
misuse, abuse, neglect or improper maintenance. Batteries and consequential damage result­ing from failed batteries are not covered by warranty.

Any implied warranties, including but not limited to implied warranties of merchantabil­ity and fitness for a particular purpose, are limited to the express warranty. UEi shall not
be liable for loss of use of the instrument or other incidental or consequential damages,
expenses, or economic loss, or for any claim or claims for such damage, expenses or
economic loss. A purchase receipt or other proof of original purchase date will be required
before warranty repairs will be rendered. Instruments out of warranty will be repaired (when
repairable) for a service charge. Return the unit postage paid and insured to:

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