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December 2009
CLM5000
Cable Length Meter
Use to measure cable length and generate tone
®
BLACK BOX
on industrial, telco, and coax cable (not CATx).
Works on single- or two-conductor cables.
Compact, handheld unit.
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call
Customer
Support 724-746-5500) • FREE technical support 24 hours a day, 7 days a
week: Call 724-746-5500 or fax 724-746-0746 • Mailing address:
Information
Black Box Corporation, 1000 Park Drive, Lawrence,
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FCC and IC RFI Statements FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio-frequency energy, and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause inter ference to radio communication. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart B of Par
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Cable Length Meter Normas Oficiales Mexicanas (NOM)Electrical Safety Statement INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura. 3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas. 4. Todas las instrucciones de operación y uso deben ser seguidas.
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NOM Statement 12. P recaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. L os cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato. 14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante. 15. En caso de existir, u
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Cable Length Meter Trademarks Used in This Manual Black Box and the Double Diamond logo are registered trademarks of BB Technologies, Inc. Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners. Page 4 724-746-5500 | blackbox.com
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Table of Contents Chapter Page 1. Specifications ..............................................................................6 2. Overview ....................................................................................8 2.1 Introduction ..........................................................................8 2.2 Features ................................................................................8 2.3 What’s Included ........................................................
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Cable Length Meter 1. Specifications Cable Types: Single or dual conductor, 8–30 AWG, network, coax, and telco Temperature Tolerance: Operating: 32 to 122° F (0 to 50° C); Storage: +14 to +140°F (-10 to +60° C) Humidity: 10 to 90%, noncondensing Power: (1) 9-V alkaline battery: Standby: 2.5 years; Cable Testing: 20 hours into 60-ohm load (smaller resistance loads will result in shorter battery life) High-Voltage Protection: 120 VAC maximum Size: 1.3"H x 3"W x 6"D (3.3 x 7.6 x 15
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Chapter 1: Specifications Table 1-2. Length measurement range DC (resistance 0–635 ohms). AWG Min. (ft.) Length Tolerance 8, 10 5.0 0-9999 ft. ±2%, ±3 LSD* (3047 m) 12, 14, 16 4.0 0–9999 ft. ±2%, ±3 LSD (3047 m) 18, 20, 22 3.0 0–9999 ft. ±2%, ±3 LSD (3047 m) 24, 26, 28 1.0 0–9999 ft. ±2%, ±3 LSD (3047 m) 30 1.0 0–5879 ft. ±2%, ±3 LSD (1792 m) *LSD = Least significant digit 724-746-5500 | blackbox.com Page 7
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Cable Length Meter 2. Overview 2.1 Introduction The Cable Length Meter for industrial, network, telco, and coax cable (not CATx) is an easy-to-use, versatile compact handheld unit that measures cable length and generates tone. It works on single- or two-conductor cables for testing and trouble- shooting. CAUTION: Do not attach test leads to energized cables. The Cable Length Meter might be damaged. 2.2 Features • Measures the distance to an open or the distance to a short • O perates in six
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Chapter 2: Overview 2.3 What’s Included • (1) Cable Length Meter • (1) double-banana to BNC + BNC F to F jack • (2) test leads • (2) clips • (1) carrying pouch 2.4 Hardware Description Figure 2-1 illustrates the Cable Length Meter. 6. Heavy-Duty Test Leads 7. Mode Select 1. Large LCD Display Button 2. Test Lead 8. Copper/Aluminum Calibration Button Distance Button 3. Up Button 9. Down Button 4. Power Button 10. Set Wire Length Button 5. Pair/Single Conductor Button Figure 2-1. Cable Length
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Cable Length Meter 3. General Functions 3.1 PWR Key and Auto Power Off Press the PWR key to turn the unit on and off. If no keys have been pressed, the Cable Length Meter powers off automatically after 10 minutes. The timer resets every time you press a key. In Tone mode, the unit will automatically power off after 1 hour. 3.2 Mode Key The Cable Length Meter operates in eight modes. Press the “Mode” key to cycle through the various modes: 2 2 • AWG/mm/mm mode: measures cable length in AWG
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Chapter 3: General Functions 3.4 LCD Display Icons Table 3-1 describes the icons that appear on the LCD display. Table 3-1. LCD display icons. Icon Description Coax mode Telco mode Network mode Tone mode 2 Two-conductor icon (AWG/mm/mm mode) 2 One-conductor icon (AWG/mm/mm mode) Short symbol, indicates the presence of a short between two conductors. An audible tone is also generated. (Coax, Telco, and Network mode) Unit detects voltage on the line Battery low icon. The Ca
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Cable Length Meter 4. Using the Cable Length Meter 4.1 AWG Mode This mode allows length measurements from 8 to 30 AWG (8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, and 30 AWG). Use the UP/DOWN keys to scroll through the various wire gauges. Select from copper or aluminum type wires and meters or feet. Figure 4-1 shows a typical AWG Mode screen. Figure 4-1. AWG Mode screen. Page 12 724-746-5500 | blackbox.com
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Chapter 4: Using the Cable Length Meter 2 Table 4-1. AWG/mm/mm cross-reference data. 2 AWG Diameter (mm) Area (mm ) #8 3.264 8.37 #9 2.906 6.63 #10 2.588 5.26 #11 2.305 4.17 #12 2.053 3.31 #13 1.828 2.62 #14 1.628 2.08 #15 1.450 1.65 #16 1.291 1.31 #17 1.150 1.04 #18 1.024 0.823 #19 0.912 0.653 #20 0.812 0.518 #21 0.723 0.410 #22 0.644 0.326 #23 0.573 0.258 #24 0.511 0.205 #25 0.455 0.162 #26 0.405 0.129 #27 0.361 0.102 #28 0.321 0.081 #29 0.286 0.064 #30 0.255 0.051 724
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Cable Length Meter 4.2 Pair SGL Key The Cable Length Meter can measure single- or two-conductor wires. Press the PAIR SGL key to toggle between single or two conductor. For single-conductor measurement, the unit is connected at both ends of the wire/conductor. For two- conductor measurements, the unit is connected one end of the wire and the other end of the pair is shorted (wire length = total resistance/2). SET LEN Key (AWG Mode Example) The Set Length function allows the user to change f
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Chapter 4: Using the Cable Length Meter 3. P ress the SET LEN (LEN = Length) key, and the Set Length screen (Figure 4-2) appears. In this mode, use the UP/DWN keys to adjust the larger digits to match the length of the sample wire (100–200 ft. range). If the sample wire is 150 feet and its resistance is equal to 0.315 ohms, the smaller digits on the left-hand side of the screen will display “0.0021 ohms/ft. (150 feet/0.315 ohms = 0.0021 ohms/ ft.) 4. T o store the new value, press the SET LE
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Cable Length Meter 4.3 Coax, Network, and Telco Modes Coax, Network, and Telco modes detect the distance to opens and the distance to shorts. The Cable Length Meter determines the length by measuring line capacitance when the line is open or by measuring resistance when the line is shorted. When measur- ing opens, use the UP/DOWN keys to adjust the capacitance coefficient (10 to 40 pf per feet) to calculate the cable length. The Cable Length Meter supports three user-adjustable length coef
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Chapter 4: Using the Cable Length Meter Example: The factory default for Network wire is .0273 ohms per feet. Press the MODE key to select Network mode. Press the SET LEN (LEN = Length) key, and a new screen will pop up (see Figure 4-4). In this mode, use the UP/DOWN keys to adjust the larger digits to match the length of the sample wire (100–200 feet range). If the sample wire is 150 feet and its resistance is equal to .315 ohms, the smaller digits on the left hand side of the screen will
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Cable Length Meter Changing Opens/Capacitance Coefficient Using Set Length To change capacitance coefficients, follow the steps above (cable/wire must be open) based on the sample wire (100 to 200 feet). The Cable Length Meter measures the total capacitance of the cable and displays the value in the lower left- hand corner of the LCD (the cable must be within 10 to 40 pf per feet range, other- wise meter will indicate OL). Table 4-3. Opens/shorts factory default values. Mode Capacitance Open
