CT40

User's Guide Cable Tester and Digital Multimeter Model CT40 Introduction Congratulations on your purchase of the Extech CT40. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. The CT40 is a cable tester which uses a transmitter/receiver to allow for wire identification of an individual core to the end of a multi-core cable .The meter’s digital multimeter functions provides for easy measurement of AC/DC Voltage, AC/DC Current, Resistance, Continuity and Diode check. Safety International Safety Symbols This symbol, adjacent to another symbol or terminal, indicates the user must refer to the manual for further information. This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages may be present Double insulation Safety Notes • • • Do not exceed the maximum allowable input range of any function. Set the function switch OFF when the meter is not in use. Remove the battery if meter is to be stored for longer than 60 days. Warnings • • • Set function switch to the appropriate position before measuring. Do not measure current on a circuit whose voltage exceeds 600V. When changing ranges always disconnect the test leads from the circuit under test. Cautions • • • • • Improper use of this meter can cause damage, shock, injury or death. Read and understand this user manual before operating the meter. Always remove the test leads before replacing the battery. Inspect the condition of the test leads and the meter itself for any damage before operating the meter. Repair or replace any damage before use. Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC. These voltages are considered a shock hazard. Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty of connection to the recessed electrical contacts. Other means should be used to ensure that the terminals are not "live". If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. • 2 CT40 V1.0 06/09 Meter Description 1. 2. 3. 4. 5. 6. 7. 8. 9. Low Battery Indicator -Receiver Receiver Alligator Test Leads Operation Indicator -Receiver On/Off Switch -Receiver Hold Switch – Digital Multimeter DMM Input Jacks 13 12 Mode 11 10 9 8 7 1 2 14 3 4 5 15 16 Max Button – Digital Multimeter Mode Mode Button – Digital Multimeter Mode LCD Display – Multimeter Mode 10. Rotary Switch – Multimeter Mode 11. R Test Button –Continuity Beep Test 12. V Check Button – Cable Voltage Check 13. LCD Display for Cable Identifier Function 14. Operation Indicator- Transmitter 15. Low Battery Indicator –Transmitter 16. On/Off Switch – Transmitter 17. Transmitter Alligator Test Leads – CH1-16 6 17 LCD display descriptions 1. 2. 3. Cable ID Number Display Low bat LED OP operation LED LO BAT 1 2 3 OP 4. 5. 6. 7. 8. 9. Autorange Indicator Diode Test Continuity Display Hold Max Low Battery Indicator 4 12 56 7 8 9 10 11 10. Units 11. DMM Digit Display 12. AC/DC Indicators 3 CT40 V1.0 06/09 Operation Transmitter and Receiver Cable Tester Operation 1. 2. 3. 4. 5. 6. 7. Press down the receiver’s ON/OFF switch. The upper blue display will indicate “00” and the OP LED should light. Press down the transmitter’s ON switch. The OP LED will flash. Connect one of the transmitter’s alligator clips (CH1 to CH16) to each core (wire) of the cable under test. Connect the transmitter’s “COM” reference lead (black alligator) to a known common for all cables, such as ground or cable sheath. Connect the receiver’s “COM terminal” (black alligator) to the common. Touch the receiver’s “input terminal” (red alligator) test lead to one core of the cable under test. The number of the wire selected is indicated on the display of the receiver (1-16). CAUTION: Do not apply over 50V (AC or DCV) to test leads of transmitter or receiver. This could result in permanent damage to the meter. Continuity Beep Test 1. 2. 3. Press the R TEST button down. Connect the receiver’s red and black alligator clips to each end of a wire. If there is continuity (