Usage:
Introduction
6V-7070 Heavy-Duty Digital Multimeter (Comes With Test Leads)
6V-7800 Regular-Duty Digital Multimeter (Comes With Test Leads)
Insta-Ohms® is a registered trademark of Wavetek Corporation.
Features
The 6V-7070 Heavy-Duty Digital Multimeter and the 6V-7800 Regular-Duty Digital Multimeter comes equipped with two standard test leads and this Special Instruction.
Both multimeters are portable, hand-held, 3 1/2 digit meters. Equipped with seven functions and 29 Ranges. The multimeters also have an Insta-Ohms® Quick Continuity Indicator that permits fast circuit tracing. It can also be used for troubleshooting small value capacitors.
They have a 2 Amp, 600 Volt fuse inside the case to protect the 2 Amp current range. All voltage ranges are further protected against voltage inputs up to 6000 Volts for 10 microseconds.
The 6V-7070 Multimeter has a ten ampere current range protected by a 15 amp fuse.
All resistance ranges are low power ohms, which allow accurate measurements of in-circuit resistance. In circuits where resistors are directly shunted by typical silicon diodes and transistors, accurate measurements can be made because test voltages are held to less than 250 mV.
A special diode test function allows accurate measurements of forward voltage drops across diode, LED's and transistor junctions with 2 mA of constant test current. Semiconductor junctions can also be measured while in-circuit, with as little as 500 ohms shunt resistance.
A common 9 volt alkaline battery provides up to 2000 hours of continuous operation. The decimal point blinks during the last 10 percent of battery life.
Both meters are completely shielded to eliminate RF interference.
The specified accuracy is guaranteed for one year without calibration on both meters.
Safety
Do not use or perform maintenance on multimeters unless you have read and understand the instructions and warnings in this publication. Failure to follow the instructions and heed the warnings could result in injury or death.
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During current measurements using the A or 10A input connector, personal injury or instrument damage can occur if the fuse blows in a circuit that has an open circuit voltage greater than 600 volts. |
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To avoid electrical shock hazard, always inspect the test leads, connectors and probes for cracks or breaks in the insulation before use of the instrument. If any defects are found, replace the damaged item immediately.
To avoid electrical shock hazard and/or damage to the instrument, do not measure voltages that can exceed 1500 Volts above earth ground.
Use extreme caution when working near high voltage sources to avoid electrical shock hazard. This includes any voltage measurements requiring the use of 200 Vac, 1000 Vac, 200 Vdc and 1500 Vdc ranges.
To avoid electrical shock hazard, do not touch the test lead tips or the circuit being tested while the power is applied to the circuit.
| NOTICE |
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Exceeding the maximum input overload limits can cause damage to the multimeter. When making current measurements, never connect the multimeter across a voltage source. If this is done, it can either blow the overload protection fuse or cause damage to the device being tested. Make sure that the multimeter is connected in series with the load in which the current is to be measured. |
Replacement and Optional Items for Use with Caterpillar Multimeters
(1). 6V-7801 Lead-10 Amp Fused. (For 6V-7070 Multimeters without internal 10 or 15 amp fuses.)
(2). 6V-7803 Fuses 2 Amp.
(3). 9U-6398 Fuses 15 Amp. (For 10 amp input)
(4). 6V-3072 Carrying Case. (5). 6V-6040 Carrying Case Foam Insert. (6). SEHS8026 Decal.
(7). 6V-4960 1000 Amp AC Current Probe Group (Includes 6V6014 Test Leads).
(8). 6V-6014 Test Leads.
(9). 8T0900 AC/DC Clamp-On Ammeter.
(10). 9U-5795 AC/DC Current Probe
(11). 6V-3031 Carrying Case
(12). 6V-7072 Deluxe Lead Kit
(13). 8T-3224 Needle Tip Group
(14). 1U-8115 Insulated Tip Test Probe Kit
Multimeter Specifications
General
Operating Temperature Range:
- 0 to 50°C (32 to 122°F)
Storage Temperature Range:
- -40 to 65°C (-40 to 149°F) with battery removed.
Display:
- 3 1/2 digit liquid crystal display (LCD) with a maximum reading of 1999.
Power:
- Single 1U-9534, 9 volt alkaline battery, NEDA 1604.
Battery Life:
- Alkaline - 2000 continuous hours, nominal.Zinc Carbon - 1600 continuous hours, nominal.Under typical usage, two (2) years.
Low Battery Indicator:
- Decimal point blinks when 200 hours of battery life remain.
Case:
Measurement Rate:
- Four measurements per second nominal.
Shock and Vibration:
- Meets MIL-T-28800 specifications.
Relative Humidity:
- 0 to 80% at 0 to 35°C (32 to 95°F)0 to 70% at 35 to 50°C (95 to 122°F)
Temperature Coefficient:
- 0 to 20°C (32 to 68°F)30 to 50°C (86 to 122°F) - less than 15% of applicable specifications per °C.
Maximum Common Mode Voltage:
- 1500 Vdc or peak ac.
Dimensions:
Weight:
Calibration:
- Accuracy specifications guaranteed for one (1) year, 20 to 30°C (68 to 86°F).
Instrument Includes:
- * 9 volt alkaline battery.
- * Spare 2 amp fuse.
- * Test leads.
- * Special Instruction.
- * Spare 2 amp fuse.
DC Voltage
General:
- Automatic polarity indication (± indicated).
Input Impedance (All Ranges):
- 22M Ohms.
Normal Mode Rejection:
- Greater than 60dB above 49Hz.
Common Mode Rejection:
- Greater than 160dB up to 1500Vdc.
Response Time:
- Less than 1 second.
Overvoltage Protection:
- 1500Vdc or peak ac, any range.
AC Voltage
Conversion Technique:
- Average sensing, calibrated to display rms value of sine wave.
Input Impedance (All Ranges):
- 2.2 megohms, shunted by less than 75pF.
Response Time:
- Less than 2 seconds.
Overvoltage Protection:
- 1000Vrms ac (1500 peak) or 250Vdc (5 seconds maximum above 450 Vrms on 200mV range).
DC Current
General:
- Automatic polarity indication (± indicated).
Response Time:
- Less than 1 second.
Voltage Burden:
- 200μA to 200mA ranges - 250mV maximum @ full scale.2A range: 700mV maximum @ full scale10A range - 600mV maximum @ full scale (6V-7070 only).
Overcurrent Protection - A Input:
- 2 amperes, 600V (fused).
Overcurrent Protection - 10A Input: (6V-7070 only)
- 15 amperes, 600V (fused).
AC Current
Conversion Technique:
- Average sensing, calibrated to display rms value of sine wave.
Response Time:
- Less than 2 seconds.
Voltage Burden:
- 200μA to 200mA ranges - 250mV maximum @ full scale.2A range - 700mV maximum @ full scale10A range - 600mV maximum @ full scale (6V-7070 only).
Overcurrent Protection - A Input:
- 2 amperes, 600V (fused).
Overcurrent Protection - 10A Input: (6V-7070 only)
- 15 amperes, 600V (fused).
Resistance
General:
- Low power ohms on all ranges, no need for zero adjustment.
Maximum Open Circuit Voltage:
- 0.5V, all ranges.
Response Time:
- Less than 1 second, except on 20M range, less than 4 seconds.
Overload Protection:
- 600Vdc or rms ac, any range.
Diode Test
Range:
- 0V to 2V.
Resolution:
- 1mV.
Accuracy:
- ± (0.25% reading + 2 digits).
Overload Protection:
- 600 Vdc or rms ac.
Accuracy Conditions:
- 1 year, 20 to 30°C (68 to 86°F)
Test Current:
- 2mA ± 20%.
Response Time:
- Less than 1 second.
Insta-Ohms® Quick Continuity Indicator
Response Time:
- Less than 100 milliseconds.
Preparation For Use
Assembly
The multimeter is shipped ready for use. The only action required by the user is to place tilt bail in the desired position as shown.
The tilt bail can be moved from one position to another by squeezing the two sides of the bail together, then putting the tips of the bail in the desired position.
The tilt bail can also be used as a carrying or hanging handle by removing it and reversing the direction.
Functions
It is highly recommended that the user become familiar with the controls, indicators and connectors of the multimeter as described in this section before operating the multimeter.
Digital display (1) is a 3 1/2 digit LCD readout with automatic decimal point placement, automatic polarity indicator, overrange indication (OL), low battery indication (blinking decimal point) and Insta-Ohm® Quick Continuity Indicator Ohms.
The readout indicates measured input value in Volts, Amperes or Ohms as selected by Function/Range Switch (2).
Function/Range Switch (2) is the only control on the multimeter. This switch turns the instrument on and off, selects the function and the desired range.
Turning pointer (3) selects one of the following six functions:
- * DCV - The DCV function provides five ranges from 200mV to 1500 Volts dc.
- * ACV - The ACV function provides five ranges from 200mV to 1000 Volts rms ac.
- * DCA.
- * ACA.
- * ACV - The ACV function provides five ranges from 200mV to 1000 Volts rms ac.
The DCA and ACA functions each provide five ranges from 200μA to 2A full scale. The 20m/10A positions (on 6V-7070 only) serve two purposes as follows:
- A. When using "A" input connector (4), the 20m/10A position serves as a 20m A range.
- B. When using "10A" input connector (5), the 20m/10A position serves as the 10A range.
- * Ohms (ohms) - This function provides six ranges of resistance measurement from 200 Ohms to 20 M Ohms. The continuity test function on the 6V-7070 operates in any resistance range.Diode Test
(6) - This function is used for checking diodes and other semiconductor junctions.
"A" input white connector (4) is used for current measurements up to 2 Amperes. The unit is protected by a fuse against inputs over 2 Amperes.
10A input connector (5) is used for current measurements from 0 to 10 Amps on 6V-7070 only.
COM Input Black Connector (7) is used as the common or low input for all measurements.
V-Ohms input red connector (8) is used as the high input for all voltage and resistance measurements.
Initial Check-Out
Before using the multimeter, perform the following checkout procedure to ensure that the instrument is working properly. The only equipment required is the test leads.
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To prevent electrical shock hazard, turn off the multimeter and disconnect the test leads before removing the back cover. |
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1. After disconnecting the test leads and turning off the multimeter, remove four screws (1) and back cover (2). Check to make sure battery (3) and fuse (4) are installed.
Refer to Battery Replacement and Fuse Replacement sections in the topic entitled Maintenance, if necessary. Install the back cover and four screws.
2. Connect the red test lead to the V-Ohms Input Connector and the black test lead to the COM Input Connector.
3. Turn the Function/Range Switch to the 1500 DCV position.
4. Touch the red test lead and black test lead together. Observe the digital display: it should read 000 ± 1.
5. Turn the Function/Range Switch counterclockwise to each DCV position while observing the digital display.
With the test lead tips in contact, the digital display should read zero plus or minus one digit and the decimal point positioned as follows:
6. Turn the Function/Range Switch to the 20MOhms position. With the two test lead tips separated, the digital display should read OL (overload).
7. Touch the test lead tips together and observe the digital display: it should read 0.00 or 0.01.
8. Turn the Function/Range Switch to each Ohms position while observing the digital display. With the test lead tips in contact, the digital display should read zero in each position. In the 200 Ohms position, the digital display may read 000.1 or 000.2 because of test lead resistance.
The decimal point should be positioned as follows:
9. Turn the Function/Range Switch to the 1000 ACV position.
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The next step requires the measurement of the local ac line (mains) voltage. Be careful not to touch the test lead tips with fingers and do not allow the tips to contact each other. |
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10. Measure the local line (mains) voltage at a convenient ac power outlet. The digital display should show the appropriate voltage with a resolution of one volt.
11. Remove both probes from the ac outlet.
12. If the instrument has performed correctly during this checkout procedure, it is fully operational and ready to use.
Tests and Measurements
NOTE: The multimeter is equipped with automatic overload protection. This means that whenever an input signal is larger than the range selected, an overload symbol (OL) will appear in the digital display. This allows the user to test devices with unknown circuitry where an overload condition might exist.
DC Voltage
1. Connect the red test lead to V-Ohms Input Connector and the black test lead to COM Input Connector.
2. Set the Function/Range Switch to the desired DCV position. If the magnitude of the voltage is not known, set the switch to the highest range, then reduce until a satisfactory reading is obtained.
3. Turn off power to the device or circuit being tested and discharge all capacitors.
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To avoid electrical shock hazard and/or damage to the instrument, do not attempt to measure voltages that might exceed 1500 volts. |
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4. Connect the test leads to the device or circuit being tested.
5. Turn on power to the device or circuit being tested. Voltage value will appear on the digital display along with the voltage polarity.
6. Turn off power to the device or circuit and discharge all capacitors before disconnecting the test leads.
AC Voltage
1. Connect the red test lead to the V-Ohms Input Connector and the black test lead to COM Input Connector.
2. Set the Function/Range Switch to the desired ACV position. If the magnitude of the voltage is not known, set the switch to the highest range and reduce until satisfactory reading is obtained.
3. Turn off power to the device or circuit being tested and discharge all capacitors.
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To avoid electrical shock hazard and/or damage to the instrument, do not attempt to measure voltage that might exceed 1000 volts rms or 1500 volts peak ac. |
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4. Connect the test leads to the device or circuit being tested.
5. Turn on the power to the device or circuit being tested. The voltage value will appear on the digital display.
6. Turn off the power to the device or circuit, and discharge all capacitors before disconnecting the test leads.
DC Current
1. 6V-7070 and 6V-7800: For current measurement up to 2 Amperes, connect the red test lead to the A Input Connector.
2. Connect the black test lead to the COM Input Connector.
3. Set the Function/Range Switch to the desired DCA position. If the magnitude of the current is not known, set the switch to the highest range, then reduce until a satisfactory reading is obtained.
4. 6V-7070 only: For current measurement up to 10 Amperes connect a standard test lead to the 10A Input Connector.
When using the 10A Input Connector, set the Function/Range Switch to the DCA 20 m/10A position.
5. Turn off power to the device or circuit being tested, and discharge all capacitors.
6. Open the circuit in which the current is to be measured. Connect the test leads in series with the load in which the current is to be measured.
7. Turn on the power to the circuit being tested.
8. Read the current value on the digital display.
9. Turn off power to the circuit being tested and discharge all capacitors.
10. Disconnect the test leads from the circuit and reconnect the circuit that was being tested.
AC Current
1. 6V-7070 and 6V-7800: For current measurement up to 2 amps, connect the red test lead to the A Input Connector.
2. Connect the black test lead to the COM Input Connector.
3. Set the Function/Range Switch to the desired ACA position. If the magnitude of the current is not known, set the switch to the highest range, then reduce until a satisfactory reading is obtained.
4. 6V-7070 only: For current measurement up to 10 Amperes, connect a standard test lead to the 10A Input connector. Set the Function/Range Switch to the ACA 20m/10A position.
5. Repeat Step 5 through 10 under DC Current.
Resistance Measurement
NOTE: All resistance ranges on the multimeter are low power ohms that allow accurate measurements of in-circuit resistance.
Use the Diode Test Function for checking diode and other semiconductor junctions.
1. Connect the red test lead to V-Ohms Input Connector and the black test lead to COM Input Connector.
2. Set the Function/Range Switch to the desired Ohms position. If the magnitude of the resistance is not known, set the switch to the highest range, then reduce until a satisfactory reading is obtained.
3. If the resistance being measured is connected to a circuit, turn off the power to the circuit being tested and discharge all capacitors.
4. Connect the test lead to the circuit being measured. When measuring high resistance, be careful not to contact adjacent points, even if insulated. Some insulators have a relatively low insulation resistance that can affect the resulting measurement.
5. Read the resistance value on the digital display. If a high resistance value is shunted by a large value of capacitance, allow the digital display to stabilize.
Diode Tests
1. Connect the red test lead to the V-Ohms Input Connector and the black test lead to COM Input Connector.
2. Set the Function/Range Switch to the Diode Test
position.
3. If the semiconductor junction being measured is connected to a circuit, turn off the power to the circuit being tested and discharge all capacitors.
4. Connect the test leads to the device.
5. Read the forward voltage drop on the digital display. If the digital display reads OL, reverse the lead connections. The placement of the leads when the forward voltage is displayed (normally 600 to 900 mV) indicates the orientation of the diode.
The red lead is then connected to the anode and the black lead is connected to the cathode as follows.
If OL is displayed with both lead connections, the junction is open. If a low reading (less than 1 volt) is obtained with both lead connections, the junction is shorted internally, or, (if the junction is measured in a circuit) the junction is shunted by a resistance less than 500 ohms. In the latter case, the junction must be disconnected from the circuit in order to verify its operation.
Transistor Junction Tests
Transistors can be tested in the same manner as diodes by checking the two diode junctions formed between the base (B) and emitter (E) and the base (B) and collector (C) of the transistor. Orientation of these effective diode junctions is shown above for PNP and NPN transistors.
To complete the transistor tests, check for shorts between the collector (C) and the emitter (E).
Transistor Beta Test
With the simple test fixture shown above, the Diode Test Function can be used to determine the DC current gain (beta) of a transistor. Beta is measured using a collector-to-emitter voltage (VCE) of about 1 volt and a collector current (IC) of about 2mA.
The transistor beta test setup shown is for an NPN transistor. For PNP transistors, the connections to the multimeter should be reversed. To determine transistor beta, use the following procedure.
1. With all connections made as shown and with switch S1 open, record the displayed reading (disregard the decimal point).
NOTE: If an overload indication is obtained, reverse the connections to the multimeter. If an overload indication is obtained regardless of the connection orientation, or if a reading less than 0.200 is obtained, the transistor is probably defective.
2. Close switch S1 and record the new displayed reading (disregard the decimal point).
3. Divide 2000 by the difference in digits between the readings obtained in Steps 1 and 2. The resulting number is the transistor dc beta.
Continuity Checks Using Insta-Ohms® Feature
1. Place the Function/Range Switch in any Ohms range.
2. Connect the red test lead to the V-Ohms connector and the black test lead to the COM connector.
With the test leads separated or measuring an out-of-range resistance, the digital display will indicate OL (overload) as shown.
3. Place one test lead probe at one end of the cable or circuit to be tested. Use the other test lead to trace the circuit or cable until the circuit is complete. When continuity is established, an Ohms symbol will appear in the upper left corner of the digital display.
If contact in the cable or circuit is maintained long enough (about 1/4 of a second), the OL will disappear and the resistance value of the cable or circuit will appear next to the symbol.
NOTE: The Insta-Ohms® Quick Continuity Indicator is triggered by any resistance less than double the maximum resistance measurable on the selected range. For example, on the 200 Ohms range, the Ohms symbol will appear when less than 400 Ohms is detected by the instrument.
Capacitor Checks
The Insta-Ohms® Quick Continuity Indicator also can be used as an approximate check of capacitors with a value equal to or greater than 0.01 μF, as shown in the following procedure.
1. Put the Function/Range Switch in the 20MOhms range position.
2. Connect the red test lead to V-Ohms connector and the black test lead to the COM connector. With the test leads separated, the digital display will indicate OL (overload).
3. Discharge the capacitor to be checked by briefly shorting the ends together.
4. Put the red test lead probe at one end of the capacitor, and the black test lead probe at the other end of the capacitor.
| NOTICE |
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Do not touch the capacitor leads or test probe ends during capacitor check, because proper operation of the Insta-Ohms® feature could be affected. |
5. If the Insta-Ohms® symbol (Ohms) appears briefly and then disappears, the capacitor is accepting a charge. If the Insta-Ohms® symbol does not appear, reverse the test leads. If the Insta-Ohms® symbol still does not appear, the capacitor is probably open.
If the capacitor is shorted, a low resistance value will be displayed.
Decibel Measurements
In addition to its other functions, both multimeters can be used to measure decibels. The value obtained from the measurement can be used to indicate the gain and accuracy of electronic devices. The decibel (dB) is the logarithm of the ratio of two electrical signals; usually a certain amount of power across a fixed resistance is used as a reference and denoted as 0 (zero) decibels.
In this example, 0dB is defined as 1 milliwatt into 600 ohms. Use the procedure given in the topic entitled AC Voltage to determine the ac voltage and the graph that follows to determine the decibel value.
- 2V Range - Add 20dB20V Range - Add 40dB200V Range - Add 60dB1000V Range - Add 80dB
Maintenance
| NOTICE |
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To prevent electrical shock hazard, turn of the multimeter and disconnect the test leads before removing the back cover. Do not operate the multimeter with the back cover removed except during calibration. |
Battery Replacement (6V-7070)
| NOTICE |
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Failure to turn off the instrument before installing the battery can result in damage to the battery if it is incorrectly connected to the battery terminal. |
1. Disconnect the test leads and turn off the multimeter.
2. Remove four screws (1) and lift off cover (2).
3. Battery (3) is located in the front part of the case.
Remove the 15 Amp fuse (4) to gain access to the battery.
4. Disconnect the battery from the multimeter and replace it with a 1U-9534, 9 volt alkaline battery. Install the 15 Amp fuse.
5. Install cover (2) and secure with four screws (1).
Battery Replacement (6V-7800)
| NOTICE |
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Failure to turn off the instrument before installing the battery can result in damage to the battery if it is incorrectly connected to the battery terminal. |
1. Disconnect the test leads and turn off the multimeter.
2. Remove two screws (1) and remove the battery and fuse cover (2).
3. Remove the battery (3) from the multimeter and disconnect it from the multimeter. Replace it with a 1U-9534, 9 volt alkaline battery.
5. Install cover and secure with two screws.
Fuse Replacement (6V-7070)
1. Disconnect the test leads and turn off the multimeter.
2. Remove four screws (1) and lift off cover (2).
3. Remove the fuse (4) and replace with a 9U-6398 BUSS-type KTK-15 Fuse.
| NOTICE |
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Always replace fuse (4) with a 9U-6398 or a BUSS-type KTK-15 Fuse. Damage to the instrument may result if another type fuse is used. |
4. Remove fuse (4) and battery (3) to gain access to 6V-7803, 2 Amp Fuse (5).
5. Remove the active 6V-7803 2 Amp Fuse (5) by carefully holding battery isolator (6) back and pulling fuse ribbon (7).
6. Install spare 6V-7803 2 Amp Fuse (8) in the active position with fuse ribbon (7) positioned behind the fuse for future removal.
| NOTICE |
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Always replace fuse (5) with a 2 amp, 600 volt (6V-7803) Fuse only, or damage to the instrument may result. |
7. Install battery (3) and fuse (4).
8. Install back cover (2) and install four screws (1).
Fuse Replacement (6V-7800)
1. Disconnect the test leads and turn off the multimeter.
2. Remove two screws (1) and lift off the battery and fuse cover (2).
3. Remove battery (3) to gain access to 6V-7803, 2 Amp Fuse (4).
4. Remove the active 6V-7803, 2 Amp Fuse by holding the case and pulling the fuse ribbon (5).
5. Install spare 6V-7803, 2 Amp Fuse in the active position with the fuse ribbon positioned behind the fuse for future removal.
| NOTICE |
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Always replace the fuse with a 2 amp, 600 volt (6V-7803) Fuse only, or damage to the instrument may result. |
6. Install battery (3).
7. Install the back cover.
Fuse Replacement For 6V-7801
1. To change the fuse, grasp the narrow hexagon portion (1) of the inline fuse holder in one hand and the larger hexagon end (2) in the other hand.
2. Turn the fuse holder ends counterclockwise (CCW) to expose 6V-7802, 10 Amp Fuse (3).
3. Use the multimeter with standard test leads to check resistance of the fuse. If the fuse is good, it will measure less than 1 ohm resistance. If it is open (blown), the meter will show OL on the display.
4. If the fuse checks good, install it. If it is open (blown), install a new 6V-7802 or Buss-type KTK-10 Fuse.
| NOTICE |
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Always replace the fuse with a 6V-7802 or Buss-type KTK-10 Fuse, or damage to the instrument may result. |
5. Slide the fuse into the multimeter end of the fuse holder and thread the two fuse holder halves together.
NOTE: The 6V-7801 Fused 10 Amp Test Lead should only be used with multimeters without internal fuses.
Calibration
In order to maintain the specifications shown in the section entitled Specifications, it is recommended that the multimeter be calibrated once a year, and also after it is repaired.
To calibrate the multimeter, use a DC Calibrator with a voltage range of 0 to 1000Vdc and an accuracy of ± 0.025% (recommended model - Wavetek 9000 or equivalent).
NOTE: If the necessary equipment is not available, calibration service is available from the Wavetek Corporation Service Center for a fee. Instrument calibration performed at Wavetek is traceable to the National Institute of Standards (NIST).
For this service, refer to the topic entitled Shipping Instructions in the Warranty information section at the back of this instruction.
1. Perform calibration at an ambient temperature of 25 ± 2°C (77 ± 4°F) and a relative humidity of 80% or less. Allow the instrument to stabilize at this temperature for at least 30 minutes.
2. Remove four screws (1) and cover (2).
3. Set the output of the DC calibrator for 190mV ± 0.02% and connect the calibrator to the V-Ohms and COM Input Connectors.
4. Turn the Function/Range Switch on the multimeter to the 200mV DCV position.
5. Using a small flat-tipped screwdriver, adjust potentiometer (3) until the multimeter digital display reads + 190.0 or + 190.1.
6. Disconnect the DC calibrator from the multimeter.
7. Install the back cover and four screws.
Cleaning the Case and Window
| NOTICE |
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Do not use aromatic hydrocarbons or chlorinated solvents for cleaning. These chemicals will react with the plastics used in the construction of the case. |
To clean the front panel and case, use a mild solution of detergent and water. Apply sparingly with a soft cloth and allow to dry completely before using.
Storage
| NOTICE |
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If the multimeter is to be stored at temperatures above 50°C (122°F), always remove the battery. |
Troubleshooting
Except for the replacement of the battery and fuses, repair of the multimeter during the one year warranty period should be performed only by the Wavetek Service Center. If the instrument is not performing properly, the following steps should be taken before returning the multimeter for warranty repair.
1. Check the battery, fuse and fuse connections.
2. Check to see that the Function/Range Switch is in the correct position for the type and range of values to be measured, and that the measurement value is within the capability of the instrument.
3. Review and comply with the operating instructions shown in the section entitled Tests and Measurements.
4. Inspect the test leads for continuity and the insulation for breaks or cracks. Make sure the test leads are fully inserted into the input connectors.
5. Check to see that the ambient environment in which the instrument is being used is within the specifications of the instrument.
6. If the decimal point is blinking, the battery is probably low. Install a new battery using the procedure shown in the topic entitled Battery Replacement in this instruction.
7. If the digital display is blank with the unit turned on, the battery is probably dead. Install a new battery as shown in the topic entitled Battery Replacement in this instruction.
8. If operation of the instrument is normal in all functions and ranges except ac and dc current, the fuse or fuses have probably blown. Replace the fuse or fuses as shown in the topic entitled Fuse Replacement in this instruction.
Warranty
Warranty Repair
Multimeters less than one year old will be repaired under warranty for a handling charge of $5.00 within the continental U.S.A. and $12.00 elsewhere, except for abuse. Any multimeter claimed to be defective should be returned to one of the Service Centers listed in the topic entitled Service Centers in this instruction.
Warranty repair will be made typically within two (2) weeks after the defective unit is received. (Prices subject to change without notice.)
Non-Warranty Repairs
Any out-of-warranty instrument that is defective but repairable can be repaired by a Wavetek Service Center. The repaired unit will carry a 30 day warranty on parts only.
Repairs made at the Wavetek Factory Service Center are at a $65.00 flat rate, plus $6.00 shipping and handling. (Prices subject to change without notice.)
Wavetek Corporation Warranty
The 6V-7070 and 6V-7800 Digital Multimeters are warranted in their entirety against any defects of material or workmanship that develop for any reason whatsoever, except for abuse, within a period of one (1) year following the purchase of the multimeter by the original purchaser. Proof of purchase date is required.
This warranty is extended by Wavetek Corporation only to the original purchaser or original user of the multimeter.
If a defect develops during the warranty period, Wavetek will, at Wavetek's election, repair or replace the multimeter with a new or reconditioned model of equivalent quality.
To obtain performance of any obligation of Wavetek Corporation under warranty, the original purchaser or original user must return the defective multimeter, postage prepaid, along with the proper handling charge, to one of the Wavetek Service Centers given in this instruction.
Any implied warranties arising out of the sale of the 6V-7070 or 6V-7800 Multimeters, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited in duration to the above stated one (1) year period. Wavetek Corporation shall not be liable for loss of use of the multimeter or other incidental or consequential damages, expenses, or economic loss.
U.S.A. Customers
Some states do not allow limitations on how long implied warranties last or the exclusion or limitations of incidental or consequential damages, so the above limitations or exclusions may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.
Shipping Instructions
Multimeters returned for repair or calibration should be shipped with the following information or items: Company name, the name, address, and telephone number of the customer, proof of purchase date (warranty repair), a description of the problem encountered or service required, test leads, and the appropriate service charge.
Service charges should be remitted in either the form of a check, money order or purchase order made payable to Wavetek Corporation.
Service Centers
9045 Balboa Ave
San Diego, CA 92123
Telephone: (619) 495-3200
Attention: Instrument Repair/Service
Wavetek Ltd.
Hurricane Way
Norwick, NR6 6JB
England
Telephone: (44/603) 404824
Attention: Instrument Repair/Service