VOLTCRAFT VC-655 Digital Multimeter User Guide

VC-655 BT
Digital Multimeter
Quick Guide

 Safety Information

Safety Terms and Symbols
Safety Terms
Terms in this Manual. The following terms may appear in this manual:
Warning: Warning indicates the conditions or practices that could result in injury or loss of life.
Caution: Caution indicates the conditions or practices that could result in damage to this product or other property.
Terms on the Product. The following terms may appear on this product:
Danger: It indicates an injury or hazard may immediately happen.
Warning: It indicates an injury or hazard may be accessible potentially.
Caution: It indicates potential damage to the instrument or other property might occur.
Safety Symbols
Symbols on the Product. The following symbol may appear on the product:

| Direct current (DC)
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| Alternating current (AC)
| Both direct and alternating current
| Ground terminal
| Warning, risk of electric shock
**| Caution, risk of danger (refer to this manual for specific Warning or Caution information)
| Conforms to European Union directives
| Chassis Ground
CATI(10000V)| IEC Measurement Category I. The maximum measurable voltage is 1000 Vpk in the HI-LO terminal.
CATII(10000V)**| IEC Measurement Category II. Inputs may be connected to AC mains power (up to 600 VAC) under Category II overvoltage conditions.
| This product complies with the WEEE Directive (2012/19/EC) marking equipment. The affixed product label indicates that you must not discard this electrical/electronic product in domestic household waste.

General Safety Requirements
Before any operations, please read the following safety precautions to avoid any possible bodily injury and prevent this product or any other products connected from damage. In order to avoid any contingent danger, this product is only used within the range specified.

• Use Proper Power Cord. Use only the power cord supplied with the product and certified to use in your country.
• Product Grounded. This instrument is grounded through the power cord grounding conductor. To avoid electric shock, the grounding conductor must be grounded. The product must be grounded properly before any connection with its input or output terminal.
•  The limit operation to the specified measurement category, voltage, or amperage ratings.
• Check all Terminal Ratings. To avoid instrument damage and the risk of electric shock, check all the Measurement Limits and markers of this product. Refer to the user’s manual for the Measurement Limits before connecting to the instrument. Do not exceed any of the Measurement Limits defined in the following section.
• Do not operate without covers. Do not operate the instrument with covers or panels removed.
• Use Proper Fuse. Use only the specified type and rating fuse for this instrument.
• Avoid exposed circuits. Do not touch exposed junctions and components when the instrument is powered.
• Do not operate if in any doubt. If you suspect damage occurs to the instrument, have it inspected by qualified service personnel before further operations.
•   Use your instrument in a well-ventilated area. Inadequate ventilation may cause increases in temperature or damages to the device. Please keep well ventilated and inspect the intake regularly.
• Do not operate in wet conditions. In order to avoid short-circuiting to the interior of the device or electric shock, please do not operate in a humid environment.
• Do not operate in an explosive atmosphere.
• Keep product surfaces clean and dry.
• Only qualified technicians can implement the maintenance.

Measurement Limits
The protection circuitry of the multimeter can prevent damage to the instrument and protect against the danger of electric shock when the Measurement Limits are not exceeded. To ensure safe operation of the instrument, do not exceed the Measurement Limits shown on the front panel, it is defined as follows:

Main Input Terminals Measurement Limits
The Input and COM Input terminals are used for voltage, resistance, continuity, frequency (period), capacitance, diode, and temperature test measurements. The Measurement Limit is defined for these terminals:

• Input to COM Input Measurement Limit
  The measurement limit from Input to COM Input is 1000 VDC or 750 VAC, which is also the maximum voltage measurement. This limit can also be expressed as 1000 Vpk maximum.

Current Input Terminal Measurement Limits

• The measurement limit from 10A input terminal to COM Input terminal is 10 A (DC or AC).
• The measurement limit from μA mA input terminal to COM Input terminal is 600 mA (DC or AC).

Measurement Category
The safety rating of the multimeter:
1000 V, CAT I
IEC Measurement Category I. The maximum measurable voltage is 1000 Vpk in the HI-LO terminal.
600 V, CAT II
IEC Measurement Category II. Inputs may be connected to AC mains power (up to 600 VAC) under Category II overvoltage conditions.
Measurement category definition
Measurement CAT I applies to measurements performed on circuits not directly connected to the AC mains. Examples are measurements on circuits not derived from the AC mains and specially protected (internal) mains-derived circuits.
Measurement CAT II applies to protect against transients from energy- consuming equipment supplied from the fixed installation, such as TVs, PCs, portable tools, and other household circuits.
Measurement CAT III applies to protect against transients in equipment in fixed equipment installations, such as distribution panels, feeders and short branch circuits, and lighting systems in large buildings.
Measurement CAT IV applies to measurements performed at the source of the low-voltage installation. Examples are electricity meters and measurements on primary overcurrent protection devices and ripple control units.

 Quick Start

General Inspection
After you get a new multimeter, it is recommended that you should make a check on the instrument according to the following steps:

1. Check whether there is any damage caused by transportation.
   If it is found that the packaging carton or the foamed plastic protection cushion has suffered serious damage, do not throw it away first till the complete device and its accessories succeed in the electrical and mechanical property tests.

2. Check the Accessories
   The supplied accessories have been already described in the Appendix A: Enclosure of this Manual. You can check whether there is any loss of accessories with reference to this description. If it is found that there is any accessory lost or damaged, please get in touch with our distributor responsible for this service or our local offices.

3. Check the Complete Instrument
   If it is found that there is damage to the appearance of the instrument, or the instrument cannot work normally or fails in the performance test, please get in touch with our distributor responsible for this business or our local offices. If there is damage to the instrument caused by the transportation, please keep the package. With the transportation department or our distributor responsible for this business informed about it, repairing or replacement of the instrument will be arranged by us.

Dimensions

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Foot Stool Adjustment
Unfold the foot stool on the bottom of the multimeter.
Front Panel Overview

DC or AC current measurements
Resistance, continuity, and diode measurements
Capacitance measurements
Frequency/Period measurements
Temperature measurements
4| Power button| Turn on/off the multimeter.
5| Range/Direction Keys|

When the Range softkey is shown on the right menu, you can press the key to switch between auto and manual range. Press  or keys to enable manual range, and increase or decrease the measurement range. When setting a parameter, press to move the cursor, press or keys to increase or decrease the value.

6| Operation Keys
| Run/Stop| Start or stop auto-trigger. When the trigger is stopped, the displayed data will be held.
| Record| Access menus of manual record and auto record.
See page 12, Data Record Function.
| Utility| Set the auxiliary system function, including Language, Backlight, Clock, Default, and Serial port.
| Math| Perform math operations (Max/Min, dB/dBm) on the measurement results.
| Dual| Press this key to display the function list on the right menu, select a function, if the function is supported, the reading will be displayed in the Vice Display.
7| Input Terminals|

Signal input terminals, used for AC/DC current, voltage, resistance, continuity, frequency (period), capacitance, diode, and temperature test measurements.

Rear Panel Overview

16, Appendix C: Line Fuse Replacement.
3| AC Mains Input| AC mains input connector.

User Interface Figure 2- 3 User interface (Single display)

Trigger Mode

Status Icon

Power On

1. Connect the instrument to the AC supply using the supplied power cord.
   Warning:
   To avoid electric shock, the instrument must be grounded properly.

2. Press down the power button at the front panel, the screen shows the boot screen.

Measurement Connections
After selecting the desired measurement function, please connect the signal (device) under test to the multimeter according to the method below. To avoid instrument damage, do not discretionarily switch the measurement function when measuring.

|
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Data Record Function
The data record function includes manual records and auto records. You can use any or both functions to record the data. Manual and automatic records share a table of data stored in internal storage. The maximum number of recorded points is 1000. After collecting the data, it can be exported to the computer.

Manual record: Press the key -> **Manual** -> Save softkey to save current reading to the DB data.
Auto record: Press the key -> **Auto** softkey, after set a number of readings, sample interval, press the **Start** softkey to the DB data.

Manual Record

1. Collect data: Press the front panel key, press the **Manual** softkey. Press the Save the soft key once to save the current reading to the data table by serial number. The icon will show up on the top of the display.
   Note: The measurement function can be switched during manual record. Save only the main display readings.

2. View the manual record: Press the front panel key, press the Manual softkey to display the data table. Press or keys to turn the page.
   Note:
   •When the recording data exceeds the current range, the data will be marked as “overload”.
   •When the relative value operation is enabled, the recorded data is still reading when the relative value is closed.

3. Clear the manual record: Press the Clear soft key to clear all data in the data table.
   (Note: because the manual and automatic records share the same data table, automatic readings are also erased.).

Auto Record

1. Configure the parameters: Press the front panel key, press the Auto softkey.
   Press the Point softkey to specify the total number of readings to record. The range is 1 to 1000.
   Press the Interval softkey to specify the time interval between readings. The range is 15 ms to 9999.999 s.

2. Record data: Press the Start softkey to start auto record. The icon will show up on the top of the display. Press the End soft key to stop recording, the data table shows the readings taken. Press or keys to turn the page.
   Note:
   •Automatic recording function supports switching measurement function.
   •In auto range, the relay switch may cause jitter, the data at this time is invalid. It will last about a few hundred milliseconds, and the data acquired in this period will be marked as “invalid”.
   •When the dual display is enabled, only the reading of the main display function can be saved.

Troubleshooting

1. The instrument is powered on but has no Display.

1. Check if the power is connected properly.
2. Check if the line fuse which is below the AC Mains Input is used appropriately and in good condition (see page 16, Appendix C: Line Fuse Replacement).
3. Restart the instrument after the steps above.
4. If the problem still exists, please contact us for our service.

2. The reading does not change when a current signal is an input.

1. Check whether the test lead is correctly inserted into the current input terminals.
2. Check whether the DCI or ACI measurement function is enabled.
3. Check whether the DCI measurement function is used to measure AC current.

If you encounter other problems, try to reset the settings, or restart the instrument. If it still cannot work properly, please contact us for our service, and provide your device information. (Press the front panel key)

Appendix

Appendix A: Enclosure
Standard Accessories (subject to final delivery):

Appendix B: General Care and Cleaning
General Care
Do not store or leave the instrument where the liquid crystal display will be exposed to direct sunlight for long periods of time.
Cleaning
To clean the instrument exterior, perform the following steps:

1. To prevent electrical shock, disconnect the instrument from AC mains power and disconnect all test leads before cleaning.
2. Clean the outside of the instrument using a wet soft cloth not dripping water. Do not make any scuffing when cleaning the LCD screen. To avoid damage to the instrument, do not use any corrosive chemical cleaning agent.

Caution: To avoid any damage to the instrument, do not expose it to any sprays, liquids, or solvents.

Warning: Before power on again for operation, it is required to confirm that the instrument has already been dried completely, avoiding any
electrical short circuit or bodily injury resulting from the moisture.

Appendix C: Line Fuse Replacement
The line fuse is in the plastic fuse box below the power line input on the rear panel.
Warning: Disconnect the line cord at the rear panel and remove all test leads connected to the instrument before replacing the line fuse. Failure
to do so could expose the operator to hazardous voltages that could result in personal injury or death.
Use only the correct fuse type. Failure to do so could result in personal injury or instrument damage.

To perform the line fuse replacement, follow these steps:

1. Turn off the multimeter, remove all measurement leads and other cables from the instrument, including the power cord.

2. Use a flat-blade screwdriver to remove the fuse box.

3. Replace the fuse with a new one, install it into the fuse box, and push the fuse box back on to the rear panel.

2020.12 V1.0.0

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