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73 N2DYN Angelo
-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Matthew Chao
Sent: Friday, March 13, 2015 8:45 AM
To: [log in to unmask]
Subject: Help with Voltmeter, Please
Hi, Folks. A few years ago, I bought a talking multimeter/voltmeter through
NFB's Marketplace/store. Unfortunately, the only docs that came with it are
in print.Does anyone else on list happen to have one of these items, and if
so, can you give me a rundown of how this thing works, e.g., the selections
for the dial settings and the functions of the two buttons on the unit
itself? Thanks in advance.--Matt, N1IBB.
Nexxtech Digital Multimeter With Voice Readout
Product number: 2218202
Please Read before using this equipment.
Features
Your LCD Digital talking Multimeter is a portable, compact multimeter that is ideal for field, shop, and home applications.
This Multimeter can display up to 4 units. It measures AC voltage up
to 750 V, DC voltage up to 1000 V, and resistance up to 40 M.
The Rubber Case -- Protects the meter.
Low Battery Indicator -- So you can quickly see when you need to replace the battery.
Diode Check Function -- Lets you safely check semiconductors for open, shorted, or normal
junctions.
Full Auto Polarity Operation -- Protects your meter and gives valid measurements even when
you connect the leads in reverse polarity.
Latest IC and Display Technology -- Ensures reliability, accuracy, stability, and ease of
operation.
cUL Listed -- Passes the stringent safety tests required by Canadian Underwriters Laboratories.
Note: Your meter requires three AA batteries (not included) which you must install before using.
Important :
This meter is not designed for commercial, industrial, or outdoor use.
Completely read this manual before you use the meter.
If you are not familiar with multimeters and testing procedures, we suggest you read "
Using Your Meter" before using the meter.
Warnings :
Use extreme caution in use of this device. Improper use of this device can result in injury or death. Follow all safeguards suggested in this user's manual. In addition to normal safety precautions in dealing with electrical circuits. Do not use this device if you are unfamiliar with electrical circuits and testing procedures.
Not for commercial or industrial use.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
To reduce the risk of injury or shock hazard, do not expose this product to rain or moisture.
A Word About Safety
We have taken every precaution in designing this meter to ensure that it is as safe as we can make it. But safe operation depends on you, the operator. We recommend that you follow these simple safety rules.
Never apply voltages to the meter that exceed the limits given in the specifications. Never
apply more than 500V DC or 500V RMS AC between the test leads and ground.
Use extreme caution when working with voltages above 100V. Always disconnect power from
the circuit you are measuring before you connect test leads to high-voltage points.
Never connect to a source of voltage when you select the diode check or resistance measurement function.
Always discharge any capacitors of the circuit under test before you attach test leads.
Always turn off power and disconnect the test leads from the circuit you are testing before you replace the meter's batterys.
Never operate the meter unless its battery compartment cover is fully closed with the screw fully tightened.
This equipment is rated for installation category II1.
Because many AC/DC sets have a potentially hot chassis, be sure the top of your workbench
and the got underneath it are made of non-conductive materials.
This meter is fully calibrated and tested. Under normal use, no further adjustment should be necessary.
If the meter requires repair, do not try to adjust it yourself. Take it to your local electronics store.
Special panel markings
For your safety, we have added special markings to the meter's panel to remind you of the
measurement limitations. The maximum voltage that can be measured is 500 volts RMS AC or
500 volts DC. Refer to the complete operating instructions. To avoid electrical shock or instrument
damage, do not connect the test leads to any source that exceeds 500 volts with respect to earth ground. DC 500V/AC 500V MAX.
Caution: Risk of electric shock! Refer to the complete operating instructions.
Caution: Be extra careful when making high voltage measurements DO NOT TOUCH TERMINALS OR PROBE ENDS.
Selector switch
An eight-position rotary selector switch gives access to the following
quantities:
Editers note: they are in order from left to right in a clock wise sequence.
DCV
ACV
OHM/DIODE/CONTINUE
Capacitence
Frequency in HZ
DC/AC mA (current)
Keys
"Hold" key:
A short press will x the display on
the current value and hold it, A
second short press returns multimeter to normal mode, The key
is operative in all ranges,
"Function" key:
To select the function for the meter, press the function key, This key is
operative in DC V/AC V, OHM/
DIODE/BEEP and DC/AC mA
functions.
"Rel" key:
Backlight °
Key
Relative measurement. This key is operative in DCV, ACV, CAP ranges.
"Backlight" key:
Press the key, a brief beep will be heard, then the LCD and test lead will be lit for 30 seconds. If
the user turns this key to the lock position, the meter will light until it is released by the user. This key is operative in all functions.
"Talking" key:
Pressing this key will cause the meter to announce the test result. If the user turns this key to lock the position, the meter will talk until it is released by the user. This key is operative in all functions. Note: Capital and Frequency tests will occasionally take more time to be announced by the meter.
"TalkingBack Light" key:
This key is on the RED test-lead, Pressing this key for less than 1.5 seconds and the meter will
announce the result. If the key is held for more than 1.5 seconds, the meter will be lit for 30 seconds. This key is operative in all ranges. Talking / Back Light Key
Display LCD 3 3/4 -digit digital display
Range Control Auto/Manual Renge
Low Battery Indicator
Input Impedance 16 M ohm (DC V/AC V)
Polarity Automatic
Over range Indication O L (decimal point oaringe
Continuity Beeper Continuity 35ohm + 5 ohms
Warning: The maximum input limit for voltage measurement is 1000V DC and 750V AC (RMS). To
avoid electrical shock and damage to the meter, never try to measure a DC voltage above 1000
volts or an AC voltage above 750 volts RMS.
Over Voltage Protection 1000V DC/750V AC
Operating Temperature 32 to 109 ° F
(0 to 43° C)
Storage Temperature - 4 to 140 ° F
(- 20 to 60 ° C)
Relative Humidity 80% (maximum)
Power Source 3 AA batteries
Power Consumption 112.5 mW (Typical)
Dimensions (HWD) 6.14" x 3.15" x 1.4" (156 X 80 X 35 mm)
Ranges: max, min resolution
Editors note: ranges are in the clock wize configuration from left to right in sequential order acording to the positions that the check functions appear on the selecter control.
DC Volts
Range
Max. Reading
Resolution
Accuracy
1000 Volts
999 Volts
1 Volt
0.7 % FS, +8 Counts
400.0 Volts
399.9 Volts
100m Volts
0.5 % FS, +8 Counts
40.00 Volts
39.99 Volts
10m Volts
0.5 % FS, +8 Counts
4.000 Volts
3.999 Volts
1 m Volts
0.5 % FS, +8 Counts
4000.0m Volts
399.9m Volts
100u Volts
0.5 % FS, +8 Counts
AC Volts
Range
Max. Reading
Resolution
Accuracy
750 Volts
999 Volts
1 Volt
1.8 % FS, ±5 Counts
400.0 Volts
399.9 Volts
,100m Volts
1.8 % FS, +5 Counts
40.00 Volts
39.99 Volts
10m Volts
1.8 % FS, +5 Counts
Resistance
Range
Max. Reading
Resolution
Accuracy
40.00 M
39.99 M
10 K
1.0 % FS, +5 Counts 1
4.000 M
1 K
1.0 % FS, +5 Counts 1
3.999 M
399.9 K
400.0 K
100
1.0 % FS, +5 Counts 1
40.00 K
39.99 K
10
1.0 % FS, +5 Counts 2
4.000 K
3.999 K
1
1.0 % FS, +5 Counts 2
400.0
399.9
100 m
1.0 % FS, +5 Counts 2
Capacitence
Range
Max. Reading
Resolution
Accuracy
100.0 uF
99.9 uF
100 nF
Reference
51.20 uF
51.19 uF
10 nF
1.0 % FS, :1:10 Counts
5.120 uF 5.119 uF
1 nF
1.0 % FS, +10 Counts
512.0 nF
511.9 nF 100 pF
1.0 % FS, +10 Counts
51.20 nF
51.19 nF
10 pF
1.0 % FS, +10 Counts
Frequency
Note: Normal Sensitivity 50 mV rms, 10 MHz sensitivity 1.0 V rms.
Range
Max. Reading
Accuracy
10.00 MHz
10.00 MHz
1.0 %, +2 Counts
5.000 MHz
5.000 MHz
1.0 %, +2 Counts
500.0 KHz
500.0 KHz
1.0 %, +2 Counts
50.00 KHz
50.00 KHz
1.0 %, +2 Counts
5.000 KHz
5.000 KHz
1.0 %, +2 Counts
500.0 Hz
500.0 Hz
1.0 %, +3 Counts
50.00 Hz
50.00 Hz
1.0 %, +2 Counts
DC Current
Range
Max. Reading
Resolution
Accuracy
400.0 mA
399.9 mA
0.1 mA
1.2 % FS, + 8 Counts
40.00 mA
39.99 mA
0.01 mA
1.2 % FS, + 8 Counts
A C Current
Range
Max. Reading
Resolution
Accuracy
400.0 mA
399.9 mA
0.1 mA
2.0 % FS, + 8 Counts
40.00 mA
39.99 mA
0.01 mA
2.0 % FS, + 8 Counts
Installing the battery
Your meter requires 3 AA batteries (not included).
To avoid electrical shock, disconnect both of the meter's test leads from any equipment before you install or remove the meter's batterys.
Do not operate your meter until the battery is properly installed and the battery compartment cover is in place and secured.
Caution: Use only a fresh battery of the required size and recommended type.
1. Set the selector to OFF.
2. Use a Phillips screwdriver to loosen the screws in the battery compartment cover then lift offthe cover
3. Place the battery In the compartment as Indicated by the
polarity symbols (+ and -) marked inside.
4. Replace the cover and secure it with the screws.
When r?c] appears on the display, the display dims, or the meter does not seem to measure
accurately, replace the battery, If the battery power is extremely low, does not display.
Warning: Dispose of old batteries promptly and properly. Do not bury or burn them.
Caution: Always remove an old or weak battery. Batteries can leak chemicals that can destroy
electronic parts. If you are not going to use the meter for a few weeks, remove the batterys.
USING THE METER
Caution: Do not try to measure voltage greater than 1000V DC/750V RMS AC.
To use the meter, open the meter's case by pulling the tabs on the case in
opposite directions. Then unwind the test leads from inside the cover.
Rotate the selector to the function you want to use. Then connect the test leads to the circuit you
want to measure, See the unit of measure on the front of the meter to distinguish the range. For example, DC V includes we ranges; 400 my, 4V, 40, 400 and 1000.
Caution: IfOL appears when you are measuring voltage, the value you are measuring exceeds
the meter's maximum range, Immediately disconnect the probes from the circuit or your meter
might be damaged. Also, note the position of the decimal.
Making measurements
Measuring DC/ AC Voltage
Warning: The maximum input limit for voltage measurement is 1000V DC and 750VAC (RMS). To
avoid electrical shock and damage to the meter, never try to measure a DC voltage above 1000
volts or an AC voltage above 750 volts RMS.
Follow these steps to measure DC or AC voltage:
1. Set the selector to DC V to measure DC voltage or set AC V to measure AC voltage.
2. Connect the test leads to the circuit you want to test.
3. If you want the meter to announce the test result, press the switch on the red test lead
for less than 1.5 seconds. If you want the meter to be alluminated press the switch on the red test lead for more than 1.5 seconds, and the meter will be lit for 30 seconds.
Measuring AC Voltage Riding on a DC Source Bias
To measure an AC voltage superimposed on a DC voltage source bias, you must first measure the DC and AC voltages separately, then compute the peak voltage using this formula:
AC voltage - + Peak voltage - DC voltage .707
Editors note: sorry this formula just did not come out right on the scanner.
Warning: To avoid injury to yourself or damage to your meter, never try to measure an AC voltage that is riding on a DC source bias where the peak voltage exceeds 500 V with respect to earth ground.
Caution: Never try to measure any voltage more than 30V AC on a DC source bias.
Follow these steps to measure AC voltage:
1. Set the selector to DC V.
2. Connect the test leads to the circuit you want to test. The display shows the DC voltage.
3. Disconnect the test leads from the circuit.
4. Set the selector to AC V.
5. Connect the meter's test leads again to the same circuit you tested in Step 2. The display
shows the AC voltage.
6. To compute the peak voltage, refer to the formula seen above.
Measuring resistance
The resistance measuring circuit in your meter compares the voltage gained through a known
internal resistance with the voltage developed across an unknown resistance.
Warning: Be sure the circuit under testing has all power removed and any associated capacitors are fully discharged before you make a resistance measurement.
1, Set the selector to OHM/DIODE/CONTINUE.
Caution: Your meter has a circuit to protect the resistance range from over-voltage. However, to prevent accidentally exceeding the protection circuit's rating and to ensure a correct measurement, never connect the test leads to a source of voltage while the selector is set to OHM/DIODE/CONTINUE.
Note:
1, If there is no resistance connected across the test leads or the measured value exceeds the range you set, O L appears when you set the selector to OHM. This is normal.
2, Connect the test leads across the circuit you want to measure. Or, remove one of the
component's leads you want to measure from its circuit and connect the test leads across the
component. The meter displays the reading in the chosen range.
3. If you want the meter to announce the test result, press the switch on the red test lead for less than 1.5 seconds. If you want the meter to be alluminated, press the switch on the red test lead for more than 1.5 seconds, and the meter will be lit for 30 seconds.
Checking diodes
This measurement lets you check diodes, transistors, and other semiconductors for opens, shorts, and normal operation, It also lets you determine the forward voltage for diodes. (This is handy when you need to match a diode).
Caution: Do not connect the test leads to a source of voltage when you set the selector to Diode. This could damage the meter or circuit being tested.
1. Position the selector switch on the OHM/DIODE/CONTINUE and press the "FUNCTION" key.
to change the meter to the diode function.
2. Remove power from the circuit under test.
3. Connect the test leads across the circuit you want to measure, or remove one of the
component's leads you want to measure from its circuit and connect the test leads across the
component. Then note the value
4. Reverse the test leads and note the second reading.
In a circuit, a good diode should till forward-bias reading of 0,5V to 0.8V; however, the reverse bias reading can vary depending on the resistance of other pathways between the probe tips.
Note:
1. The values that appear during the diode check show the actual forward voltage (max. 1.5V).
2. If you want the meter to announce the test result, press the switch on the red test lead
for less than 1.5 seconds. If you want the meter to be alluminated, press the switch on the red test lead for more than 1.5 seconds, and the meter will be lit for 30 seconds.
Continuity Sound Test
Position the selector switch on the OHM/DIODE/CONTINUE and press the "FUNCTION "key to
change the meter to the continuity function.
Audible beep when R<35 ohm.
Cap Test
Position the selector switch on the "CAP" function. Press the "REL" key to make the meter =zero".
Automatic range selection: Read the measured value. The capacitance should be discharged
before the test. Hold, if necessary, by pressing the "HOLD" key.
If you want the meter to announce the test result, press the switch on the red test lead for less than 1.5"seconds. If you want the meter to be alluminated, press the switch on the red test lead for more than 1.5 seconds, and the meter will be lit for 30 seconds.
Frequency Measurement
Position the selector switch on the "Hz" function.
Automatic range selection: Read the measured value. Hold, if necessary, by pressing the
"HOLD" key. If you want the meter to announce the test result, press the switch on the red test lead for less than 1.5 seconds. If you want the meter to be alluminated, press the switch on the red test lead for more than 1.5 seconds, and the meter will be lit for 30 seconds.
Note: Because of high sensitivity in this function, the meter will catch a signal and will display the number with the test-leads open.
Maintenance
Care
Your LCD Digital Multimeter is an example of superior design and craftsmanship. The following suggestions will help you care for the meter so you can enjoy it for years.
Keep the meter dry. If it gets wet, wipe it dry immediately. Liquids might contain minerals that can corrode the electronic circuits.
Use and store the meter only in normal temperature environments. Temperature extremes can
shorten the life of electronic devices, damage batteries, and distort or melt plastic parts.
Handle the meter gently and carefully. Dropping it can damage the circuit boards and case and can cause the meter to work improperly.
Use only fresh batteries of the required size and type. Always remove old or weak batteries, They can leak chemicals that destroy electronic circuits.
Modifying or tampering with the internal components can cause malfunction and may invalidate the warranty.
If your meter is not performing as it should, take it to your local electronics store for assistance.
Cleaning
To keep the meter looking new, occasionally wipe it with a cloth slightly dampened with water. Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the meter.
Warnings:
Do not let any water drip inside the meter while cleaning it.
Make sure that the meter is completely dry before using it.
Editors note:
I have omitted the warranty section
This product Manufactured in China
For product support please contact www.orbyxelectronics.com
or 1-866-363-3059
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