Frequency measurement
Turn the switch knob to Hz range. Insert one end of the red pen into the jack of
“V/
Ω
/mA /Hz/CAP” and one end of the black pen into the jack of “COM”.
Connect the other end of the two pens in parallel to the to-be-tested circuit and
read the frequency value.
Sensitivity of the frequency range is approx. 2V RMS.
Attention:
1. In an environment with strong noise, it is better to use shielded cable when
perform small single measurement.
2. When the frequency amplitude under test is larger than 50V, please press
“SELECT” key in the “ACV” range to enter frequency function, and then make
the measurement. When high voltage frequency is measured in this method, the
meter can bear voltage with a peak value up to 1000V, which can prevent the
meter from being damaged when the voltage amplitude is too high. The meter
can automatically attenuate the voltage under test to an optimal amplitude value
that ICs can handle and has good antijamming ability.
Auto power off
the meter is turned off automatically in approx. 15 minutes After it is turned on
if no key is pressed and the rang switch knob is not operated.
Attention:
To lengthen service life of the battery, please turn the power off after
use it.
4
VI. Calibrate the meter
Special attention: Do not enter calibration mode before read the
operating instructions. Otherwise, calibration data stored in the meter
might be lost and normal measurement can be performed with the meter.
I) Key functions of the meter panel in calibration mode:
1-1, Gently touch “DH/BL” key, the buzzer makes a short sound. Here, press
“TEST/STOP” key several times to adjust the display value up; press
“SELECT” key several times to adjust the display value down. Gently
touch “DH/BL” key again, the buzzer makes a long sound. Press
“SELECT” key or “TEST/STOP”key to restore the initial function. Press
and hold “DH/BL” key until the buzzer makes two sounds and the current
adjusted result is saved. In calibration mode, “DH/BL” key has no data
hold and backlight control function.
1-2, “TEST/STOP” key: it is high voltage switch or used to adjust display
value up, depending on “DH/BL” key.
1-3, “SELECT” key: it is function switch or used to adjust display value
down, depending on “DH/BL” key.
II) Three calibration methods are available for the meter:
2-1 Calibrate all ranges of the function. Each range has a standard calibration
point.
Except that DC1000V and AC700V range are at “500V” point, all other ranges
are at “1000” point (for example, 10.00uF point). Select any point, and all
ranges of the function will be calibrated.
2-2, The range can be calibrated at any range of any function. Operation result
only affects the present range, the same as in 2-1. Attention: The two
methods above mentioned are only applicable to advanced users.
2-3, The range can be calibrated at any point of any range of any function.
Even if the user doesn’t have signal source that outputs standard points
required by the meter, the user can monitor the input value of the
to-be-calibrated meter with the monitoring meter, as long as the use has a
monitoring meter over Level 0.2. Use keys on the panel of the to-be-calibrate
meter to adjust the meter until the displayed value of the meter under
calibration is the same as that of the monitoring meter.
III) Select and enter an adjustment mode according to requirements – three
methods are available:
3-1
Turn the switch knob to “OFF” position. Press and hold DH key and then
turn the switch knob to the to-be-adjusted range. Release DH key after you
hear “di”- “di” sounds. Here, the meter enters 2-3 calibration mode.
3-2
Turn the switch knob to “OFF” position. Press and hold DH key and
“SELECT” simultaneously and then turn the switch knob to the
to-be-adjusted range. Release the keys after you hear “di”- “di” sound.
Here, the meter enters 2-2 calibration mode.
3-3
Turn the switch knob to “OFF” position. Press and hold DH key and
“TEST/STOP” key simultaneously and then turn the switch knob to the
to-be-adjusted range. Release the keys after you hear “di” -“di” sound.
Here, the meter enters 2-1 calibration mode.
IV) Examples of calibration:
4-1 Use Method 2-3 to calibrate AC current range: Insert one end of the red pen
into the jack of “V/
Ω
/mA” and connect the other end to positive output
terminal of the calibration source. Insert one end of the black pen into the
jack of “COM” and connect the other end to negative output terminal of the
calibration source. When enter calibration mode, turn the switch knob to
“mA” range. Press “SELECT” key to select AC current measurement mode.
Gently tough “DH/BL” key and the meter makes a short sound. Here,
“TEST/STOP” key and “SELECT” key can be used to adjust display value
of the to-be-calibrated meter. When the calibration output current is AC
10mA, adjust display of the calibrated meter to “10.00”. Press and hold
“DH/BL” key until you hear “di”-“di” sound. AC 10mA range is calibrated.
If use Method 2-3 to calibrate AC 100mA range, just need to increase the
calibration current to 100mA. The meter automatically switches to AC
100mA range. Adjust display of the calibrated meter to “100.0”. Then,
press and hold “DH/BL” key until you hear “di”-“di” sound.
4-2 The voltage output of high voltage generator of the mega-ohm range is set up
in the factory and adjusted through resistance, but not through software
！
4-3 Use Method 2-1 to adjust measurement voltage of mega-ohm range: Insert
one end of the test pen of the with high voltage test bar into L terminal
socket of the meter. Insert one end of the red pen into the jack of “L” and
connect the other end to negative output terminal of the calibration source.
Insert one end of the black pen into the jack of “COM” and connect the other
end to positive output terminal of the calibration source (the red is negative
and the black is positive. Do not make mistake. Otherwise, the internal
circuit would burn
！
！！
). When enter calibration mode, turn the switch knob
to 1000V or 2500V voltage range for mega-ohm measurement. Without
turning high voltage in the to-be-calibrated meter, calibration source outputs
DC 1000V voltage. Positive voltage is applied to “COM” input terminal of
the to-be-calibrated meter, and negative voltage is applied to its “L” terminal.
After the display is stable, press and hold “DH/BL” key.
4-4
Use Method 2-1 to calibrate resistance value of the mega-ohm range: Insert
one end of the test pen with high voltage test bar into L terminal socket of
the meter. Insert one end of the test cable with test clamp into “E” terminal
socket of the meter. Insert one end of the test cable with black test pen (the
pen with a clamp) into of G terminal socket of the meter. Set output
resistance of the resistance box to 100 mega-ohms. Press “SELECT” key to
select one minute for the timer. Turn on high voltage of the to-be-calibrated
meter and output high voltage value is displayed in voltage meter of the
mage-ohm meter. After the display of the meter under calibration is stable,
press and hold “DH/BL” key. After the buzzer makes two sounds, all
mega-ohm ranges under the measurement voltage are calibrated (Attention:
in calibration mode, do not press “DH/BL” key when the high voltage is not
turned on. Otherwise, high voltage calibration value would be lost).
4-5
No calibration is needed for the frequency range. DC4V range is will be
referenced automatically for diode range when DC4V range is calibrated.
400
Ω
resistance range will be referenced automatically for ON-OFF range
when 400
Ω
resistance range is calibrated.
4-6
After calibration of various ranges is completed, it is necessary to turn the
meter off and restart it before the adjusted values take effect.
Special attention: the user who doesn’t have calibration conditions
should not make the calibration.
VII
．
Maintenance of the meter
Warning
！
It is necessary to turn the power off and disconnect test
pens before open the case of the meter or battery cover to prevent
danger of electric shock.
1. When the sign “
- +
” is displayed in the meter, the battery needs to be
changed. Open the battery cover, and replace the old battery with a new
one of the same type to ensure the meter works normally.
2. To protect internal circuit of the meter, it is necessary to replace the fuse with
one of the same specifications when the fuse in current range is burned.
Specifications of the fuse used in the series meters is: F 500mA/250V(fast). Be
sure to turn the switch knob to OFF position before open the bottom cover to
prevent high-voltage electric shock.
3. Keep the meter and the test pens clean, dry, and undamaged. Use a clean cloth
or eradicator to clean the case of the meter. Do not use abrasive or organic
solvent.
4. Avoid mechanical damage, shock, and impact; avoid exposure to high
temperature and strong magnetic field.
VIII. Accessories
1. Test cable: one set, including one red high voltage test pen, one black test pen,
one black test cable (with a clamp), and one test clamp.
2. Operating instructions: one copy
3. Conformity certificate/Warranty card: one piece
Please visit
www.multimeterwarehouse.com
to see the update and more. All the
specifications are subject change without previous notes.
Tel: 909 628 6088,Fax: 909 628 7999, email: [email protected]
