7
- Forward DC Current approximate 1mA Reversed DC Voltage approximate 1.5V
- Overload Protection: 250V DC or rms AC
3.2.14 Continuity
Range
Function
Built-in buzzer will sound, if resistance is lower than 40
Ω
- Open circuit voltage approximate: 0.5V
- Overload Protection: 250V DC or rms AC
4. OPERATING INSTRUCTION
4.1 DATA HOLD
If you need data hold when measuring, you can put on “HOLD”, it will hold the reading; if you put the button again,
data hold will not continue.
4.2 FUNCTION TRANSFORM
Put down the "FUNC" when measuring the current and voltage. Meter will be transformed between DC and AC
range. Put "FUNC" when measuring the resistance, capacitance, diode and continuity, meter will transform among
them.
4.3 RANGE TRANSFORM
The auto range is used when measuring the current, voltage and resistance. Put down the "RANGE" if the manual
range is needed. Each time you put down, range will go upward; the minimum range is transformed if "RANGE" is
put down at the maximum range. If the "RANGE" is put down more than two seconds, auto range is used again
4.4 HZ/DUTY TRANSFORM
•
Put down the "Hz%." when measuring the Hz range. Meter will be transformed at DUTY range. Press the "Hz%"
again, meter will recover the Hz range.
•
When measuring at the voltage range and current range, put down the " Hz%" to be Hz range and the frequency
of the signal for the voltage and current are measured then. Press the " Hz%" again to be the DUTY range and the
DUTY CYCLE of the signal for the voltage and current are measured then. Press the " Hz%" again, meter will be
back to the condition of the voltage and current measuring. The range of voltage and current are locked under this
condition, which can be cancelled by rotating the transform switch or put down the "RANGE”.
4.5 RELATIVE TRANSFORM
When measuring, put down the "REL.", meter will be transformed at relative measuring, initial display will
show ”000”; press the "REL" again, meter will recover the normal working condition. This cannot be used under “0L”
condition.
4.6 BACK LIGHT
If the light is too dark to make the reading difficult when measuring, you can press the ”LIGHT” button to open the
back light.
NOTE:
•
LED is the main source of back light. Its working current is large, although the meter has the timer equipment
(time is 5 seconds and it will off automatically after 5 seconds); often use back light will shorten the battery life,
you’d better not to use the back light so frequently if it’s not necessary.
•
When the battery voltage is less than 7V, it will show “
”. But if you use back light at the same time, maybe “
”
will come up even if the battery voltage is more than 7V, because the working current is higher and the voltage will
decline. (When “
“shows, the accuracy of the measurement cannot be assured.) You need not replace the battery.
When you use normally (back light is not using), “
” will not show up. You need replace it till “
”show again.
4.7 AUTO POWER OFF
•
If there’s no any operation within fifteen minutes after power is on, meter will auto power off with five short sounds
and a long sound in a minute.
•
After auto power off, if stir the transform switch or put down any button of “HOLD”
、
“FUNC”
、
”RANGE”
、
”Hz%”
、
”REL”, meter will recover the working condition.
•
If presses the “FUNC” when power is on, auto power off disable.
4.8 PREPARATION FOR MEASUREMENT
4.8.1 Turn the transform switch. If the battery voltage is less than 7V, display will show “
”, the battery should be
changed at this time.
4.8.2 The “
” besides the input lead shows that the input voltage or current should be less than specification on the
sticker of the meter to protect the inner circuit from damaging.
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Summary of Contents for IMT 7000
Page 1: ...Art 422005 IMT 7000...
