• Temperature sensor. only applicable to K type temperature sensor.
• Switch to select temperature tap position.
• Input end open circuit instrument displays OL, and displays ambient temperature in case of short circuit.
• Connect to K type temperature sensor with black probe into COM end and red probe into °C end to measure 0
( or °F values. °F=1.8°C +32 Caution:
K type (nickel-chromium to nickel-silicon) point thermocouple temperature sensor configured is only applicable
to measurement of temperature below 230°C/446°F. Measuring of higher temperature shall be performed with
K type temperature sensor with applicable measuring range.
6. Other Functions
• Holding the HOLD key for 2 seconds to turn on or off LCD backlight. e Auto-OFF If the knob switch is not
operated for 15 minutes during the process of measuring, the instrument will start “Auto-OFF” to save energy.
During auto-OFF status, click any key to wake up the instrument, or turn the knob switch to OFF and restart it
again. Auto-OFF means that the instrument enters super-low power consumption status.
• Stop auto-OFF: Hold SELECT key, and then connect and start the instrument, 5 times of buzzing will be given
out to prompt that the autoOFF function will be cancelled. The auto-OFF function will be resumed when the
instrument is switched off and then restarted.
• The buzzer will give out 5 times of alarm around 1 minute before starting auto-OFF status, and give out 1 long
alarm before power-off. When auto-OFF function is cancelled, the
buzzer will give out 5 times of alarm every 15 minutes.
• Buzzer: buzzer will give out a short “beep” (about 0.25 second) if pressing any key or switching to valid
functions. In tap positions, if the tested circuit is in sound conductivity
(<,;100), the buzzer will keep ringing. When the measured AC/DC voltage is higher than 600V or current is
higher than
200A, the buzzer will also give out continuously interrupted “Beep” sound to warn against over-range.
• Low voltage detection: when the voltage is lower than 2.5V, low battery symbol “a” will be displayed, when
measuring accuracy might be reduced, and new battery shall be used
in time. If the voltage is lower than 2.2V, the instrument will only show low battery symbol after starting, but will
not work.
• When battery supply voltage is reduced to 2.6V, LCD backlight will be dim or cannot be started, but measuring
function can still be available.
IX. Technical Indexes
Accuracy: ±(a% reading+b word count), warranty period is 1 year Ambient temperature: 23°(±5°( (73.4 °F±9°F),
relative humidity: ~75%
1. Measuring of DC Voltage
Voltage input impedance: about 1 OMO. (Due to the high input impedance, instable digit might be
displayed in open circuit with 200mV measuring range, but such digit will be
able to be measured stably in case of connection to tested source with internal resistance of lower than 1 O
MO; however, the influence of measured source on measuring reading
shall be considered.)
Maximum voltage input: ±600V
2. Measuring of AC Voltage
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