DIGIOHMpro
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3. MEASUREMENTS
3.1. Turning the instrument on and off, standby, auto power off
Hold the
START
key pressed until the device turns on.
The instrument is turned off after two short pressing/releasing the
START
key.
The instrument enters standby mode (reduced display brightness) after short
time of inactivity (no key pressed, no voltage applied on the test tips).
From standby mode (to full display brightness), the instrument enters after
pressing any key or by applying the voltage on the test tips.
Auto power off occurs when the instrument is idle (no key pressed, no voltage
applied on the test tips) for about a minute.
After turning off the device can be switched on again after about 1s.
3.2. Notes and principles applicable to all measurements
•
Use only charged NiMH batteries, or the quality alkaline batteries. If you see
a low battery indicator or if there are other problems, for example
spontaneous shutdown of the instrument, display flickers, malfunction of
control keys etc., insert new fully charged NiMH batteries, or the quality
alkaline batteries. See chapter 4.1 for instructions how to do it.
•
If the device measures the voltage and if resistance is not measured, check
the fuse, which is located under the batteries / fuse compartment cover. See
chapter 4.1 for instructions how to do it.
3.3. Voltage and resistance measurement
Repeatedly press and release the
U/R/●›
key to select between the following
measurement functions:
3.3.1. Function U
The “U” function is for voltage measurement.
•
Voltage measurement function is selected whenever you turn on the
instrument. (Repeatedly) press and release the
U/R/●›
key, if other function is
selected and you need to measure voltage.
•
Connect test tips to measured voltage. The measured value is displayed. The
symbol "~" is displayed in the case of AC voltage. Polarity symbol is
displayed in the case of DC voltage; if the positive pole is connected to the
test tip on instrument’s case, it is indicated by "+", the negative pole is
indicated by "-" symbol.
•
The
CAL/ELEC
key activates and deactivates the "ELEC" function; if the
function is activated the load resistor approx. 280kΩ is connected to
measured circuit. If this feature is enabled, the display shows "ELEC".
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