RS PRO 204-8305, Instruction Manual

7

8

REL   button 

The RELATIVE function zeros out the reading on the display and stores it as a reference. 
Subsequent readings will be displayed as the relative difference between the actual 
measurement and the stored reference value.  
1. Momentarily press the 

REL

 button. The “ ” indicator will appear on the LCD display 

along with the relative reading. Momentarily press the REL button again to return to normal 
operation.
2.press and hold the 

REL

 button until the “

LOG

” indicator reappears can Manual or automatic 

storage of data.
3. press and hold the 

REL

 button until the “

VIEW

” indicator reappears can manually view the 

stored data
4.In the LOG mode, Momentarily press the 

REL

 button can manually record a data.

NOTE

: The meter does not Autorange when the Relative mode is active. The display 

will read OL if the difference exceeds the range. When this occurs, exit REL and use the 
RANGE button to select a higher range. REL does not work on Frequency, Duty Cycle, or 
Temperature. 

NOTE

: AC + DC can only be accessed when the meter is set to AC or DC voltage. 

The AC + DC function measures both the AC and DC components to derive the effective 
RMS (AC + DC) value. The AC + DC mode is typically used when measuring voltage on 
unfiltered rectifier circuits. To activate, press and hold the MODE button until “AC + DC” 
appears on the LCD display. 

MAX/MIN/AVG Button

1. Momentarily press the 

MAX/MIN

 button to activate the MAX/MIN/Average mode. “

MAX

” 

will appear on the LCD display and the meter will display and hold the highest reading. The 
meter will update the reading when a higher “max” occurs.
2. Momentarily press the 

MAX/MIN

 button again to view the lowest reading. “

MIN

” will 

appear on the LCD display and the meter will display and hold the lowest reading. The meter 
will update the reading when a lower “min” occurs. 
3. Momentarily press the 

MAX/MIN

 button once more to view the average reading. “

AVG

” 

will appear on the LCD display and the meter will display the running average. The meter will 
update the reading when the average value changes. 

Professional True RMS Digital Multimeter/ English

4. Press and hold the 

MAX/MIN

 button to end MAX/MIN/Average and return to normal 

operation. 
5. In the LOG mode, Momentarily press 

MAX/MI

N button can Automatically record data.

NOTE

: The meter does not Autorange when the MAX/MIN/AVG mode is active. The 

display will read OL if the range is exceeded. When this occurs, exit MAX/MIN/AVG 
and use the RANGE button to select a higher range. MAX/MIN/AVG does not work on 
Frequency, Duty Cycle or Temperature.

HOLD/Delete Button

To freeze the reading on the LCD display, momentarily press the 

HOLD

 button. The “

HOLD

” 

indicator will be displayed while the reading is being held. Momentarily press the 

HOLD

button again to exit HOLD and return to normal operation.
In the VIEW mode , momentarily press the 

HOLD

 button to delete all the data that has been 

recorded.

Backlight 

Button

To turn the backlight on, press and hold the 

Backlight

button until the backlight turns on. 

To turn the backlight off, press and hold the 

Backlight

button until the backlight turns off. 

HZ%/+  Button

Press the 

Hz%/+

 key to select frequency measurement and duty cycle test in positions 

V 

Hz%, 10AHz%, mA

 (AC), 

µA

 and 

Hz%

 of the rotary selector. The frequency range is 

different in the different positions.
In the LOG mode, press the 

HZ%/+

 button, the time interval of the automatic storage record 

is increased.
In time and date settings, press the 

HZ%/+

 button, the number of flickering will be increased.

AC/DC Voltage Measurements

WARNING

: Observe all safety precautions when working on live voltages.

1. Set the rotatory function switch to the 

V Hz%

position.

2. Insert the black test lead into the 

COM

  input  jack  and  the  red  test  lead  into                                                               

the V input jack. 
3. Touch the test lead probes to the circuit under test. 
4. Read the voltage on the LCD display,
5. press the 

MODE

 button to select DC ,AC or low pass filter voltage.

6.  In Low Pass Filter MODE the meter goes to manual mode.

Professional True RMS Digital Multimeter/ English