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16

Relative Mode

The relative measurement feature allows you to make measurements  
relative to a stored reference value. A reference voltage, current, etc.  
can be stored and measurements made in comparison to that value.  
The displayed value is the difference between the reference value and the 
measured value. 

 

Note: Relative mode does not operate in the 4-20mA function.

1. Perform the measurement as described in the operating instructions
2. Press the REL button to store the reading in the display and the “REL” 

indicator will appear on the display

3. The display will now indicate the difference between the stored value 

and the measured value

4. Press the REL button to exit the relative mode

Display Backlight

Press the HOLD/

 key for >1 second to turn the backlight on. 

The backlight will automatically turn off after 10 seconds.

Hold

The hold function freezes the reading in the display. Press the HOLD key 
momentarily to activate or to exit the HOLD function.

Peak Hold

The Peak Hold function captures the peak AC or DC voltage or current. 
The meter can capture negative or positive peaks as fast as 1 millisecond 
in duration. Momentarily press the PEAK button, “PEAK” and “MAX” will 
display. The meter will update the dispay each time a higher positive peak 

occurs. Press the PEAK button again, “MIN” will display. The meter will 

update the dispay each time a lower negative peak occurs. Press and 
hold the PEAK button for more than 1 second to exit PEAK Hold mode. 
Auto Power Off feature will be disabled automatically in this mode.

Summary of Contents for ST-9919

Page 1: ...reedinstruments www com Model ST 9919 TRMS Digital Multimeter Instruction Manual...

Page 2: ...Measurement 11 AC Current Measurement 12 Resistance Measurement 13 Continuity Check 13 Diode Test 13 Temperature Measurement 14 Capacitance Measurement 14 Frequency Measurement 14 4 20mA Measurement...

Page 3: ...ous voltages For maximum safety the meter and its test leads should not be handled when these terminals are energized Indicates that a instrument is protected throughout by double insulation or reinfo...

Page 4: ...per IEC 61010 2 USE EXTREME CAUTION when working with high voltages 3 DO NOT measure voltage if the voltage on the COM input jack exceeds 1000V ground 4 NEVER connect the meter leads across a voltage...

Page 5: ...IP67 dust and waterproof EN61010 1 Cat IV 600V Cat III 1000V Includes test leads and 9V battery Specifications Function Range Resolution Accuracy DC Voltage 400mV 0 01mV 0 06 reading 2 digits 4V 0 00...

Page 6: ...0M 0 001M 2 0 reading 10 digits Capacitance 40nF 0 001nF 3 5 reading 40 digits 400nF 0 01nF 4 F 0 0001 F 3 5 reading 10 digits 40 F 0 001 F 400 F 0 01 F 4000 F 0 1 F 5 reading 10 digits 40mF 0 001mF F...

Page 7: ...res peaks 1ms Temperature Sensor Requires type K thermocouple Input Impedance 10M VDC 3M VAC AC Response True RMS AC True RMS The term stands for Root Mean Square which represents the method of calcul...

Page 8: ...holster Size 7 36 x 3 2 x 2 0 187 x 81 x 50mm includes holster Safety This meter is intended for origin of installation use and protected against the users by double insulation per EN61010 1 and IEC6...

Page 9: ...6 amps cap m milli 10 3 volts amps A Amps k kilo 103 ohms F Farads capacitance M mega 106 ohms Ohms PEAK Peak Hold Hz Hertz frequency V Volts Percent duty ratio REL Relative AC Alternating current AUT...

Page 10: ...to the negative COM jack Insert the red test lead banana plug into the positive V jack 3 Touch the black test probe tip to the negative side of the circuit Touch the red test probe tip to the positive...

Page 11: ...nsert the black test lead banana plug into the negative COM jack 2 For current measurements up to 4000 A DC set the function switch to the yellow A position and insert the red test lead banana plug in...

Page 12: ...A mA jack 4 For current measurements up to 20A AC set the function switch to the yellow 10A HZ position and insert the red test lead banana plug into the 10A jack 5 Press the MODE button to indicate A...

Page 13: ...inuity on circuits or wires that have voltage on them 1 Set the function switch to the green CAP position 2 Insert the black lead banana plug into the negative COM jack Insert the red test lead banana...

Page 14: ...shock disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements Remove the batteries and unplug the line cords 1 Set the rotary function switch t...

Page 15: ...ng 1 Press the RANGE key The AUTO display indicator will turn off 2 Press the RANGE key to step through the available ranges until you select the range you want 3 To exit the Manual Ranging mode and r...

Page 16: ...s the REL button to exit the relative mode Display Backlight Press the HOLD key for 1 second to turn the backlight on The backlight will automatically turn off after 10 seconds Hold The hold function...

Page 17: ...r fuse covers WARNING To avoid electric shock do not operate your meter until the battery and fuse covers are in place and fastened securely This MultiMeter is designed to provide years of dependable...

Page 18: ...er by removing two screws B using a Phillips head screwdriver 3 Insert the battery into battery holder observing the correct polarity 4 Put the battery cover back in place Secure with the screws WARNI...

Page 19: ...cover 5 Gently remove the old fuse and install the new fuse into the holder 6 Always use a fuse of the proper size and value 0 5A 1000V fast blow for the 400mA range SIBA 70 172 40 10A 1000V fast blow...

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