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10

AUTORANGING/MANUAL RANGE SELECTION 

When the meter is first turned on, it automatically goes into Autoranging. This automatically 

selects the best range for the measurements being made and is generally the best mode 
for most measurements. For measurement situations requiring that a range be manually 
selected, perform the following: 

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 return to Autoranging, press and hold the

 RANGE

 

key for 2 seconds. 

Note:

 Manual ranging does not apply for the Capacitance and Frequency functions. 

MAX/MIN 
 Note:

 When using the MAX/MIN function in Autoranging mode, the meter will “lock” into the 

range that is displayed on the LCD when MAX/MIN is activated. If a MAX/Min reading 
exceeds that range, an “OL” will be displayed. Select the desired range BEFORE 
entering MAX/MIN mode. 

1. Press the 

MAX/MIN

 key to activate the MAX/MIN recording mode. The display icon "

MAX

will appear. The meter will display and hold the maximum reading and will update only 
when a new “max” occurs. 

2. Press the 

MAX/MIN

 key again and the display icon "

MIN

" will appear. The meter will display 

and hold the minimum reading and will update only when a new “min” occurs. 

3. To exit MAX/MIN mode press and hold the 

MAX/MIN

 key for 2 seconds. 

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. 

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. 

Note:

 The Relative function does not operate in the Frequency function. 

DISPLAY BACKLIGHT 

Press the 

HOLD

 key for >1 second to turn on or off the display backlight function.  

HOLD 

The hold function freezes the reading in the display. Press the 

HOLD

 key momentarily to 

activate or to exit the 

HOLD

 function. 

AUTO POWER OFF 

The auto off feature will turn the meter off after 30 minutes. To disable the auto power off 

feature, hold down the 

MODE

 button and turn the meter on. 

LOW BATTERY INDICATION 

The

 icon will appear in the lower left conner of the display when the battery voltage 

becomes low. Replace the battery when this appears. 

Содержание DT-985

Страница 1: ...DT 985 TRMS MULTIMETER ...

Страница 2: ... ranges that may in normal use be subjected to particularly hazardous voltages For maximum safety the meter and its test leads should not be handled when these terminals are energized This symbol indicates that a device is protected throughout by double insulation or reinforced insulation PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY I is eq...

Страница 3: ... EXTREME CAUTION when working with high voltages 3 DO NOT measure voltage if the voltage on the COM input jack exceeds 1000V above earth ground 4 NEVER connect the meter leads across a voltage source while the function switch is in the current resistance or diode mode Doing so can damage the meter 5 ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistanc...

Страница 4: ... MIN button 3 RANGE button 4 Mode button 5 Function switch 6 mA µA and 10A input jacks 7 COM input jack 8 Positive input jack 9 HOLD and Backlight button 10 Hz and button 11 RELATIVE button 12 Battery Cover Note Tilt stand and battery compartment are on rear of unit ...

Страница 5: ...cro 10 6 amps cap m milli 10 3 volts amps A Amps k kilo 103 ohms F Farads capacitance M mega 106 ohms Ohms Hz Hertz frequency V Volts Percent duty ratio REL Relative AC Alternating current AUTO Autoranging DC Direct current HOLD Display hold ºF Degrees Fahrenheit ºC Degrees Centigrade MAX Maximum MIN Minimum ...

Страница 6: ... AC VOLTAGE FREQUENCY DUTY CYCLE MEASUREMENTS WARNING Risk of Electrocution The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets As a result the reading may show 0 volts when the outlet actually has voltage on it Make sure the probe tips are touching the metal contacts inside the outlet before ...

Страница 7: ... FREQUENCY DUTY CYCLE MEASUREMENTS CAUTION Do not make 10A current measurements for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert the black test lead banana plug into the negative COM jack 2 For current measurements up to 6000µA AC set the function switch to the yellow µA position and insert the red test lead banana plug into the µA mA jac...

Страница 8: ... circuits or wires that have voltage on them 1 Set the function switch to the green Ω CAP position 2 Insert the black lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive jack 3 Press the MODE button to indicate and Ω on the display 4 Touch the test probe tips to the circuit or wire you wish to check 5 If the resistance is less than approximately 50 th...

Страница 9: ... the batteries and unplug the line cords 1 Set the rotary function switch to the green Ω CAP position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack 3 Press the MODE button to indicate nF on the display 4 Touch the test leads to the capacitor to be tested 5 The test may take up to 3 minutes or more for large capacit...

Страница 10: ...he meter will display and hold the minimum reading and will update only when a new min occurs 3 To exit MAX MIN mode press and hold the MAX MIN key for 2 seconds 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...

Страница 11: ...TALLATION WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the battery cover 1 Turn power off and disconnect the test leads from the meter 2 Open the rear battery cover by removing the screw 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 t...

Страница 12: ...rom 5 of range to 100 of range DC Current 600 A 0 1 A 1 0 reading 3 digits 6000 A 1 A 60mA 0 01mA 600mA 0 1mA 6A 0 001A 1 5 reading 3 digits 10A 0 01A 10A 30 sec max with reduced accuracy AC Current 45Hz to 60Hz 600 A 0 1 A 1 5 reading 3 digits 6000 A 1 A 60mA 0 01mA 600mA 0 1mA 6A 0 001A 2 0 reading 5 digits 10A 0 01A 10A 30 sec max with reduced accuracy All AC voltage ranges are specified from 5...

Страница 13: ... 99Hz 0 01Hz 999 9Hz 0 1Hz 9 999kHz 0 001kHz 99 99kHz 0 01kHz 999 9kHz 0 1kHz 9 999MHz 0 001MHz 10MHz 0 01MHz Frequency electrical 10 00 10KHz 0 01Hz 1 2 reading Sensitivity 15Vrms Duty Cycle 0 1 to 99 9 0 1 1 2 reading 2 digits Pulse width 100µs 100ms Frequency 5Hz to 10kHz Temp type K 4 to 1400 F 1 F 3 0 reading 5 C 9 F digits probe accuracy not included 20 to 760 C 1 C Note Accuracy specificati...

Страница 14: ... times per second nominal Low Battery Indication is displayed if battery voltage drops below operating voltage Battery 1 5VAAA 4 battery Fuses mA µA ranges 0 8A 1000V ceramic fast blow A range 10A 1000V ceramic fast blow Operating Temperature 41 F to 104 F 5 C to 40 C Storage Temperature 4 F to 140 F 20 C to 60 C Operating Humidity Max 80 up to 87 F 31 C decreasing linearly to 50 at 104 F 40 C Sto...

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