Lutron Electronics DM-9027T User manual

DIGITAL
MULTIMETER
4 1/2 digits, True RMS
Model : DM-9027T

Caution Symbol
Caution :
* Risk of electric shock !
Caution :
* Do not apply the overload
voltage, current to the input
terminal !
* Remove test leads before open
the battery cover !
* Cleaning - Only use the dry
cloth to clean the plastic case !
Environment Conditions
* Installation categories II .
* Pollution Degree 2.
* Altitude up to 2000 meters.
* Indoor use.
* Relative humidity 80% max.

TABLE OF CONTENTS
1. FEATURES....................................................1
2. SPECIFICATIONS..........................................1
2-1 General Specifications..............................1
2-2 Electrical Specifications............................
.
2
3. FRONT PANEL DESCRIPTION........................
.
5
4. MEASURING PROCEDURE.............................
.
6
4-1 DCV, ACV, DCA, ACA, OHM,
Continuity beeper, Diode, hFE..................6
4-2 Data hold................................................6
5. MEASURING CONSIDERATIONS....................
.
7
6. MAINTENANCE
6-1 Replacement of Battery..........................8
6-2 Replacement of Fuse.............................
.
8
6-3 Cleanin
g
................................................9
7. Optional Accessories.....................................9
7-1 Holster, HS-01.......................................9
7-2 Other optional accessories &
adapters..............................................10
8.THE ADDRESS OF THE AFTER SERVICE
CENTER........................................................12

1. FEATURES
* Design meet IEC 1010 safety requirement.
* 4 1/2 digits DMM, high precision.
* Large LCD display with annunciators.
* LCD display, easy read-out.
* True RMS measuring reading for ACV & ACA function.
* With data hold function
* Compact & strong housing case.
* Optional Holster case.
* Full range optional adapters for Temperature, Light,
DC/AC CLAMP current, Humidity, RPM, Pressure
measurement.
2. SPECIFICATIONS
2-1 General Specifications
Display 15 mm(0.5") LCD, w/ annunciators,
4 1/2 digits Max. reading 19999
Measurement 28 ranges, DCV, ACV, DCA, ACA,
ohms, hFE, DIODE, Continuity
Beeper.
Polarity Automatic Switching,
'-' indicates negative polarity.
Zero Adjustment Automatic adjustment.
Over-input Indicator "1 " mark indication.
Sampling Time Approx. 0.4 second.
Operating Temp. 0 蚓to 50 蚓(32 蚌to 122 蚌).
Operating Humidity Less than 80% RH.
Power Supply 006 P DC 9V battery.
Power Consumption Approx. DC 1.6 mA.
Dimensions 185 x 87 x 39 mm
(6.7 X 3.5 X 1.4 inch)
Weight 320 g/0.71 LB
1

Fuse The meter build in one fuse for
current range(200u/2m/20m/200mA)
protection, its spec. :
Rating - 500 mA
Size - 5 mm dia. x 20 mm
Accessories Red and Black Test Leads ..... 1 pair.
Included Instruction Manual ................. 1 PC.
Optional Please refer page 9, 10, 11.
Accessories
2-2 Electrical Specifications (23 #5 C)
DC Voltage
Range 200 mV / 2 V/ 20 V/ 200 V / 600 V
Resolution 0.01 mV / 0.1 mV /1 mV /10 mV / 0.1 V
Accuracy #(0.1%+2d) -200mV.
3(0.2%+2d) -2V,20V,200V,600V.
Input Impedance 10 M ohm.
Over Load DCV, 350 ACV - 200mV range.
Protection DCV, 600 ACV - others.
AC Voltage (True RMS)
Range 200 mV/2/20/200/600 V
Resolution 0.01 mV/0.1 m/1 m/10 m/0.1 V
Accuracy #(0.8%+10d) -200mV,2V,20V,200V,600V
* spec. are tested under 50/60 Hz.
Input Impedance 10 M ohm.
Over Load DCV, 350 ACV - 200mV range.
Protection DCV, 600 ACV - others.
2

DC Current
Range 200u/2m/20m/200m/10A
Resolution 10n/100n/1u/10u/1mA
Accuracy #(0.5%+5d) -200uA,2mA,20mA
#(0.8%+10d) -200mA
#(2%+5d) -10A
Over Load 200u/2m/20m/200mA range :
Protection 0.5A fuse protection
10 A range :
Max. 10A ( no fuse ).
AC Current(True RMS)
Range 200u/2m/20m/200m/10A
Resolution 10n/100n/1u/10u/1mA
Accuracy #(0.8%+10d) -200uA,2mA,20mA,200mA
#(2%+10d) -10A
* spec. are tested under 50/60 Hz.
Over Load 200u/2m/20m/200mA range :
Protection 0.5A fuse protection
10 A range :
Max. 10A ( no fuse ).
OHMS
Range 200/2k/20k/200k/2M/20M ohm
Resolution 0.01/0.1/1/10/100/1k ohm
Accuracy #(0.5%+5d) -200 ohm
#(0.3%+5d) -2k,20k,200k,2 M ohm
#(0.8%+3d) -20 M ohm.
Over Load DCV, 350 ACV.
Protection
Remark : The above DCV, ACV, DCA, ACA, ohm spec. are tested under the
environment RF Field Stren
g
th less than 3 V/M & frequency less
less than 30 MHz only.
3

Diode Check
Range Approx. forward voltage(VF),
good/defect test.
Resolution 0.1 mV.
Transistor hFE
0-1000 hFE, NPN/PNP.
Data hold
To freeze the display values.
Continuity
Sound beeper for continuity check.
Beeper will sound if the measuring resistance < 250 ohm
approximately.
4

3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Display 3-a Volt/OHM/Diode Input
3-2 Power On/Off Switch 3-b 200 mA Current Input
3-3 Data Hold Switch 3-c 10 A Current Input
3-4 Function Rotary Switch 3-d Transistor hFE Input
3-5 DCV Rotary Switch
3-6 ACV Rotary Switch
3-7 ACA Rotary Switch
3-8 DCA Rotary Switch
3-9 OHM Rotary Switch
3-10 hFE Rotary Switch
3-11 Battery Compartment/Cover
5

4. MEASURING PROCEDURE
4-1 DCV, ACV, DCA, ACA, OHM,
Continuity beeper, Diode, hF
E
When operate the MULTIMETER, first push on
the "POWER SW."(3-2, Fig. 1). Then rotate the
"Range Selector" to the right position. & plug in
the test lead to the right "Input Terminal"
according the following instruction & ref. Fig. 1.
Function Ran
g
e Selector Input Terminal
DCV 3-5 DCV 3-a
ACV 3-6 ACV 3-a
DCA ( < 200 mA) 3-7 DC
A
3-b
DCA ( 200 mA) 3-7 DC
A
3-c
ACA ( < 200 mA) 3-8 AC
A
3-b
ACA ( 200 mA) 3-8 AC
A
3-c
OHM 3-9 ohm 3-a
Continuity beeper 3-9 ohm(beeper) 3-a
Diode 3-9 ohm(Diode) 3-a
hFE 3-10 hFE 3-d
4-2 Data hold
When make any measurement, if select the "Hold Switch"
(3-3, Fig.1) to the "Hold" position will keep the data
on the display. It will release the data hold function if select
the "Hold Switch" to the "Off" position(left side) again.
6

5. MEASURING CONSIDERATIONS
Caution :
* Do not apply the overload
voltage, current to the input
terminal !
(1) Ensure that the battery(006 P DC 9V) is connected to
its snap terminal correctly and placed in the battery
compartment.
(2) Before operating this instrument, familiarize yourself
with all instructions that mentioned in this manual.
(3) Always check to make sure that the function switch is
set to the proper position.
(4) Place the RED Test Lead into the proper input terminal
before making measurements.
(5) Remove either of the test leads from the circuit under
test when changing the measurement range.
(6) Do not exceed the maximum rated signal of each range
to the input terminal.
(7) The "Power On/Off Switch" always to the "OFF" position
when the instrument does not use. Remove the battery if
the instrument is not to be used for a long period of
time.
(8) Be sure to slide the "Data Hold Switch" to the off position
(left side) if the data function is not be executed.
7