S p e c i f i c a t i o n s
Safety and Compliance
Physical Specifications
Specifications
Feature Summary
Electrical Specifications
Accuracy is given as ±([% of reading] + [number of digits]) at 64˚ to 82˚F
with relative humidity up to 80%, for period of one year after
calibration. True RMS responding accuracies are specified from 5% to
100% of range or otherwise specified; Crest Factor < 3:1 at full scale
and < 6:1 at half scale.
NMRR
>60db @ 50/60 Hz
CMRR
> 120db @ DC, 50/60 Hz, Rs = 1k
Ω
(Common Mode Rejection Ratio)
Input Impedance
10 M
Ω
, 30 pF nominal
( 50 M
Ω
, 100 pF nominal for 400
mV ra n g e )
AC Voltage
CMRR
>60db @ DC Hz, Rs = 1k
Ω
(Common Mode Rejection Ratio)
Input Impedance
10 M
Ω
, 30 pF nominal
( 50 M
Ω
, 100 pF nominal for 400
mV ra n g e )
*
1
Accuracy for 400 Hz to 1 kHz
DM391/393-MAN
P. 7
Maximum voltage between any
1000 V AC/DC
terminal and the ground
Compliances
Complies with CSA C22.2 No 1010.1-92,
NASI/ISA-S82, 01-94 to 1000 V
overvoltage category III
Certifications
UL & cUL standard UL 3111-1
listed CE-marking certified
Surge protection
8kV peak per IEC 1010.0-92
Fuse protection fro mA or µA inputs
1000 V/440mA IR 10kA FAST fuse
Fuse protection for A input
1000 V/11A IR 10kA FAST fuse
Display
Digital -4000 counts display;
updates 5 times/sec.
Operating temperature
32˚ to 104˚F (-0˚ to 40˚C)
Storage temperature
-4˚ to 140˚F (-20˚ to 60˚C)
Temperature coefficient
Nominal 0.15 x (specified accuracy)/˚C @
(0˚ to 8˚C or 28˚ to 40˚C),
or otherwise specified
Relative humidity
0% to 80% @ (32˚ to 95˚F)
0% to 70% @ (95˚ to 104˚F)
Altitude
Operating - up to 6,500 feet
Storage - 32,000 feet
Battery type
Single 9V battery - NEDA 1604, JIS
006P ir IEC 6F 22
Battery life
250 hrs. typical (w/backlight off) DM393
250 hrs. typical (w/backlight off) DM391
Shock degree
Per MIL-T-PRE 28800 for Class II
instruments
Pollution degree
2
Electromagnetic compatibility
Susceptibility - commercial limits for
(EMC)
EN 50082-1
Emissions - commercial limits for
EN 50081-1
Size
1.6 x 3.6 x 6.8 inches
Weight
13.6 oz.
Warranty
Five (5) year limited warranty
Calibration interval
One (1) year recommended
Backlight
For clear readings in poorly lit areas
Fast autoranging
Meter automatically selects the best
range momentarily
HOLD
Holds readings on display
Continuity/open test
Beeper sounds
Battery/fuse access door
Battery or fuse replaceable without
voiding calibration
High-impact over-molded case
Protective holster features
Range
Resolution
Accuracy
DM391
DM393
400mV
100µV
4V
1mV
40V
10mV
0.5% + 2
0.5% + 2
400V
100mV
1000V
1V
0.75% + 3
0.75% + 3
Range
Resolution
Accuracy
40 Hz - 400 Hz
400 Hz - 1 kHz
1 kHz - 20 kHz
D M 3 9 1
D M 3 9 3
D M 3 9 3
400mV
100µV
2.0% + 10
2.0% + 10
4V
1mV
40V
10mV
0.75% + 3 0.75% + 3
2.0% + 3
400V
100mV
1000V
1V
1.0% + 5
1.0% + 5
2.0% + 5*
1
-
