12
GENERAL SPECIFICATION
Display:
3-5/6 digits 6,000 counts
Update Rate:
5 per second nominal
24 Segments Bar graph:
40 per second max
Operating Temperature:
0
o
C to 40
o
C
Relative Humidity:
Maximum relative humidity 80% for temperature up to 31
o
C decreasing linearly
to 50% relative humidity at 40
o
C
Altitude:
Operating below 2000m
Storage Temperature:
-20
o
C ~ 60
o
C, < 80% R.H. (with battery removed)
Temperature Coefficient:
Nominal 0.15 x (specified accuracy)/
o
C @ (0
o
C ~ 18
o
C or 28
o
C ~ 40
o
C),
or otherwise specified
Sensing:
Model 251, 252 & 255:
Average sensing
Model 257:
True RMS sensing
Pollution Degree:
2
Safety:
Double insulation per IEC61010-1 2nd Ed., EN61010-1 2nd Ed., UL61010-1 2nd Ed. &
CAN/CSA C22.2 No. 61010.1-0.92 to Category II 1000V, CAT III 600V and CAT IV 300V AC & DC
Transient Protection:
6.5kV (1.2/50
s surge)
Terminals (to COM) Measurement Category:
V :
Category II 1000V, CAT III 600V and CAT IV 300V AC & DC.
mA
A :
Category III 500Vac and 300Vdc.
A :
Category III 600Vac and 300Vdc.
E.M.C. :
Meets EN61326-1:2006 (EN55022, EN61000-3-2, EN61000-3-3, EN61000-4-2, EN61000-4-
3, EN61000-4-4, , EN61000-4-5, EN61000-4-6, EN61000-4-8, EN61000-4-11)
In an RF field of 3V/m:
Capacitance function is not specified
Other function ranges:
Total Accuracy = Specified Ac 100 digits
Performance above 3V/m is not specified
Overload Protection:
uA & mA:
0.63A/500Vac, IR
50kA
@500Vac
A:
10A/600Vac IR 100kA @600Vac
V:
1050 Vrms, 1450 Vpeak
AutoCheck
TM
, mV, Ohm & others:
600 Vrms
Low Battery:
Below approx. 2.3V
Power Supply:
1.5V AAA Size battery X 2
Power Consumption (typical):
3.5mA
APO Consumption (typical):
10
A
APO Timing:
Idle for 34 minutes
Dimension:
161*80*50mm L*W*H (With Holster)
Weight:
Approx. 340 gm (With Holster)
Special Features:
AutoCheck
TM
V &
(model 255 & 257 only)
; Auto-ranging MAX/MIN Record
(
model 255 & 257 only
); Crest mode (Peak Hold,
model 255 & 257 only
), Backlighted LCD (
model
255 & 257 only
); Auto-ranging Relative Zero mode; Display Hold; EF-Detection (NCV); Interface
capabilities with PC computer; Input warning detection
