Elma BM 251s-257s
side 46
Battery and Fuse replacement:
Loosen the screw from the access cover of the case bottom. Lift the access cover.
Replace the batteries or fuse. Re-fasten the screw.
Generel specifications
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:
BM251s: Average sensing
BM257s: True RMS sensing
Pollution Degree:
2
Safety:
Double insulation per IEC/UL/EN61010-1 Ed. 3.0, IEC/EN61010-2-030 Ed. 1.0,
IEC/EN61010-2-033 Ed. 1.0, IEC/UL/EN61010-031 Ed. 1.1 and CAN/CSA-C22.2 No.
61010-1-12 Ed. 3.0 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 / mA
A / A: Category II 1000V, CAT III 600V and CAT IV 300V AC & DC.
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)
