Timer:
BM11D
:
0 to 60
minutes
BM21
:
0 to 90
minutes: User selects test duration
Hum Rejection:
1 mA rms per kV test
voltage
2 mA rms maximum
Voltage range:
BM11D
: 50 to 1000
V a.c. or d.c.
BM21
: 50
to1000
V a.c. or d.c.
(N.B. Display does
not distinguish between V a.c. and V d.c.)
Accuracy (0 °C to +30 °C):
±2% ±1 V
Guard Terminal:
Will guard out
parallel resistances to a minimum of 250 k
Ω
.
When measuring
100 M
Ω
under these conditions, the additional error will be less
than 5%.
Capacitor charging time:
5s per µF to charge
to 5 kV
Capacitor discharging time:
2s per µF to
discharge to <50 V
Maximum continuous overload:
1 kV rms
Temperature coefficient:
0,2% per °C (test
current >100 nA)
0,1% per °C for test
voltage
Temperature range:
Operating: -20 °C to
+50 °C (Errors double outside range 0 to 30 °C)
Storage: -25 °C to
+65 °C
Power supply:
Two 12 V, 2 Ah
Lead-acid rechargeable batteries. Recharge time: 16 hours
Battery life: typically
8 hours continuous testing
Environmental protection:
IP54 (with the
charging recess cover securely closed)
Altitude:
2000 m max. to
operate within specification
Fuses:
FS1: 100 mA (T),
250 V IEC 127/1
FS2: 100 mA (F),
250 V IEC 127/1
Mains Power cord
fused plug (when applicable): 3 A fuse to BS 1362
Safety:
The instruments
meet the
requirements for
double insulation to
IEC 1010-1 (1995)
EN 61010-1 (1995)
to installation
Category
III*
, 300
Volts phase to earth
(ground) and 500
Volts phase to phase
E.M.C:
The instruments
meet EN 50081-1
and EN 50082-1
(1992)
Dimensions:
344 mm x 245 mm x
158 mm
18
