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Insulation Testing
1.
Turn the instrument 'On' by selecting the MΩ range.
2.
Connect the test probes to the isolated circuit under test.
3.
Press and hold the push button; the display shows the insulation value.The
reading will remain displayed for a few seconds after the push button is
released. As an additional safety feature, instruments with 1000V range will
flash
symbol before performing a test.
1000V
4.
Release the push button before removing the test leads (to enable the
instrument to discharge the circuit under test).
5.
On completion switch to the 'OFF' position. Alternatively auto shut off
operates after 12 minutes of inactivity.
Test Voltage Accuracy: -0% + 30% (over full operating temperature)
Measuring Range:
Short Cct. Current:
Accuracy (at 20°C):
Output Noise Voltage:
Hum Rejection:
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0,01MΩ
0,1MΩ
0.5MΩ
Terminal Characteristics
Measuring Range:
Open Cct. Voltage:
Accuracy (at 20°C):
Lead res. comp:
Hum Rejection:
Continuity Beeper:
Temperature Coefficient: <0,1% per °C
Temperature Range:
Operating:
Storage:
Humidity:
Display:
Auto Shut off:
instrument in Continuity position and 12 minutes in Insulation position. Beep
notes pre-empt auto shut off. The instrument can be switched back on by
pressing the test button, or by selecting 'OFF' and then the required position.
Default Live Circuit Warning (BM221; BM222; BM223 and BM227)
When more than 25 V is applied to the terminals, the instruments default to a
voltmeter on all switch positions except 'OFF' and
SPECIFICATION
Insulation
into 0 to 1mA load
0,01MΩ - 999MΩ (Digital)
0,1MΩ - ∞ (Analogue)
Less than 2mA
± 3% ±2 digits up to 10MΩ
± 5% ±2 digits up to 100MΩ
± 30% up to 999MΩ
Typically 2V pk to pk at 20kHz (at 1mA load)
<10% error with 100µA RMS (0,2MΩ to ∞ )
1000 V Range
500 V Range
250 V Range
1,0MΩ
10MΩ
100MΩ
Load
Continuity
0,01Ω - 99,9Ω
5V ±1V
0,01Ω - 9,99Ω ±3% ± 2 digits (I
10Ω − 100Ω ± 5% ± 2 digits (I
0 to 9,99Ω
<3% error with 1V RMS (0,2Ω to 50Ω)
On
position, the beeper sounds at <5Ω resistance
Environmental Conditions
-20°C to +40°C (full measurement range)
-20°C to +60°C (to 100 MΩ maximum)
-25°C to +65°C
90% RH at 40°C max
General Specifications
3 digit L.C.D. Maximum reading 999
Operates after 5 minutes of inactivity by the
10MΩ
5MΩ
2MΩ
1MΩ
0,5MΩ
0,2MΩ
0,2MΩ
0,5MΩ 1MΩ 2MΩ
Limiting Value
>200mA)
SC
>20mA)
SC
. In addition, the beeper
5MΩ
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