Simpson 228 - Burn Hazard Measurement

14
3. Turn Function Select switch to VO LT S.
4. Connect Instrument Ground Test Lead to known good ground (such as a water
pipe or power line ground).
5. With SW1 open, turn ON equipment under test.
6. Use Positive Test Lead to probe all accessible conductive surfaces to determine
if excessive voltage is present. Read the 0-300 volts (bottom) scale.
a. If the voltage measurements appear normal, proceed to Burn Hazard test
which follows.
b. If measured voltage is above expected value, check equipment for short cir-
cuits and make any necessary repairs before continuing. Abnormally high
voltages that persist without corresponding short circuits indicate current
leakage.
7.4 Burn Hazard Measurement
1. Turn Function Select switch to BURN HAZARD (see Figure 6 below).
Figure 6
2. Use Positive Test Lead to probe all accessible conductive surfaces and check
for excessive current leakage. Read the 0-100mA RMS scale.
NOTE: Most safety specifications set a limit of 70mA for this measurement. Refer to
the appropriate specification (or equipment manufacturer) for the correct limit. Pro-
ceed only when burn hazard measurements are within acceptable limits.
OUTPUT
REACT.
LET GO
228
3
10
1
.3
ON
BATT.
OFF
+
WARNING
READ MANUAL BEFORE USE
!
+
SHOCK
HAZARD
LEAKAGE CURRENT TESTER
RESPONSE
(MIU)
BURN
HAZARD
(0-100mA)