Fieldpiece SMG5 Operator's Manual

Model SMG5
MEGOHMMETER
HOLD
OPERATOR'S MANUAL
Specifications
Display:
3 1/2 digit liquid crystal display (LCD)
with maximum reading of 1999.
Overrange: (OL) or (-OL) is displayed.
Low battery indication: The " " is
displayed when the battery voltage
drops below the operating level.
Measurement rate: 2.5 times per
second, nominal.
Operating Environment: 0°C to 40°C at
< 70% relative humidity.
Storage Temperature: -20°C to 60°C, 0
to 80% R.H. with battery removed from
meter.
Auto power off: 15 seconds approx.
Standby consume current: <10μA
Battery:
4 pcs 1.5V (AAA size) UM-4 R03.
Battery Life:
4 hours (continuity) typical with alkaline
battery (@20ΜΩ range test 10ΜΩ
resistor).
Description
The SMG5 Megohmmeter is for fast, easy, and
safe testing of insulation resistance. It provides
1000V voltage source, monitors current, and
displays the resistance between the test points.
Maximum current output is <1.5mA. To extend
battery life, it automatically turns itself off in 15
seconds.
Applications
The SMG5 can be used to determine the
condition of insulation from winding to ground in
a motor, compressor, or transformer. Disconnect
the windings and measure the resistance between
the windings and ground through the insulation.
Determine what a "good" reading is by comparing
your reading to values supplied by the
manufacturer of the equipment or from your own
experience. Make sure that all measurements are
compared to readings at the same temperature.
Insulation resistance can vary dramatically with
temperature.
Megohm readings can work best when the
same equipment is measured over time.
Decreasing insulation resistance levels can
forecast failure before catastrophic failure.
Dimensions:
170mm(H) x 44mm(W) x 40mm(D).
Weight: 160g including batteries.
ELECTRICAL
Range: 20ΜΩ,2000ΜΩ.
Resolution: 10KΩ on 20ΜΩ range.
1ΜΩ on 2000ΜΩ range.
Accuracy:
20ΜΩ range: ±(2%rdg + 2dgts)
2000ΜΩ range: <500ΜΩ ±(4%rdg + 2dgts)
>500ΜΩ ±(5%rdg + 2dgts)
Rated voltage: DC-DC converter to
1000VDC
Accuracy temperature: 23°C ± 5°C less
than 70%RH
Temperature Coefficient: 0.1X (specified
accuracy)/°C (<18°C or >28°C)
DANGEROUS SEE EXPLANATION
IN MANUAL
VOLTAGE
DOUBLE INSULATION
AC-ALTERNATING
(Protection ClassII)
CURRENT
DC-DIRECT
GROUND
CURRENT
International Electrical Symbols
WARNING
Do not measure when compressor
motor is in a vacuum.
WARNING
To avoid electrical shock remove test
leads before opening case or battery cover.
Do not operate with battery cover open.
WARNING
Remove power from circuit under test.
WARNING
Do not touch test lead tips, test points,
or terminals when pressing MEAS.
Insulation Resistance
Measurement Terminal
Voltage
Rx(Ω Ω Ω Ω Ω )
For your safety...
1. Connect the E terminal to ground using
the alligator clip (included).
2. Use one hand to conduct test.
3. Make sure to turn meter OFF to avoid
accidentally pressing MEAS and creating a
1000V voltage source. If the switch is ON
and MEAS is depressed, 1000V will appear
on the terminals.