TM-507 Insulation Tester
Display:
- 4 digits LCD display.
- Polarity indication: Automatic polarity display for negative input.
- Low battery indication.
Functions:
- Function keys: POWER, GO, ZERO, LOCK, BACKLIT.
- Continuity test.
- Measures high insulation resistance with auto range:
250V: 4M ~ 1000M Ohm
500V: 4M ~ 2000M Ohm
1000V: 4M ~ 4000M Ohm
- Measures DC voltage (0V~600V), AC Voltage (0V~600V).
- Auto power off.
- Auto discharge.
Autorange:
-Open circuit voltage: <1.3 x V0
-Accuracy of nominal voltage: ¡ V0% +10%
-Short circuit current: <3.0mA
-Nominal testing current: 1mA @ 1K Ohm x V (1mA @ 500K Ohm)
YF-509 Insulation Tester
Display:
- 3 1/2 digits LCD display with max. Reading of 2000.
- Overload indication.
- Low battery indication.
Functions:
- Function keys: Data hold, Max.
- Equipped with a continuity test.
- Measures high insulation resistance with manual range
250V: 0.1M ~200M Ohm
500V: 0.1M ~200M Ohm
1000V: 1M ~ 2000MOhm
- Measures DC voltage (0V~1000V), AC Voltage (0V~750V).
Dimension:
- Size: 160*100*52mm(LxWxH).
- Weight: About 480g (including battery)
TM-508A Milliohm Meter /Battery or AC/DC Adaptor Powered
Display:
- 3 1/2 digits LCD display with max. Reading of 2000.
- Low battery indication.
Functions:
- Zero adjustment: External zero adjust knob.
- Very low impedance measurement by four wire type one pair coated clip.
- Wide measurement range, 0.1m to 20K Ohm in 6 positions.
- Function keys: D-H switch lockup readings for LCD display.
- Fuse specification: 2A/250V, 5ø X 20mm, fast Min. Interrupt ratings 1500A.
Dimension:
-Size: 160x 100x 52mm(LxWxH).
-Weight: About 700g.
Audited Supplier 
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