Greenlee DM-300 Manuel D'instructions page 22

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Specifications
Display: 6000-count LCD (9999-count in frequency mode)
Polarity: Automatic
Sampling Rate: 5 per second
Temperature Coefficient: Nominal 0.15 x (specified accuracy) per °C
below 18 °C or above 28 °C
Automatic Power-Off: After 30 minutes of inactivity.
To disable this feature, press SELECT while turning the meter on.
Noise Rejection*:
Normal Mode Rejection Ratio > 30 dB at 50 Hz and 60 Hz when
measuring DCV
Common Mode Rejection Ratio > 60 dB from 0 Hz to 60 Hz when
measuring ACV
Common Mode Rejection Ratio > 90 dB at 0 Hz, 50 Hz and 60 Hz when
measuring DCV
Operating Conditions:
–10 °C to 31 °C (14 °F to 88 °F), 0% to 80% relative humidity (non-
condensing)
31 °C to 50 °C (88 °F to 122 °F), relative humidity decreasing linearly
from 80% to 50%
Altitude: 2000 m (6500') maximum
Indoor use only
Storage Conditions: –20 °C to 60 °C (–4 °F to 140 °F)
0% to 80% relative humidity (non-condensing)
Remove battery.
Pollution Degree: 2
Battery: 9-Volt (NEDA 1604, JIS 006P or IEC 6F22)
Overload Protections:
Terminal: 1050 V RMS for voltage functions; 600 VDC/V RMS
for all other functions
A Terminal: 15 A/600 V fuse, interrupting rating 100 kA, 13/32" x 1-1/2"
Measurement Categories:
Terminal: Category III, 1000 Volts ac and dc, and Category IV,
600 Volts ac and dc
A Terminal: Category IV, 600 Volts ac and 500 Volts dc
* Noise rejection is the ability to reject unwanted signals, or noise.
• Normal mode voltages are AC signals that can cause inaccurate DC
measurements. NMRR (Normal Mode Rejection Ratio) is a measure
of the ability to filter out these signals.
• Common mode voltages are signals present at the COM and + input
terminals, with respect to ground, that can cause digit rattle or offset
in voltage measurements. CMRR (Common Mode Rejection Ratio) is
a measure of the ability to filter out these signals.
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