Textron GREENLEE DM-860 Manuel D'instructions page 22

Specifications
Display: LCD
Normal Mode: 50,000 counts
High Resolution Mode: 500,000 counts
6 digits (999,999 maximum count) for frequency
42-segment bar graph
Polarity: Automatic
Sampling Rate:
50,000 Counts Mode: 5 per second nominal
500,000 Counts Mode: 1.25 per second nominal
Bar Graph Display: 60 per second
Temperature Coefficient: Nominal 0.1 x (Accuracy) per °C below 18 °C from 0 °C to 18 °C
(32 °F to 64 °F) or above 28 °C from 28 °C to 40 °C (82 to 104 °F) or otherwise specified
Intelligent Automatic Power Off: After 17 minutes of inactivity
Low Battery Indication: Below approximately 7 V
Noise Rejection*:
Normal Mode Rejection Ratio > 60 dB at 50 Hz and 60 Hz when measuring DCV
Common Mode Rejection Ratio > 90 dB from 0 Hz to 60 Hz when measuring ACV
Common Mode Rejection Ratio > 120 dB at 50 Hz and 60 Hz when measuring DCV
Operating Conditions:
0 °C to 30 °C (32 °F to 88 °F), 0% to 80% relative humidity
31 °C to 45 °C (88 °F to 113 °F), relative humidity decreasing linearly from 80% to 50%
(non-condensing)
Elevation: 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
* 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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