3M 2220M manual Specifications, Receiver, Transmitter

Specifications

Receiver

Locating Modes	Special (Single) Peak, Dual Peak w/Direction, Depth & Current
Gain Adjustment	Automatic with Manual override
Frequencies
Active	8 kHz, 82 kHz
Passive Power	50 Hz or 60 Hz
Passive LF	VLF 15 k – 30 kHz
Passive CATV	31.5 kHz *
Cathodic Protection	100 Hz or 120 Hz
Auxiliary/Sonde (Receive only)	512 Hz, 640 Hz, 33 kHz
Display Resolution	0.1 dB
Depth Display Range	0–30 ft (9 m)
Depth Units	cm, inch & ft-in
	± 2% ± 3 in (5 cm) 0–60 in (1.5 m)
Depth Accuracy **	± 6% ± 3 in (5 cm) 61–120 in (1.5 m–3 m)
	± 10% ± 3 in (5 cm) 121–180 in (3–4.5 m)
Cable Current Display	0.01 mA resolution
	Units: mA
Battery type	8 AA size, Alkaline
Typical Battery Life	30 hrs
Display	Large Graphic high contrast LCD w/ backlight
Speaker	0.25 W
Headphone Jack	Standard Mini Jack
Serial Port	Standard RS232 serial w/DB9 connector

*American NTSC, television set on

**Locators are tested in model field conditions with no adjacent signals. Actual operating conditions may result in decreased depth accuracy due to outside signal disruptions.

Transmitter

Output Frequencies Trace Mode Induction mode

Output voltage (max) Trace

Output Power

Output Protection Battery type

Typical Battery Life

8 kHz, 82 kHz

82 kHz

60 Vrms

Normal setting: 0.5 W

High setting: 3 W @ 8 kHz, 1 W @ 82 kHz 240 Vrms

6 C size, Alkaline (LR14)

Normal output level: 45 hrs

High output level: 7 hrs

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