MSA BLTS-1006, Operating Manual

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59 Version 0.1
Operating manual
Intercom helmet type Size measurement, mm
l l
1
l
2
l
3
l
4
l
5
b b
1
b
2
s s
1
TH-4M-S (I) 310 325 238 120 153 160 21 45 200 10 10
TH-4M-S (II) TH-4M-W (I) 323 338 242 120 161 160 21 45 205 10 10
TH-4M-S (III) TH-4M-W (II) 336 351 246 120 169 160 21 45 210 10 10
TH-4M-W (III) 349 364 250 120 182 165 21 45 215 10 10
Note – I, II or III –intercom helmet size.
Intercom helmet with microphone headset
TH-4M-S, TH-4M-W, TH-4M-S-C, TH-4M-W-C, TH-4M-S-AC, TH-4M-W-AC
Description: external communication device.
Features:

freedom to move;

PTT switch type;

may be connected to telephones and сommutator tele-
phones;

CE type cord may be used;

summer and winter types;

cable TH-4S and TH-4W with bare ends;

cable TH-4M-S-C and TH-4M-W-C with plug con-
nector;

cable TH-4M-S-AC, TH-4M-W-AC with angle plug
type connector.
Technical specifications:

operating frequency range: 150…7000 Hz;

word intelligibility at acoustic noise max. 120 dB: at least 92 %;

operating temperature: –40 ℃...+55 °C;

IP rating: IP56;

weight of intercom helmet:
– summer, max. 0.95 kg;
– winter, max. 1.05 kg.