TESTO 6740, Instruction Manual

Page: 7 / 28

3. Product description
3.1 System components
7
3. Product description
3.1 System components
To
process
Cooling
coil
1
0554.3304
Measurement
chamber
22
0554.3303
G½, without display
0555.6741
NPT½“, without display
0555.6742
G½, with display
0555.6743
NPT½“, with display
0555.6744
Standard plug, 4 to 20mA
(included with all instruments)
Accessories:
0554.3302 plug (4 to 20mA,
2 switch contacts, 2 LEDs)
1
Only required for process
temperatures > 50°C, cooling coil
only in connection with measurement
chamber
2
Measurement chamber only required
if
- incoming flow is to be increased
(measurement chamber guarantees
a minimum incoming flow of 1l/min
at a positive pressure of 6bar).
- fast assembly/dismantling of
transmitter without interrupting
process is required.
To
PLC/control/
analysis unit
3.2 Operating elements
The instruments with the article numbers 0555.6741
and 0555.6742 do not have any additional operating
elements.
The instruments with the article numbers 0555.6743
and 0555.6744 have a keypad and a display to input
and read off settings (See 5. Menu guide, p. 16).
All of the instruments of Type testo 6740 can be
parameterised with the aid of the 0554.3305 scaling
adapter.

Standard quick-release device

G½ thread
  
Max. pressure: 15bar
abs
Max. pressure: 50bar
abs