TESTO 340 User Manual

C.1.2 Keypad
Key Functions
Switch measuring instrument on/off
Function key (orange, 3x), relevant function is shown on the display
Scroll up, increase value
Scroll down, reduce value
Back, cancel function
Open Main menu: press briefly (changed settigs are stored, measurement values are carried over into the menu
Flue gas); open Measurements menu: press and hold down for 2s (changed settigs are stored, measurement
values are carried over into the menu Flue gas)
Open Inst’ diagnosis menu
Change display light: display light stays on permanently or display light is switched on for 10s every time the key
is pressed.
C.1.3 Display
Depending on the menu that is active, the display shows a variety of elements.
Header (active in all views)
 Warning symbol (only if there is a device error;
device errors are displayed in the
Inst’ diagnosis menu).
 Active folder and location.
 Power supply symbol:
Symbol Characteristic Symbol Characteristic
Mains operation Rech. battery operation, capacity: 26-50%
Rech. battery operation, capacity: 76-100% Rech. battery operation, capacity: 6-25%
Rech. battery operation, capacity: 51-75% Rech. battery operation, capacity: 0-5%
Function select view
 Active menu, activated fuel
 Function selection field:
The selected function has a grey background.
Unavailable functions are written in grey type
 Scroll bar
 Function keys for entering commands
C. Product description
11
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TESTO 340 Specifications

General

CO measurement range	0 to 10, 000 ppm
NO measurement range	0 to 3, 000 ppm
NO2 measurement range	0 to 500 ppm
SO2 measurement range	0 to 5, 000 ppm
Resolution CO	1 ppm
Resolution NO	1 ppm
Resolution SO2	1 ppm
Resolution H2	1 ppm
Resolution Differential Pressure	0.01 hPa
Resolution Flow Velocity	0.1 m/s
Resolution Temperature	0.1 °C
Power Supply	Rechargeable battery
Protection Class	IP40
Measurement Parameters	O2, CO, NO, NO2, SO2, CO2, CxHy, Temperature, Draft, Pressure
O2 measurement range	0 to 25%
Temperature measurement range	-20 to 1, 200 °C
Resolution CO2	0.1%
Accuracy CO	±5 ppm or ±5% of reading
Accuracy NO	±5 ppm or ±5% of reading
Accuracy NO2	±5 ppm or ±5% of reading
Accuracy SO2	±5 ppm or ±5% of reading
Accuracy O2	±0.2%
Accuracy CO2	±0.5%
Accuracy H2	±5 ppm
Accuracy Differential Pressure	±0.03 hPa
Accuracy Temperature	±0.5 °C
Display	LCD
Operating Temperature	-5 to +45 °C
Storage Temperature	-20 to +50 °C