TESTO 645 Instruction Manual page 9

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Connect probe
corresponding to
connection assignment
(rear of instrument)
1.
Current measurement
5.
Memory
settings
MAN
Activate
manual
saving
AUTO
Program
automatic
saving
• Select meas.
cycles
• Set
measurement
rate
OUT
Read memory
contents on
display with
printing option
CLEAR
Clear memory
Note: Everything
in the memory is
deleted
www.
Overview of controls
Simultaneously
Instrument configuration
Activate - deactivate
automatic switch-off function
Select power supply
battery/rechargeable battery
Setting: Date
Setting: Time
Parameter setting for absolute
pressure and density compensation
°C, %,
rho-g/m
Print parameters
Unit selection
°C°F
m/sfpm [ft/min] (testo 445)
m /h
3
l/s cfm [ft
hPa
in W ["H
Factory reset
Note:
Flashing display is activated and is
confirmed by pressing
9
Testo-Direct
6.
Abs.mbar,
, Pitot tube factor
3
m /min m /s
3 3
/min](testo 445)
3
mbar psi
O] (testo 445)
2
.
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