TESTO 454 User Manual

8.6.3.1 Notes on battery operation
- In order to protect the instrument from total discharge when not operating connect it for one
day a month to the mains unit.
- If “Emergency” is displayed, a one-minute refresh cylce takes place which regenerates the
run down rechargeable battery. The red LED lights up in the battery charger. If the cycle has been
successfully completed “Charge quickly” appears in the display. If the refresher impulse was
insufficient the procedure can be repeated by switching the mains unit on and off with the instru-
ment switched off. If the instrument does not go into the fast recharging mode the rechargeable
battery is defect. In order that the complete battery capacity is available the recharging cycle
should be repeated 2 - 3 times following total discharge.
- A recharging cycle takes approx. three hours and is displayed by the instrument by going from
“Quick” to “Conserve”. The compensation charge fills the rechargeable battery completely.
- The charge is active if testo 454 if switched off and the mains unit is connected or if the mains
unit is connected when the instrument is switched off.
- If the mains unit is plugged out during rapid recharging the instrument deactivates itself within one
second. Deactivation can take two minutes in the conservation mode.
- Long-term measurements should be started with a newly charged battery.
- The capacity of the rechargeable battery is correctly displayed in the instrument menu 4 hours
after charging.
- The operating limits of the rechargeable battery are shown with ”LowBat” or ”TempOut”.
8.6.3.2 Examples of the service life of testo 454
The service life depends on the probe assignment and the measuring rate. The following is a list of
typical examples which influence the service life of the rechargeable battery.
8Main menu
8.6 Device
8.6.2 Date/Time
Enter the date in the format DD:MM:YY, the time in
the format hh:mm:ss.
Confirm the entry of the numbers with <Enter>.
8.6.3 Rechargeable battery
The battery charge is shown by the voltage available,
instrument temperature and the capacity of the
rechargeable batteries ( ÷÷÷÷÷ = Battery charged).
25
Device...
Display
∂ate, Time
Rech.bat
Ein
On
Enter /
Device....
Display
Date,Time
®ech.bat
Accu
Volt:8.5V
Tem: 26°
Cap:÷÷÷÷÷
Ein
On
Enter /
Date/Time
“¡.03.94
11:18:06
2
2
Ein
On
Enter /
Date/Time
22.≠¶.94
11:18:06
2
2
Ein
On
Enter /
Connection Warm up time Meas. rate Service life
approx.
1 x thermal anemometer (70 mA) 20 s 30 min 5.0 days
6 x thermocouple None 30 min 15 days
1 x thermal anemometer (70 mA) 20 s 10 min 2.7 days
1 x digital humidity (10 mA) 2 s 10 min 9.0 days

TESTO 454 Specifications

General

Brand	TESTO
Model	454
Category	Data Loggers
Language	English