Hach-Lange REFO 3_REFO 3D - Manual (Page 8)

Operating Instructions REFO 3 / REFO 3-D
7
Battery
Compartment
mains / charging
socket
Figure 3: REFO rear view
B2.2 Exchanging the batteries
Note: When exchanging the batteries, all stored measurings will be lost if the cover
of the battery compartment is lifted-off while the instrument is on. Therefore
wait for the automatical shut-down before exchanging the batteries.
To exchange the batteries:
•
Lift-off the cover of the battery compartment (see fig. 3)
•
Take-off all batteries
•
Put fresh batteries into the compartment as shown in the sketch
•
Snap the cover onto the battery compartment again.
•
B2.3 Entering standard number and calibration values
Standard number and calibration values need only be entered again if the standard is
changed. The 4-digit standard number and calibration values for 20°, 60° and 85°
are indicated on the rear of the standard they apply to.
1. Put REFO on the standard (remove cloth!)
2. Turn on REFO with key Meas/ON
3. Select program P3 with the program key