Unpacking / Putting into operation
Definition of control elements
16
17
Unpacking
•
Unpack colony counter carefully.
•
Remove packing material.
•
Remove protective foils from the grid disk (Wolffhügel sectioning) and the
background plate.
•
Read instruction manual.
Putting into operation
•
Check given mains voltage on the type plate.
•
Put background plate with desired background (black or white) into the
instrument.
•
If necessary insert grid disk as a counting aid.
(Wolffhügel sectioning: grid: 1 cm² and 1/9 cm²)
•
Assemble magnifying glass by inserting it into the clamp fastening.
•
The vents at the back panel of the instrument have to be free.
Definition of control elements
Mains switch/
Fuse:
After operating the mains switch the instruments is ready for
working.
Display:
The display digitizes the number of the counted colonies.
Sensitivity:
The operating power for releasing a counting impulse can be
changed with a screw driver (screw at the back panel of the
instrument).
The BZG 30 has been set to a medium sensitivity at the
factory.
Skilled users who want to achieve a high counting frequency set
a high sensitivity, users with a low counting frequency set a lower
sensitivity.
Setting of the high sensitivity: Turn anticlockwise.
Reset key:
Pressing the Reset key sets the display to zero.
Counting disk:
Pressure on the counting disk produces electronic signals which
are evaluated by the electronics and displayed.
Background
plate:
Background can be changed by pulling out and putting in up to
the stop (light/dark).
