Heidolph RZR 2041 - Manual (Page 19)

19
E
2. Turn item ON
Make sure that the voltage of the instrument is the same as the mains supply. The
instrument's voltage is specified on the serial plate underneath the instrument
Make sure that the speed control knob (D) is turned all the way to the left.
Only plug the instrument into a grounded (earthed) electrical outlet. The on/off switch (C) is
used to turn the instrument on and off. The green pilot lamp (A) should light up when the in-
strument is operational.
Always use the mains rotary switch (C) to switch off the mixer. Do not pull out the
plug. The friction ball of the friction gear is disengaged by using the mains rotary
switch (C), which prevents any knocking noises when starting the mixer.
3. Speed setting
Set the desired speed range using the selection switch (B).
The stirrer has two speed ranges:
Range I: 40 - 400 rpm
Range II: 200 - 2000 rpm.
Only change the speed range when the in-
strument is switched off, so as not to dam-
age the gear. It is recommended to turn the
chuck slightly while selecting another speed
range. Only operate the instrument when the
marker is exactly on I or II -(no intermediate
settings).
The selection switch (D) is used to select the desired speed
within range I or II.
The scales are numbered from 1 to 10 and only serve as a guide. The speeds pertaining to the
two ranges are specified separately on the side of the stirrer RZR 2020.
When changing over from speed I to speed II, the stirrer speed increases fivefold.
(from 40 - 400 rpm to 200 - 2000 rpm). As this gives rise to splashing (especially in
conjunction with open containers), the instrument must be switched off before the
operator can switch from speed range I to speed range II.
If the operator attempts to switch from range I to range II or vice versa while the instrument is
in operation
, the motor shuts off and the red pilot lamp (A) lights up.