Heidolph RZR 2102 control Z - Manual (Page 21)

21
E
Change speed range, RZR 2102 control and RZR 2102 control Z
Select your speed range with the RANGE key (8). LEDs (9) and (10) confirm the range selected. When
switching from range I to II, stirring speed is multiplied by factor five.
How to proceed:

turn stirrer OFF with ON/OFF key (2)

turn speed control (4) to its extreme left position (CCW)
(= low speed)

change speed with key (8)

turn item ON with ON/OFF key (2)

set speed with speed control (4)

speed appears in display (5), line 1
You may change from range II to range I at any time without any extra precautions necessary.
3. Torque display
Both stirrers feature a digital display (5) for stirrin
g torque (line 2). Before measuring, you need to „zero“
your torque display ( = 0,0 Ncm), to benefit of the highest accuracy available from this system (refer to
stipulations below). This is of particular importance, when changing stirrer speed.
How to „zero“ the torque display:

allow the stirrer to warm at max. speed for about 20 minutes.

define speed needed for your particular job

select standby mode with the ON/OFF key (2)

lift stirring tool with stirrer out of the medium, or remove stirring tool from c huck (refer to para. 4 „set-
up“). This way, the motor won’t be able to build up any torque while spinning.

turn item ON with ON/OFF key (2)
 with the motor running, hit the „cal“ key (7), display (5) is going to change to „0,0“ Ncm in line 2

turn the item OFF, re-
install stirring tool in (refer to para. 4 „set-up“), or immerse your system in the
medium again

at this point you have an accurate torque reading
Note:
To avoid splashes (in particular when open containers are
used), speed range cannot be changed unless the item
has been turned OFF before.
2
1
4
5
5
4
8
10
9
2
1
5
4
2
1
7 7 7
RZR 2051 control RZR 2052 control
RZR 2102 control
RZR 2102 control Z