Pre-Selection; Pre-Selection Of Speed / Rcf-Value; Pre-Selection Of Running Time - Hermle Z 207 MK User Manual

OPERATION

2.3 Pre-Selection

2.3.1 Pre-Selection of Speed / RCF-Value

Selecting the key, "rpm/rcf" (4), pre-selection is activated. By pressing the key once, the word "rpm"
(M5) flashes. By pressing the key again, the pre-selection of the centrifugal forces can be chosen.
The flashing word, "rcf" (M6), will appear. The desired values can be selected, with the control field
(1). In the display (A-1), the regulated value is shown permanently: before, during and after the run.
For all number marked text, please refer to Figure 17.
Figure 17
As long as the centrifuge lid is open, the speed is adjustable between 200 rpm and the maximum
revolution of the centrifuge.
If the centrifuge lid is closed, the speed can only be pre-selected up to the maximum permissible
revolution of the pre-set rotor. It is the same with the pre-selection of the RCF-Value. The setting
range is between 3 xg and the maximum permissible centrifugal force of the rotor.
See Table 4: "Max. Speed and RCF-Values for Permissible Rotor", (see APPENDIX P. V). All
important values are listed on this table.
ATTENTION:
Please check the maximum permissible revolutions of your test tubes! (Producer
Indication).

2.3.2 Pre-Selection of Running Time

The running time can be pre-selected in 3 different ranges: from 10 seconds up to 99 hours 59
minutes.
1. Range from: 10 seconds up to 59 minutes 50 seconds, in steps of 10 seconds
2. Range from: 1 hour up to 99 hours 59 minutes, in steps of 1 minutes
3. Range: Continuous Run "cont", can be interrupted by the key, "stop" (10).
-The running time can be pre-selected, with the lid opened or closed.
-To activate the setting of the running time, press the key "time" (6).
-In the display, "time" (A-3) flashes the indication: "m : s" or "h : m", depending on the previous
setting.
To set the desired value, use the control field (1). After exceeding 59 min 50 sec, the indication
changes automatically to, "h : m". After exceeding 99 hours 59 min, the word "cont" appears in the
display, "time" (A-3). The continuous run can only be interrupted by pressing the key, "stop" (10).
The time counts down, as soon as the set speed is reached.
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Z207MK_V1.21_eng © Hermle Labortechnik GmbH