Metrohm 838 Advanced Sample Processor User Manual

2.7 Manual operation
Metrohm 838 Advanced Sample Processor, Operation 53
2.7.9 External pump control
0
EXT
manual operation
PUMP on/off no. ?
1, 2
Switching the pump connec-
tors
The pump connectors at the rear side of the tower can be switched
with the <EXT> key. Just enter the number of the connector to
switch its state (on/off).
The state of the pump connector is displayed in the normal state of
the instrument:
******** counter 1/112
PUMP-+ STIR----- ready
The + sign stands for an activated pump connector 2.
2.7.10 Switching the injection valve
.
<
VALVE
+
manual operation
VALVE: inject
inject, fill
Switching the injection valve
The injection valve on the tower of the 838 Advanced Sample Proc-
essors has two positions. With the <VALVE> and the <ENTER>
key the position is switched directly.
2.7.11 Rack initialization
>
*
RACK
-
******** counter 1/112
RACK busy
Initialize the sample rack
The <RACK> key immediately rotates the rack to initial position.
The magnetic rack code is read off and the corresponding rack table
is loaded. This should be done after every rack change.

Metrohm 838 Advanced Sample Processor Specifications

General

Weight	Approx. 15 kg
Power Supply	100-240 V, 50/60 Hz
Type	Sample Processor
Compatibility	Metrohm Titrators
Automation	Fully automated
Sample Capacity	Up to 72 samples
Interface	RS-232
Number of sample positions	72
Rinsing	Integrated rinsing station
Dosing	Integrated dosing functions for reagent addition
Applications	Titration, sample preparation
Temperature Control	Optional
Sample Volume	Variable, depending on application