Metrohm 746 VA Trace Analyzer : Owner manual : Page 436

5.7.3 Alphabetical instruction list

746 VA Trace Analyzer / 747 VA Stand

5-285

SIMPULSE Page: O, S Stand: M, A Abbreviation: SI

Instructions t/s Main parameters Auxiliary parameters

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## .. SIMPULSE .....

Function Simulation of standard additions with the 3.496.8380 VA Simulator.

Description The SIMPULSE instruction is used to put out a total of 100 pulses at the

3.496.8380 VA Simulator which cause an increase in the current

measurement and hence a simulation of standard additions. The VA

Simulator can be reset to the original current level with the SIMRESET

instruction.

Comments • The 3.496.8380 VA Simulator and the associated 3.496.5190

Connecting cable are available as an option. The VA Simulator gen-

erates 2 polarographic current waves with half-wave potentials of ca.

–540 mV and ca. –1070 mV in a defined voltage range. You will find

further details in the 3.496.8380-SB Circuit Description supplied with

the VA Simulator.

• To obtain a larger current increase, the SIMPULSE instruction can also

be entered twice in succession.

Example Test program for 3 simulated standard additions with the 3.496.8380 VA

Simulator:

Method SIMI .mth OPERATION SEQUENCE

Title Test program

================================================================================

Instructions t/s Main parameters Auxiliary parameters

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1 SMPL/M V.fraction mL V.total L

2 SIMRESET 1.0

3 (ADD

4 SEGMENT Segm.name Seg1

5 SIMPULSE

6 ADD>M Soln.name V.add 0.100 mL

7 ADD)3

8 END

Method SIMI SEGMENT

Seg1

================================================================================

Instructions t/s Main parameters Auxiliary parameters

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1 HMDE Drop size 4 Meas.cell normal

2 DPMODE U.ampl 50 mV t.meas 20.0 ms

t.step 0.20 s t.pulse 40.0 ms

3 SWEEP 50.4 U.start -100 mV U.step 6 mV

U.end -1600 mV Sweep rate 30 mV/s

4 END