Metrohm 791 VA Detector - Manual (Page 8)

1 Introduction
791 VA Detector
2
1.2 Parts and controls
1 3
11 8 9
VA Detector 791 Metrohm
4
nA x50
+
x5 damp
5
1
10
50
1
5
0,1
0,5
overload meas
100
10
0,5
0,1
10 mV
Upol Icomp
. I 0.01 0.02 nA
Icomp
(U = 1 V) out
A µ
I
~
0 1 5 +
2 4 5 6 7
10
Fig. 1: Front of the 791 VA Detector
1 Mains pilot lamp
Lit up when instrument switched
on
7 Commutator
Changing the polarity of I
comp
2 Overload display 8 Adjusting knob
Setting the current measuring sensi-
tivity
3 Commutator
Changeover Stand-by/Measure
9 Potentiometer
Setting the absolute compensation
current I
comp
4 Commutator
Switching on/off damping
10 Potentiometer
Setting the relative compensation
current I
comp
5 Commutator
Switching on/off multiplication of
I
comp
by a factor of 5
11 Digital switch
Setting the polarization voltage
6 Commutator
Switching on/off multiplication of
I
comp
by a factor of 50