BG 805 981 BE (0201) QMG422.oi
17
DANGER
The external voltage source for V0 must be reliably limited to 2 mA
max
and
isolated for 750 V.
The relay connected to SPEC SRC ON and SPEC SRC RET incl. lines must be
isolated for 750 V and be protected against accidental contact.
Interface to
QMH 400/410, QME 125
Voltage supply
±16 VDC, ± 0.2 V / 10 mA
max
/ ripple 10 mV
max
Output
±10 V / 2 mA
max
Input impedance
100 k
Ω
Input connector
Type TNC
Output connector
D-Sub 9-pin
Temperature
Operation: 0 ... 50°C, Storage: -40 ... +70°C
Weight
150 g
Dimension
18
18
,6
72
50
850
8
20
Measurement
range
Sensitivity
Tolerance
at 25 °C
Rise time
10...90 %
Offset
at 25 °C
±10
-5
A
10
-6
A / V
±1%
50
µ
s
±0.5 mV
±10
-7
A
10
-8
A / V
±1%
90
µ
s
±0.5 mV
±10
-9
A
10
-10
A / V
±2%
1.9 ms
±2 mV
±10
-11
A
10
-12
A / V
±2%
2.6 ms
-50 ... +150 mV
Drift
Offset doubles with each 10°C of temperature increase
Noise
typ. 2×10
-13
A
pp
unfiltered
Input
Installed directly on SEM feed-throughs of the QMA
Pulse width 10 ns
typ
/ pulse height 1...5 mV
Impedance 50
Ω
/ double pulse resolution
≤
20 ns
Protection against arcs in SEM with HV 420/421, QME 125
High voltage
SHV connector HV+ and HV-
HV+: 6.7 kV to GND
HV–: 6 kV to GND
SEM: 3.5 kV between HV+ and HV–
Output
ECL level complementary
Discriminator
threshold
Control voltage LEVEL+ to LEVEL–
0.1 ... 1 V corresponds to pulse height 1 ... 5 mV; common mode ±0.5
V
max
QC connector
Pin 1
QMA-GND
Pin 5
V+ (+12...15V / 0.12 A)
D-Sub 15 male
2
Identification
6
LEVEL–
3
OUT–
7
LEVEL+
4
OUT+
8
V– (-12...15 V / 0.05 A)
9 ... 15
not connected
Weight
0.5 kg
3.7 EP 422
Electrometer
3.8 CP 400
Ion counter preamplifier