BG 805 981 BE (0201) QMG422.oi
13
Detector type
Meas. ranges
Modes
Resolution
FARAD,SEM
10
-12
...10
-5
A fsd
FIX
- and
AUTO
-
Range
16 bit * (per range)
EXTERN
GAIN 1: ±10.240V
GAIN 10: ±1.024V
FIX
-Range
16 bit *
ION-CNT
10-2...108 cps,
meaning full use
up to 106...107
cps
AUTO
-Range
in mass-
MODE
:
SAMPLE
: 1/
DWELL
STAIR
: 2u/
SPEED
SCAN
:
STEPS/SPEED
*) Further increased by averaging
Type
Two-stage lowpass, effective for electrometer and external input
Filter time
constant
automatic or selectable in eight steps:
18 , 85 , 400 µs / 1.7, 8, 40, 180, 800 ms
Filter step
response
τ
63
t
s
τ
63
: Filter time constant
Settling time to ±1‰:
t
s
≈
4 ×
τ
63
NORMAL (N)
Low pass (average value)
FIR (F)
Finite Impulse Response
AVERAGE
Average formed across several measurement cycles
400
Also refer to
→
16
Types
Axial, cross beam, grid, sputter process monitor, Spec+, Spec-
Parameter sets
4 per ion source
Potentials
V1 ... V9
125
Also refer to
→
[3]
Types
Axial, cross beam, grid, sputter process monitor
Emission
Standard: 0.07 ... 2 mA; Degas: 0.7 ... 20 mA / 500 V
trip-TYPE: ABS
2 absolute switching functions per channel
trip-TYPE: HYST
1 hysteresis switching function per channel
Reaction time with DO 420A
<
1 ms after measurement is completed
Measurement ranges and
resolution
Analog filter
Digital filter
Ion sources
Switching functions