3 lamps, Lamps – Metrohm 887 Professional UV/VIS Detector User Manual
Page 46
8.3 Lamps
■■■■■■■■■■■■■■■■■■■■■■
38
■■■■■■■■
887 Professional UV/VIS Detector
Analog output
Voltage range
–1.0…+1.0 V
Resolution
30 µV
Noise
< 30 µV
Output impe-
dance
50
Ω (continuous short circuit fixed)
Offset error
± 1.5 mV
Plug
1 DSUB plug 9-pin (female)
1
2
3
4
5
6
7
8
9
0V
0V
0V
0V
0V
A4 (CH4) A3 (CH3) A2 (CH2) A1 (CH1)
Control input
Input voltage
range
0…5 V (5 V-Logical- or switching contact control possible.)
Impedance
22 k
Ω (permanent resistance up to 50 V. Secured against ESD.)
Function
Start, Zero, 2x Reserve
Caution: If input "reserve 2" is active at the time the instrument is
switched on, the instrument enters long-term test mode, which
switches through all elements following a time schedule and cannot be
terminated, not even by power failure. Can only be operated by service
software or RS-232 commands.
8.3
Lamps
UV lamp
Type
D2 (Deuterium)
Power con-
sumption
approx. 20…30 W
Lifetime
ca. 1000 h
VIS lamp
Type
Halogen
Power con-
sumption
approx. 5 W
Lifetime
approx. 10000 h