Metrohm 887 Professional UV/VIS Detector - 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