Metrohm 944 Professional UV/VIS Detector Vario User Manual
Page 44
8.2 UV/VIS detector
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944 Professional UV/VIS Detector Vario (2.944.0010)
Integration
duration
10 - 247 ms
Duration of
measurement
50 - 2,000 ms
Analog output
Voltage range
–1.0 - +1.0 V
Resolution
30 µV
Noise
< 30 µV
Output impe-
dance
50
Ω (sustained short circuit-proof)
Offset error
±1.5 mV
Plug
9-pin DSUB plug (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 logic 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 "reserve 2" input is active when the instrument is switched
on, the instrument enters long-term test mode, which switches
through all elements following a time schedule and cannot be termina-
ted, not even by power failure. Can only be terminated by service soft-
ware or RS-232 commands.