Gilson VERITY 1741, Руководство пользователя

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45 FRonT PAnEl conTRol | USER’S GUIDE
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Neg. Range
The negative dynamic range setting influences the range of absorbance measuring. This is a
theoretical value. The range varies depending on lighting conditions when the signal is reset
(autozero), and the range is different for each wavelength. In practice, it is necessary to reset
the signal (autozero) on the non-absorbing liquid at a given wavelength to reach the maximum
negative range.
Setting of Negative Dynamic Range
Setting Description
NORMAL −0.1 AU (default value)
MEDIUM -0.3 AU
HIGHER −0.7 AU
IO Config
The VERITY 1741 Detector has an interface for connection to external devices. The interface has
two universal inputs (DIn1 and DIn2) and two universal outputs (DoUT1 and DoUT2).
Interface
INTERFACE SPECIFICATION
PIN ABBR. NAME DESCRIPTION
1 +5V - Auxiliary 5V DC, maximum output current 50mA.
2 DIN1 DIGITAL INPUT 1 Digital input 1. Compatible with TTL, HC, HCT. Overvoltage
category up to 24 V. Opened at level H. Active at level L.
3 DIN2 DIGITAL INPUT 2 Digital input 2. Compatible with TTL, HC, HCT. Overvoltage
category up to 24 V. Opened at level H. Active at level L.
4 DOUT1 DIGITAL OUTPUT 1 Digital output 1. Compatible with TTL, HC, HCT. Maximum
output current 24mA. Output resistance 75ohm.
5 DOUT2 DIGITAL OUTPUT 2 Digital output 2. Compatible with TTL, HC, HCT. Maximum
output current 24mA. Output resistance 75ohm.
6 GND GROUND Ground. Internally connected with chassis.
For external input/output interface, connector blocks are used (included in accessories).
To connect a cable to the connector block, loosen the nut using a small flat-tip screwdriver.
Remove approximately 3 to 4 mm of isolation from the connected cable. Insert the skinned part
of cable into the place under the nut and tighten the nut. Gently pull on the cable to ensure the
conductor holds in the block. If the conductor is too thin, it is better to remove isolation from a
longer section and bend the skinned part before inserting in the block.