Connecting Analog Output Boards - Thermo Scientific 3110 Operating And Maintenance Manual

Connecting Analog
Output Boards
Thermo Scientific
CAUTION
Contains Parts and Assemblies
Susceptible to Damage by
Electrostatic Discharge (ESD)
The analog output board option allows the incubator to output analog
signals representing the air temperature of the cabinet, the CO2 content ,
the O2 content, and the relative humidity, depending upon which systems
are in the incubator. There are three different analog output board options
available : 0-1V, 0-5V, or 4-20mA signals. Negative display readings will
output 0V. See Table 6-1 for output specifications of the three boards.
Table 6-1. Analog Output Board Specifications
190512 4-20mA
Output Scaling
4-20mA Equals
Temp 00-100°C
RH 0-100%RH
CO2 0.0-100.0%CO@
O2 0.0-100.0%O2
For the 0-1V and 0-5V boards, the recording device must supply a load
>/=1000 ohm. For the 4-20mA board, the recorder must supply a load of
</=100 ohm. The outputs do not have isolated grounds.
To wire in the analog output board, a 22-gauge, 3-conductor shielded
cable (Part # 73041) is recommended, maximum length 50 ft (15.2m).
Warning The electronics drawer contains hazardous voltages. Opening
the drawer and/or wiring in an analog board should be performed by
qualified personnel only. If the unit has been in service, disconnect the
power cord from both the unit and the power source, turn off all gas
regulators, and disconnect all tubing and any other connections from the
rear of the electronics drawer.
190544 0-1V
Output Scaling
0-1V Equals
0.0-100°C
0-100%RH
0-100.0%CO2
0-100.0%O2
s
Water Jacketed CO
Section 6
Factory Installed Options
190543 0-5V
Output Scaling
0-5V Equals
0.0-100°C
0-100%RH
0-100.0%CO@
0-100.0%O2
Incubator 6-3
2