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Installation
Remote Interconnections
2-8
Model 146i Instruction Manual
0
0
1
1
1
1
Pins 28 and 29 select the photometer mode.
Phot Bit 2
Pin 29
0
0
1
1
Pin 11 sets all analog outputs to zero. This can be used to test the analog
output functionality.
Pin 30 sets all analog outputs to full-scale values. This can be used to test the
analog output functionality.
Outputs
The Model 146i is controllable through the 37-pin female rear-panel
connector.
The output relays report the status of the 146i. They default to Normally
Open (meaning that the relays are closed when the condition exists) and can
be user-configured as NO or NC. Refer to the following tables for the
indicated gas, gas span level, and ozonator or permeation oven level for the
Model 146i.
Pins 1, 2, and 3 to report the selected gas (1 indicates contact closure):
Gas Bit 3
Pins 3,22
0
0
0
0
1
1
1
1
1
0
0
0
0
0
1
0
1
Phot Bit 1
Pin 28
0
Photometer Off
1
Photometer Internal
0
Photometer External
1
Photometer Ozonator Control
Gas Bit 2
Gas Bit 1
Pins 2,21
Pins 1,20
0
0
0
1
1
0
1
1
0
0
0
Ozon 5
1
Perm 1
0
Perm 2
1
Perm 3
0
Perm 4
1
Perm 5
Gas Type
Gas Off
Gas A
Gas B
Gas C
Gas D
Thermo Fisher Scientific
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Troubleshooting
