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Model 400E Ozone Analyzer
Instruction Manual
The pin assignments for the Status Outputs are:
Rear Panel
Label
1
2
3
4
5
6
7
8
D
+
6.8.2. Control Inputs
Several Control Inputs that allow the user to remotely initiate ZERO and SPAN
Calibration Modes are provided via an 10-pin connector labeled CONTROL IN on the
analyzer's rear panel. These are opto -isolated digital inputs that are activated when
a 5 VDC signal is applied to the "U" pin.
P/N 04316 Rev: B
Table 6-14: Status Output Pin Assignments
Status
Definition
SYSTEM OK
On if no faults are present.
On if O3 concentration measurement is valid.
CONC VALID
If the O3 concentration measurement is invalid, this bit is OFF.
HIGH RANGE
On if unit is in high range of DUAL or AUTO Range Modes
ZERO CAL
On whenever the instruments ZERO point is being calibrated.
SPAN CAL
On whenever the instruments SPAN point is being calibrate d.
DIAG MODE
On whenever the instrument is in DIAGNOSTIC mode.
SPARE
SPARE
EMITTER BUSS
The emitters of the transistors on pins 1-8 are bussed together.
SPARE
DC POWER
+ 5 VDC
The ground level from the analyzer's internal DC Power
Digital Ground
Supplies.
Operating Instructions
Condition
113
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