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Operating Instructions
Input #
A
B
C
D
E
F
U
+
There are two methods for energizing the Control Inputs. The internal +5V
available from the pin labeled "+" is the most convenient method (see Figure 6-5),
however, to ensure that these inputs are truly isolated a separate, external 5 VDC
power supply should be used (see Figure 6-6).
Figure 6-5: Control Inputs w/ Local 5 VDC Power Supply
114
Table 6-15: Control Input Pin Assignments
Status
Definition
REMOTE ZERO
The Analyzer is placed in Zero Calibration mode. The mode field
CAL
of the display will read ZERO CAL R.
REMOTE
The Analyzer is placed in Lo Span Calibration mode. The mode
LO SPAN CAL
field of the display will read LO CAL R.
REMOTE
The Analyzer is placed in Span Calibration mode. The mode field
SPAN CAL
of the display will read SPAN CAL R.
SPARE
SPARE
SPARE
The ground level from the analyzer's internal DC Power Supplies
Digital Ground
(same as chassis ground).
External Power
Input pin for +5 VDC required to activate pins A – F.
input
The internally generated 5VDC power supply is available on this
5 VDC output
pin. To activate inputs A – F place a jumper between this pin
and the "U" pin.
A
B
C
Z
L
S
E
O
P
R
A
O
S
N
P
A
N
On Condition
CONTROL IN
D
E
F
U
+
Model 400E Ozone Analyzer
Instruction Manual
P/N 04316 Rev: B
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