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Getting Started
Model 300E Carbon Monoxide Analyzer
Instruction Manual
26
P/N 04288 REV: A
CONTROL IN
A B C D E F U
+
S
P
A
N
Z
E
R
O
CONTROL IN
A B C D E F U +
-
+
5 VDC Power
Supply
S
P
A
N
Z
E
R
O
Local Power Connections
External Power Connections
Input #
Status
Definition
On Condition
A
REMOTE ZERO
CAL
The Analyzer is placed in Zero Calibration mode. The mode
field of the display will read
ZERO CAL R.
B
REMOTE
SPAN CAL
The Analyzer is placed in Span Calibration mode. The mode
field of the display will read
SPAN CAL R.
C SPARE
D SPARE
E SPARE
F SPARE
Digital Ground
May be connected to the ground of the datalogger/recorder.
U
Pullup supply
for inputs
Input pin for +5 VDC required to activate pins A – F. This
can be from an external source or from the “+” pin of the
instruments STATUS connector.
+
In5V
Supply
Internal source of +5V which can be used to actuate control
inputs when jumpered to the U pin.
5.
If you wish to utilize either of the analyzer’s two serial interfaces, refer to
Section 6.8 of this manual for instructions on their configuration and usage.