Chapter 2 Installation
NOTE:
All gas must be delivered to the instrument at atmospheric pressure. It may be
necessary to employ an atmospheric bypass plumbing arrangement, as shown in Figure
2-2.
2. Connect the
EXHAUST
bulkhead to a suitable vent. The exhaust line should be 1/4"
OD with a minimum ID of 1/8". The length of the exhaust line should be less than
10 feet. Verify that there is no restriction in this line.
3. If the optional zero/span solenoid valves are installed, connect a source of CO-free
air to the
ZERO
bulkhead.
4. If the optional zero/span solenoid valves are installed, connect a source of CO span
gas to the
SPAN
bulkhead.
5. Connect a suitable recording device to the rear panel terminals. Refer to “Operating
Modes” in Chapter 3 for the pin-out of the rear panel terminals in each operating
mode.
4. Plug the instrument into an outlet of the appropriate voltage and frequency.
CAUTION:
The Model 48C is supplied with a three-wire grounding cord. Under no
circumstances should this grounding system be defeated.
2-2
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