Teledyne Insta Trans - trace and percent oxygen transmitter - Manual (Page 23)

Trace Oxygen Transmitter Installation
Teledyne Analytical Instruments 15
If greater flow is required for improved response time (over 20
SCFH), install a bypass in the sampling system upstream of the analyzer
input.
EXHAUST OUT: Exhaust connections must be consistent with the
hazard level of the constituent gases. Check local, state, and federal
laws, and ensure that the exhaust stream vents to an appropriately
controlled area if required. The exhaust should be vented to atmospheric
pressure, through a short length of tubing (3'). The vent tubing should
not be less than 1/8".
3.4 Electrical Connections
The Insta-Trans analyzer requires two electrical connections. A
chassis ground connection should be made to the left side of the
mounting bracket. This is required to reduce the sensitivity to radio
frequency interference (RFI). An adequate ground connection is can be
established by mounting the analyzer to a metal structure, or attaching a
ground cable with lug (3/8") to the left side mounting bolt.
The signal and power are supplied by a single 4 pin electrical
connector on the left side of the analyzer. The Insta-Trans is supplied
with a twenty-four inch cable which mates with the power/signal
connector. Other cable lengths are available or the mating connector can
be supplied for customer use, see spare parts list in the rear of the
manual.
Wiring: The Insta-Trans is equipped with a four pin removable
connector (screw connections). The connector allows the user to easily
install or remove the analyzer. The connector should be wired per
B71625, interconnection is per A71629 (D73226 for FM approved
installation).
For Factory Mutual approved installations, the interconnection
cable must not exceed the following values:
GP AB 0.09
f and 3 mH inductance
GP C 0.3
f and 1 mH inductance
GP D 0.9
f and 3 mH inductance
The cable or wire required will depend on the specific application. A
shielded cable should be used when ever possible to improve resistance to
radio interference. The wire gage should be selected based on the length