7
SECTION 2 - INSTALLATION
2-1. General
The instrument should be inspected at time of unpacking to detect any damage
that may have occurred during shipment.
Note: The unit was checked for accuracy at the factory — do not change any of
the settings during examination or accuracy will be affected.
For applications requiring special cleaning/precautions, a polyethylene bag is
used to protect the instrument from contamination. This bag should be removed
only under conditions of extreme cleanliness.
2-2. Mounting/Piping/DPU Installation
Refer to the Barton
®
Model 199 DPU user manual (Part No. 10030).
2-3. Electrical Connection (Switches/Relays)
Units are supplied with either single or dual alarm switches and/or relays
(depending on customer order). The direct-set switch contacts are adjustable
over the entire scale range.
Wiring diagrams on page 8 show the electrical connections for the switches.The
high switch and low switch setpoint adjustment procedures are covered in section
3-7, page 12. For physical location of switches and connections, see page 3.
2-4. Switch Use
Switch contact life is influenced by various application conditions such as tem-
perature, humidity, airborne contamination, vibration, amount of plunger travel,
cycling rate, and rate of plunger travel (and others), as well as by the electrical
(circuit) characteristics.
Note: Arc suppression for inductive loads will prolong the life of the switch
contacts.
Note: Due to their size, subminiature switches have small mechanical clearances;
therefore, no rating above 250 VAC has been established.
2-5. Startup
For startup procedures, warnings, and information, refer to the Barton
®
Model
199 DPU user manual (Part No. 10030).
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