Initial Power Up; Basic Connections; Remote Control Connections; Chamber Temperature - Valco Instruments Co. Inc. 340-0X Instruction Manual

Initial Power-Up

Basic Connections

Remote Control Connections

Chamber Temperature

1. Plug the power cable from the main power connector on the rear panel of the
calibrator to a 110 VAC power source (220 VAC with Model 340-C).
2. If you do not have the pump option:
Connect the carrier gas source (50 psi maximum pressure) to the carrier inlet
on the rear panel.
If this is a dual inlet system:
Connect appropriate source gases to the carrier inlet and dilution gas inlet.
The source must be of sufficient capacity to flow the maximum LPM of the
sum of dilution and carrier combined on a single inlet system. The carrier
inlet source must be able to provide at least 500 SCCM, and the dilution inlet
must be able to source the maximum dilution flow, which may be as high as
20 SLPM.
3. Turn on the calibrator with the main power switch on the front panel. This
supplies the fans, the control valves, and the pump, if so equipped.
4. Turn on the heater switch on the front panel. The display on the permeation
chamber cover will display a boot sequence, followed by a display of the
actual temperature.
5. Connect the span outlet to your instrument.
Always leak check the entire instrument and all flow connec-
tions, particularly if toxic, corrosive, or flammable gas mixes
will be generated.
Use clean/dry air or N
verify the leak integrity of the system before putting it into
service.
When the front panel mode selector is in the REMOTE position, the operating
mode can be selected by providing contact closures between the two rear panel
remote control terminals, labeled C (common) and V1. The contact closures must
be capable of handling 24 VAC at 0.5 amps into an inductive load.
When C and VI are open, the Model 340 is in the ZERO mode. When V1 is closed
to C, the unit switches to the SPAN mode.
Important Chamber Temperature Considerations
• If the chamber temperature exceeds the value set by the mechanical
temperature limit switch, the heater will automatically shut down and
a warning screen will appear on the touch screen controller.
• hen the front panel door is removed, the heater automatically shuts down.
• Always refer to the separate instructions accompanying the permeation
tube(s) to make sure that the selected temperature is compatible with the
permeation tube(s) being used.
to perform a pressure/decay test to
2
15