Teledyne 3000ZA2G - Zirconium oxide analyzer - Manual (Page 30)

Installation 3000ZA2G
Teledyne Analytical Instruments 18
ZERO IN and SPAN IN (Auto Calibration Option):
With the auto calibration option there are additional ports for span and
zero gas connections. The auto calibration module uses electrically
operated valves for automatic switching between calibration and sample
gases. These valves are completely under control of the 3000ZA2G
electronics. They can also be externally controlled indirectly through the
remote cal inputs as described below.
Pressure, flow, and safety considerations are the same as prescribed for
the SAMPLE IN inlet above.
3.3.2 Calibration Gas
The Model 3000ZA2G will require periodic calibration on known
gases for maintaining the specified accuracy. Both zero and span
calibrations are required. Air (20.9% O
2
) must be used for the zero gas.
For span gas requirements, see Section 4.4. These gases must be
supplied to the instrument at the same pressure and flow as the sample
gas.
3.3.3 Electrical Connections
For safe connections, no uninsulated wiring should be able to come
in contact with fingers, tools or clothing during normal operation.
CAUTION: USE SHIELDED CABLES. ALSO, USE PLUGS THAT
PROVIDE EXCELLENT EMI/RFI PROTECTION. THE
PLUG CASE MUST BE CONNECTED TO THE CABLE
SHIELD, AND IT MUST BE TIGHTLY FASTENED TO
THE ANALYZER WITH ITS FASTENING SCREWS.
ULTIMATELY, IT IS THE INSTALLER WHO ENSURES
THAT THE CONNECTIONS PROVIDE ADEQUATE
EMI/RFI SIELDING.
3.3.3.1 P RIMARY I NPUT P OWER
The power cord receptacle and fuse block are located in the same
assembly. Insert the power cord into the power cord receptacle.
CAUTION: POWER IS APPLIED TO THE INSTRUMENT'S
CIRCUITRY AS LONG AS THE SWITCH ON THE
REAR PANEL IS IN THE ON POSITION. THE RED
SWITCH ON THE FRONT PANEL IS FOR SWITCHING
POWER ON OR OFF TO THE DISPLAYS AND
OUTPUTS ONLY.