Connecting The Automatic Calibration Check System; Connecting Reference Air To 1231 Probe - Novatech 1635 User Manual

2.13 CONNECTING THE AUTOMATIC CALIBRATION CHECK SYSTEM

The purge and calibration solenoid valves are supplied with mains voltage. This supply has electrical shock danger to
maintenance personnel. Always isolate the analyser before working with the purge and calibration solenoid valves.
The on-line auto calibration check system is optional. For details on its operation refer to Sections 1.1. Typical
connection details are shown in Figures 3.10 (a) and (b).
After installation the calibration checking system should be tested thoroughly for leaks. Any leaks can cause significant
errors if the dryer or oven is at negative pressure. If the dryer or oven is at positive pressure, an outward leak can cause
corrosion in the calibration checking system piping and fittings.
T o O xygen Probe
'C A L ' port

2.14 CONNECTING REFERENCE AIR TO 1231 PROBE

For the oxygen probe, a 1/4" tube connector on the analyser should be connected via a nylon, copper or stainless steel
tube to the 'REF' connector on the probe.
If two probes are being used, a "T" union must be supplied to provide reference air supply to both probes.
August 2009
1635 Water Vapour Analyser
CAUTION
Automatic Purge & Calibration check System Wiring
C alibration C heck G as
Flow meter/ R egulator
5 litres/ min
Automatic Purge & Calibration check System Piping
110/ 240V A C
From terminals 43 & 44
110/ 240V A C
From terminals 45 & 46
110/ 240V A C
From terminals 41 & 42
C A L C heck G as #1
100 kPa max
C A L C heck G as #2
100 kPa max
C lear & D ry Purge
A ir Supply
100 kPa M ax
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