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January 2009 UDA2182 Universal Dual Analyzer Product Manual 237
Select piping and valves based on chemical resistance and pressure ratings
Make the process connections as shown in Figure 15-12 or Figure 15-13. Materials and
components should be carefully selected for chemical resistance to process and buffer
solutions at anticipated temperatures. Be sure that valves and fittings have sufficient
pressure ratings to withstand pressure peaks which will occur when process flow is
blocked.
Minimize liquid volume in system
Keep pipe sizes small and couplings close to minimize the liquid volume in the system.
Smaller volumes require less buffer solution and less time to rinse and to calibrate.
Two-Point AutoCal Operation*
* One-point AutoCal and AutoClean operations omit
steps using Relay 3 and Relays 2 & 3, respectively.
TM
Two-Point Calibration
Interval Between
Cleaning/Calibration
(days or hours)
1.709"
Normal Operation
Resume Delay Time (seconds)
Rinse Duration
TIME
Relay 1 Activated
Standardize Duration, Relay 2 Activated
Slope Duration, Relay 3 Activated
(Same Period as Standardize)
Alarms Held
S4
S2
buffer
solution 2
process
sample
pH
electrode
to process
to drain
9782
S3
buffer
solution 1
S 1
rinse water
Items outside this area
provided by user
Figure 15-13 Two-Point AutoCal Operation