Myron L 760-A Aquaswitch - Manual (Page 15)

4.5.3 FULL SCALE CALIBRATION PROCEDURES
NOTE:
Before attempting to calibrate the 760-A Aquaswitch analog meter,
refer to Section 4.5.1.
STEP 1 Turn OFF main AC power.
STEP 2 Being careful no! to excessively strain the cables, unfasten
and remove the front panel.
STEP 3 Remove all five (5) wires from the 760-A Control board
terminal TB3. (See Fig. 4-1) .
STEP 4 By following the wiring diagram in Fig. 4-5, connect the
Calibrator Module’s lead wires to the 760-A Control board
TB3 terminal block connectors.
STEP 5 Turn ON the main AC power and verify that the 760-
A Aquaswitch analog meter is indicating a full scale
reading.
NOTE:
If the meter indicates an accurate reading, proceed to STEP 7. If
the meter does not indicate the appropriate reading, proceed to
STEP 6.
STEP 6 Turn the 760-A Control board’s Calibration trimmer (R8)
adjustment screw (see Fig. 4-1) until the meter displays
a full scale reading.
STEP 7 Remove the Calibrator Module’s lead wires and reconnect
the CS10 Cell cable wires as shown in Fig. 2-6.
4.6 PREVENTIVE CARE
The Myron L Company- recommends that the following Preventive
Care procedures be observed.
1 Try to prevent exposure to excessive heat and moisture.
2 The Aquaswitch main AC power source must be protected
against excessive voltage “spikes.”
3 Take care not to damage the Aquaswitch during handling.
NOTE:
Daily, weekly or monthly maintenance schedules are based upon
the frequency of use and the severity of the environment and
operating conditions.
STEP 1 Repeat the Aquaswitch Checkout procedures to
verify satisfactory operation and/or isolate possible
troubleshooting symptoms.
STEP 2 Check all cable connections to insure that they are free
of moisture and contamination.
STEP 3 Inspect and replace damaged component boards and
cable assemblies.
4.7 ALTERNATIVE VALVING CONFIGURATIONS AND
OPERATION FOR CONTINUOUS PROCESS WATER
NOTE:
The following methods will provide an uninterrupted water supply
to process if a fresh Dl bank is NOT in place when the other Dl
bank exhausts. Refer to Fig. 2 - and 2-5 on page 5.
OPTION 1 Requirements:
Continuous process. No interruptions allowed.
Connections:
“A” output (TB2-5) to “A” valve AND “B” valve.
“B” output not connected.
Bleed not connected.
Omit bleed valve.
Configure “A” valve Normally Closed & “B” valve
Normally Open.
OPTION 2 Requirements:
Continuous process. Holding tank between Dl beds
and process.
Purge ok but no prolonged shutdown.
Connections:
Bleed output (TB2-4) connected to bleed valve.
Bleed configured as Normally Closed.
Other connections same as Option 1.
OPTION 3 Requirements:
Continuous process. Purge required only at system
startup.
Connections:
Same as Option 2.
Add manual valve in line with Bleed Valve.
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