PART THREE - OPERATION
SECTION 4 - ANALYZER CONFIGURATION
Rev. 6-501
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
49
4.5 Configuring Relays
(A, B, C, and D)
☞
SET PARAMETER
(representation)
The analyzer may be equipped with up to four electrome-
chanical relays (A, B, C, and D). Each relay can be set to
function as a CONTROL, ALARM, STATUS or TIMER relay.
For details on each relay function, see subsection “SET
FUNCTION Mode.”
During calibration, CONTROL and ALARM relays can be
held, transferred to preset on/off states or remain active.
During normal measurement operation, CONTROL and
ALARM relays can be held at their present on/off states:
•
For up to 30 minutes by selecting the “HOLD
OUTPUTS” line in the TEST/MAINT menu and
pressing the
ENTER key
.
•
For an indefinite period by locally or remotely
connecting the TTL input Terminals 9 and 10 on TB1.
The output state (HOLD, XFER or ACTIVE) selected during
calibration always takes precedence over an applied TTL
input hold/transfer. For more details on order of precedence
for hold functions, refer to PART TWO, Section 3.6.
NOTE:
TIMER relays operate differently than CONTROL or
ALARM relays, and are affected differently. See the
TIMER relay description in the “SET FUNCTION
Mode” subsection for details.
These instructions configure Relay A. Configure other
relays in the same way using their respective menu
screens.
Each CONTROL or ALARM relay can be assigned to be
driven by the SENSOR (measured pH or ORP) or measured
TEMPERATURE.
1.
With the
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