82
Ext. Control (DCS) (Administrator)
A/M input (40/41)
Return
25.6 °C
DCS output (34)
7.05 pH
DCS inputs (36...39)
Control
Off
M/S input (42/43)
On
active < 2 V
active 10...30 V
Alarm
Measure
DCS outputs (31…34)
N/O
active 10...30V
Selecting the Measurement
Procedure
• Continuous measurement:
With continuous measurement
the pH electrode is located in the
process medium and is retracted for
calibration or cleaning.
• Short-time measurement:
(interval measurement, sampling,
sample mode ...)
The pH electrode is only momen-
tarily moved into the process
medium. This method is applied
when measuring aggressive or ther-
mally demanding process media
which require short measurement
times with long rest periods.
Menu Display
• Meas. procedure
• External control via DCS
Installation (Administrator)
Access manual control
Return
25.6 °C
Probe
7.05 pH
Rinse water
Meas. procedure
Ext. control (DCS)
Short-time
Sensor detection
Continuous
External Control via DCS
• DCS inputs: Inputs for selecting the
control programs. Here, the active
signal level is specified.
( < 2 V or 10 ... 30 V).
• M/S input: Control of probe
movement
• A/M input: Intervals automatic /
blocked
• DCS output (34): Specify output sig-
nal for terminal 34:
- Measuring or
- Alarm
• DCS outputs (31 … 34):
Specify contact type (N/O, N/C)
Содержание Protos 3400
Страница 12: ...12 ...
Страница 160: ...160 ...
Страница 177: ...177 Appendix Buffer Table Mettler Toledo ...
Страница 179: ...179 Appendix Buffer Table DIN 19267 ...
Страница 181: ...181 Appendix Buffer Table Techn Buffers to NIST ...
Страница 182: ...182 Appendix Buffer Table Hamilton ...
Страница 183: ...183 Appendix Buffer Table Kraft ...
Страница 184: ...184 Appendix Buffer Table Hamilton A ...
Страница 185: ...185 Appendix Buffer Table Hamilton B ...
Страница 186: ...186 Appendix Buffer Table HACH ...
Страница 206: ...206 Index ...
Страница 207: ...207 Index ...