16 Appendix
100
The cycle time (cleaning interval) can be adjusted in the range from 0.0 to
240.0 hours.
A cycle time of "0.0" means the wash timer is deactivated.
The wash time (cleaning duration) is adjustable from 1 to 1800 seconds.
During the wash time the controller goes into the HOLD state, which is
maintained for 10 seconds after completion of the wash time. A sensor
calibration within the cycle time restarts the wash timer.
USP contact (for ultra-pure water)
The USP contact makes it possible to monitor the quality of ultra-pure water
according to the requirements of USP <645>. USP <645> contains a table that
assigns a limit value for conductivity depending on the temperature. If the
conductivity stays below this limit value, the ultra-pure water meets the
requirements of USP <645>.
If the conductivity of the water is greater than what is specified in the USP
table for a given temperature, the USP contact switches the instrument.
Limit values are defined in levels. For example, a value of 5 °C is used at 8 °C.
Note:
During monitoring, temperature compensation must be turned off
(temperature coefficient = 0)!
To do this, select Administrator Level/Basic Setting/
Temperature Compensation/None.
Excerpt from USP <645>
If the conductivity is exceeded at the relevant temperature, the configured
contact switches.
USP warning alarm
The USP warning alarm switches before the water quality reaches the set limit
value.
This parameter (0 to 100) is used to set the distance as a percentage (relative
to the active limit value) to be maintained from the USP limit.
Temperature
°C
Max. conductivity
µS/cm (uncompensated)
Temperature
°C
Max. conductivity
µS/cm (uncompensated)
0
0.6
55
2.1
5
0.8
60
2.2
10
0.9
65
2.4
15
1.0
70
2.5
20
1.1
75
2.7
25
1.3
80
2.7
30
1.4
85
2.7
35
1.5
90
2.7
40
1.7
95
2.9
45
1.8
100
3.1
50
1.9
Summary of Contents for dTRANS CR 02
Page 83: ...83 12 Setup program Export data for processing in an external program...
Page 118: ...17 Index 118...
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