3 Functional description
The control module delta
®
enhances the delta
®
range of pumps to
become measurement variable-dependent metering pumps. The
control module delta
®
has an active 4-20 mA input for use in combi‐
nation with pHV1, RHV1 measuring transducers or chlorine
sensors CLE-mA. The control module
delta
®
uses PID control
behaviour to adapt the delta
®
solenoid metering pump precisely to
the requirements of the process. If a two-sided control is required,
a second pump can be controlled via the optional pacing relay.
Table of measured variables: Assignment of the measured variable to the measuring input of the control
module delta
®
Measured variable mA input Part no.:
Chlorine X
pH X* 809126
Redox X* 809127
* with measuring transducer
3.1
Application examples for the control module delta
®
Fig. 1: Application examples for pH or Redox for one-way control
1. Measurement water inflow (30 - 60 l/h)
2. Flow gauge (Part of the DGMA)
3. pH sensor (PHEP 112SE) or Redox sensor
(e.g. RHEP-Pt-SE)
4. pH measuring transducer (pHV1 / 809126) or
Redox measuring transducer (RHV1 / 809127)
5. Universal control wire (e.g. 1001300)
6. External wire (2-pin / e.g. 707702)
7. Metering tank with two-stage lance
8.
Relay cable (part of the delta
®
solenoid
metering pump)
Brief functional description
Functional description
11
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