Jesco FEDOS E 5, Operating Manual

Page: 22 / 48

Key Display Description Key Display Description
Mode +
▼
INT Manual control Mode +
▼
64.1 Pulse control
▼ 1.64 Pulse control ▼ 32.1
▼
1.32
▼
16.1
▼ 1.16 ▼ 8.1
▼
1.8
▼
4.1
▼
1.4
▼
2.1
▼ 1.2 ▼ 1.1
▼
4.20 Analogue control
▼ 0.20
Manual control
The dosing pump delivers a constant flow of chemical per unit time, regardless of the process.
To set this operating mode, proceed as follows:
1. Press the "Mode" and
▲
or
▼
key simultaneously until INT is displayed.
2. Release the "Mode" key. The current stroke frequency is displayed (strokes/min)
3. Use the
▲
and
▼
keys to change the stroke frequency
Pulse control
The dosing pump delivers a constant flow of chemical per input pulse. A maximum of 64 pulses are buffer-
stored, if the pulse rate exceeds the processing speed. To set the pulse multiplication/division, simultane-
ously press the "Mode" and
▲
or
▼
keys until one of the following values is displayed:
• for a ratio of 1:1, i.e. the dosing pump executes one dosing stroke after each pulse,
• 1.2 to 1. 64 for pulse multiplication or
• 2.1 to 64. 1 for pulse division
The "Extern" indicator is lit.
Settings for pulse multiplication and division: 1, 2, 4, 8, 16, 32 and 64.
Example
1. 64 The dosing pump executes 64 dosing strokes after each pulse.
64. 1 The dosing pump executes one dosing stroke after 64 pulses.
Analogue control
The dosing pump delivers a quantity of the chemical proportional to the input signal. To set the operating
mode, press the "Mode" and
▲
or
▼
keys simultaneously until one of the following values is displayed:
• 0. 20 for 0 … 20 mA signal or
• 4. 20 for 4 … 20 mA signal
When the "Mode" key is released, the stroke frequency corresponding to the current is displayed. The
"Extern" indicator is lit. If the current is greater than 20 mA (display: OVL) or less than 4 mA (display: E-I),
the alarm indicator is lit, the fault signalling relay switches and the dosing pump stops. The stroke frequency
of the dosing pump is proportional to the input signal.
8.5 Alarm
The dosing pump allows monitoring of the dosing process. An alarm is indicated visually on the display and
transmitted by the fault signalling relay.
Alarm LED Alarm relay Pump Display
Level pre-alarm flashes switches continues to operate Number of strokes
Level main alarm is lit switches stops E - L
Internal error
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| Operating Manual FEDOS E/DX | Operation