Jesco MEMDOS E - Alarm

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 ▼ keys 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. Up to 64 pulses are buffer-stored if
the pulse rate exceeds the processing speed. To set the pulse multiplication/division, simultaneously 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 doses proportionally 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 warning alarm 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 warning alarm 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
Operation | Operation & Maintenance Instructions | 25