Instruction manual

Instruction manual αlpha DO 2000
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7.2 Manual relay mode
In manual relay mode, you can manually turn “on” and “off” the control devices connected to
Relay A, Relay B or Wash relay.
1. While in Measurement mode press the MODE key.
2. The display prompts you to enter the security code. Press the ▲ or ▼ key to set security
code to “22”.
3. Press the ENT key. The Manual relay mode is activated and the relay mode LED “Manu” lights.
Note: Pressing ENT key at a value other than “22” will cause the transmitter to
revert to Measurement mode, and the relays will remain in automatic mode.
4. Press the REL key to select either Relay A, Relay B or Wash relay. The corresponding LED (A,
B, or W) turns to red.
The manual control options now available depend on the control type (limit, pulse frequency,
or pulse length) you selected and set in section 6.5.
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MEAS
If you selected Limit control: The display shows the current
measured value and “OFF” or “ON” depending on the relay status of
the currently selected relay.
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MEAS
If you selected Pulse length control: The display shows the current
measured value (upper value) and the on time as a percentage of the
current duration set in the CNTR sub-function in setup mode (lower
value).
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If you selected Pulse frequency control: The display shows the
current measured value (upper value) and the pulse frequency
(lower value).
5. Press the ▲ or ▼ key to change the Relay on/off status, pulse length, pulse frequency or
wash function. The relay status LED at the right of the transmitter will also change from Red to
Green.
Note: Note: If you wish to manually change the status of relays, press the REL key
at this point and repeat step 5 for the other two relays. The relay(s) will remain
under manual control while you are setting a relay.
6. Press the MODE key to return to Measurement mode. The relays are now back to automatic
control.