Oldham MX62, Инструкция по установке и эксплуатации

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3.4.2. Operational Test
Switch Position 2
The operational test is indicated by blinking of the LED for ‘fault’, the relays are
activated whatever the type of (positive/negative) security chosen. All other
LEDs for the channel and the allocated relays are activated. The analog output
signal is set to 2mA.
3.4.3. Calibration
Switch Position 3
The calibration function is indicated by blinking of the LED for ‘fault’. As with
alarm suppression, the relays are not activated and the LEDs are blinking in case
of alarm, excess of measuring range or insufficient signal. In addition, the meas-
uring range is automatically reset to 4-20mA since remote calibration for stan-
dard transducers allows adjustment of the 4-20mA. The transducer can now be
cali-brated on site (eg with the aid of potentiometers or via infrared communica-
tion). The analog output signal is set to 2mA. (see
5. Maintenance)
3.4.4. Channel On/Off
Switch Position 4
Should a channel be deactivated, the green LED for ‘power’ of the respective
channel switches off. With a deactivated channel, the measuring signal is not
evaluated. In case of alarm, fault, etc., the LEDs and relays are not activated.
Channel deactivation will remain even after the maintenance mode has been
terminated. The analog output signal is set to 0mA.
! ! Attention ! !
Even if the channel is switched off, the transducer will be provided with
24V. For works to be carried out at the transducer in a hazardous area,
power to the transducer must be disconnected.