WIKA DI15 - Manual (Page 22)

Operating Instructions Digital Indicator DI15
V1.3 • 02/2011 - 22 -
- Press button 1 (if not already done). The device will be displaying “2.on“ (turn-on-point of output 2).
- Use button 2 and button 3 to set the desired value, the device’s output 2 should be turning on.
- Press button 1 to validate your selection. The display shows “2.on“ again.
- When pressing button 1 again, the device will be displaying “2.off“. (turn-off-point of output 2)
- Use button 2 and button 3 to set the desired value, the device’s output 2 should be turning off.
- Press button 1 to validate your selection. The display shows “2.off“again.
Now you finished configuring your device. Press button 3 to switch over to display the measuring value.
5.2. 2-point-controller with alarm function
This chapter describes how to configure the device as a 2-point-controller with alarm function.
This instruction demands that you selected “2P.AL as your desired output function like it is explained in
chapter 4.8.
- Press button 1 (if not already done). The device will be displaying “1.on“ (turn-on-point of output 1).
- Use button 2 and button 3 to set the desired value, the device’s output 1 should be turning on.
- Press button 1 to validate your selection. The display shows “1.on“ again.
- When pressing button 1 again, the device will be displaying “1.off“. (turn- off- point of output 1)
- Use button 2 and button 3 to set the desired value, the device’s output 1 should be turning off.
- Press button 1 to validate your selection. The display shows “1.off“again.
Example: You want to control the temperature of a cooling chamber between –20°C and –22°C.
Therefor you will have to select –20°C for the turn-on-point 1 “1.on“ and –22°C for the turn-off-
point 1 “1.off“. When the temperature rises above –20°C the device turns its output 1 on, when
falling below –22°C the device will turn its output 1 off.
Note: Depending on the inertia of your cooling circuit an overshooting of the temperature may be possible.
- When pressing button 1, the device will be displaying “AL.Hi“. (maximum alarm-value)
- Use button 2 and button 3 to set the desired value, the device should turn on its maximum-alarm.
- Press button 1 to validate your selection. The display shows “AL.Hi“ again.
- When pressing button 1 again, the device will be displaying “AL.Lo“. (minimum alarm-value)
- Use button 2 and button 3 to set the desired value, the device should turn on its minimum-alarm
- Press button 1 to validate your selection. The display shows “AL.Lo“ again.
- When pressing button 1 again, the device will be displaying “A.dEL“. (delay of the alarm-function)
- Use button 2 and button 3 to set the desired delay of the alarm-function.
Note: The unit of the value to be set is in [sec.]. The device will turn on the alarm after the
minimum resp. the maximum alarm value was active for the delay-time you have set.
- Press button 1 to validate the delay time. The display shows “A.dEL“ again.
Example: You want to have an alarm monitoring for the cooling chamber mentioned above. The alarms
should start when the temperature will be rising above –15°C resp. falling below –30°C.
Therefor you have to select –15°C for the maximum alarm-value “Al.Hi“ and –30°C for the mini-
mum
alarm-value “AL.Lo“.
The alarm will be starting after the temperature rises above –15°C and stays above –15°C for the
entered delay time resp. after it had been falling below –30°C and stays below –30°C for the en-
tered delay time.
Please note that the alarm-outputs are inverted! This means, that the output will be active if there is no
alarm!
Now you finished configuring your device. Press button 3 to switch over to display the measuring value.