+john Kosheluk Hi John: Normally you can take the total controller current and divide it by the manufacturer spec'ed current for each decoder to determine the number of decoders on the cable. It is important to use a True RMS meter for accuracy. The decoder currents can vary from about 6 mA to 0.6 mA depending on model and what power feed source you are using. When a valve is operated the current can pop up by another 200 mA, then drop back to basic 'resting' levels. When fault-finding you will be looking for currents that are somewhat larger than expected or lower - the faults are typically splices (open splice = lower current than expected) or short circuits (failed decoders or wet splices = current higher than expected). - Jim Carefoot
no , you cant do that, you can be fooled by one faulty one on line and also resistance along the wire changes, you must do one by one because lets say how do you know # 10 value ? you must know the value from #1 to #9 right? you could assume by doing it your way but i still highly doubt it .
When checking voltage and current it is best for the controller to be idle. If the controller has a fault-finding or short-finding mode use that for the steadiest readings. Even in idle the readings on the control cable can jump around, and ultimately measurements are best made with the control cable disconnected from the controller and fed by an outside 24 Vac power supply (we often use a small AC wall plug-in for that). You can use a controller 24 Vac power supply to feed the cable if you use it with an AC valve solenoid in line to protect against dead shorts.
The Benning CM 11 meter is very similar, though we have some differences. We removed DC current reading for one thing. Some of the controls are modified for our irrigation market.
if u have a 200 mil. line and a decoder draws .6 mil do u subtract .6 from 200.mil and add all the decoder in line to c what thay are
+john Kosheluk
Hi John:
Normally you can take the total controller current and divide it by the manufacturer spec'ed current for each decoder to determine the number of decoders on the cable. It is important to use a True RMS meter for accuracy. The decoder currents can vary from about 6 mA to 0.6 mA depending on model and what power feed source you are using.
When a valve is operated the current can pop up by another 200 mA, then drop back to basic 'resting' levels.
When fault-finding you will be looking for currents that are somewhat larger than expected or lower - the faults are typically splices (open splice = lower current than expected) or short circuits (failed decoders or wet splices = current higher than expected). - Jim Carefoot
no , you cant do that, you can be fooled by one faulty one on line and also resistance along the wire changes, you must do one by one because lets say how do you know # 10 value ? you must know the value from #1 to #9 right? you could assume by doing it your way but i still highly doubt it .
When checking for miliamps does the controller have to be running zones, run mode or off position?
When checking voltage and current it is best for the controller to be idle. If the controller has a fault-finding or short-finding mode use that for the steadiest readings. Even in idle the readings on the control cable can jump around, and ultimately measurements are best made with the control cable disconnected from the controller and fed by an outside 24 Vac power supply (we often use a small AC wall plug-in for that). You can use a controller 24 Vac power supply to feed the cable if you use it with an AC valve solenoid in line to protect against dead shorts.
=bennig cm11?
The Benning CM 11 meter is very similar, though we have some differences. We removed DC current reading for one thing. Some of the controls are modified for our irrigation market.
How many indian rupee clamp meter
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