|
|
H5-ACDC-70 5 Channel ±72 AMP HALL EFFECT AC/DC CURRENT SENSOR NOTE: This sensor has adjustable sensitivity (gain)
Includes 12V wall transformer & Mounting Kit SATISFACTION GUARANTEED DELIVERY TIMES: 2 to 5 Days within US, 2 to 3 Weeks World Wide
72 Amp Version Now Offered on Amazon.com
|
3D MODELS AVAILABLE
|
SLDASM Solid Works Model Version 2011 |
ORDER OPTIONS
| MODEL |
DESCRIPTION |
CURRENT RANGE (AMPS) |
Channels (Sensors) |
SHIPPING COST OUTSIDE U.S. |
ORDER LINK |
|
H5-ACDC-70 |
5 Channel ±72 AMP HALL EFFECT AC/DC CURRENT SENSOR Adjustable Gain & Offset, comes with 12V Wall Adapter |
±72 |
5 |
Click on PayPal link and enter your country and shipping info for shipping cost |
or |
| H3-ACDC-70 |
3 Channel ±72 AMP HALL EFFECT AC/DC CURRENT SENSOR Adjustable Gain & Offset, comes with 12V Wall Adapter (this is a non stocked item and is built to order, requires 1 week lead time) |
±72 | 3 |
$229 |
125 Amp Range (these are built to order - and require a three week lead time between the order date and the date that it ships to you).
| MODEL |
DESCRIPTION |
CURRENT RANGE (AMPS) |
Channels (Sensors) |
Mounting Kit |
COST |
SHIPPING COST WITHIN U.S. |
COST |
SHIPPING COST OUTSIDE U.S. |
ORDER LINK |
|
H5-ACDC-125 |
5 Channel ±125 AMP HALL EFFECT AC/DC CURRENT SENSOR Adjustable Gain & Offset, comes with 12V Wall Adapter (NO MOUNTING PLATE KIT) |
±125 |
5 |
$269 |
$269 |
14.99 Priority Mail |
$269 |
Check PayPal link for calculations |
|
|
H5-ACDC-125-MK |
5 Channel ±125 AMP HALL EFFECT AC/DC CURRENT SENSOR Adjustable Gain & Offset, comes with 12V Wall Adapter (WITH MOUNTING PLATE KIT) |
±125 |
5 |
$299 |
$299 |
14.99 Priority Mail |
$299 |
Check PayPal link for calculations |
QUESTIONS / SUPPORT CONTACT
or EMAIL:
EMAIL IS BETTER - we check it all day long. But you can also try and call
360-545-3869 (U.S.)
| MODELS |
H5-ACDC-70 |
H5-ACDC-125 |
| CURRENT RANGE (Amps) |
±72 |
±125 |
| SENSITIVITY
(mV Per Amp Output) |
~41mV (For gain adjusted to 1x) ~410mV (For Gain adjusted to 10x) |
~24mV (For gain adjusted to 1x) ~240mV (For Gain adjusted to 10x) |
| PWR REQUIREMENTS |
12V – 20V DC, < 10W, 2.5mm ID Power Connector |
|
| ASBOLUTE MAX VOLTAGE OUTPUT RANGE |
-8.3V to +8.3 |
|
| RESPONSE TIME |
3 µ sec |
|
|
MAX CABLE
DIAMETER: 0.43"
|
|
MEASURING DC AMPS: For example, if your data logger has a voltage input range of 0 to 5 Volts and the max DC current you are expecting to see is 50 Amps, then you would adjust your V offset so your output is at zero volts when there is no current flowing through the wire. Next you would adjust your gain so that at 50 Amps DC, your sensor puts out 5 volts. There are two ways to accomplish this. (1) If you have a DC power supply that can put out 50 Amps of current, then turn it on at 50 Amps, and adjust your gain for each sensor so that your dc volt meter reads 5 Volts for each sensor. You can follow these steps: STEPS TO ADJUST GAIN WHEN NO CONSTANT CALIBRATED CURRENT SUPPLY EXISTS Why would you want to do this adjustment? ANSWER: TO get the highest resolution from your data acquisition system or data logger.
Check out a site like this one: p; p; p; p; p; http://www.doctronics.co.uk/voltage.htm
MEASURING AC: If you want to measure 50 Amps AC, and your data logger has a 0 to 10 Volt input range, then you would adjust your offset so that it sits at 5 Volts, and your gain so that the signal will hit 10 Volts at 50 Amps and 0 Volts at -50 Amps. If your data logger has a -5 to +5 voltage input range, then you would adjust the offset to zero volts to read an AC signal. Also if your signal is week, then loop the wire around the sensor multiple times and adjust the gain to its max setting. |
SOLAR CHARGING APPLICATION - EXAMPLE DATA FROM SENSOR
|
Below you can see real data from just one sensor for a solar panel / battery charging application. The green trend line represents data from the sensor. The red trend line has been converted to Amps using the following linear equation. (Vsensor - 4.0) / ~32mV In this case, the offset as left at 4 volts DC. And the gain is set to 1. As the sun comes up, current slowly flows into the batteries rising from 4 Volts DC to 4.5V DC. This corresponds to a current range of Zero amps up to 16 Amps shown in red on the right side of the graph. When someone in the home turns on an electric appliance then the current goes negative down to 2.6 Volts DC because it changes direction as it flows from the batteries into the House AC inverter which could be powering something like a refrigerator or washing machine. A value of 2.6 Volts DC output converts to a current value of ~ -45 Amps. Assuming these batteries are setup in a 24 Volt configuration, then you could use this current measurement to approximate how much power your batteries are putting out. In this case it would be about 1,080 Watt power output to the inverter. (24V X 45A = 1080 Watts)
|
QUESTIONS / SUPPORT CONTACT
360-545-3869 (U.S.)
or EMAIL:
| Below you can see a typical application
for data logging monitoring the current sensor data. In this case
the hall effect transducer offset was adjusted to zero using the
potentiometer. Then the gain potentiometers were are turned to the
lowest resistance setting which gives us a gain of ~1.
Next a LabVIEW software program ran while monitoring the Lab Jack
U3 data acquisition box as shown below. This box has a USB
connection to the computer as shown below. Then 20 Amps of DC
current was put through each sensor for a time interval of 10
seconds each. You can see that each sensor responded with a nice
square pulse at or around 780mV. This is because the sensors put out
about ~37mV per amp.
|
|
The U3-HV LabJACK Data Acquisition USB Box able to monitor up to 12 sensors at one time with adjustable sampling rates over 1,000 samples per second. Technical Details
Comes with free LJscope.exe O-scope software program. It's like having your own USB O-scope!! You will be able to data log all your data to your computer hard drive with the free software from Labjack.com! It also comes with software drivers that you can use to acquire the data like LabVIEW, visual basic, C++ and many more. $129.00 ORDER HERE: U3-HV From Amazon |
 
|
|
 |
|
FAQ:
Can this sensor
measure negative current and positive current?
ANSWER: Yes it measures negative current as well as positive.
The transducer output range can be adjusted to have an offset of 5 Volts DC,
so that with no current, the output is 5 Volts, if the sensor were to
see -10amps, the voltage would drop down to somewhere near 4.6VDC with Gain
set to one. And if it were to see +10 amps, the sensor output would go
up to somewhere near 5.4 Volts. Or you could adjust
the offset down to zero volts so that if the sensor detects negative
current, it will put out a negative voltage proportional to the amount of
current it is seeing.
When measuring AC
current, does this sensor put out an AC or DC signal.
ANSWER: It puts out an AC signal.
If I am using this
with a 24 Volt battery application can I just hook the operating power up to
the battery?
ANSWER: Yes, this device can take a 12 to 30 Volts DC power supply to
excite the transducer using the black 2.5mm positive center.
How can I monitor
current from a PWM (Pulse width modulation) signal?
ANSWER: There are two ways of doing this. First is for you to
get a data acquisition box that can sample at least 10 times the frequency
of your pulse width modulation. Then you would be able to use software
like LabVIEW to integrate the area under the waveform to get an accurate
current calculation. The second method would be to put an
averaging capacitor on the output of the current sensor with a weak drain to
ground like 10k Ohm. You could them calibrate the outuput value using
a known good standard like reading the voltage drop across a shunt with an
O-scope. Since this sensor has a 3us response time, you will be able
to monitor PWM current up to about 300,000Hz . If you need more
help with this contact me at
support@measure-current.com
What is the absolute
maximum current this device can measure?
ANSWER: This board uses high quality
CSLA2CD transducers made by Honeywell (datasheet
here)
It
has a max current specification of 72 Amps. If you want to measure
more current then that, you could purchase the model CSLA2CF sensor and
install them easily on the same board which would get you up to the
120 Amps input range.
How can I use this
sensor for low current situations less then one amp?
ANSWER: All you have to do is loop the wire through the sensor multiple
times until you get the signal strength you need. Then divide the
measurement you are getting by how many loops you have put through the
sensor. For example, if you loop your current carrying wire through the
sensor 10 times, and you get a measurement of 4.032 and your sensor measures
4.0 when no current is flowing through the transducer, then the approximate
current calculation would be :
((4.032 - 4.0)/ 0.033) / 10
= 0.096 Amps or 96mA
|
ADJUSTABLE GAIN POTENTIOMETERS BELOW ALLOW YOU TO MAKE THE SIGNAL AS BIG OR SMALL AS YOU WANT FROM 1X to 10X
|
THE VOLTAGE OFFSET POTENTIOMETERS SHOWN BELOW ALLOW YOU TO ADJUST SIGNAL VOLTAGE DC OFFSET (0 to 4V DC)
|
QUESTIONS / SUPPORT CONTACT
360-545-3869 (U.S.)
or EMAIL:
![[ENLARGE]](http://measure-current.com/images/labjack-dc-current-sensor-monitoring-logging-hall-effect-transducers.jpg){kind=link}