User Manual
MEAS LT Level & Pressure Transducer User Manual
Measurement Specialties, Inc.
www.meas-spec.com
1-757-766-1500
1000 Lucas Way, Hampton, VA 23666 USA
17 of 31
1-800-745-8008
WL.sales@meas-spec.com
Appendix B: Frequently Asked Questions
1.
Question: What installation ideas do you have to help me get rid of electrical
noise interfering with the signal?
Answer:
We strongly encourage you to secure our cable shield to a good earth
ground and that you use a 4-20 mA signal output. Armed with these
precautions and the fact that many of our transducers are CE approved for
electromagnetic interference, you should have few problems. An ounce of
prevention goes a long way. Either try to eliminate the source of noise or
move the transducers as far away from it as possible.
2.
Question: The cable on the submersible transducer always seems to get cut and
damaged. What am I doing wrong?
Answer:
This is the most common problem that our users encounter. Make sure that
all of your colleagues and staff understand the importance of handling the
cable with care. The cable should not be bent around rough or sharp edges.
Always use a cable reel during transport. Where possible, suspend the unit
in a perforated 2” (50 mm) PVC pipe and thread the cable through protective
conduit to the nearest junction box.
3.
Question: I have an application where the transducer is frequently damaged by
voltage spikes. What can be done to prevent this?
Answer:
At a minimum, make sure the cable shield is connected to an earth ground
as near as possible to the transducer. We can provide a surge protection kit
for both our submersible and non-submersible transducers. See page 4.
These kits will handle typical spikes that might come in through the power
lines as well as surges that travel through the ground due to nearby lightning
strikes.
4.
Question: How much impact shock can your submersible transducers withstand?
Answer:
Our transducers are not shock tested and the lower pressure ranges can be
damaged if dropped from several feet onto an unforgiving surface like
concrete. We recommend that the protective shipping sleeve remain in
place until the unit is installed.
5.
Question: What is the response time of your transducer?
Answer:
From initial power up, the transducer output will stabilize within a fraction of a
second. The frequency response is rather low; probably less than 1 kHz, but
it depends on the application, the media, plumbing, etc. Call our factory for
application assistance if frequency response is critical in your application.