Sensaphone 1800 - Manual (Page 118)

Sensaphone 1800 Manual
116
Cause
The zone isn’t configured to read a
4
– 20mA sensor.
Solution
Press SET and CONFIGURE to
program the zone. See Chapter 4 for
information on zone configuration.
4–20mA MONITORING:
Problem 1
Can’t program 4–20mA range; or the unit won’t read the 4–20mA
sensor.
Cause
a) No power connected to the
transducer.
b) Incorrect wiring.
c) The table range is incorrectly
programmed.
d) The input is not configured for
4 – 20mA.
e) Multiple devices connected in loop.
Solution
Connect a power supply as shown in
Chapter 2.
Inspect wiring. Make sure polarity is
correct as shown in Chapter 2.
Program the table range for the
cailibrated range of the transducer.
Configure the zone for 4 – 20mA.
Refer to Chapter 4.
The 1800 ’s zone is single-ended
and terminates to ground. Because
of this, the
1800 must be the last
device in the loop, and in some
cases the ONLY device. For certain
installations, it may be necessary to
use a signal isolator.
Problem 2
The zone input is not reading correctly.