Model PD655 Large Display Process Meter
Instruction Manual
14
Isolated 4-20 mA Transmitter Output
CALIBRATION
RANGE
The transmitter output can be calibrated so that a 4 mA output
is produced for any process/rate measured by the meter. The
20 mA output may correspond to any process/rate that is at
least 501 counts greater or smaller than the process/rate
corresponding to 4 mA. (Ex. 4 mA = 0, 20 mA = 501) If the
span between 4 and 20 mA is less than 501 counts, an
error
message will appear.
EQUIPMENT
NEEDED
The 4-20 mA output from the meter is calibrated without the
use of a calibrator.
OUTPUT LOOP
POWER SUPPLY
24 VDC ± 5% @ 20 mA, regulated. Maximum loop resistance
is 1200
Ω
. Isolated from input transmitter power.
ACCURACY
± 0.1% F.S., ± 0.004 mA
ISOLATION
500 VDC or peak AC, input-to-output or input/output-to-power
line
EXTERNAL
LOOP-POWER
SUPPLY
35 VDC maximum
OUTPUT LOOP
RESISTANCE
Power supply
Minimum loop
resistance
Maximum loop
resistance
24 VDC
10
Ω
600
Ω
35 VDC (external)
600
Ω
1000
Ω
