Honeywell P7650A Series Installation Instructions Manual page 5

Table 5. P7640U Universal Model, Field Selectable (P)
Pressure or (V) Velocity Mode, Field Selectable
(WC/FPM or Pa/MS).
(P) Pressure Mode
0 0 to 0.1 in. WC
(0 to 25 Pa)
1 0 to 0.25 in. WC
(0 to 50 Pa)
2 0 to 0.5 in. WC
(0 to 100 Pa)
3 0 to 1 in. WC
(0 to 250 Pa)
4 0 to 2.5 in. WC
(0 to 500 Pa)
5 0 to 5 in. WC
(0 to 1000 Pa)
6 0 to 10 in. WC
(0 to 2500 Pa)
7 0 to 10 in. WC
(0 to 2500 Pa)
8. Connect the transmitter to the control system and
power supply as indicated below. Optional: Connect
the ZERO terminals to the digital output (contact
closure) of the control system.
ZERO
RMT.
ZERO
DIGITAL
OUTPUT
DIGITAL
CONTROL
RETURN
V+
Fig. 7. 2-wire, 4-20 mA Current Loop Output.
DIGITAL
OUTPUT
DIGITAL
CONTROL
RMT. ZERO
V IN
–
–
POWER
SOURCE
24 VAC/DC
+
Fig. 8. 3-wire, 0-5 V/0-10 V Voltage Output.
(V) Velocity Mode
0 0 to 500 FPM
(0 to 2.5 MS)
1 0 to 1000 FPM
(0 to 5 MS)
2 0 to 2000 FPM
(0 to 10 MS)
3 0 to 3000 FPM
(0 to 15 MS)
4 0 to 4000 FPM
(0 to 20 MS)
5 0 to 5000 FPM
(0 to 25 MS)
6 0 to 6000 FPM
(0 to 30 MS)
7 0 to 7000 FPM
(0 to 35 MS)
1.000
M37262
ZERO
1.000
M37263
9. Wait five seconds, then press and hold the ZERO
pushbutton for two seconds or provide contact clo-
sure on the AUX ZERO terminal. This will reset the
output and display to zero pressure. For best accu-
racy, press the ZERO button while both ports are
open to atmospheric pressure. To protect the unit
from accidental zero, this feature is enabled only
when the detected pressure is within about 0.1 in.
WC (25 Pa) of factory calibration.
10. Connect desired external tubing to the P7650A/B/U.
P7650A/B/U Series devices employ high performance
sensors and sophisticated temperature compensation
circuitry. The sensor achieves its best accuracy after an
initial warm-up period. During the first few minutes of
operation, readings at zero pressure and the lowest
pressure ranges appear erroneous. Following this initial
warm-up period, the P7650A/B/U device maintains its
specified accuracy and stability.
The LCD momentarily indicates range 'SET' when a
selection is made. Pressure is normally indicated on the
display. Units are in inches water column (in. WC),
Pascals (Pa) or kilopascals (kPa) as indicated on the
display. The display shows 'OVER' when the pressure is
over range.
5
P7650A/B/U
31-00138—02