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P7635 DIFFERENTIAL AIR PRESSURE SENSORS
Zero Adjustment
The Zero adjustment should only be performed with no
pressure applied.
Small positive or negative pressure offsets can be
removed using the Zero push button. Make sure that there
is no pressure at the HI and LO pressure fittings.
Additionally, a small piece of tubing can be connected
between the HI and LO brass fittings to neutralize any
external pressure effects. Press and hold the Zero button
for 5 seconds. The P7635 will enter zero mode AFTER
push button is released.
SPECIFICATIONS
Supply Voltage
250 Ohm Load: 16-36 VDC / 24VAC ± 10%, 50/60 Hz
0-5 VDC: 12-36 VDC / 24VAC ± 10%, 50/60 Hz
500 Ohm Load: 21-36 VDC / 24VAC ± 10%, 50/60 Hz
0-10 VDC: 16-36 VDC / 24VAC ± 10%, 50/60 Hz
Supply Current mA [Power Consumption]
4-20 mA Output: 23 mA minimum [0.83 VA]
VDC Output Signals: 5 mA maximum [0.18 VA]
Output Signals
4-20 mA: 2-Wire Loop Powered (Output limited to 20.5
mA Max.)
4-20 mA: 3-Wire, VAC Powered (Output limited to 20.5 mA
Max.)
0-5 VDC or 0-10 VDC: 3-Wire, VAC, or VDC Powered (Out-
put limited to 5.25 and 10.25 VDC)
Sensor Accuracy: ± 0.5 % FSO (Standard)
NOTE: Accuracy includes linearity, hysteresis, and
repeatability.
Operating Temperature Range: 32 to 185°F (0 to 85°C)
31-00147—01
Compensated Temperature Range: 32 to 122°F (0 to
50°C)
Humidity: 10 to 95% RH, non-condensing
Thermal Effects: ± 0.056% FSO/ºF (± 0.10% FSO/ºC)
NOTE: Shift is relative to 77ºF (25ºC)
Warm Up Time: 15 minutes
Response Time (T95): 8 seconds
Output Update Range: 1 Second intervals
Zero Function: Pushbutton Zero Function (Recom-
mended after 15 minutes warm up)
Proof Pressure [Burst Pressure]
Ranges < 1" wc (248.84 Pa): Proof: 270" wc (67.2 kPa)
[Burst: 415" wc (103.3 kPa)]
Ranges > 1" wc (0.2488 kPa) to < 10" wc (2.488 kPa):
Proof: 350" wc (87.12 kPa)
[Burst: 550" wc (136.9 kPa)]
Media Types: Dry air or inert non-conductive gases
Din Rail Mounting: 35 mm (U.S. Patent No. 7,416,421)
Wire Connections [Wire Size]: 3 Position de-pluggable
screw terminal block
[14 AWG (1.628 mm2) to 24 AWG (0.5105 mm2)]
Terminal Block Torque Rating: 4.43 to 5.31 in-lbs.
(0.5 to 0.6 Nm)
Tubing Size Accepted:
0.250" (6.35 mm) O.D. x 0.170" (4.318 mm) I.D.
Push-On Flexible Poly Tubing
Enclosure Material [Flame Rating]: Polycarbonate [UL
94V-0]
Approvals: CE, RoHS2, WEEE
WEEE Directive
At the end of their useful life packaging and product
should be disposed of via a suitable recycling center. Do
not dispose of with household waste. Do not burn.
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