Installation Instructions for the
Honeywell ZephyrTM Digital Airflow Sensors
HAF Series–High Accuracy
50045178
Issue E
±±5 SꢀꢀM to ±ꢁ±5 SꢀꢀM
GENERAL INFORMATION
Table 2. Operating Specifications
ꢀharacteristic
Parameter
Notes
ꢀAUTION
Supply voltage:
3.3 Vdc
5.0 Vdc
Power:
3.3 Vdc
5.0 Vdc
IMPROPER USE
3.3 Vdc ±±0ꢀ
5.0 Vdc ±±0ꢀ
—
Do not use to sense liquid flow.
Failure to comply with these instructions may result in
product damage.
40 mW max.
65 mW max.
±
Compensated temperature
range
0 °C to 50 °C
[32 °F to ±22 °F]
2
ꢀAUTION
Operating temperature
range
-20 °C to 70 °C
[-4 °F to 158 °F]
—
IMPROPER ꢀLEANING
• Avoid cleaning the sensor; however, if it must be cleaned use
isopropyl alcohol and dry the device thoroughly before use.
Cap the ports or connect housing to the ports before cleaning
the sensor with alcohol. Using alcohol may remove the text on
the sensor label; however, the label ID is hard coded inside the
sensor.
• Do not use III Tri-chloroethane, methylene chloride, methyl
pyrrolidone, or any oxidizing type acid such as formic acid.
• Do not use ultrasonic cleaning.
Warm-up time
30 ms
3
4
Calibration media
gaseous nitrogen
I2C fast mode (up to 400 kHz)
Bus standards
Reverse polarity protection
Notes:
1. Maximum power: Is measured under the conditions of the highest supply
voltage, Vsupply + 10%, 70 °C, full scale flow and with the minimum load
specified for that supply voltage.
2. Custom and extended compensated temperature ranges are possible.
Contact Honeywell for details.
3. Warm-up time: The time to the first valid flow measurement after power is
applied.
5
no
—
Failure to comply with these instructions may result in
product damage.
4. Default calibration media is dry nitrogen gas. Please contact Honeywell for
other calibration options.
5. Refer to the Technical Note “I2C Communications with Honeywell Digital
Airflow Sensors” for I2C protocol information.
CAUTION
LARGE PARTICULATE DAMAGE
Table 3. Environmental ꢀharacteristics
Use a 5-micron filter upstream of the sensor to keep media flow
through the sensor free of condensing moisture and particulates.
Large, high-velocity particles or conductive particles may
damage the sensing element.
ꢀharacteristic
Humidity
Shock
Parameter
0% to 95% RH, non-condensing
100 g, 11 ms
Failure to comply with these instructions may result in
product damage.
Vibration
ESD
15 g at 20 Hz to 2000 Hz
Class 3B per MIL-STD 883G
Table 1. Absolute Maximum Ratings
Table 4. Wetted Materials
ꢀharacteristic
Covers
ꢀharacteristic
Parameter
-0.3 Vdc to 6.0 Vdc
-0.3 Vdc to Vsupply
-40 °C to 125 °C [-40 °F to 257 °F]
5.0 SLPM/s
Parameter
high temperature polymer
PCB
Supply voltage
Substrate
Voltage on I/O output pin
Storage temperature range
Maximum flow change
Maximum common mode pressure
Maximum flow
Adhesives
epoxy
Electronic components
Compliance
silicon, gold
RoHS, WEEE
25 psi at 25 °C [77 °F]
±0 SLPM
Table ±. Recommended Mounting and Implementation
ꢀharacteristic
Parameter
Mounting screw:
size
NOTIꢀE
5-40
torque
0.68 N m [6 in lb]
Absolute maximum ratings are the extreme limits that the device
will withstand without damage to the device. However, the
electrical and mechanical characteristics are not guaranteed as
the maximum limits (above recommended operating conditions)
are approached, nor will the device necessary operate at
absolute maximum ratings.
Silicone tubing for long
port style
O-ring:
short port style
long port style
70 durometer; 0.125 inch inside
diameter, 0.250 inch outside diameter
AS568A, Size 7, Silicone, Shore A 70
AS568A, Size 10, Silicone, Shore A 70
5-micron filter upstream of sensor
Filter