™
By Miltronics Mfg. Svcs., Inc.
Phone: (603) 352-0187
95 Krif Road EFax: (603) 352-7649
Keene, NH 03431 USA [email protected]
DA400 User Manual, PN 10075 Miltronics Mfg. Svcs., Inc.
Rev 3.5, 01-Aug-2019
www.pacer-instruments-usa.com
Page 16 of 28
APPENDIX D – ANALOG OUTPUTS (IF EQUIPPED)
If the instrument is equipped with the analog output option, there will be a five-
pin connector on the bottom of the instrument. Also, an analog output cable will
be included with the instrument. This cable will have a five-pin connector on
one end and four tinned wires on the other end.
The instrument will output a Voltage between 0 and 5 Volts that corresponds to
the Air Velocity measured by the instrument. The output range, pin
assignments, and wire colors are given in the table below. Also shown is a
block diagram of the analog output circuit.
Corresponding
Wire
Analog
Output
Measurement
Equation* to convert from
Color
Pin
#
Function
Voltage
Range
Range
Volts (
V
) to Measurement
Value
BLK
1
Ground
--- N/A ---
--- N/A ---
--- N/A ---
GRN
2
Air Velocity
0 to 5
Volts
0 to 10,000
FPM
Air Velocity = 2000×
V
GRY
3
--- Not Used ---
--- N/A ---
--- N/A ---
--- N/A ---
WHT
4
--- Not Used ---
--- N/A ---
--- N/A ---
--- N/A ---
*To convert from Volts to Air Velocity in Feet per Minute, multiply by 2000.
► For example, an analog output of 2.375 Volts means that the instrument is
measuring an air velocity of 4750 feet per minute (FPM).
► 2.375 Volts
×
2000 = 4750 FPM
Note:
When using analog outputs, there is an
additional ±1% error
in the
analog output voltage. This is in addition to the normal measurement error.
► For example, an air velocity reading of 500 FPM would normally have an
accuracy of ±1% of reading ±1 digit (±6 FPM) when the data is viewed
on the LCD display.
► With the additional error associated with the analog output voltage, the
effective accuracy of the analog output for this air velocity measurement
will be ±2% of reading ±1 digit (±11 FPM).
Custom Analog Voltage Outputs are also available – contact Pacer for details.
