General Specifications
This is a list of specification parameters for the EDS model "A" with calibration schedule "D". These specifications are operational and
performance standards (or limits) against which the EDS was tested or calculated. Specifications are subject to change without notice.
Operating Voltage & Current @ 25° C. @ 25% RH. (measured from mean, in "D" & "N" mode)
Min:
6.75 VDC @ 2.55 ma. idle (2.95 ma. mean with typ operation)
Nom:
8.00 VDC @ 3.75 ma. idle (4.15 ma. mean with typ operation)
Max:
15.0 VDC @ 5.10 ma. idle (5.65 ma. mean with typ operation)
Reverse voltage protection
Diode shunt ( 3 amp max @ 750 mv., no internal fuse or overvoltage regulator is provided)
Battery test fault voltage point (measured from mean)
Nom:
6.25 VDC @ 25° C. @ 25% RH @ 140 ma. during battery test
Battery Life (measured from mean, assuming fresh alkaline battery operating under typical operating conditions)
Nom:
40 Hrs @ 25° C. @ 25% RH
Valve life:
200 million cycles Min. @ 25 psig. @ 25° C.
Operating Temperature and Humidity (assumes nominal operating voltage)
Min:
0% RH @ -55° C to +80° C.
Nom:
25% RH @ +25° C.
Max:
100% RH @ +50° C. near condensing
Vibration
Random vibration 5 to 500 Hz, 15 minutes per axis @ 2.5 g. (rms) sin wave
Operating pressure range (pressure altitude)
Min:
3.4 psia. @ 25° C. (appx 30,000 ft.)
Max:
20.0 psia. @ 25° C. (appx. -1,000 ft.)
Responsive:
13.70 to 2.70 psia. @ 25° C. (Operational responsive pressure curve range)
Accuracy (sum of pressure hysterisis and linearity through full span)
+- 2.5% @ 13.70 to 4.7 psia. @ 25° C.
+- 2.5% temperature effect (from 0° C. to 50° C. @ 25% RH) on accuracy and offset
Repeatability (for absolute pressure hysterisis and linearity)
+- 2.5% through full span of 13.70 to 4.7 psia. @ 25° C. @ 25% RH
"D" mode accuracy and hysterisis (measured from mean, with standard calibration)
Acc:
+- 0.250 psia. ( +- 500 ft.) @ 25° C. @ 25% RH.
Hys:
+- 0.550 psia. ( +- 1,400 ft.) @ 25° C. @ 25% RH.
Physical characteristics (EDS unit only)
Width:
3.250" (82.55 mm.)
Height:
5.650" (143.51 mm.)
Depth A:
1.525" (38.73 mm.) main body.
Depth B:
1.900" (48.26 mm.) with switch protector and 3M® Dual Lock
Weight:
14.0 Oz. (0.374 kg.) Full Dress with battery
Height
Width
Depth
Front view
Top view
Switch
Protector
100 mm.
A B
Typical operating characteristic is 15
Resp/min. for a duration of one hour @
15,000 ft. @ 25° C. @ 25% RH.
External voltage must have less than 50
mv. p.p ripple from 0.025 Hz. to 2.5 KHz.
