Eastern Energy 7721, Operation Manual

Page: 14 / 17

13
PC CONNECTION
The meter can link to PC for
data analysis
on-line
logging and via RS232
interface and software.
The protocol is as follows.
B. Format (
ASCII)
Model 7721/77231
Cxxxxppm:Txxx.xC(F) LRC CRLF
Description: $CO
2
:Air LRC CRLF
Model 7722/77232
Cxxxxppm:Txxx.xC(F):Hxx.x%:
dxxx.xC(F):wxxx.xC(F) LRC CRLF
Description: $CO
2
:Air:RH:DP:WBT LRC
CRLF
A. 9600 bps, 8 data bits, no parity.
SPECIFICATION
7721 7722 77231 77232
Resolution
Accuracy
Pressure
Dependence
Range
Resolution
Accuracy
Range N/A 0.0~99.9% N/A 0.0~99.9%
Resolution N/A 0.1% N/A 0.1%
±3%(10~90%) ±3%(10~90%)
±5%(others) ±5%(others)
Warm up
Operating
Storage
Power
±30ppm±5%rdg
(0~5000)
Not specified for out of scale
-10.0~60.0
℃
(14~140
℉
)
0.1
℃
/0.1
℉
+1.6% reading per kPa deviation from
normal pressure, 100kPa
Temp.
CO
2
Humidity
Range
1 ppm 1 ppm
0~2000ppm
2001~9999(out of scale)
0~5000ppm
5001~9999(out of scale)
±50ppm±5%rdg
(0~2000)
Not specified for out of scale
Accuracy
30 seconds
0~50
℃
, 0~95%RH (avoid condensation)
±0.6
℃
/ ±0.9
℉
-20~60 ℃ , 0~99%RH (avoid condensation)
12V adaptor
N/A N/A