Manual

13
PC CONNECTION
The meter can do PC link 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: $CO2:Air LRC CRLF
Model 7722/77232
Cxxxxppm:Txxx.xC(F):Hxx.x%:
dxxx.xC(F):wxxx.xC(F) LRC CRLF
Description: $CO :Air:RH:DP:WBT LRC
2
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.
CO2
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