Bird Technologies 6091P Manuale d'uso
Pagina 58
Sending Device
Dependent
Commands
The controller sends commands over the bus to control the Calorimeter. More than
one command can be grouped together and sent at the same time. the following ex-
amples demonstrate how to send device dependent commands. The first set of exam-
ples sends the Watts command to the Calorimeter. The second example sends the
Watts command and also turns off prefixes and sets the trigger to continuous on
Talk.
Receiving Data
Measurement results are returned to the controller in a 16-bit ASCII character
string. The following demonstrate how to enter the measurement data and shows the
content and format of the character string. Measurement data is entered into string
variables, RD$.
Bird Model 6091 Calorimeter
46
National GPIB-PCII
HP 200/300
LET CMD$="WA"
OUTPUT 724;"WA"
CALL IBWRT (UD%,CMD$)
or
LET CMD$="WAPNT0"
OUTPUT 724;
CALL IBWRT (UD%,CMD$)
"WAPNT0"
1
2
3
4
5
6
7
8
9
10
11 12
13
14
15
16
N
W
A
Sp Sp
1
0
2
.
5
5
W
Sp
Sp
CR
LF
Terminators (CR or CR, LF)
Units (W,C, l/m)
Numeric Data
Space or "-" Sign
Space
Measurement Command
(WA, FL, IN, OU, DT)
Stable Read Indicator
(N - Normal, T- Transient)
National GPIB-PCII
HP 200/300
140 RD$=SPACE$(16)
90 ENTER 724;RD$
150 CALL IBRD (UD%,RD$)