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Strip Chart Program
6.13 STRIP CHART EXAMPLE
Let's look at a practical application of the strip chart program. Suppose you want to monitor the
temperature of a photographic darkroom, and of a controlled-temperature bath within that darkroom,
using two type T thermocouples. Assume that the room-temperature thermocouple is connected to
channel 3 of the HP 3421A Data Acquisition/Control Unit, and the bath-temperature thermocouple is
connected to channel 4. The HP-71 1s connected to the HP 3421A and an HP 222 5B ThinkJet Printer, as
shown in figure 6-1:
BATH
TEMP
L
CONTROLLED TEMPERATURE BATH
?
@
THINKJET
ROOM
TEMP
I
]
J
4 {
7
—
1]
90
00
HP-71
HP3421
Figure 6-1. Temperature Recording System
Once all of the components are connected, the procedure is as follows:
ELUM =TEIF
[ENDLINE
Run the strip chart program.
Reading the HFZ421...
The program reads the internal configuration of the
HP 3421A.
Ecit
File Fun Oait?
The main menu appears. Press
to select the file menu.
Get
Hew Save Ver Main™
Press
to start a new setup.
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