Autocal'over - Datron 1061 Calibration And Servicing Handbook

11
1.8 'AUTOCAL'
OVER
THE BUS
All
the cal¡bration
procedures covered
in this
manual
can
be carried out remotely
using Option 50,
the
IEEE
Bus.
Effectively, the five
calibration keys are
replaced
by five
Bus instructions and
these are used
instead
of
the
'CALIBRATE' keys listed in
the
Calibratíon
tables
on
previous
pages.
An
example
of
calibration
with the
Bus
is given
in
the table below.
A
complete program listing
for the
same
calibration operation
assuming
an
HP9825
controller
is
as
follows:-
Ø: dirn DSt15l
1
:
clr 728
2:
wrl 728,"F3R3OlWl="
3:
Ø+S
4:
wrt
728,"GØ="
define
1
5
character
stríng
variable
send 'device
ciear'to
DVM
(interface
7, address
28)
program
to
DC
lV,
SRO
Mode
1, Enable Cal.
5:
oni 7,"srq"
6:
eir
7,128
7:
if bir
("ø1xxxxxx".s)
=@;jmp -1
8:
dsp
"Apply
1V
&
CONTINUE"
g:
0->S;stp
10: wrt 728,"G1="
1
1: oni 7,"srq"
12:
eir
7
,128
13: if bit ("ø1XXXXXX",S)
=@;jmp -1
14: wrt 728,"føWø="
15: lcl72B
i
6:
stp
17: "srq":rds(728)+S
jump to
SRO service
routine
on interrupt
enable SRQ interrupts
from
interface
7
check status byte
S
obtained by
service
routíne
prompt
operator to
aPPIY
calibration
source
on com-
pleting
zero
cal
program gain cal. trigger
program
to
lnternal Trigger,
Disable Cal. on
completion
of
gain cal.
program DVM to
local state
SRO service routíne
to
read
status byte
program
zero
cal.
trigger
18:
red 728,D$
19:
iret
*7717
CAL¡BRATION. EXAMPLE
USING
THE
BUS
Remarks
Program DVM
to
predetermined state
AøCøDXEøF3MøNø
oøPøoøR65øT5
Program DVM
to
Function:DC
V(F3l
Range:lV (R3)
SRO Mode
1
(O1)
Enable Cal.
(W1)
Program
'Zero'
cal.,
SRO indicates when
calibration operation
completed
Program
'Gain'cal.,
SRO indícates when
calibration operatíon
completed
Program DVM
to
lnternal Trigger
(T0),
Disable Cal. (WØ)
DVM
in
normal mode,
free-running
DVM
Reading
After
Calibration
È.00000v
+1.00000v
Bus
Controller
I
nstruction
'Device Clear'
'F3R301W1=',
,GøJ
'G1=',
'TØWØ='
'Local'
DVM
Setting
ln
Remote
State
Calibration
key
to'CAL'
ln
Remote
State
ln
Remote
State
ln
Remote
State
ln
Local State,
Calibration key
tO,RUN'
Calibration
Source
+0.00000v
+0.00000v
+1.00000v
Calibration
Operation
Set
DVM
to
known state
Set
DVM
to
DCV, 1V
Range,
and
prepare
for
calibration
1V
Range
Zero
1V Positive
Full
Range
Set
DVM
to
I
nte
rnal
Trigger,
Disable Cal.
Step
1
2
3
4
5
6
:i
;,
1-;':.