Autocal' Over - Datron 1062 Service Handbook

11
1.8
'AUTOCAL'
OVER THE BUS
All
the calibration
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 Calibration 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:
0;
dim DS[15]
1:
clr728
2:
wrt
728,"F3R3Q1W1="
3: O-^'S
4:
wrt
728,"G0="
define
15 character string
variable
send 'device clear'
to
DVM
(interface
7,
address 28)
program
to
DC
IV,
SRQ
Mode
1,
Enable
Cal.
program zero
cal.
trigger
5:
oni 7,"srq"
6: eir
7,128
7:
if
bit
("01XXXXXX'
,S)
=0;jmp
—1
8:
dsp
"Apply IV
&
CONTINUE"
9:
0-^S;stp
10:
wrt 728,
"G1="
11: oni
7,"srq"
12: eir
7,128
13:
if
bit
("01XXXXXX'
,S)
=0:jmp
—1
14; wrt
728,"T0W0="
15:
Id
728
16: stp
17:
"srq":rds(728)->S
18: red
728,
DS
19: iret
*7717
jump
to
SRQ
service
routine
on
interrupt
enable
SRQ
interrupts
from
interface 7
check
status
byte S
obtained by
service
routine
prompt
operator to
apply
calibration
source
on
com-
pleting
zero
cal
program
gain cal.
trigger
program
to
Internal Trigger,
Disable
Cal.
on completion
of gain
cal.
program
DVM
to
local
state
SRQ
service
routine to read
status
byte
CALIBRATION
EXAMPLE USING THE BUS
Step
Calibration
Operation
Calibration
Source
DVM
Setting
Bus
Controller
Instruction
DVM
Reading
After
Calibration
Remarks
1
Set
DVM
to
known
state
In
Remote
State
'Device Clear'
Program
DVM
to
predetermined state
A0C0DXE0F3M0N0
O0P0Q0R6S0T5
2
Set
DVM
to
DCV, IV
Range, and
prepare
for
calibration
-(-O.OOOOOV
Calibration
key
to
'CAL'
'F3R3Q1W1='
Program
DVM
to
Function:DC V(F3)
Range:1V (R3)
SRQ
Mode
1
(Q1)
Enable
Cal.
(W1)
3
IV Range
Zero
-^O.OOOOOV
In
Remote
State
'G0='
±.ooooov
Program
'Zero'
cal.,
SRQ
indicates
when
calibration
operation
completed
4
IV
Positive
Full
Range
-1-
1.00000V
In
Remote
State
'G1='
-(-1.00000V
Program 'Gain'
cal.,
SRQ
indicates
when
calibration
operation
completed
5 Set
DVM
to
Internal
Trigger,
Disable Cal.
In
Remote
State
'T0W0='
Program
DVM
to
Internal
Trigger
(T0),
Disable Cal.
(W0)
6 In
Local
State,
Calibration
key
to
'RUN'
'Local'
DVM
in
normal
mode,
free-running