E N G L I S H
48
/* Parameters to bioscom function */
#define DATABIT7 0x02 /* Data bit */
#define DATABIT8 0x03
#define STOPBIT1 0x00 /* Stop bit */
#define STOPBIT2 0x04
#define NOPARITY 0x00 /* Parity bit */
#define ODDPARITY 0x08
#define EVENPARITY 0x18
#define BAUD1200 0x80 /* Baud rate */
#define BAUD2400 0xa0
#define BAUD4800 0xc0
#define BAUD9600 0xe0
/* 8259 PIC (Programmable Interrupt Controller) */
#define IMR 0x21 /* I/O address of 0CW1 (IMR) of 8529 PIC */
#define 0CW 0x20 /* I/O address of 0CW2 of 8259 PIC */
/* 0CW: Operation Command Word */
/* IMR: Interrupt Mask Register */
#define MASKON Oxe7 /* Mask IRQ3/IRQ4 on IMR */
#define MASKOFF Ox18 /* Mask IRQ3/IRQ4 off IMR */
#define EOI 0x20 /* Non-specific End of Interrupt command
0CW2 */
/* Interrupt Request Numbers */
#define IRQ0 0x08 /* Interrupt Vector for Timer */
#define IRQ3 0x0b /* Interrupt Vector for COM2 */
#define IRQ4 0x0c/* Interrupt Vector for COM1 */
#define IRQ8 0x70 /* Interrupt Vector for RTC (Real Time Clock) */
#define IRQ16 0x1c /* Interrupt Vector to called Timer */
#define IRQNUM (comport= =COM1) ? IRQ4 : IRQ3)
*/ Miscellaneous */
#define BUFSIZE 0x4000 /* Size of comm buffer
*/
#define BUFFEREMPTY (-1) /* Buffer empty */
#define ON 1
#define OFF 0
6. MAINTENANCE AND REPLACEABLE
PARTS
6.1 General maintenance
WARNINGS: REPAIRS OR SERVICING NOT
COVERED IN THIS MANUAL SHOULD ONLY
BE PERFORMED BY QUALIFIED PERSONNEL.
TO AVOID ELECTRICAL SHOCK, DO NOT
SERVICE UNLESS YOU ARE QUALIFIED TO
DO SO.
Periodically wipe the case with a damp
cloth and detergent; do not use abrasives
or solvents. Water, dirt, or contamination
in the A or mAìA input terminals may harm
this Meter.
Calibrate this Meter once a year to maintain
its performance specifications.
6.2 Battery replacement.
The Meter uses a 9V battery (NEDA 1604 or
IEC 6F22). To replace the battery, remove
the two screws of the battery compartment
from the back of the Meter and lift off the
cover of the compartment. Replace the
battery. Reattach the battery compartment
to the back of the Meter, and reinstall the
screw.
6.3 Fuse (s) test.
To test the internal fuses of this meter:
1. Set the rotary switch to the
“
” position.
2. Turn Meter on.
3. To test F2 (15A, 600V), insert a test lead
into the VΩHz CAP input terminal and
touch the probe to the A input terminal.
The display should read about 0.000V. If the
display reads
(overload), replace the
fuse and test again. If the display reads any
other value, have this Meter serviced.
4. To test F11 (1A, 600V), move the probe
from the A input terminal to the mAμA
input terminal.
The display should read about 1.2V. If the
display reads
(overload), replace the
fuse and test again, If the display reads any
other value, have this Meter serviced.
