Fluke_488

*** We will be closed June 21 - July 4 - Orders will ship July 5-6 ***

Fluke Products
Items For Sale #
Fluke LED Displays (3)
Fluke 8840A Meters (3)
HC700013P Clone (2)
Zilog Z8611/13 Clone (1)
Fluke Replacement PCB Rivets (1)
Items For FREE #
Fluke 8840A ROMs (3)
Fluke 8840AF ROMs (1)
Fluke 8842A ROMs (2)
Fluke HPIB/488 Card Info (1)
Fluke HPIB 488 Bus
HPIB HPIB HPIB

(UPDATE June 2022)

Fluke made many different versions of the 488 card over the 15 year production cycle. Some boards used a Z8611 4K MCU to provide the entire 488 function. Other later PCBs used a Z86E21F 8K MCU to interface to a uPD7210 LSI 488 bus controller. Sometimes this was a plastic OTP device, other times with a UV window. All PCBs with only one 40 pin DIP (Z8611 or Z8613) require a unique ROM for 8840A/AF and a different ROM for the 8842A. This is because the Fluke 8842A has an extended 20mv range, and it requires a different firmware set to access the extended range features.

All 488 PCBs that have 2-40 pin DIPs (Z86E21 & uPD7210) have enhanced firmware that detects which meter is is used in and operates accordingly.

The 488 bus command language is a rather simple set of 1, 2 or 3 character commands. In particular, the RANGE (Rx) and GET (Gx) commands are different in the 8840A & 8842A manuals.