87 & 89 Series IV
Service Manual
26
Table 5. Calibration Inputs (cont.)
Step Value Frequency Time to Settle (In Seconds)
AC A
1 5 A 700 Hz 7
2 5 A 700 Hz 7
DC A
1
5 A
DC
16
2
5 A
DC
7
1. Use 5520A 2-Wire Comp.
2. Zero ohms must use the same calibrator and test leads as all other ohm cal points.
Do not bypass the calibrator with a shorting bar for the zero ohms step.
3. Because of capacitive coupling, readings will be affected by movement of the leads or
operator. Put fingers on UP button and wait for display reading to settle before pushing.
Remote Interface
You can perform semi-automated calibration with the remote interface using MET/CAL
software. You must have a DB9 Adapter (Fluke P/N 804549) to operate the 87 & 89
Series IV meters with MET/CAL. This adapter allows you to connect the interface
adapter to a PC. The DB9 Adapter and an Adapter Kit (Fluke P/N 689486) are required if
you connect the UUT interface adapter to the 5520A serial port. For more information
about MET/CAL calibration requirements, contact Fluke customer service.
Temperature Calibration
Required equipment:
•
Fluke 87/89 IV Service Software, Fluke P/N 676152
•
Infrared (IR) Adapter, Fluke P/N 690518
•
IBM compatible PC
•
Fluke 80T-150U with accuracy certified to +0.2
°
C
•
Fluke 8060A Digital Multimeter
Optional equipment:
•
Holster, IR Adapter, Fluke P/N 666443
Note
The following procedure is only required if the Meter has been repaired by
replacing one of the following components: A/D, U4, Reference Junction
Sensor, U100 or EEPROM, U10.
Setup
Prior to beginning the procedure, turn the rotary switch
OFF
. Let the Meter stabilize in a
constant ambient temperature for 30 minutes. This allows the internal reference junction
sensor and input terminals to stabilize to the same temperature.
Connect the IR adapter to the serial com port of the PC. Install the 87/89 IV Service
Software.
