Keypad Test; Verification Of The Ir Communication Port; Testing Temperature - Fluke 87 IV Series Service Manual

87 & 89 Series IV
Service Manual

Keypad Test

To test the keypad, turn the Meter to AC V and push each button separately. Each button
push should cause the Meter to beep.
Reset the Meter by turning it

Verification of the IR Communication Port

If you are using MET/CAL to do performance testing, it is not necessary to
perform this verification test.
1. Connect the Infrared (IR) adapter to the com port of a PC.
2. Align the Meter IR port with the IR adapter window. Turn the Meter rotary switch to
3. Install Fluke 87/89 IV Service Software, P/N 676152.
4. Apply 1 V dc to the
5. The display reading should appear in text box of PC.
If the PC indicates that the Meter is not connected, ensure that the com port
is correct and that the IR adapter is aligned with the IR window.

Testing Temperature

Connect K-type thermocouple and Fluke 80Ak to the temperature input on the Meter.
Connect the other end to the 5520A TC output. Allow connections to stabilize for 30
seconds before proceeding.
1. Turn the rotary switch to the temperature function.
2. Set the 5520A for K-type thermocouple and an output of 23 °C.
3. Enter the Meter Setup mode (press yellow button, then backlight button).
4. Adjust the temperature offset until the temperature on the Meter primary display
5. Enter an offset value by pressing the yellow button, then the backlight button.
6. Exit Setup mode by pressing the yellow button, then the
7. Perform the steps in Table 3.
18
DC V.
matches the 5520A output temperature (23 °C). Use the blue shift button and
backlight button to advance digit. Use the up and down arrow keys to edit digit.
Table 3. Temperature Test Input and Display
Input
-10.0 °C
0.0 °C
350.0 °C
, and then back .
Off On
Note
input terminal.
Note
Display
Lower Limit Upper Limit
-11.1 °C -8.9 °C
-1.0 °C
345.0 °C 355.0 °C
CANCEL button.
1.0 °C