Fluke 80T-150U User Manual

80T-150U-7001K Probe Kit

®

Installation and Calibration Instructions for the 80T-150U

Probe Installation for the 80T-150U

1. Remove the top cover from the 80T-150U temperature-to­voltage converter.

2. Note the location of the white, black, and bare cable leads
(see Figure 1).

Caution

Use professional soldering practices when
replacing the probe cable. Car eless soldering can
damage the pca and void the warranty.

3. Clip the cable tie, and unsolder the three cable leads from the
printed circuit assembly (pca).

4. Remove all remaining solder from the three plated t hru holes.

5. Firmly anchor the new cable assembl y to the pca using the
cable tie provided in the probe kit.

6. Insert the black, white, and bare wires into t heir respective
holes, and solder them to the pca.

7. Clip off the excess lead length on the bottom side of the pca.

8. Calibrate the temperature probe following t he instructions
given below.

Calibration for the 80T-150U

NOTE

Values given in brackets apply to the
performance test.

NOTE

Disregard the resist ors supplied with the
probe kit.

1. Access the interior of the 80T-150U by removing the bottom
case screw and separating the case halves.

2. Connect the 80T-150U to a DVM with 10 µV resol ution, and
select mV dc range.

3. Select the °C position of the switch. Immerse the probe tip
approximately two inches into a mercury thermometer­monitored 0°C bath, and allow 60 seconds for readings to
stabilize.

4. Adjust R3 (see Figure 1) t o obtain the following reading:

0 ± 0.05 mV dc [0 ± 2 mV dc]

5. Select the °F position of the switch, and adjust R2 to obtain
the following reading:

32.0 ± 0.1 mV dc [32.0 ± 4 mV dc]

6. Select the °C position, move the probe tip to a 70 °C to 90 °C
bath and allow the readings to stabilize.

7. Adjust R4 to obtain a DVM reading that agrees with the bath
temperature (BT) as monit ored by a mecury thermometer.

°C BT ± 0.05 mV dc [BT ± 2 mV dc]

8. Select the °F position, and verify that output is within ± 4 mV
dc of the bath thermometer reading. If nececssary, change t he
DVM range to obtain an on-scale reading.

9. Return the probe tip t o the 0 °C bath and check the output; if
readjustment is necessary, repeat steps 6 through 10 until the
readings can be obtained without adjestment.

10. Set the 80T-150U switch to the OFF position and remove the
80T-150U from the DVM.

11. Reassemble the 80T-150U

The 80T-150U is now calibrated.

Figure 1.

PN 433557 September 1976 Rev. 3, 4/02

1976, 1986, 2002 Fluke Corporation. All rights reserved. Printed in USA All product names are trademarks of their respective companies.

Black

White

80T-150U-4011