Multimeter with Temperature

Calibration Information

WWarning
To avoid electrical shock, remove test leads and any input signals from the Meter before opening the case. Caution This Meter contains parts that can be damaged by static discharge. Follow the standard practices for handling static sensitive devices.

Introduction

The 16 Calibration Information instruction sheet provides the information necessary to calibrate and verify the Fluke Model 16 Multimeter with Temperature (hereafter known as the Meter). This instruction sheet provides the following information: Product specifications Disassembly and reassembly Performance test procedures Calibration procedures and adjustments Replacement parts See the instruction sheet for operating instructions.
To contact Fluke, call one of the following telephone numbers: USA and Canada: 1-888-99-FLUKE (1-888-993-5853) Europe: +31-402-678-200 Japan: +81-3-3434-0181 Singapore: +65-738-5655 Anywhere in the world: +1-425-356-5500 Or, visit Flukes Web stie at www.fluke.com.

Specifications

Specifications are in Table 1. Accuracy is specified for a period of one year after calibration, at 18C to 28C (64F to 82F) with relative humidity to 90%. AC conversions are accoupled, average responding, and calibrated to the rms value of a sine wave input.

Service

The Meter is warranted to be free from defects in material and workmanship for one year. The complete warranty statement is in the Meters instruction sheet.
Table 1. Specifications Maximum Voltage Between any Terminal and Earth Ground (excludes 10% tolerance) 600 V ac or dc Display Operating Temperature Storage Temperature Temperature Coefficient Relative Humidity Altitude Operation/Non-operation Battery Type Battery Life Shock, Vibration Size (HxWxL) Weight EMI Regulations Safety 3-3/4-digits, 4000 counts, updates 4/sec -10C to 50C -30C to 60C indefinitely (to -40C for 100 hrs) 0.1 x (specified accuracy)/C (<18C or >28C) 0% to 90% (-10C to 35C) 0% to 70% (35C to 50C) 2000 m 9V, NEDA 1604 or IEC 6Fcontinuous hours with alkaline 450 continuous hours with carbon-zinc 3 meter drops: Sinusoidal vibration up to 3 G @ 55 Hz 1.35 in x 2.75 in x 5.55 in (3.46 cm x 7.05 cm x 14.23 cm) 10 oz (286g) Complies with FCC Part 15B, Class B, EN50081-1, EN50082-1. Designed to Protection Class II requirement of UL1244, ANSI/ISA-S82.01 - 1988, CSA C22.2 No 231, and VDE 0411, and IEC 1010-1 overvoltage category III (CAT III), 600 V

Certification

PN 644226 July, 1997 Rev.1, 3/99 1997,1999 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies.
Accuracy specifications are given as follows: ([% of reading] + [number of least significant digits]). Table 1. Specifications (cont)
Function (50 to 400 Hz) Range 4000 mV 4.000 V 40.00 V 300.0 V 400.0 V 600.0 V
Resolution 1 mV 0.001 V 0.01 V 0.1 V 0.1 V 1V 1 mV 0.001 V 0.01 V 0.1 V 0.1 V 1V 0.1 0.001 k 0.01 k 0.1 k 0.001 M 0.01 M 0.001 F 0.01 F 0.1 F 1 F 10 F 0.1 A 0.1 A
Accuracy (1.9%+3) (1.9%+3) (1.9%+3) NA (1.9%+3) (1.9%+3) (0.9%+2) (0.9%+2) (0.9%+1) NA (0.9%+1) (0.9%+1) (0.9%+2) (0.9%+1) (0.9%+1) (0.9%+1) (0.9%+1) (1.5%+3) (1.9%+2) (1.9%+2) (1.9%+2) (1.9%+2) (10%+90) typical (1% + 2 counts) 2% + 3 counts) (1% + 0.8C) (1% + 1.5F) (5% + 1.5C) Typical (5% + 3.3F) Typical (0.9%+2)

4000 mV 4.000 V 40.00 V 300.0 V 400.0 V 600 V
400.0 4.000 k 40.00 k 400.0 k 4.000 M 40.00 M 1.000 F 10.00 F 100.0 F 1000 F 10000 F
(50 to 400 Hz) Temperature

0 to 200 A 0 to 200 A

-10C to 400C 14F to 75F -40C to -10C -40F to 14F 2.000 V

(Type K Thermocouple)

0.1C 0.2F 0.1C 0.2F 0.001 V

1. 2. 3.

The 4000 mV range can be entered only in the manual range mode. Use the 4000 mV range with accessories. The beeper is guaranteed to come on at <25 and turn off at >250. The Meter detects opens or shorts of 250 s or longer. Error does not include Type K Thermocouple errors.
Table 1. Specifications (cont)
Function Overload 1 Protection 600 V dc Input Impedance (Nominal) >5 M <100 pF Automatic Selection and LoZ = >2 k <200 pF 3 (ac coupled) >10 M <100 pF Automatic Selection and LoZ = >2 k 3 <200 pF Open Circuit Test Voltage
Common Mode Rejection Ratio 2 (1 k Unbalanced) >60 dB at dc 50 Hz or 60 Hz

Normal Mode 2 Rejection

600 V dc
>100 dB at dc, 50 Hz or 60 Hz
>50 dB at 50 Hz or 60 Hz
Full Scale Voltage To 4.0 M 40 M <450 mV dc <1.5 V dc
Short Circuit Current <500 A 0.95 mA (typical) Normal Mode Rejection >50 dB @ 50 Hz or 60 Hz.

J L2 [ \

600 V dc 600 V dc
<1.5 V dc 2.4-3.0 V dc Burden Voltage
2.400 V dc Common Mode Rejection Ratio >100 dB @ dc 50 Hz or 60 Hz >60 dB at dc, 50 Hz or 60 Hz
600 V rms or dc 600 V rms or dc

<5 mV/A <5 mV/A

3 x 106 V Hz maximum. ~2 k input impedance up to 50 V. Impedance increases with input voltage to >300 k at 600 V.
MIN MAX Recording Accuracy and Response Time Specified accuracy of the measurement function 12 digits in dc for changes >200 ms in duration (40 digits in ac). Typical 100 ms response to 80%. Example 1: this would mean 1.2 when recording temperature. Example 2: This would mean 12 A when recording A or 12 A if used with a dc amp probe. MIN MAX Recording with Elapsed Time Elapsed Time: 0 to 100 hours (99.59) Resolution: 1 minute Accuracy: 0.3% typical Continuity Capture Detects opens or shorts of 250 s or longer.
Disassembly and Reassembly
Referring to Figure 1, disassemble the Meter as follows. A Phillips-head screwdriver and small flat-blade screwdriver are required. 1. 2. 3. 4. Remove the test leads and set the rotary knob to OFF. Remove the Phillips-head screws from the case bottom. Separate the case top from the case bottom. To replace the battery: lift the battery from the case bottom and insert a new 9V battery. Be sure the positive and negative battery posts are oriented correctly. To remove the pca: insert a small, flat-blade screwdriver between the edge of the case top and the pca where shown in Figure 2. Gently unsnap a side of the case top from the pca. Repeat on the other side of the pca. Unsnap the case from the top of the pca last. Lift the pca from the case top by its edges. If the elastomeric contact strips for the switch assembly and LCD are stuck to the pca, remove them without touching the conductive edges.

Cleaning

W Warning
To avoid electrical shock, remove test leads and any input signals before cleaning. To clean the case, wipe it with a cloth lightly dampened with water and a mild detergent. Do not use abrasives, solvents, or alcohol.
Recommended Test Equipment
A list of recommended equipment for the performance test and calibration adjustment procedure is shown in Table 2.
Table 2. Recommended Equipment Equipment AC/DC Calibrator Minimum Specification DC Voltage: 0 to 600 V Accuracy: 0.25% AC Voltage: 0 to 600 V Accuracy: 0.5% Frequency: 50 to 400 Hz Resistance: 1.0 to 40 M Accuracy: 0.25% Capacitance: 0 to 1.000 F Accuracy: 0.5% --Accuracy: Certified to 0.2C ambient 0.02C resolution 0.05F resolution --Recommended Model 5700A, or 5500A
Note Before reinserting the pca, make sure that the rotary knob is in the OFF position.
7. To reinsert the pca: Place the pca over the four screw posts in the case top, then press gently on the center of the pca while using the small flat-edge screwdriver to shoehorn the pca under the snap on a side of the case top. Repeat on the other side and the top. To remove the switch support, use a small, flat-blade screwdriver to gently unsnap the sides and top of the switch support from the snaps shown in Figure 2. The LCD, switch assembly, and elastomeric contact strips for the LCD and switch assembly are accessible and can be replaced as needed. Do not allow the LCD to get wet. Before installing a new LCD, make sure that all connector contact points are clean. Caution Do not touch the conductive edges of the elastomeric strips or the contacts on the switch assembly. If they are contaminated, clean them with isopropyl alcohol. 9. Reassembling the Meter is the reverse of disassembling it. After the Meter is reassembled, execute the Performance Test to confirm that the Meter is working properly.

Decade Resistor

Fluke 5500A
Decade Capacitor Thermocouple Wire K-Type Temperature Probe Mercury Thermometer
Fluke 80 PK-1 Fluke 80T-150U Princo Model ASTM 56C Princo Model ASTM 56F Dewar Flask

Flask with cap

Decal Case, Top LCD
Conn. Elastomeric Conn. Elastomeric LCD to PCA Switch Assembly Actuator, Switch Support, Switch Assembly

Battery

Shock Absorber Main PCA Case, Bottom

Shield, Bottom

Screw, THD Form, PH.P.STL, 5-14 x.750

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Figure 1. Model 16 Disassembled Unit

Snap Snaps

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Figure 2. Removing and Reinserting the Printed Circuit Assembly

Performance Test

To avoid electric shock, do not execute the performance tests procedures unless the Meter is fully assembled. To ensure that the Meter is working properly and performs to specifications, use the following procedures. If the Meter fails this test, it needs calibration adjustment or repair.
Set the 5700A using the input voltage shown in Table 4. The reading on the display should be within the values shown in Table 4. Repeat step 3 to verify that the ice bath temperature is at 0.0C 0.3C.

Calibration Adjustments

Perform the following calibration adjustment procedures if the Meter fails the performance test.

Multimeter

Note The following performance test is for all functions except for temperature. Temperature performance test follows this procedure.
1. 2. Referring to Table 3, put the Meter in the function and range shown for Test 1. Apply the input from the appropriate source to the [+] and COM jacks on the Meter. The reading on the display should be within the MINIMUM and MAXIMUM values shown in Table 3. Test the remaining functions and ranges. Repeat steps 1 and 2 for test numbers 2 through 41.

Initial Steps

1. 2. Remove any input signals to the Meter. Remove the four screws on the back and separate the case bottom and case top. Notice that when you do so the battery remains in the case top and power to the Meter is disconnected.
Note To avoid stretching or bending the battery contacts, connect leads to the base of the contacts as shown in Figure 4.
3. Observing correct polarity, connect a 9 V battery to the battery contacts using easy hook jumpers or alligator clip leads (see Figure 4).

Temperature

Note The performance test for the other functions must be done before this test is done.
1. 2. Connect the equipment as shown in Figure 3. Insert a mercury thermometer to the same depth as the thermocouple wire to verify that the ice bath temperature is 0.0C. Short (or apply 0.0 mV) to the copper wires at the 5700A Calibrator. Verify that the Meter reads 0.0C 0.8C. If this test fails, reposition the thermocouple wires and mercury thermometer in the ice bath and repeat steps 3 and 4. If the Meter continues to fail, use steps 6 through 8 to verify the temperature performance tests. Remove the short applied in step 3.
Note The following calibration adjustment procedure is for all functions except for temperature. Temperature calibration adjustment follows this procedure.

1. 2. 3. Set the calibrator for 0 V dc. Put the Meter in the 4.000 V dc range. Connect the calibrator to the [+] and COM jacks on the Meter. Apply an input of +4.000 V dc 0.25% The Meter display should read between 3.997-4.003 V. If it does not, adjust R4 as described in step 4 (see Figure 4). 4. 5. Adjust R4 (see Figure 4) so that the Meter display reads between 3.997 and 4.003 V. Proceed to adjust the Temperature function.

3. 4. 5.

Table 3. Performance Tests Test No. Meter Range Input To Meter Switch Position Display Minimum Display Maximum

2. 3. 4.

0.003 0.000 Center 0V 4.000 V ac 1 0.040 0.000 Center 0V 4.000 V ac, MIN MAX 2 0.013 0.007 Center 10 mV, 50 Hz 4.000 V ac 3 0.013 0.007 Center 10 mV, 400 Hz 4.000 V ac 4 3.570 3.430 Right 3.5 V, 50 Hz 4.000 V ac 5 3.570 3.430 Center 3.5 V, 400 Hz 4.000 V ac 6 35.70 34.30 Center 35 V, 50 Hz 40.00 V ac 7 35.70 34.30 Right 35 V, 400 Hz 40.00 V ac 8 357.0 343.0 Right 350 V, 80 Hz 400.0 V ac 586 Center 600 V, 400 Hz 600 V ac 10 -0.012 0.4.000 V dc, MIN MAX 0V Center 4.000 V dc 0V Center -0.002 0.13 40.00 V dc +20 mV dc Center 00.01 00.03 Center -000.3 -000.400.0 V dc -200 mV dc 15 4.000 V dc +3.5 V Center +3.466 +3.534 -35.33 -34.40.00 V dc -35 V dc Center 400.0 V dc +100 V dc Center +99.0 +101.Center -606 -600 V dc -600 V dc 0.2 Right -0.A dc 0.0 A, dc 19 9.7 10.3 10.0 A, dc Right A dc -10.3 -9.7 -10.0 A, dc Right A dc 202.2 Right 197.A dc 200.0 A, dc 22 -197.8 Right -202.A dc -200.0 A, dc 23 41.1 Right 38.A ac 40.0 A, 50 Hz 24 38.9 41.1 40.0 A, 400 Hz Right A ac 195.7 204.3 200.0 A, 50 Hz Right A ac 195.7 204.3 200.0 A, 400 Hz Right A ac 1.980 +2 V dc2 Right 2.Continuity 3.3973 Right 3.Continuity, Automatic Selection +3.43 V dc2 Right Continuity, Automatic Selection 302 -0.5 V dc2 -0.5073 -0.4933 Right 400.0.0 0.0 0.2 Right 400.1.0 0.8 1.2 Right 400.350.0 346.6 353.4 Right 4.000 k 34 1.0 k 0.990 1.010 Right 40.00 k k 34.67 35.33 Right 400.0 k k 99.0 101.0 Right 4.000 M 37 2.9 M 2.873 2.927 Right 40.00 M M 34.44 35.56 Right , Automatic Selection 39 1.96 V dc 1.9403 1.9803 Right 1.000 F 404 0.0 F -0.001 F 0.001 F Right 1.000 F 0.95 F 0.930 F 0.970 F 414 In the Automatic Selection mode, the Meter uses a low-impedance thermistor (~2.5k for circuit protection and load testing (referred to as low-Z input circuitry). When using the 5100B, 5500A, or 5700A to drive the Meter with high voltages, avoid an overload/current limit condition by gradually stepping the voltage up (waiting two seconds between each step) from 90.0 V, 120.0 V, 180.0 V, and 350.0 V at 80 Hz each step. Calibrator 50 divider override. The dc volts annunciator must be on. Conducting performance tests of the 400 , 4 k, 40 k, and 1 F ranges (tests no. 22, 23, 24, 25, 26, 31, and 32) verifies that the discrete and integrated circuitry needed to support the other capacitance ranges are working within specifications. Therefore, the tests indirectly verify that the Meter will meet specification in the 10 F, 100 F, 1000 F, and 10,000 F ranges.

Table 4. Temperature Performance Tests
Input Voltage 0.0 0.919 mV 4.095 mV C 0.0 0.8 23.0 1.0 100.0 1.8 Display Readings F 32.0 1.5 73.4 2.2 212.0 3.6

AK-80 5700A

Yellow Copper

Ice Bath

Banana Plug

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Figure 3. Performance Test for Temperature

Clip to Base Contacts

Input Receptacles Adjust R4 for 3.997-4.003V DC

9V BATTERY

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Figure 4. Calibration Adjustment for DC Voltage
Note Adjust DC voltage (R4) before adjusting temperature (R38).
The following describes three temperature calibration procedures: Calibrating at room temperature. Use this procedure if it is not necessary to optimize the Meters performance. Calibrating in an ice bath. Use this procedure to optimize the Meters performance at around 0.0C. Calibrating in a lag bath. Use this procedure to optimize the Meters performance at room temperature.
Connect the other end of the thermocouple wire to the Meter using a Fluke 80AK Adapter Plug (see Figure 6). Allow the instrument reading to settle. Adjust R38 so that the Meter display has the same reading of the ice bath temperature.

Lag Bath Calibration

The following adjustment optimizes the Meters performance at room temperature using a specific thermocouple. 1. 2. 3. Put the Meter in the temperature function and C mode. Insert a thermocouple in a lag bath (see Figure 6). Insert a mercury thermometer to the same depth as the thermocouple wire to verify that the lag bath temperature is at room temperature Connect the other end of the thermocouple wire to the Meter using an 80AK Adapter Plug(see Figure 6). Allow the instrument reading to settle. Adjust R38 so that the Meter display has the same reading of the lag bath thermometer.
Room Temperature Calibration
The following procedure allows you to make the calibration adjustment at room temperature. 1. 2. 3. 4. Allow the Meter to stabilize at room temperature. After the temperature stabilizes, do not touch the COM jack. Turn to temperature function and C mode. Observing the correct polarity, connect a copper short across the input jacks of the Meter (see Figure 5). Using a temperature probe with the appropriate Meter (Fluke 45 or equivalent), measure the temperature of the COM input jack (see Figure 5). Be sure to place the probe on the COM closest to the pca. Adjust R38 so the Meter display is the same as the temperature probe reading.

Replacement Parts

Replacement parts are listed in Table 4 and shown in Figure 1. Table 4. Replacement Parts
Parts Window decal Case, top LCD Connection elastomeric Connection Elastomeric LCD to PCA Switch assembly Actuator, Switch Support, Switch Assembly Battery Case, Bottom assembly Screw, THD Form, PH.P.STL, 5014 x.750 Foot Part No. 832246 885884

Ice Bath Calibration

The following procedure optimizes the Meters performance near 0C (32F) using a specific thermocouple. 1. 2. 3. Put the Meter in the temperature function and C mode. Insert a thermocouple in an ice bath (see Figure 6). Insert a mercury thermometer to the same depth as the thermocouple wire to verify that the ice bath temperature is 0.0C.

1000V 750V MAX

DUAL DISPLAY MULTIMETER

! 100 mA

REL dB

CAL ENABLE

500mA F 250V ALL INPUTS 1kV MAX

V A FREQ AUTO COMP HI LO

THRESH POWER

80T-150U

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Figure 5. Calibration Adjustment for Temperature Using the 80T-150U

Thermometer

Ice or Lag Bath Clip to Base Contacts

80AK +

R38 Thermocouple

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Figure 6. Calibration Adjustment for Temperature Using an Ice or Lag Bath