Fluke 707 Use and care manual

November 2001, Rev.1, 9/2019
© 2001-2019 Fluke Corporation, All rights reserved.
All product names are trademarks of their respective companies. 1
Model 707
Loop Calibrator
Calibration Information
W�Warning
To prevent electrical shock, remove test leads and any input signals from the
Model 707 Loop Calibrator before opening the case.
WCaution
The Model 707 Loop Calibrator contains parts that can be damaged by static
discharge. Follow the standard practices for handling static sensitive
devices.
Introduction
The Calibration Information for the Model 707 Loop
Calibrator (hereafter referred to as the Loop
Calibrator) provides the information necessary to
verify the performance and adjust the calibration of
the Loop Calibrator.
This document includes the following:
•Contacting Fluke for service
•Specifications
•Cleaning
•Replacing the battery
•Disassembly and reassembly
•Recommended test equipment
•Performance verification procedures
•Calibration adjustments
•User-replaceable parts
The complete operating instructions and warranty
statement for the Model 707 Loop Calibrator are
provided in the Instruction Sheet that came with it.
Contacting Fluke for Service
This Fluke product will be free from defects in
material and workmanship for three years from the
date of purchase.
To contact Fluke, call one of the following telephone
numbers:
Technical Support USA: 1-800-44-FLUKE (1-800-443-5853)
Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: [phone]
Japan: [phone]
Singapore: [phone]
China: [phone]
Brazil: [phone]
Anywhere in the world: [phone]
Or, visit Fluke's website at www.fluke.com.
To register your product, visit http://register.fluke.com.
To view, print, or download the latest manual supplement,
visit http://us.fluke.com/usen/support/manuals.
Address correspondence to:
Fluke Corporation Fluke Europe B.V.
P.O. Box 9090, P.O. Box 1186,
Everett, WA 98206-9090 5602 BD Eindhoven
U.S.A. The Netherland

Fluke 707
Calibration Information
2
Specifications
Product specifications are provided in Tables 1 and 2. These specifications are based on a 1-year calibration cycle
and apply from 18 ºC to 28 ºC (64 ºF to 82 ºF) unless stated otherwise. Accuracy specifications are given as
follows:
± ( [ % of reading ] + [ number of least significant digits ] ).
Table 1. General Specifications
Maximum voltage between any
terminal and earth ground or
between any two terminals
30 V
Display: 0 to 28 V with 0.001 V resolution, 0 to 24 mA with 0.001 mA resolution
Operating Temperature: -10 °C to 55 °C
Storage Temperature: -30 °C to 60 °C
Temperature Coefficient: ±0.005 % of range per °C for -10 °C to 18 °C and 28 °C to 55 °C
Relative Humidity: 95 % to 30 °C,
75 % to 40 °C,
45 % up to 50 °C,
35 % up to 55 °C
Operating Altitude: 3000 meters maximum
Power Requirements: Single 9 V battery (IEC 6LR61)
Battery Life (Typical): Source Mode: 18 hours; 12 mA into 500 Ω
Measure / Simulate Mode: 50 hours
Size (H x W x L):
With Holster:
50.80 mm x 69.85 mm x 142.87 mm (2.00 in x 2.75 in x 5.625 in)
54.61 mm x 76.20 mm x 158.75 (2.15 in x 3.00 in x 6.25 in)
Weight: 349 g (12.3 oz). With Holster and flex-stand: 601 g (21.2 oz)
Safety:
IEC 61010-1: Pollution degree 2
IEC 61010-2-030: CAT O 30 V
Table 2. Accuracy Specifications
Function Range Resolution
Accuracy
(% of reading + counts)
DC Volts Input
+ 28 V (+30 V max) 0.001 V ± (0.015 % + 2 counts)
DC mA Input 20 mA (24 mA max) 0.001 mA ± (0.015 % + 2 counts)
DC mA Output 0 mA to 24 mA 0.001 mA ± (0.015 % + 2 counts)
Source mode: Compliance: ≥1200 Ωat 20 mA, ≥950 Ωat 20 mA in HartMode
Simulate mode: External loop voltage requirements: 24 V nominal, 28 V maximum, 12 V minimum
Loop Power ≥24 V
Percent display
- 25 % to 125 % (4 to 20 mA mode)
Input/Output protection Fuseless protection.

Loop Calibrator
Cleaning
3
Cleaning
WWarning
To prevent electrical shock, remove test
leads and 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.
Replacing the Battery
WWarning
To avoid false readings, which could lead
to possible electric shock or personal
injury, replace the battery as soon as the
low battery symbol ( M) appears on the
Loop Calibrator’s display.
To replace the battery:
1. Lift and remove the battery cover to gain access
to the battery compartment. See Figure 1.
2. Lift the battery from the case bottom and insert a
new 9 V battery.
3. Make sure the positive and negative battery posts
are oriented correctly, as noted in the bottom of
the battery compartment.
AAK07F.emf
Figure 1. Replacing the Battery
Disassembling and Reassembling the
Calibrator
WWarning
To prevent electric shock or personal
injury:
•Do not allow water into the case.
•Remove any input signals prior to
removing test leads and opening case.
•When servicing the Loop Calibrator,
use only specified replacement parts.
To disassemble and reassemble the Loop Calibrator,
refer to Figures 2 and 3 as necessary and perform the
following procedure.
Note
Both a Phillips-head screwdriver and a flat-
blade screwdriver are required.
Removing the Printed Circuit Assembly (PCA)
1. Make sure the Loop Calibrator is off.
2. Remove all test leads from the terminals of the
Loop Calibrator.
3. Gently pry the rotary knob off with a small flat-
blade screwdriver.
4. Lift and remove the battery cover to gain access
to the battery compartment and 2 case screws
inside. Remove the battery.
5. Remove all Phillips-head screws from the case
bottom.
6. Separate the case top from the case bottom.
Verify that the battery terminals are being guided
through the bottom case before completely
removing the case bottom.
7. Referring to Figure 3, insert a small, flat-blade
screwdriver between the edge of the case top and
the PCA. Gently unsnap the case top from the
PCA.
8. Repeat step 7 for each of the remaining snaps that
secure the PCA to the case top.
9. Lift the PCA from the case top by its edges.
10. If the elastomeric strips for the keypad assembly
and LCD are stuck to the PCA, remove them, but
do not touch the conductive edges.

Fluke 707
Calibration Information
4
Case, Top
Keypad Assembly
Main PCA
Foot
LCD
Elastomeric Strip
(Keypad to PCA)
Elastomeric Strip
(LCD to PCA)
Switch Support Assembly
Case, Bottom
Battery Door
Battery
Screw, THD Form, PH.P.STL,
5-14 x .750
adi10F.emf
Figure 2. Disassembled Loop Calibrator

Loop Calibrator
Disassembling and Reassembling the Calibrator
5
Removing the Switch Support
Lift the switch support out of the top case.
The LCD, keypad assembly, and elastomeric strips
are now 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.
WCaution
Do not touch the conductive edges of the
elastomeric strips or the contacts on the
keypad assembly. If they are
contaminated, clean them with isopropyl
alcohol.
Reinserting the PCA
1. Place the PCA over the four screw posts in the
case top.
2. Gently press on the center of the PCA while
using the small flat-edge screwdriver to insert the
PCA under the snap on a side of the case top.
Repeat on the other side and the top.
Reassembling the Loop Calibrator
Reassembling the Calibrator is the reverse of
disassembling it.
After the Calibrator is reassembled, perform the
verification test to confirm that the Loop Calibrator is
working properly.
1
2
3
Snap
Snap
Snaps
adi02F.emf
Figure 3. Removing and Reinserting the Printed Circuit Assembly (PCA)

Fluke 707
Calibration Information
6
Recommended Test Equipment
A list of recommended equipment for the
performance verification tests and calibration
adjustment procedure is shown in Table 3.
Performance Verification
WWarning
To prevent electric shock, do not perform
the verification tests unless the Loop
Calibrator is fully assembled.
Perform the following tests to check the accuracy of
each of the Loop Calibrator’s functions against its
specifications.
If the Loop Calibrator fails any of these tests,
calibration adjustment or repair is required.
Performance Verification Procedures
DC Current Source Mode
Test 1:
1. Turn the Loop Calibrator on.
After the P.S. power timeout displays, the Loop
Calibrator should display 4.000 mA. If it is
displaying 0.000 mA, turn the Loop Calibrator
off. Hold down while turning the Loop
Calibrator on. Continue to hold for 2 seconds.
When the timeout display ends, the Loop
Calibrator should display 4.000 mA.
2. Connect the Loop Calibrator’s [+] terminal to the
HP 3458A I input, and the COM terminal to the
HP 3458A LO input.
3. Verify that the Loop Calibrator's display shows
SOURCE in the upper-left corner.
4. Set the HP 3458A to measure DC Amps (DCI).
5. Refer to Table 4 to verify the readings on the HP
3458A for the following tests. (No adjustment is
necessary for test 1.)
Test 2:
1. Press twice to select 12.000 mA.
2. Verify the readings.
Test 3:
1. Press twice to select 20.000 mA.
2. Press and rotate the knob until 24.000 mA is
displayed.
3. Verify the readings.
DC Current Measurement Mode
Test 4:
1. Press the key twice to put the Loop Calibrator
into the mA measurement mode.
The Loop Calibrator’s display should show
MEASURE in the top right corner.
2. Disconnect the HP 3458A from the Loop
Calibrator.
3. Connect the test leads from the red AUX terminal
of the Fluke 5520A to the HP 3458A Iinput.
4. Connect a test lead from the black AUX terminal
of the Fluke 5520A to the COM terminal on the
Loop Calibrator.
5. Connect a test lead from the HP 3458A LO input
to the Loop Calibrator's +terminal.
6. Adjust the Fluke 5520A to output the value of
test 4 in Table 2 as measured by the HP 3458A.
7. Adjust the Fluke 5520A if necessary, the reading
on the HP 3458A is the same as the value for the
5520A in steps 4-6 in Table 4.
8. Verify the display readings on the Loop
Calibrator.
Table 3. Recommended Equipment
Equipment Recommended Model or Equivalent
DC Calibrator DC Voltage: 0 to 30 V
Accuracy: ±0.004 % +0.5 mV
DC Current: 0 to 24 mA
Accuracy: ±0.004% +0.5 µA
Fluke 5520A Multi-Product Calibrator
Digital Multimeter DC Current: 0 to 26 mA
Accuracy: ±0.004% +0.5 µA
HP 3458A
Flexible Test Leads
Fluke TL24

Loop Calibrator
Calibration Adjustment
7
Table 4. DC Current Source / Current Measure / Voltage Measure Mode Tests
Test No. 707 Loop Calibrator Output Mode HP 3458A Minimum HP 3458A Maximum
1
2
3
4.000 mA
12.000 mA
24.000 mA
mA Source
mA Source
mA Source
3.9974 mA
11.9962 mA
23.9944 mA
4.0026 mA
12.0038 mA
24.0056 mA
Test No. 5520A Calibrator Output Mode Fluke 707 Minimum Fluke 707 Maximum
4
5
6
4.000 mA
12.000 mA
24.000 mA
mA Measure
mA Measure
mA Measure
3.997 mA
11.996 mA
23.994 mA
4.003 mA
12.004 mA
24.006 mA
Test No. 5500A Calibrator Output Mode Fluke 707 Minimum Fluke 707 Maximum
7
8
9
0.000 V
14.000 V
28.000 V
Volt Measure
Volt Measure
Volt Measure
-0.002 V
13.996 V
27.994 V
0.002 V
14.004 V
28.006 V
DC Voltage Measurement Mode
1. Press twice to get the Loop Calibrator to
V MEASURE. The Loop Calibrator’s display
should read "V".
2. Connect the test leads from the NORMAL output
terminals of the Fluke 5520A to the input
terminals on the Loop Calibrator (black to COM
and red to [+] ).
3. Set the Fluke 5520A to test 7 in Table 4 and
verify the display reading on the Loop Calibrator.
4. Repeat for tests 8 and 9.
The reading on the display should be within the
minimum and maximum values shown in
Table 4.
5. Set the 5520A output to 0 V (zero), and set output
to STANDBY.
6. Turn the Loop Calibrator OFF and disconnect the
Loop Calibrator from the 5520A.
The performance verification tests are now
complete.
If the Loop Calibrator failed any of these tests,
calibration adjustment or repair is required.
Calibration Adjustment
Perform the following calibration adjustment
procedures if the Loop Calibrator fails the
performance verification test.
Calibration Adjustment Counter
The Loop Calibrator contains a calibration
adjustment counter. The value in the calibration
adjustment counter can be recorded and used to show
that no adjustments have been made during a
calibration cycle. When Fluke performs the
calibration, the value of the calibration adjustment
counter will be recorded on the calibration label.
To find the value in the calibration adjustment
counter, hold down while turning the unit on. The
software revision will display for 2 seconds followed
by the calibration counter for another 2 seconds.
Note
Make sure that the Loop Calibrator has a
new battery before starting the calibration
procedure. Calibration will not function
properly if the low battery indicator (M)is
on.
Because the Loop Calibrator incorporates several key
hold start up features, entering the Adjust mode
through the keypad requires an exact key hold
sequence:
1. With the Loop Calibrator off, hold down 
and and turn the Loop Calibrator on.
"CAL"appears on the main display and the
calibration adjustment counter is displayed on the
secondary display. If the knob is not turned
within 2 seconds, the unit returns to the normal
operation mode.

Fluke 707
Calibration Information
8
2. The Loop Calibrator adjustment procedure is
password protected. At this point, a password is
needed to go forward. "PAS" is displayed on the
main display and "000" on the secondary display.
Enter the password "626" as follows:
1. Rotate the knob to add a 6 in the LCD of
the secondary display, push and release
the knob.
2. Rotate the knob to get 2 into the LCD,
push and release.
3. Rotate the knob to get a 6, push and
release.
If the password is correct, you'll be led through
all the adjust modes (source, mA read, V read),
otherwise the unit returns to normal operation. In
the adjust mode, the main display will show
"1.000 mA".
3. Connect the Loop Calibrator [+] terminal to the
HP 3458A I input, and the COMterminal to the
HP 3458A LO input. The Loop Calibrator will be
in mA source cal and "1.000 mA" is displayed. On
the secondary LCD, the last 3 digits from the
knob value are shown. Adjust the mA output by
tuning the knob until "1.000 mA" shows on the HP
3458A.
4. Press , "22.000 mA" is displayed. Adjust the
mA output by turning the knob until "22.000 mA"
is shown on the HP 3458A.
5. Press to go to mA measure adjust.
6. Disconnect the HP 3458A from the Loop
Calibrator.
7. Connect the test leads from the AUX terminals of
the Fluke 5520A to the terminals on the Loop
Calibrator (black to COM and red to [+]).
8. The Loop Calibrator will display "MEASURE" and
0.000 mA is displayed. On the secondary display,
the last 3 digits of the A/D reading are shown. Set
the 5520A to output 0.000 mA into the Loop
Calibrator. Press .
9. After a moment, the Loop Calibrator will display
24.000 mA. Set the 5520A to output 24.000 mA
into the Loop Calibrator.
10. Press to go to V measure adjust.
11. Connect the test leads from the output NORMAL
terminals of the Fluke 5520A to the input
terminals on the Loop Calibrator.
12. The Loop Calibrator will display "MEASURE" and
0.000 V. The Secondary display will show the
last 3 digits of the A/D reading. Set the 5520A to
output 0.000 V into the Loop Calibrator.
13. Press . After a moment, 25.000 V will
display on the Loop Calibrator. Set the 5520A to
output 25.000 V into the Loop Calibrator.
14. Press to complete the adjustment. The
calibration counter is incremented and the
calibration data is stored. The calibration count
will be on the main display and "CAL" on the
secondary display for 2 seconds.
The calibration adjustment procedure is complete.
To see the value of the calibration counter without
calibrating the unit, hold down at power up. The
software revision number is displayed for 2 seconds
followed by the calibration counter for 2 seconds.
User-Replaceable Parts
User-replaceable parts, are listed in and shown in
Figure 4 and Table 5.

Loop Calibrator
User-Replaceable Parts
9
Case, Top
Keypad Assembly
Main PCA
Foot
LCD
Elastomeric Strip
(Keypad to PCA)
Elastomeric Strip
(LCD to PCA)
Switch Support Assembly
Case, Bottom
Battery Door
Battery
Screw, THD Form, PH.P.STL,
5-14 x .750
adi10f.emf
Figure 4. User-Replaceable Parts

Fluke 707
Calibration Information
10
Table 5. User-Replaceable Parts
Description
Part No.
Qty.
Rotary knob
1618022
1
Case top
1618355
1
Keypad
1612222
1
Case bottom
1618005
1
Non-skid foot
885884
1
Battery. 9 V, Alkaline, ANSI / NEDA 1604A or IEC 6LR61
614487
1
Case screws
665098
4
Battery door
665106
1
Instruction sheet pack
1611701
1
Test lead set
Cap, Black
Cap, Red
855742
3986568
3995524
1
1
1
Alligator clips, Black
Alligator clips, Red
4239092
4239050
1
1
Holster, yellow
C10
1