Fluke Series II Manual

PN 601648
May 1996
© 1996 Fluke Corporation, Inc.
All rights reserved. Printed in U.S.A.
®
5700A/5720A
Series II Multi-Function Calibrator
Operator Guide

1
Contents
What is in this Guide? ................................ 2
Safety Summary......................................... 2
PFuse and Line Voltage .......................... 4
Basic Operation.......................................... 5
A Short Calibration Exercise....................... 5
Warming up the Calibrator ..................... 5
Exercise: Running dc Zero Calibration........ 6
Connecting a Meter................................ 6
Applying a dc Voltage ............................ 7
Checking the Calibrator Uncertainty....... 7
Exercise: Activating Error Mode ............. 8
Checking the Meter’s Higher and Lower
Ranges..................................... 8
Exercise: Applying an ac Voltage........... 9
Front Panel Features.................................. 10
Output Display (Left Side)...................... 10
Control Display (Right Side)................... 10
Display Screen Saver............................. 11
Front Panel Keys ................................... 12
Front Panel Connectors ......................... 21
Rear Panel Features .................................. 23
Rear Panel Connectors.......................... 23
Switches and Fuse Holder...................... 26
Cable Recommendations............................ 27
Connecting to a UUT (Unit Under Test) ...... 28
Using Error Mode....................................... 35
Operating in Remote .................................. 37
RS-232-C Interface Parameters.................. 38

2
What is in this Guide?
The Operator Guide begins with safety
information, a short meter calibration exercise for
new users, then continues with a condensation of
information from the
Operator Manual . For
complete information about the Calibrator’s
features, functions, and operating procedures,
refer to the
Operator Manual .
Safety Summary
Warning
[
Lethal voltage may be present on the
terminals. Observe all safety
precautions in this guide.
To avoid electrical shock hazard, the operator
should not electrically contact the OUTPUT HI or
SENSE HI binding posts. During operation, lethal
voltages of up to 1100V ac or dc may be present
on these terminals.
Whenever possible, keep one hand away from the
equipment to reduce the hazard of current flowing
through vital organs of the body.
Symbols Marked on Equipment
[Warning - Risk of electric shock.
QGround Protective ground (earth) terminal.
PAttention Refer to the manual for
information about this feature. This symbol
appears on the rear panel ground terminal
and by the fuse holder.
Use the Proper Fuse
To avoid fire hazard, use only the fuse specified
on the line voltage selection switch label.

3
Safety Summary (cont.)
[Grounding the Calibrator
The Calibrator is a Safety Class I (grounded
enclosure) instrument. The enclosure is grounded
through the grounding conductor of the power
cord. To avoid electrical shock, plug the power
cord into a properly wired earth grounded
receptacle before making any connections to the
Calibrator terminals. A protective ground
connection by way of the grounding conductor in
the power cord is essential for safe operation.
[Do Not Remove the Cover
To avoid personal injury, do not remove the
Calibrator cover. Do not operate the Calibrator
without the cover properly installed. There are no
user-serviceable parts inside the Calibrator, so
there is no need to ever remove the cover.

4
P Fuse and Line Voltage
The correct fuse type for each voltage selection is
indicated on the rear panel as shown in the
following figure.
VOLTAGE
SELECTION FUSE-F1
T 125A
250V
(SB)
100V S2 S3 S4
110V
115V
120V
VOLTAGE
SELECTION FUSE-F1
T 125A
250V
(SB)
200V S2 S3 S4
220V
230V
240V
CAUTION FOR FIRE PROTECTION REPLACE ONLY
WITH A 250V FUSE OF INDICATED RATING.
VOLTAGE
SELECTION FUSE-F1
T 125A
250V
(SB)
100V S2 S3 S4
110V
115V
120V
VOLTAGE
SELECTION FUSE-F1
T 125A
250V
(SB)
200V S2 S3 S4
220V
230V
240V
CAUTION FOR FIRE PROTECTION REPLACE ONLY
WITH A 250V FUSE OF INDICATED RATING.
Line Power Label and Switch Locations

5
Basic Operation
To set the output, simply press the following
sequence of keys to select an output function and
amplitude:
[numeric keys] [multiplier] [function] E O
For example, to set the output to 10 mV dc, press:
1 0 m V E O
To set an ac output, press the following additional
keys:
[numeric keys] [multiplier] H E
For example, to change the present 10 mV dc to
10 mV ac @ 1.8 kHz, press:
1 . 8 K H E
To change the output back to dc, press:
0 H E
or
+ E
A Short Calibration Exercise
If you are not familiar with the Calibrator, you will
find that the following exercise quickly teaches you
some important front panel operations.
Warming up the Calibrator
When you first turn the Calibrator on, you should
let it warm up for 30 minutes. This ensures that the
Calibrator meets or exceeds its specifications.

6
Exercise: Running dc Zero Calibration
DC Zero is a brief internal process that removes
offset errors. The specifications require that you
run dc Zero at least every 30 days.
To run dc Zero, press the following sequence of
softkeys:
Setup Menus Cal Zero
Press any key, then press Ptwice to return to
normal operation.
Connecting a Meter
Typical connections for handheld and benchtop
meters are shown on the next page. The diagrams
show the use of Fluke Model 5440-7002 Low
Thermal Cables. Other types of cable may be used
for this exercise. To connect either type of meter,
proceed as follows:
1. Verify that the Calibrator is on, and is in
standby mode (STANDBY indicator lit). If the
Calibrator is not in standby, press r.
2. Set the meter to the lowest range that reads
10V dc.
3. Connect the shield lead (if your cables are
shielded) to V GUARD on the Calibrator.
4. Verify that both Xand xare off. Press
them if they are lit.
5. Connect the meter input LO to the Calibrator
OUTPUT LO.
6. Connect the meter input HI to the Calibrator
OUTPUT HI.

7
Exercise: Connecting a Meter (cont.)
HI HI
LO LO
HI
AUX
CURRENT GUARD GROUND
WIDEBAND
Calibrator
10A
300mA
V
COM
DMM
NC
EX SNS : OFF EX GRD : OFF
OUTPUT
V A
ΩSENSE
V
Ω
Ω
HI HI
LO LO
HI
OUTPUT
V A SENSE
V
AUX
CURRENT
GUARDGROUND
WIDEBAND
Calibrator
DMM
INPUT
NC
EX SNS
: OFF
EX GRD
: OFF
ΩΩ
Applying a dc Voltage
Apply 10V dc to the meter by pressing the
following sequence of keys:
10VEO
Checking the Calibrator Uncertainty
Press s. The total uncertainty for the 10V you
are applying to the meter is displayed on the
Control Display (the large dot-matrix display on the
right side of the front panel). This number depends
on the setting of the calibration cycle and
specification confidence level in a setup menu.
Press Pto clear the uncertainty display.

8
Exercise: Activating Error Mode
Chances are the meter reads something other than
exactly 10V. To quickly check the error of the
meter, turn the rotary knob to obtain a meter
reading of exactly 10V, and read the error off the
Control Display.
Turning the knob is all it takes to activate error
mode. When you turn the knob, the least
significant digit is highlighted. This digit changes
as you turn the knob. To change a higher order
digit, thereby speeding up the adjustment rate,
press <.
The error on the Control Display is a combination
of offset, scale, and linearity errors. You can view
component parts of the error by pressing oand
S.
Checking the Meter’s Higher and Lower Ranges
To check the meter error at 100V dc, first set the
meter range (if applicable) to the lowest range that
reads 100V. Press YO. This sets a new
reference equal to ten times the previous
reference of 10V dc. (Pressing Owas necessary
because the Calibrator goes into standby when it
crosses the safety threshold from below 22V to
over 22V.) Turn the rotary knob to re-activate error
mode and determine the meter error at 100V.
Now press ZZ. Set the meter range switch (if
applicable) to the lowest range that reads 1V.
To end the error mode session, press E.
This recalls the reference value and exits error
mode.
Press rto set the output to 0 mV dc in standby.

9
Exercise: Applying an ac Voltage
There is no “ac mode” switch on the Calibrator.
You change a dc output to ac by entering a
frequency through the keypad and pressing
E.
To test the meter at 10V at 1 kHz, set the meter to
read 10V ac, press 10V, then 1K
HEO. Adjust the rotary knob for a
reading on the meter of exactly 10V.
To test the meter’s flatness, press a. The 0.1 Hz
digit is highlighted. Press <four times. Turn the
knob to change the 1 kHz digit until the Calibrator
is set to 10 kHz. Press aand turn the knob
again to check the meter’s accuracy at 10 kHz.
Each time you change the frequency, you need to
wait for the Calibrator output to settle (the “u”
annunciator will go out).
This ends the front panel exercise. To zero the
output and go to standby, press r.

10
Front Panel Features
Following is a brief description of the Calibrator’s
front panel features.
Output Display (Left Side)
Shows output amplitude and frequency. The top
line shows the active output value in up to eight
digits, plus a polarity sign. The bottom line shows
output frequency in five digits. Annunciators below
the amplitude line on the output display indicate
the following active conditions:
OPERATE Lit when an output is active at the
binding posts or auxiliary amplifier.
STANDBY Lit when the Calibrator is in standby.
ADDR Lit when the Calibrator is addressed
over the IEEE-488 interface.
ØLCK Lit when the Calibrator output is
phase locked to a signal at the rear
panel PHASE LOCK connector.
ØSHF Lit when the Calibrator output has a
programmed phase difference with a
signal at the real panel VARIABLE
PHASE OUT connector.
u (Unsettled) Lights when the output is
changed, and remains lit until the
output settles to within specification.
Control Display (Right Side)
Shows data entries, UUT error adjustments,
softkey labels, and other prompts and messages.
Each softkey label identifies the functions of the
softkey that appears directly below it. All of the
softkey labels that appear on the display at once
are referred to as a menu. When you access the
function provided through the softkeys, you open
up other menus, containing new softkey labels.

11
Display Screen Saver
Both the Output and Control displays blank
automatically after 30 minutes of inactivity, unless
the Calibrator is in one of the operating states that
overrides the screen saver.
If the screen saver has activated, you can restore
the display by pressing C. Pressing another key
or turning the knob restores the display and
performs the command sent by the key or knob.
The screen saver does not operate:
•if any part of the Setup menu is displayed.
•during remote operation.
•during calibration or diagnostics.
•when an error message is displayed.

12
Front Panel Keys
O
Toggles the Calibrator between operate and
standby modes. In standby mode, the OUTPUT
binding posts are internally disconnected from the
Calibrator. The Calibrator powers up in standby
mode.
The Calibrator automatically switches to standby
mode when:
•ris pressed.
•the Calibrator is sourcing an ac or dc voltage
below 22V, and a voltage greater than 22V is
selected.
•the output function is changed, e.g., from dc
current to ac current.
•the output location is changed.
The Calibrator does not switch to standby when
the voltage is switched from any ac or dc voltage
to an ac or dc voltage less than 22V.

13
Front Panel Keys (cont.)
X
Opens and closes an internal connection between
the SENSE and OUTPUT binding posts. The
Calibrator powers up with these two binding posts
connected internally (the SENSE binding posts are
open circuited), and the Xindicator off. Toggling
Xon (so it lights) disconnects the sense lines
from the OUTPUT binding posts.
External sensing should be used in the following
function under the stated conditions.
•In the dc voltage function when the UUT
draws enough current to produce a significant
voltage drop in the cables.
•In the resistance function when the UUT has a
four-wire input and the Calibrator is set to 100
kΩor less.
•External sensing can also be used in the two-
wire ohms function to activate two-wire
compensation circuitry to the UUT terminals.

14
Front Panel Keys (cont.)
x
Opens and closes an internal connection between
the V GUARD (voltage guard) and OUTPUT LO.
The Calibrator powers up with the V GUARD
internally connected to OUTPUT LO and the x
indicator off. Toggling xon (so it lights)
disconnects OUTPUT LO from the V GUARD.
The V GUARD binding post provides an external
connection point for the voltage internal guard. For
a UUT with ungrounded inputs, the V GUARD
should be connected to LO internally. (The EX
GRD key is toggled off.) For a UUT with a
grounded input, the GUARD may be externally
connected to the grounded UUT input. (The EX
GRD key is toggled on.)
w
Enables and disables the -03 Wideband AC option
and sets the Calibrator to standby mode. When
enabled, the ac voltage output over the range of
10 Hz to 30 MHz is available at the front panel
WIDEBAND connector. The wideband function is
disabled whenever wis toggled off, or when
another function (such as current) is selected.

15
Front Panel Keys (cont.)
B
Enables or disables output from an amplifier, when
it would not otherwise be automatically selected.
Sets the Calibrator to standby if this selection
moves the output location.
When available, an amplifier is automatically
selected for output settings that exceed Calibrator
capabilities, but fall within the limits of the selected
amplifier. The Bkey is only needed to activate
an amplifier for an output setting that is available
from either the Calibrator or from the amplifier.
This allows you to take advantage of amplifier
capabilities other than extended range (i.e. higher
compliance voltage).
For both voltage and current, the amplifier is
assumed to be a 5725A unless another model is
designated in the Setup menus.
P
Aborts the current operation of the Calibrator and
recalls the previous menu. Some menus display a
more specific label for this key, such as “DONE
setting up.”
Softkeys u
The functions of the five unlabeled softkeys are
provided through each menu in the Control
Display, with each function located directly above
the softkey that activates that function. Many of
these functions access new menus that contain a
new set of functions for the softkeys, providing
access to many capabilities and configuration
options through the menu tree.
POWER switch
Turns the power on and off.

16
Front Panel Keys (cont.)
<a>
These keys are the output adjustment controls. If
any of these keys are pressed, or if the knob is
turned, a digit on the Output Display becomes
highlighted. Turning the knob adjusts the output
value. An error display appears on the Control
Display, showing the difference between the
original (reference) output and the new (adjusted)
output.
The <and >keys move the highlight to the
digit you wish to change. In the ac functions, the
akey allows you to move amongst voltage,
current, and frequency. In practice, for voltage and
current outputs, the knob and arrow keys are used
to adjust output until the UUT reads correctly. The
error display shows the UUT deviation from the
reference.
r
During local operation, pressing raborts the
current operating state of the Calibrator and
returns the Calibrator to the power-up default
state. (This key is not effective during remote
operation.)
S
Identifies a UUT full-scale endpoint for checking
linearity, and does not change the output. If the
output was adjusted with the rotary knob,
subsequent keyed-in output values are multiplied
by a scale factor. Scaling is deactivated by
pressing Sagain, or by selecting another
function. Scaling is not available for resistance
outputs.

17
Front Panel Keys (cont.)
L
Calls up a menu that allows you to specify limits
beyond which the Calibrator will not operate. This
can be used to set limits that protect both
operators and equipment.
Z
Changes the output to one tenth the reference
value (which is not necessarily the same as the
present output value). The value only changes if
the new value is within performance limits.
Y
Changes the output to ten times the reference
value (which is not necessarily the same as the
present output value). The value only changes if
the new value is within performance limits. This
key sets the Calibrator to standby if this change is
made from a value less than 22V to one that is
greater than or equal to 22V.
s
Causes the Calibrator to compute and display its
uncertainty for the present output setting for the
calibration interval and specification confidence
level selected in the setup menus.
o
Identifies a UUT zero-scale endpoint and does not
change the output. Subsequent keyed-in output
values have the offset value (the Calibrator output
value when owas pressed) added to them.
Offset mode is deactivated by pressing oagain,
or by selecting another function. Offsets are
available for dc outputs only.

18
Front Panel Keys (cont.)
C
Clears a partially completed keypad entry from the
Control Display, or clears an error message that
required acknowledgment, If there is a partially
completed entry when Cis pressed, the output is
unaffected.
N
This key is only active during error mode
operation. It establishes the present output value
as a new reference for meter error computation.
D
When in the ac volts, or wideband function, and if
no entry is in progress, the Dkey shows the
equivalent dBm output on the Control Display. For
the ac voltage function, dBm is calculated for a
600Ωload. (For ac outputs less than 220 mV, the
Calibrator output impedance is always
50Ω because the output is resistively divided.)For
the wideband function, dBm is calculated for a
50Ωresistive termination at the end of a three-foot
50Ωcoaxial cable.
Note
The formula to compute dBm is:
dBm = 10 log (power in mW)
Examples:
For 3.0V into a 600Ωload:
dBm = 10 log (15.000) = 11.7609 dBm
for 3.0V into a 50Ωload:
dBm = 10 log (180.000) = 22.5527 dBm