Fluke Series II Handbuch

PN 601648

May 1996

5700A/5720A

Series II Multi-Function Calibrator

Operator Guide

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

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.

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.

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

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

+ 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.

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.

Exercise: Connecting a Meter (cont.)

HI HI

LO LO

AUX

CURRENT GUARD GROUND

WIDEBAND

Calibrator

10A

300mA

COM

DMM

EX SNS : OFF EX GRD : OFF

OUTPUT

V A

ΩSENSE

Ω

HI HI

LO LO

OUTPUT

V A SENSE

AUX

CURRENT

GUARDGROUND

WIDEBAND

Calibrator

DMM

INPUT

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.

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

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.

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