Each Fluke product is warranted to be free from defects in material and workmanship under
normal use and service. The warranty period is one year and begins on the date of shipment.
Parts, product repairs and services are warranted for 90 days. This warranty extends only to the
original buyer or end-user customer of a Fluke authorized reseller, and does not apply to fuses,
disposable batteries or to any product which, in Fluke’s opinion, has been misused, altered,
neglected or damaged by accident or abnormal conditions of operation or handling. Fluke
warrants that software will operate substantially in accordance with its functional specifications for
90 days and that it has been properly recorded on non-defective media. Fluke does not warrant
that software will be error free or operate without interruption.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user
customers only but have no authority to extend a greater or different warranty on behalf of Fluke.
Warranty support is available if product is purchased through a Fluke authorized sales outlet or
Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for
importation costs of repair/replacement parts when product purchased in one country is submitted
for repair in another country.
Fluke’s warranty obligation is limited, at Fluke’s option, to refund of the purchase price, free of
charge repair, or replacement of a defective product which is returned to a Fluke authorized
service center within the warranty period.
To obtain warranty service, contact your nearest Fluke authorized service center or send the
product, with a description of the difficulty, postage and insurance prepaid (FOB Destination), to
the nearest Fluke authorized service center. Fluke assumes no risk for damage in transit.
Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB
Destination). If Fluke determines that the failure was caused by misuse, alteration, accident or
abnormal condition of operation or handling, Fluke will provide an estimate of repair costs and
obtain authorization before commencing the work. Following repair, the product will be returned to
the Buyer transportation prepaid and the Buyer will be billed for the repair and return
transportation charges (FOB Shipping Point).
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, WHETHER
ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR
ANY OTHER THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or
exclusion or limitation of incidental or consequential damages, the limitations and exclusions of
this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or
unenforceable by a court of competent jurisdiction, such holding will not affect the validity or
enforceability of any other provision.
Fluke CorporationFluke Europe B.V.
P.O. Box 9090P.O. Box 1186
Everett, WA 98206-90905602 BD Eindhoven
U.S.A.The Netherlands
5/94
Table of Contents
ChapterTitlePage
1Preparation for Use............................................................................ 1-1
D-1.Summary of RS-232 Connections ......................................................................... D-3
D-2.Hydra Series II (DB-9) to PC (DB-9) RS-232 Connection (Generic)................... D-4
D-3.Hydra (DB-9) to PC (DB-25) RS-232 Connection................................................ D-5
D-4.Hydra Series II (DB-9 to Modem (DB-25) RS-232 Connection........................... D-6
D-5.Hydra Series II (DB-9) to Printer (DB-25) RS-232 Connection ........................... D-7
D-6.RS-232 DB-9 and DB-25 Connectors.................................................................... D-8
G-1.Comparison of Common Waveforms.................................................................... G-2
x
CAUTION
THIS IS AN IEC SAFETY CLASS 1 PRODUCT. BEFORE USING, THE GROUND WIRE IN THE
LINE CORD OR THE REAR PANEL BINDING POST MUST BE CONNECTED FOR SAFETY.
Interference Information
This equipment generates and uses radio frequency energy and if not installed and used in strict
accordance with the manufacturer’s instructions, may cause interference to radio and television
reception. It has been type tested and found to comply with the limits for a Class B computing
device in accordance with the specifications of Part 15 of FCC Rules, which are designed to
provide reasonable protection against such interference in a residential installation.
Operation is subject to the following two conditions:
This device may not cause harmful interference.
•
This device must accept any interference received, including interference that may cause
•
undesired operation.
There is no guarantee that interference will not occur in a particular installation. If this equipment
does cause interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one of more of
the following measures:
Reorient the receiving antenna
•
Relocate the equipment with respect to the receiver
•
Move the equipment away from the receiver
•
Plug the equipment into a different outlet so that the computer and receiver are on different
•
branch circuits
If necessary, the user should consult the dealer or an experienced radio/television technician for
additional suggestions. The user may find the following booklet prepared by the Federal
Communications Commission helpful: How to Identify and Resolve Radio-TV Interference
Problems. This booklet is available from the U.S. Government Printing Office, Washington, D.C.
20402. Stock No. 004-000-00345-4.
Declaration of the Manufacturer or Importer
We hereby certify that the Fluke Model 2635A Data Bucket is in compliance with BMPT Vfg
243/1991 and is RFI suppressed. The normal operation of some equipment (e.g. signal
generators) may be subject to specific restrictions. Please observe the notices in the users
manual. The marketing and sales of the equipment was reported to the Central Office for
Telecommunication Permits (BZT). The right to retest this equipment to verify compliance with the
regulation was given to the BZT.
Bescheinigung des Herstellers/Importeurs
Hiermit wird bescheinigt, daβ Fluke Model 2635A Data Bucket in Übereinstimung mit den
Bestimmungen der BMPT-AmtsblVfg 243/1991 funk-entstört ist. Der vorschriftsmäßige Betrieb
mancher Geräte (z.B. Meßsender) kann allerdings gewissen Einschränkungen unterliegen.
Beachten Sie deshalb die Hinweise in der Bedienungsanleitung. Dem Bundesamt für Zulassungen
in der Telekcommunikation wurde das Inverkehrbringen dieses Gerätes angezeigt und die
Berechtigung zur Überprüfung der Seire auf Einhaltung der Bestimmungen eingeräumt.
Fluke Corporation
xi
Safety Terms in this Manual
This instrument has been designed and tested in accordance with iec publication 1010,
safety requirements for electrical measuring, control and laboratory equipment. This user
manual contains information, warnings, and cautions that must be followed to ensure
safe operation and to maintain the instrument in a safe condition. Use of this equipment
in a manner not specified herein may impair the protection provided by the equipment.
The meter is designed for iec 664, installation category ii use. It is not designed for use
in circuits rated over 4800va.
Warning statements identify conditions or practices that could result in personal injury
or loss of life.
Caution statements identify conditions or practices that could result in damage to
equipment.
Symbols Marked on Equipment
danger - high voltage.
ground (earth) terminal.
protective ground (earth) terminal. Must be connected to safety earth
ground when the power cord is not used. See Chapter 2.
attention - refer to the manual. This symbol indicates that information
about usage of a feature is contained in the manual. This symbol appears
in the following two places on the instrument rear panel:
1. Ground binding post (left of line power connector). Refer to "Using
External DC Power" in Chapter 2.
2. Alarm outputs/digital i/o connectors. Refer to Appendix A,
Specifications.
Warning
To avoid electric shock:
•When the input module is installed, consider all channels
with connections as accessible terminals that may be
hazardous live.
•Disconnect the input module before touching or changing
external wiring.
•Remove inputs from live voltages before opening the i nput
module.
xii
AC Power Source
The instrument is intended to operate from an ac power source that will not apply more
than 264v ac rms between the supply conductors or between either supply conductor and
ground. A protective ground connection by way of the grounding conductor in the power
cord is required for safe operation.
DC Power Source
The instrument may also be operated from a 9 to 16v dc power source when either the
rear panel ground binding post or the power cord grounding conductor is properly
connected.
Use the Proper Fuse
To avoid fire hazard, use only a fuse identical in type, voltage rating, and current rating
as specified on the rear panel fuse rating label.
Grounding the Instrument
The instrument utilizes controlled overvoltage techniques that require the instrument to
be grounded whenever normal mode or common mode ac voltages or transient voltages
may occur. The enclosure must be grounded through the grounding conductor of the
power cord, or if operated on battery with the power cord unplugged, through the rear
panel ground binding post.
Contents
(continued)
Use the Proper Power Cord
Use only the power cord and connector appropriate for the voltage and plug
configuration in your country.
Use only a power cord that is in good condition.
Refer cord and connector changes to qualified service personnel.
Do Not Operate in Explosive Atmospheres
To avoid explosion, do not operate the instrument in an atmosphere of explosive gas.
Do Not Remove Cover
To avoid personal injury or death, do not remove the instrument cover. Do not operate
the instrument without the cover properly installed. Normal calibration is accomplished
with the cover closed, and there are no user-serviceable parts inside the instrument, so
there is no need for the operator to ever remove the cover. Access procedures and the
warnings for such procedures are contained in the service manual. Service procedures
are for qualified service personnel only.
Do Not Attempt to Operate if Prot ect ion may be Impaired
If the instrument appears damaged or operates abnormally, protection may be impaired.
Do not attempt to operate it. When in doubt, have the instrument serviced.
xiii
Introduction
This manual contains information and warnings that must be followed to
ensure safe operation and keep the instrument in safe condition.
Data Bucket operation and operational features can be understood in about ten minutes
by completing the following procedure. Prior to staring the procedure, connect the
instrument to a power source (see Chapter 1) and connect the supplied test leads to the
front panel jacks (Channel 0). Some steps terminate when you press the C key instead
of the E key because the completed step is beyond the scope of this quick tour.
However, all steps contain a figure reference in brackets [] for additional information.
For example, the first step of applying power refers to [Figure 2-2], which describes
three other ways of applying power (Configuration-Reset, Display-Hold, and
Temperature-Toggle). Therefore, this procedure may be used for a quick instrument
familiarization or as a basis for instrument applications.
It is assumed that the instrument is being powered for the first time or a configurationreset procedure cleared the instrument of configuration data. To apply a configurationreset to the instrument, hold down the C key when turning on the power and keep
holding until the meter “beeps” in acknowledgment.
Ten Minute Tour
Note
xiv
Ten Minute Tour
(continued)
POWER
FUNC
CH
20
...
10
...
0
SET FUNC
OFF
°F [°C]
Hz
Ω
VAC
V DC
Applying power. Press the power switch to
apply power. Other power-on options include
Configuration-Reset, Display-Hold, and
Temperature-Toggle. [Figure 2-2]
Selecting a Channel. Up/down arrow keys
select a channel from 0 to 20. Channel 0
connections are on the front panel; Channels 1
through 20 connections are via the rear-panel
Universal Input Module. Select Channel 10.
[Figure 2-3]
Selecting a Function. Press the FUNC key to
open the function menu. Up/down arrow keys
select a function. Temperature unit °F/°C is set
with the Temperature-Toggle Power-On
procedure. Select VAC, then press ENTER.
[Figure 2-5]
ENTER
ENTER
A
SET FUNC
Auto
150.00 V
30.000 V
3.0000 V
300.00 mV
Selecting a Measurement Scale. Up/down
arrow keys select a measurement scale. AUTO
indicates autoranging, where the instrument
automatically selects the scale that provides the
best measurement resolution. Scale values are
maximum expected readings, e.g., the 30.000
VAC scale is for measurements of 30 VAC or
less. Select 150.00 V scale, then press ENTER.
Channel 10 is now configured. [Figure 2-5]
op79_1f.eps
Ten Minute Tour
xv
2635A
Users Manual
A
FUNC
CH
20
...
10
...
0
SET FUNC
OFF
°F [°C]
Hz
Ω
VAC
V DC
Selecting a Channel. Select Channel 0 with the
up/down arrow keys. Notice each key entry is
acknowledged with a short "beep." Try the
left/right arrow keys and notice a long beep.
Short beeps represent correct entries; long beeps
represent incorrect entries. [Figure 2-3]
Selecting a Function. Press FUNC to open the
function menu, use up/down arrow keys to select
Ω, then press ENTER. [Figure 2-6]
ENTER
ENTER
ENTER
B
SET FUNC
Auto
10.000 M
3.0000 M
300.00 k
30.000 k
3.0000 k
300.00
SET FUNC
2T
4T
Selecting a Measurement Scale. Select the
300.00 scale with up/down arrow keys, then
press ENTER. [Figure 2-6]
Selecting a Terminal Configuration.
Resistance measurements for channels 1
through 10 can use two channels (4 terminals) for
increased precision. For channels 0 and 11 to
20, only 2 terminal (2T) connections are allowed.
Press ENTER. [Figure 2-6]
Ten Minute Tour (cont)
xvi
op79_2f.eps
B
MON
Ten Minute Tour
(continued)
MON
SCAN
SCAN
MON
0
10
SCAN
0
10
Selecting the Monitor Mode. Press the MON
key to enable monitoring. Up/down arrow keys
select any configured channel for monitoring.
When Channel 0 (Ω) is selected, touch the probe
tips together to measure test lead resistance.
Channel 10 (VAC) may have a small reading
because the input is unterminated. Press MON to
exit monitoring. [Figure 2-17]
Selecting the SCAN Mode. Press the SCAN
key to enable scanning. The display will indicate
which channel is being measured during the
scan. Monitor or Review can be enabled during
scanning. Measurement data can be routed to
the memory card, printer, or PC for display or
processing. Press SCAN to exit scanning.
[Figure 2-15]
SHIFT
SCAN
C
SCAN
0
10
Selecting the Single Scan Mode. Press the
SHIFT key, release, then press the SCAN key to
make a SINGLE measurement scan.
[Figure 2-15]
op79_3f.eps
Ten Minute Tour (cont)
xvii
2635A
Users Manual
C
INTVL
CANCL
REVIEW
SHIFT
SET
0:00:00
REVIEW
LAST MIN MAX
0
10
Setting the Scan Interval. Press the INTVL key
to open the interval menu. Up/down and left/right
arrow keys select 0:00:00 (default) to 9:99:99.
The format is HOURS:MINUTES:SECONDS.
The scan interval is the total time between the
start of each measurement cycle. 0:00:00
represents continuous scanning. Press CANCL
to exit. [Figure 2-11]
Selecting the Review Mode. Press the
REVIEW key to open the Review array. The
Review array holds the last, maximum, and
minimum readings during all previous scans for
all configured channels. Up/down arrow keys
select the channel, while left/right arrow keys
select LAST, MAX, and MIN. To CLEAR the
Review array, press the SHIFT key, release,
then press the REVIEW key. The Review array
is cleared automatically by changing any
parameter on any channel (including
Measurement Rate). Press CANCL to exit.
[Figure 2-18]
REVIEW
CANCL
D
20
...
10
...
0
CH
Ten Minute Tour (cont)
Select Channel 10. Select Channel 10 with the
up/down arrow keys. [Figure 2-3]
op79_4f.eps
xviii
D
ALRM
Ten Minute Tour
(continued)
CANCL
Mx+B
CANCL
SET ALARM
1
2
SET Mx+B
M
+001.00
Selecting Alarms. Press the ALRM key to open
the alarm menu. Each configured channel can
have two alarm limits assigned. An alarm is set
when a reading is below or above an alarm limit.
Configuration starts with an alarm limit selection,
1 or 2. Press CANCL to exit. [Figure 2-13]
Setting Mx+B Scaling. Press the Mx+B key to
open the Mx+B menu. Up/down and left/right
arrow keys select the digits for the first parameter
(M) (default +001.00). The effect of Mx+B scaling
is to take a measurement (x) and modify it by
multiplying the measurement with M and then
adding an offset B (configured after M is set). For
example, Mx+B=+1.5x+25 applied to a
measurement of 20.000 would display
Selecting the Measurement Rate. Press the
SHIFT key, release, then press the Right Arrow
key to open the RATE menu. During the
measurement portion of the scan interval, the
measurement rate can be FASt (Fast) or SLO
(Slow). The slow rate gives full 5-digit
measurement resolution, while the fast rate gives
only 4-digit resolution. The advantage of a fast
measurement rate is more readings during
continuous scanning or low scan intervals. Press
CANCL to exit. [Figure 2-12]
op79_5f.eps
Ten Minute Tour (cont)
xix
2635A
Users Manual
E
SHIFT
INTVL
CANCL
TOTAL
SHIFT
yEAR
94
totAL
0
Setting Date and Time. Press the SHIFT key,
release, then press the INTVL key to open the
date and time (CLOCK) menu. Up/down and
left/right arrow keys select the YEAR 00 to 99.
For the complete procedure, this is followed by
MONTH:DAY and HOURS:MINUTES. Press
CANCL to exit. [Figure 2-21]
Selecting the Totalizer Feature. Press the
TOTAL key to open the totalizer display. The
totalizer operates independently as a separate
instrument function. Contact closures or voltage
transitions between pins Σ and on the rear
panel DIGITAL I/O connector are totaled and
displayed by pressing the TOTAL key. To ZERO
the total (already 0 in this example), press the
SHIFT key, release, then press the TOTAL key
again. Press CANCL to exit. [Figure 2-20]
TOTAL
CANCL
F
Ten Minute Tour (cont)
op79_6f.eps
xx
F
SHIFT
MON
CANCL
tRIg
ALAr
On
OFF
Ten Minute Tour
Selecting Triggering Options. Press the SHIFT
key, release, then press the MON key to open
the TRIGS option menu. A trigger option can
trigger scanning, instead of using the SCAN key.
OFF indicates no triggering option; ON indicates
the external trigger option is active (a contact
closure or voltage transition between pins TR and
on the rear panel ALARM OUTPUTS connector);
ALAr (Alarm) indicates scan triggering when a
monitored channel goes into Alarm. Press
CANCL to exit. [Figure 2-19]
(continued)
SHIFT
LIST
CANCL
G
bAUd
38400
...
300
Setting the Communication Parameters.
Press the SHIFT key, release, then press the
LIST key to open the COMM menu. The
communication parameters configure the rearpanel RS-232 interface for printer and PC
operations. The first selection is bAUd (Baud)
with rates from 300 to 38400 baud. For the
complete procedure, this is followed by parity,
flow control and echo. Press CANCL to exit.
[Figure 5-2]
op79_7f.eps
Ten Minute Tour (cont)
xxi
2635A
Users Manual
G
LIST
CANCL
SHIFT
FILES
ENTER
LISt
dir
LASt
dESt
both
Print
CArd
nonE
Setting the LIST Parameters. Press the LIST
key to open the LIST menu. LIST is used to print
out all the measurements from the Review Array,
or print out a directory of all the files on the
memory card by selecting dir (Directory). To use
LIST, a printer (or PC) must be connected to the
RS-232 port. Press CANCL to exit. [Figure 5-4]
Setting the DESTINATION Parameter. Press
the SHIFT key, release, then press the FILES
key to open the MODE menu. CArd (Card)
routes data to the memory card; Print (Print)
routes data to the RS-232 connector to a printer
(or PC); both (Both) routes data to both
destinations, and nonE (None) to neither
destination. Select CArd and press ENTER.
[Figure 5-3]
CANCL
H
MODE
trAnS
ALAr
ALL
Selecting the Destination Mode. ALL (All)
sends all measurement data to the destination
device (Memory Card in this example); ALAr
(Alarm) send all measurement data to the
destination device when any scanned channel is
in alarm; trAnS (Transition) sends all
measurement data to the destination device
when any scanned channel transitions into or out
of an alarm condition. Press CANCL to exit.
[Figure 5-3]
op79_8f.eps
Ten Minute Tour (cont)
xxii
H
Ten Minute Tour
(continued)
FILES
CANCL
FILES
Init
StAt
dir
dAtA
SEtUP
Selecting the File Options. Press the FILES
key to open the Files menu. This menu selects
the memory card functions. SEtUP (Setup)
selects card functions for instrument
configuration files (SEtxx); dAtA (Data) selects
card functions for measurement data files
(dAtxx); dir (Directory) lists the number of
kilobytes free on the card and the name and size
of each SEtxx and dAtxx file; StAt (Status) lists
which SEtxx and dAtxx files are currently active
and percentage of the card that is used; Init
(Initialize) formats a blank card or erases and
formats a used card. Press CANCL to exit.
[Figure 3-3]