Simpson 2865 User manual

2865 and 2866
3-½ Digit Panel Instruments
INSTRUCTION MANUAL

2
About this Manual
Tothebestofourknowledgeandatthetimewritten,theinformationcontainedinthis
documentistechnically correct and the proceduresaccurateand adequate to oper-
atethis instrumentin compliance with itsoriginal advertised specifications.
Notes and Safety Information
ThisOperator’sManualcontainswarning headings which alerttheuser to checkfor
hazardous conditions.These appear throughout this manual where applicable and
aredefinedbelow.To ensure the safetyofoperatingperformance of thisinstrument,
theseinstructions mustbeadhered to.
Warning, refertoaccompanyingdocuments.
Caution, risk of electric shock.
Technical Assistance
SIMPSON ELECTRIC COMPANY offers assistance Monday through Friday
7:30 am to 5:00 pm CentralTime.ContactTechnical Support or Customer Service
at [phone].
Internet: http://www.simpsonelectric.com
Warranty and Returns
SIMPSONELECTRICCOMPANYwarrantseachinstrumentandotherarticlesmanu-
facturedbyitto be free from defectsinmaterialand workmanship under normal use
and service, its obligation under this warranty being limited to making good at its
factory or other article of equipment which shall within one (1) year after delivery of
such instrument or other article of equipment to the original purchaser be returned
intact to it, or to one of its authorized service centers, with transportation charges
prepaid, and which its examination shall disclose to its satisfaction to have been
thusdefective;thiswarrantybeingexpresslyinlieuofallotherwarrantiesexpressed
or implied and of all other obligations or liabilities on its part, and SIMPSON ELEC-
TRICCOMPANY neither assumes nor authorizesanyotherpersons to assume for
it any other liability in connection with the sales of its products.
This warranty shall not apply to any instrument or other article of equipment which
shall have been repaired or altered outside the SIMPSON ELECTRIC COMPANY
factory or authorized service centers, nor which has been subject to misuse, negli-
genceoraccident,incorrect wiring by others, orinstallationorusenot in accord with
instructions furnished bythemanufacturer.
This manual represents your meter as manufactured at the time of publication. It
assumes standard software. Special versions of software may be fitted, in which
caseyou will be providedwith additional details.
TheapparatushasbeendesignedandtestedinaccordancewithEN61010-1,“Safety
RequirmentsforElectricalEquipmentforMeasurement,Control andLaboratoryUse.”
This operationg guide contains information and warnings that must be followed by
theuser to ensure safeoperation and to maintaintheapparatus in asafecondition.
We reserve the right to make changes and improvements to the product without
obligation to incorporate these changes and improvements into units previously
shipped.
!

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SHOCK HAZARD: As defined in American National Standard, C39.5, Safety
Requirements for Electrical & Electronic Measuring & Controlling Instrumenta-
tion
, a shock hazard shall be considered to exist at any part involving a potential
in excess of 30 volts RMS (sine wave) or 42.4 volts DC or peak and where a
leakage current from that part to ground exceeds 0.5 milliampere, when mea-
sured with an appropriate measuring instrument defined in Section 11.6.1 of
ANSI C39.5.
NOTE: The proper measuring instrument for the measurement of leakage cur-
rentconsists essentially of anetwork of a1500 ohm non-inductive resistorshunted
by a 0.15 microfarad capacitor connected between the terminals of the measur-
inginstrument. The leakage currentis that portion of the current that flowsthrough
the resistor. The Simpson Model 229-Series 2 AC Leakage CurrentTester meets
the ANSI C39.5 requirements for the measurement of AC leakage current and
can be used for this purpose. To measure DC Leakage current, connect a 1500
ohm non-inductive resistor in series with a Simpson 0-500 DC .microammeter
and use this as the measuring instrument.

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Contents
1. INTRODUCTION ............................................................................... 5
1.1 General ..................................................................................................5
1.2 Safety Precautions .................................................................................5
1.3 Theory of Operation ...............................................................................7
2. INSTALLATION .................................................................................. 8
2.1 Panel Mounting Instructions ..................................................................8
2.2 Power Source Requirements.................................................................8
2.3 Connections ...........................................................................................8
3. SERVICINGINSTRUCTIONS ............................................................ 9
3.1 Case and Front Cover Removal ..........................................................10
3.2 Line Fuse Replacement (2865 only) ...................................................10

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1. INTRODUCTION
1.1 General
The Simpson 2865 and 2866 (hereafter referred to as the 2865 or 2866 or the
Instruments) are 3½-digit, panel-mounted instruments that provide visual indica-
tion for either DC voltage or DC current measurement. Both Instruments feature
0.1 percent accuracy using solid-state integrated circuit electronics.
The 2865 can be used as a self-contained, panel-mounted unit, operating from
either a 120 or 240 volt AC, 50 to 400 Hz power source.The 2866 is designed to
operate from a 5 VDC power source. Both Instruments feature solid-state, light-
emitting diode (LED) displays, automatic polarity selection and indication, auto-
matic zeroing, excellent temperature characteristics, high input resistance (for
DC voltage models), fast response time and automatic out-of-range indication.
These Instruments, which provide high reliability and compact design, use a
Large-Scale-Integration (LSI) module for the analog-to-digital circuitry.
Both Instruments are especially suited for system-oriented application. The ver-
satility of AC line or DC operation and 200 mV full range sensitivity allow each
Instrument to be used as a direct replacement for an analog type instrument.This
feature makes it convenient to convert existing instruments or systems from ana-
log to digital display and at the same time improve the performance of a system.
NOTE: This Operator’s Manual contains information essential to the operation of
this Instrument. Keep in a convenient place and use for reference as required.
TheseInstrumentsaredesignedfor maximum safety to the operator whenmounted
in a panel according to instructions contained in paragraph 2.1.They are not to be
used unmounted or for exploratory measurements in unknown circuits.
1.2 Safety Precautions
These Instruments do not themselves present a shock hazard, but if connected to
auxiliaryline-operated equipment, theauxiliary circuits mustbe properly grounded
for safety and to prevent improper readings.
When connecting the 2865 to a power line circuit, make certain that the ground
terminal of the PC board is connected to earth ground.
Do not attempt to float the input terminals at more than 250V DC with respect to
power line (earth) ground. Doing so may damage the Instrument.
Before removing the power connector from the Instruments, make certain that the
circuit power sources are de-energized and any capacitors are discharged.
!

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Table 1. Technical Data
1. Full Scale Ranges: DCVoltage
DC Current
2. Accuracy: ±(0.1% of input + 1 count) at refer-
ence conditions
3. Temperature Coefficient: ±(0.01% of input +0.05 count) per
°C from 0° to +55°C
4. Sensitivity: 100 µV for 200 mV unit
10 nA for 20 µA unit
5. Resolution: One part in 2000
6. lnput Bias Current: 10 pA maximum at reference con-
ditions
7. Full Range Step Response: 1 second
(to rated accuracy)
8. Norm. Mode Rejection: 50 dB minimum at 60 Hz
9. Com. Mode Rejection: 90 dB minimum (2865 only)
(with 1 kV unbalance at 60 Hz)
egnaR mumixaM noitacidnI tupnI ecnatsiseR
srebmuNgolataC
56826682
Vm002Vm9.991±M001 ⍀0054200642
V2V999.1±M001 ⍀1054210642
V02V99.91±M01 ⍀2054220642
V002V9.991±M01 ⍀3054230642
.segnarlla,V052:otdetcetorPegatlovrevO
egnaR mumixaM noitacidnI
mumixaM tupnI ecnatsiseR
srebmuNgolataC
56826682
Aµ02Aµ99.91±Am024054240642
Aµ002Aµ9.991±Am025054250642
Am2Am999.1±Am026054260642
Am02Am99.91±Am0017054270642
Am002Am9.991±A18054280642
.segnarlla,Am002:porDegatloV

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10. Rated Circuit-To-GroundVoltage*:
(Maximum Common Mode Voltage)
2865: 250 VDC between either input ter-
minal and power line ground
2866: –4.0 to +4.5VDC between the com-
mon (–) input terminal and the
power source common (5 VDC re-
turn)
*The maximum voltage, with respect to ground, which may safely and con-
tinuously be applied to the circuit of an instrument.
11. Conversion:
Technique: Up-Down Integration
Rate: 3 samples per second, nominal
12. Display:
Type: 7-segment, light-emitting diodes
with 0.56" high numerals
Number of Digits: 3 full digits, plus overrange “1” digit
Polarity: Automatic, with “–” indication; “+”
indication implied
Out-of-Range: All digits blank, except “1” digit
Decimal Point: Jumper selectable
13. Power Requirements:
2865: 120 or 240 VAC ±10%, 50 to 400
Hz, 5VA
2866: 5 VDC, ±5% at 200 mA
14. Temperature Range:
Operating: 0°C to +55°C at 0 to 85% relative
humidity, non-condensing
Storage: –40°C to +60°X
15. Reference Conditions:
Temperature: 23°C, ±2°C
Atmospheric Pressure: 575 to 800 mmHg
16. Warm-Up Time: Less than 15 minutes at reference
conditions.
1.3 Theory of Operation
The basic block diagram of both Instruments is shown in Figure 1.The analog-to-
digital conversion is accomplished by the Up-Down Integration technique. All A/
D conversion circuitry is contained in an LSI integrated circuit.These Instruments
convert an analog DC voltage at the input terminals into a corresponding digital
value and polarity which are displayed in numeric form on the 7-segment light-
emitting diode (LED) display. The particular current or voltage range is obtained
by connecting the appropriate attenuator network to the input.

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Figure 1. 2865 and 2866 Block Diagram
2. INSTALLATION
2.1 Panel Mounting Instructions
These Instruments can be mounted on panels ranging from 1/16 to 1/4 inches in
thickness without any modification. To mount the Instrument, proceed as follows:
1. Insert the Instrument through the front panel cutout.
2. Insert a side mounting bracket (10-863122) on each side of the Instrument.
Use the two holes near the bezel shown in Figure 2.
3. Slide the brackets toward the rear of the slots until they lock in place.
4. Turn the screws in each bracket until they firmly contact the panel surface.Do
not over-tighten.
Figure 2. Panel Mounting and Cut-Out Dimensions
2.2 Power Source Requirements
Check that the power designation on top of the case agrees with the power
source to be used.
The Model 2865 is wired at the factory for 120 volts AC operation (see Table 1).
For 240 volt operation, be sure that the power line ground connection of the
INPUT SHUNT/
ATTENUATOR
INPUT
REFERENCE
A/D
LSI LED
DISPLAY
*3.622"
(92mm)
SCREW
SIDE MOUNTING
BRACKET
FRONT PANEL
FRONT PANEL CUT-OUT
PANEL THICKNESS
1/16" to 1/4"
4.27" DEEP
(109mm)
1.93"H
(49mm)
3.9"W
(99mm)
*±.010"
*1.682"
(42.72mm)

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Model 2865 is securely connected to a good earth (power line) ground. Use a
standard 3-wire line cord, and a 3-wire grounded outlet that conforms to the latest
electrical code. All power connections are made to the PC board connector. The
power requirement of the 2865 is approximately 5 VA.The model 2866 is wired for
5 VDC operation, requiring approximately 200 mA.
2.3 Connections
Refer to Figure 3 for the wiring diagram of the Model 2865 or to Figure 4 for the
wiring diagram of the Model 2866.
Do not apply power to the Instrument until all connections are completed.
The signal input connections for the Models 2865 and 2866 are identical. Use
either a twisted pair of leads, or 2-wire shielded cable for low level, high output
impedance circuits.
Once you’ve completed wiring the connector, orient the connector polarizing key
so that it mates with the slot on the PC board and insert the PC connector onto the
PC board.Two No. 4-40 x 5/8" screws are required to permanently attach the PC
connector to the Instrument.
Figure 3. Model 2865, Connector Wiring
Figure 4. Model 2866, Connector Wiring
123456789101112131415
ABCDEFHJK NPRSLM
3RDWIRE
(EARTH)
GROUND TO 120 VAC
50, 60 OR 400
}
NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC
NC NC NC NC NC NC NC NC NC NC
}
INPUT
COMMON
SIGNAL INPUT
+ INPUT
123456789101112131415
ABCDEFHJK NPRSLM
NC NC NC NC NC NC NC NC NC NC NC NC NC NC
NC NC NC NCNC NC NC NC NC NC
}
INPUT
COMMON
SIGNAL INPUT
+ INPUT
NC
KEY
+5V DC
Digital Common
5V DC return
NC

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3. SERVICING INSTRUCTIONS
These servicing instructions are for use by qualified personnel only. To avoid
electrical shock, do not perform any servicing other than that contained in the
operating instructions unless you are qualified to do so.
3.1 Case and Front Cover Removal
Remove all power and connections to the Instrument before removing the case
or replacing the fuse.
The case and front cover can be removed for maintenance purposes as follows:
1. Disconnect the Instrument from the AC power source (2865) or turn power
OFF.
2. Remove the two screws that attach the front cover to the Instrument (when
used) and remove the PC board connector from the rear of the Instrument.
3. Remove the two screws that attach the front cover to the case and pull the PC
board assembly forward out of the case.
3.2 Line Fuse Replacement (2865 only)
1. Remove the case and front cover as described in paragraph 3.1.
2. Carefully lift the defective fuse from the holder and replace with a type 1/8A,
8AG, normal-blow fuse. (The line fuse is located next to the power trans-
former.)
3. Replace the case and front cover.
Figure 5. Rear Connector
!
!
123456789101112131415
ABCDE FHJK NPRSLM
REAR CONNECTOR
POLARIZING KEY

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Table 2. Pin Connector Circuit Identification
Table 3. Items Supplies With the Instrument
Quantity Description Part Number
1 Mounting Bracket10-863122
1 Operator’s Manual 6-114937
1 Connector, PC Board 22990
Viking Industries — Type 2 KV 15 D/1-2-34
US Components — Type UPCR-DIS-CD
Amphenol Corp. — Type 225-21521-101-04
Table 4. Optional Mounting Hardware
Quantity Description Part Number
1 Panel Adapter, DIN, IEC 22992
1 Panel Adapter, Domestic Type 22993
1 Mounting Bracket, Rear (DIN, IEC) 22991
niPnoitpircseDtiucriCniPnoitpircseDtiucriC
A,15682-DNGeriwdr3BCN
6682-CN
3,2CNC 5682-laurteNCA021* 6682-CN
45682-CN 6682-CDV5+DCN
5CNE 5682-hgiHCA021* 6682-CN
6CNF CN
7CNH )MOC-PD(
8CNJ nommoClatigiD 6682-nruterCDV5
9CNK )3.P.D(
01)DLOH/FER–(L)2.P.D(
11)FER+(M )1.P.D(
21CNN CN
31CNP )–(nommoCtupnI
41CNR CN
51CNS )+(tupnI .tnemurtsnIrepnoitpoenoylnO:ETON.snoitpOdetoneD)( "noitcennocon"setoneDCN .noitarepoCAV042rofsnoitcennoclanoitpO*

12
SIMPSON ELECTRIC COMPANY 853 Dundee Avenue
Elgin,IL 60120-3090 [phone] FAX [phone]
Printed in U.S.A. Part No. 06-114937 Edition 4, 3/03
Visit us on the web at: www.simpsonelectric.com