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Fluke 2625A Other
Manufacturer:
Model:
2625A
Date:
1990
Class:
Type:
SubType:
Data Acquisition Unit
Information
The 2620A Hydra Series II Data Acquisition Unit is a multi-channel data acquisition unit able to measure ac and dc voltages, temperature via thermocouples and RTDs, resistance, and frequency. It features 21 measurement channels, 8 digital input/output lines, a Totalizer input, and 4 alarm output lines. The Data Acquisition Unit is easily carried by hand and can be ac or dc powered. The user can choose communications with a host computer over an RS-232 (standard) or IEEE-488 (2620A/05) computer Interface. The 2620A comes with a removable Universal Input Module that enables fast, convenient set-up and reconfiguration. Any combination of dc voltage, ac voltage, thermocouple, RTD, resistance, or frequency measurements can be connected to the input module without the need for additional signal conditioning. Thermocouple reference junction compensation is automatically performed by sensing the temperature of the input module's isothermal block. Features: Channel Scanning: can be continuous scanning, scanning at an interval time, single scans, or triggered (internal or external) scans Channel Monitoring: make measurements on a single channel and view these measurements on the display Channel Scanning and Monitoring: view measurements made for the monitor channel while scanning of all active channels continues Multi-Function Display: Left (numeric) display shows measurement readings; also used when setting numeric parameters; Right (alphanumeric) display used for numeric entries, channel number selection and display, status information, and operator prompts Front-Panel Operation Measurement Input Function and Range: Volts dc (Vdc), dc voltage ranges 300 mV, 3 V, 30 V, 300 V Volts ac (Vac), ac voltage ranges 300 mV, 3 V, 30 V, 300 V Frequency (Hz), 15 Hz to 1 MHz Resistance (Ω), resistance ranges: 300 Ω, 3 kΩ, 30 kΩ, 300 kΩ, 3 MΩ, 10 MΩ Temperature Measurement: Thermocouple types J, K, E, T, N, R, S, and B, and Hoskins Engineering Co. type C are supported. Also, DIN/IEC 751 Platinum RTDs are supported Totalize Events on the Totalizing Input Alarm Limits and Digital Output Alarm Indication 4-Terminal Resistance Measurements (Channels 1 through 10 only) RS-232 Computer Interface Operation Measurement Rate Selection Nonvolatile Memory: Storage of minimum, maximum, and most recent measurements for all scanned channels. Storage of Computer Interface setup, channel configurations, and calibration values. RS-232 Interface (IEEE-488 available with option 05) 90 to 264 Vac, 50 or 60 Hz operation; or 9.0 to 16 Vdc Weight: 7 lb; Size: 93 mm (3.67 in)H x 216 mm (8.5 in)W x 312 mm (12.3 in)D

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Datasheet
Manual type:
Datasheet
Pages:
12
Size:
186.46 Kbytes (190940 Bytes)
Language:
english
Revision:
C
Manual-ID:
1264012
Date:
March 2002
Quality:
Electronic document, no scan, very well readable.
Upload date:
29 November 2014
MD5:
46237362669f2b7f0620eacb4636484d
Downloads:
757
User Manual
Manual type:
User Manual
Pages:
196
Size:
7.12 Mbytes (7464791 Bytes)
Language:
english
Revision:
4
Manual-ID:
885988
Date:
October 1993
Quality:
Scanned document, all readable.
Upload date:
08 February 2016
MD5:
8d65143a9dfbc268698139c8b33796b3
Downloads:
347
Information
1 INTRODUCTION ... 1-1 THE Hydra DATA ACQUISITION UNIT ... 1-1 THE Hydra DATA LOGGER ... 1-1 OPTIONS AND Accessories ... 1-1 Applications Software ... 1-1 IEEE-488 Interface Assembly ... 1-3 Connector Set (2620A-100) ... 1-3 Accessories ... 1-3 WHERE TO GO FROM HERE ... ' ... 1-3 2 OVERVIEW ... 2-1 INTRODUCTION ... 2-1 SETTING UP THE INSTRUMENT ... 2-1 Unpacking and Inspecting the Instrument ... — ... 2-1 Adjusting the Handle ... 2-1 Line Power ... 2-2 Front / Rear Panel Features ... 2-2 Input Channels ... 2-7 OPERATING MODES ... 2-7 TURNING THE INSTRUMENT ON ... 2-8 FRONT PANEL DISPLAY ... 2-8 READING THE DISPLAY ... 2-8 Left Display ... 2-9 Right Display ... 2-9 Specific Annunciators ... 2-9 FRONT PANEL BUTTONS ... 2-9 Selecting a Channel ... 2-9 Using the Buttons ... 2-9 SETTING UP A CHANNEL ... 2-11 SETTING ALARM LIMITS AND Mx+B SCALING VALUES ... 2-13 Alarm Limits ... 2-13 Mx+B Scaling ... 2-14 SETTING THE SCAN INTERVAL ... 2-15 USING THE MONITOR FUNCTION ... 2-15 USING THE SCAN FUNCTION ... 2-16 REVIEWING CHANNEL DATA ... 2-16 VIEWING THE TOTALIZER COUNT ... 2-17 USING EXTERNAL DC POWER ... 2-17 USING THE RACK MOUNT KIT ... 2-17 3 OPERATING THE INSTRUMENT FROM THE FRONT PANEL ... 3-1 INTRODUCTION ... 3-1 OPERATING MODES ... ; ... 3-1 OTHER DISPLAYED DATA ... 3-1 WHAT IS THE PRESENT CONFIGURATION? ... 3-2 If Power is Interrupted ... 3-2 If the Configuration is Reset ... 3-3 CHANNEL CONFIGURATION ... 3-3 Selecting Channel, Function, and Range ... 3-4 Setting Alarms ... 3-7 ALARM LIMITS ... 3-7 ALARM INDICATIONS ... 3-9 RESETTING ALARM CONDITIONS ... 3-10 Using the Digital I/O Lines ... 3-10 Mx+B Scaling ... — ... 3-11 INSTRUMENT CONFIGURATION ... 3-13 Entering and Changing Numeric Values ... 3-13 Selecting the Measurement Rate ... 3-14 Selecting Scan Interval ... 3-14 Triggering ... 3-15 External Triggering ... 3-15 Changing the Temperature Unit ... 3-15 Setting Date and Time of Day ... 3-16 MEASUREMENT CONNECTIONS ... 3-16 DC Volts, AC Volts, Frequency, and Thermocouples ... 3-16 Resistance and RTD ... 3-17 TOTALIZING ... 3-20 General ... — ... 3-20 Connections ... 3-20 REVIEW ARRAY ... 3-21 LIST BUTTON FUNCTIONS ... 3-22 AUTOPRINT ... 3-23 MEMORY STORAGE ... 3-23 FRONT PANEL LOCKOUT FUNCTIONS ... 3-24 Front Panel Review Only Function ... 3-24 Front Panel Monitor Only Function ... 3-25 Computer Interface-Initiated Lockouts - · ... - — 3-25 REM ANNUNCIATOR ... 3-25 CALIBRATION ... 3-26 4 USING THE COMPUTER Interface ... 4-1 INTRODUCTION ... 4-1 Front Panel and Computer Interface Operations ... 4-1 Types of Computer Interface ... 4-2 USING THE RS-232 COMPUTER INTERFACE ... 4-2 Setting Communication Parameters (RS-232) ... 4-2 Autoprint and Memory Storage (RS-232) ... 4-3 AUTOPRINT: COMPUTER Interface CONTROL ... 4-4 AUTOPRINT: OUTPUT FORMAT ... 4^ MEMORY STORAGE: COMPUTER Interface CONTROL 4-5 MEMORY RETRIEVAL ... 4-5 MEMORY FULL OPERATION ... 4-6 CLEARING MEMORY ... 4-6 Cabling the Instrument to a Host or Printer (RS-232) ... 4-6 Installation Test ... 4-7 RS-232 Information ... 4-7 CHARACTER ECHOING ... 4-7 CHARACTER DELETION ... 4-7 DEVICE CLEAR USING CTRL C ... 4-7 RS-232 PROMPTS ... 4-8 Sample Program Using the RS-232 Computer Interface ... 4-8 USING THE IEEE-488 Interface ... 4-8 IEEE-488 Operating Limitations ... 4-8 Installing the IEEE-488 Interface ... 4-8 Enabling the IEEE-488 Interface ... 4-11 Installation Test ... 4-12 IF THE TEST FAILS ... 4-13 GENERAL INFORMATION (RS-232 AND IEEE-488) ... 4-13 How the Instrument Processes Input ... 4-13 INPUT STRINGS ... 4-13 INPUT TERMINATORS ... 4-14 TYPICAL INPUT STRINGS ... 4-14 SENDING NUMERIC VALUES TO THE INSTRUMENT (RS-232/IEEE-488) ... 4-16 SENDING INPUT STRINGS TO THE INSTRUMENT ... 4-16 How the Instrument Processes Output ... 4-16 Service Requests (IEEE-488 only) and Status Registers ... 4-17 EVENT STATUS AND EVENT STATUS ENABLE REGISTERS 4-18 STATUS BYTE REGISTER ... 4-18 READING THE STATUS BYTE REGISTER ... 4-18 SERVICE REQUEST ENABLE REGISTER ... 4-21 INSTRUMENT EVENT REGISTER ... 4-21 COMPUTER Interface COMMAND SET ... 4-22 5 ADDITIONAL CONSIDERATIONS ... 5-1 INTRODUCTION ... 5-1 MEASUREMENT RATE ... 5-1 ADVANCED TRIGGER MECHANISMS ... 5-1 Front Panel Trigger Control ... 5-2 Computer Interface Trigger Control ... 5-2 Both External and Monitor Alarms Disabled (Type 0) ... 5-2 External Trigger Enabled (Type 1) ... 5-3 Monitor Alarm Enabled (Type 2) ... 5-3 THERMAL VOLTAGES ... 5-5 WHEN MEASURING RESISTANCE (Π) OR TEMPERATURE (RTD) 5-5 TRUE RMS MEASUREMENTS ... 5-6 Effects of Internal Noise in AC Measurements ... 5-6 Waveform Comparison (True RMS vs Average Responding) ... 5-8 MAKING MIXED MEASUREMENTS ... 5-8 USING SHIELDED WIRING ... 5-10 General Rule ... — 5-10 Alternate Suggestions ... 5-10 NON-ISOLATED Sensor CONFIGURATION ... 5-10 In More Detail ... 5-11 6 MAINTENANCE ... 6-1 INTRODUCTION ... 6-1 CLEANING ... 6-1 LINE FUSE ... 6-1 SELF-TEST DIAGNOSTICS AND ERROR CODES ... 6-1 PERFORMANCE TESTS ... 6-2 Accuracy Verification Test ... 6-5 Channel Integrity Test ... 6-5 Thermocouple Measurement Range Accuracy Test ... 6-7 4-Terminal Resistance Test ... 6-8 Thermocouple Temperature Accuracy Test ... 6-9 Open Thermocouple Response Test ... 6-11 RTD Temperature Accuracy Test ... 6-11 RTD TEMPERATURE ACCURACY TEST (DECADE RESISTANCE SOURCE) ... 6-11 RTD TEMPERATURE ACCURACY TEST (DIN/IEC 751) ... 6-13 Digital Input/Output Verification Tests ... 6-14 DIGITAL OUTPUT TEST ... 6-14 DIGITAL INPUT TEST ... 6-15 'ΤΛ'Τ'Α T ΤΠΤ’Π'Π TrPT / 1 r TOTALIZER TEST ... 6-16 TOTALIZER SENSITIVITY TEST ... 6-17 Dedicated Alarm Output Test ... 6-18 External Trigger Input Test ... 6-20 CALIBRATION ... 6-21 VARIATIONS IN THE DISPLAY ... 6-21 SERVICE ... 6-22 APPENDICES A. Specifications ... A-l B. ASCII/IEEE-488 Bus Codes ... B-l C. IEEE-488.2 Device Documentation Requirements ... C-l D. Service Centers ... D-l E. Making Mixed Measurements ... E-l F. Binary Upload of Logged Data (LOG_BIN?) ... F-l INDEX INDEX-1

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