Equipment information

Keithley 1788 Digital multimeter
Manufacturer:
Model:
1788
Date:
1978
Category:
Group:
Description:
Battery Pack

Information

INTRODUCTION The Keithley Mode! 177 Microvolt DMM is a versatile, highly sensitive Digital multimeter which is used for measurement of DC and AC voltages, DC and AC currents, as well as resistance. For a complete summary of ranges for each of these five functions, refer to the specifications at the front of this manual. Ranges and functions are easily selected with front panel pushbuttons, while connections for ail functions are easily made with a single set of front panel input terminals. model 177 FEATURES 1. 4 1/2 Digit LED Display—An easy to read 4 1/2 digit display shows 20,000 counts of information with automatic polarity indication. 2. 1µV/1mΩ Resolution—The model 177 is capable of reading DC voltages as low as 1µV and resistances down to 1mΩ. 3. Front Panel Zero—The front panel zero control may be used to compensate for thermal offsets or lead resistance when making measurements. 4. Analog Output—An analog output of 1V/10,000 counts is available on the rear panel.

show more

Service and User Manual
Manual Type:
Service and User Manual
Pages:
54
Size:
2.68 Mbytes (2805020 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
24 February 2008
MD5:
7d861578956a524c2d516a297378939b
Downloads:
2768

Information

Instruction Manual

show more

Service and User Manual
Manual Type:
Service and User Manual
Pages:
54
Size:
3.00 Mbytes (3144607 Bytes)
Language:
english
Revision:
Manual-ID:
29683
Date:
01 January 1978
Quality:
Scanned document, all readable.
Upload date:
21 August 2018
MD5:
e1193fa91e47378f40956bfa45200780
Downloads:
556

Information

SECTION 1 —GENERAL INFORMATION 1.1 Introduction ... 1-1 1.2 Model 177 Features ... 1-1 1.3 Warranty Information ... 1-1 1.4 Manual Addenda ... 1-1 1.5 Safety Symbols and Terms ... 1-1 1.6 Safety Precautions ... 1-1 1.7 Specifications ... 1-1 1.8 Unpacking and Inspection ... 1-2 1.9 Scope of model 177 Instruction Manual ... 1-2 1.10 Optional Accessories ... 1-2 1.10.1 PowerOptions ... 1-2 1.10.2 Cables and Connectors ... 1-2 1.10.3 Probes and Shunts ... 1-2 1.10.4 Carrying Case and Rack Mount ... 1-2 1.10.5 Output Options ... 1-2 SECTION 2-OPERATION 2.1 Introduction ... 2-1 2.2 Safety Precautions for High Energy Circuits ... 2-1 2.3 Preparation for Use ... 2-1 2.4 Operation on Line Power ... 2-1 2.5 Operation on Battery Pack Power ... 2-1 2.6 Battery Charging ... 2-1 2.7 Operating Instructions ... 2-3 2.8 Zero Adjustment ... 2-3 2.9 DC Voltage Measurement ... 2-3 2.10 AC Voltage Measurement ... 2-5 2.11 Resistance {S2) Measurement ... 2-6 2.12 DC Current Measurement ... 2-7 2.13 AC Cu rre nt M easu rement ... 2-7 2.14 TRMS Measurements {AC + DC) ... 2-8 2.15 Analog Output ... 2-8 2.16 Tilt Bail Adjustment ... 2-8 SECTION 3-PERFORMANCE VERIFICATION 3.1 Introduction ... 3-1 3.2 Recommended Test Equipment ... 3-1 3.3 Environmental Conditions ... 3-1 3.4 Performance Verification Procedure ... 3-1 3.4.1 Initial Conditions ... 3-1 3.4.2 DC Voltage Accuracy Check (2V to 1200V Ranges) ... 3-1 3.4.3 DC Voltage Accuracy Check (20mV and 200mV Ranges) ... 3-2 3.4.4 AC Voltage Accuracy Check ... 3-2 3.4.5 Resistance (Q Accuracy Check) ... 3-2 3.4.6 DC Current Accuracy Check ... 3-3 3.4.7 Analysis ... 3-3 SECTION 4-THEORY OF OPERATION 4.1 Introduction ... 4-1 4.2 Overall Operation ... 4-1 4.2.1 Signal Conditioning ... 4-1 4.2.2 A/ D Converter ... 4-2 4.2.3 Range Switching ... 4-2 4.3 AC Converter ... 4-2 4.3.1 Scaling ... 4-2 4.3.2 AC Conversion ... 4-2 4.3.3 AC Current Measurements ... 4-2 4.4 DC Signal Conditioning ... 4-2 4.4.1 Input Attenuation ... 4-3 4.4.2 Chopper ... 4-3 4.5 Ohms Conversion ... 4-4 4.5.1 Floating Current Source ... 4-4 4.5.2 Chopper ... 4-4 4.5.3 Adjustments and Input Overload Protection ... 4-4 4.6 Analog Output ... 4-4 4.7 Clock ... 4-4 4.8 A/D Converter ... 4-4 4.8.1 Auto-Zero ... 4-5 4.8.2 Signal-lnterface ... 4-5 4.8.3 Reference-Integrate ... 4-5 4.9 Display ... 4-6 4.10 AC Power Supply ... 4-6 4.11 Model 1788 Battery Pack ... 4-6 4.11.1 Battery Charging Circuit ... 4-6 4.11.2 Battery Operation and Shutdown Circuit ... 4-6 SECTION 5-MAINTENANCE 5.1 introduction ... 5-1 5.2 Recommended Test Equipment ... 5-1 5.3 Environmental Conditions ... 5-1 5.4 Calibration Procedure ... 5-1 5.4.1 Calibration Shield Installation ... 5-1 5.4.2 Warm-Up ... 5-1 5.4.3 Calibration Instructions ... 5-1 5.5 Troubleshooting ... 5-2 5.6 Troubleshooting Procedure ... 5-2 5.6.1 Calibration Shield/Battery Pack Removal ... 5-2 5.6.2 Line Power ... 5-4 5.6.3 Battery Power ... 5-4 5.6.4 Display and A/D Converter ... 5-4 5.6.5 AC Converter ... 5-4 5.6.6 Chopper Amplifier and Ohms Source ... 5-4 5.6.7 Current Shunts ... 5-4 5.7 Front Panel ZERO Knob Removal and Replacement ... 5-4 5.8 Fuse Replacement ... 5-5 5.9 Model 1788 Battery Pack Installation ... 5-6 SECTION 6—REPLACEABLE PARTS 6.1 Introduction ... 6-1 6.2 Parts List ... 6-1 6.3 Ordering Information ... 6-1 6.4 Factory Service ... 6-1 6.5 Component Location Drawings ... 6-1 6.6 Schematic Diagrams ... 6-1 6.7 Maintenance Kit ... 6-1

show more

Add Comment

* Required information
1000
Captcha Image

Comments

No comments yet. Be the first!