Bk-precision 5491B - Manual Manual do Utilizador Página 23
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2. From the front panel, use a screwdriver to rotate the fuse carrier several turns counter-clockwise.
Take the fuse carrier out of the socket.
3. Remove the fuse and replace it with the same type (T1AL, 250V, 5×20mm）.
CAUTION: Do not use a fuse with a higher current rating than specified or instrument may be
damaged. If the instrument repeatedly blows fuses, try to find out the reason before
replacing the fuse.
4. Install the new fuse by reversing the procedure above.
3.4 Measuring Resistance
Model 2831E Resistance measurement range: 200 Ω, 2 kΩ, 20 kΩ, 200 kΩ, 2 MΩ, 20 MΩ; Maximum
resolution: 10 mΩ (on 200 Ω range)
Model 5491B Resistance measurement range: 500 Ω, 5 kΩ, 50 kΩ, 500 kΩ, 5 MΩ, 50 MΩ; Maximum
resolution: 10 mΩ (on 500 Ω range)
3.4.1 Connections
Assuming the multimeter is under factory default conditions, the basic procedure for measuring
resistance is as follows:
1. Connect the test leads between and COM.
2. Select resistance measurement function by pressing
3. Press toggles auto ranging. Notice the AUTO annunciator is displayed with auto ranging. If
you want manual ranging, use the RANGE and keys to select a measurement
range consistent with expected resistance.
4. Connect test leads to the resistance as shown in Figure 3-3:
CAUTION: Do not apply more than 1000 V peak between and COM or instrument
damage may occur.
5. In manual range, if the “OVL.D” message is displayed, press up key to select a higher range
until a normal reading is displayed (or press key for auto ranging). Use the lowest possible
range for the best resolution.
6. Take readings from the display.
- Multimeters 1
- Safety Notice Supplement 2
- Safety Summary 2
- Compliance Statements 4
- Table of Contents 5
- 1.1 Feature Overview 8
- 1.2 Incoming Inspection 8
- Chapter 2 Overview 9
- 2.5 Rear Panel Summary 13
- 2.6 Power up 14
- 2.6.3 Power-up Sequence 15
- 2.6.5 Power-on Defaults 16
- 2.7 Display 17
- 3.1 Preparation 18
- 3.2 Measuring Voltage 18
- DC VOLTAGE SOURCE 19
- AC VOLTAGE SOURCE 19
- 3.3 Measuring Current 20
- AC CURRENT SOURCE 21
- DC CURRENT SOURCE 21
- 3.4.1 Connections 23
- 3.5.2 Gate Time 24
- 3.5.3 Connections 24
- 3.6 Measuring Continuity 25
- 3.7 Testing Diode 26
- 3.8.1 Connections 27
- 3.8.2 Using the 2 28
- parameter display 28
- 3.9 Math Functions 29
- 3.9.2 dB Calculation 30
- 3.9.3 dBm Calculation 31
- 4.1.1 Range 33
- 4.1.2 Relative 34
- 4.2 Trigger Operations 35
- 4.3 MAX / MIN 36
- 4.4 Limit Operations 36
- 4.5 System Operations 37
- 4.5.1 Beeper Control 38
- 4.5.2 Baud rate 38
- 4.5.4 Key Sound 40
- 5.1 USB & RS232 41
- 5.3 Data Format 42
- 6.1 Command structure 43
- 6.2 Command Syntax 43
- 6.2.2 Short-form Rules 45
- 6.3 Command Reference 46
- 6.3.2 FUNCtion subsystem 48
- 6.3.3 VOLTage subsystem 49
- :RANGe Commands 50
- 6.3.4 CURRent subsystem 53
- Speed Commands 57
- 6.3.7 TRIGger subsystem 62
- 6.3.8 FETCH Subsystem 63
- 6.3.9 SYSTem Subsystem 64
- 6.3.10 Common Commands 64
- Chapter 7 Specifications 65
- MODEL 2831E SPECIFICATIONS 66
- DC Voltage 66
- AC Voltage 66
- Math Functions 72
- Remote Interface 72
- General Specifications 72
- SERVICE INFORMATION 73
- LIMITED WARRANTY 74
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