User's Manual
Table Of Contents
- 45 Dual Display Multimeter
- 1. Introduction
- 2. Getting Started
- 3. Operating the Meter From the Front Panel
- 4. Applications
- 5. Operating the Meter Using the Computer Interface
- Introduction
- Preparing the Meter for Operations via the RS-232 Interface
- Preparing the Meter to be Operated via IEEE-488 Interface
- Getting Started With An Installation Test
- How the Meter Processes Input
- How the Meter Processes Output
- Triggering Output
- Service Requests (IEEE-488 Only and Status Registers
- Computer Interface Command Set
- IEEE-488 Capabilities and Common Commands
- Function Commands and Queries
- Function Modifier Commands and Queries
- Range and Measurement Rate Commands and Queries
- Measurement Queries
- Compare Commands and Queries
- Trigger Configuration Commands
- Miscellaneous Commands and Queries
- RS-232 Remote/Local Configurations
- Sample Program Using the RS-232 Computer Interface
- Sample Programs Using the IEEE-488 Computer Interface
- 6. Maintenance
- Appendices

45
Users Manual
Open Circuit Voltage
3.2 V maximum
Continuity Capture Time
50 us maximum, 10 us typical
Input Protection
500 volts dc or rms ac
Note
When the meter is set to measure frequency and there is no input signal
(i.e., input terminals are open), the meter may read approximately 25 kHz
(rather than the expected zero). This is due to internal capacitive pickup of
the inverter power supply into the high-impedance, input circuitry. With
source impedance of <2 k
Ω
, this pickup will not affect the accuracy or
stability of the frequency a reading.
Frequency
Frequency Range
5 Hz to >1 MHz
Applicable Functions
Volts ac and Current AC
Resolution
Range
Slow & Medium Fast
Accuracy
1000 Hz
10 kHz
100 kHz
1000 kHz
1 MHz*
.01 Hz
.1 Hz
1 Hz
10 Hz
100 Hz
.1 Hz
1 Hz
10 Hz
100 Hz
1 kHz
05% + 2
.05% + 1
.05% + 1
.05% + 1
Not Specified
* Specified to 1 MHz, but will measure above 1 MHz.
Sensitivity of AC Voltage
Frequency Level (sine wave)
5 Hz-100 kHz
100 kHz - 300 kHz
300 kHz - 1 MHz
Above 1 MHz
30 mV rms
100 mV rms
1 V V rms
Not specified
Sensitivity Level of AC Current
Frequency Input Level
5 Hz-20 kHz
45 Hz-2 kHz
100 mA
10 A
>3 mA rms
>3 A rms