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When and why should you upgrade your 5700A or 5720A calibrator?

Upgrade Fluke 5700A to 5730A

I am always happy when I talk to customers who have been using a 5720A or even a 5700A calibrator for years, and they tell me they really depend on it and are happy with its performance. But now when I see one of those older calibrators in a lab – especially if that lab is using it as their calibration standard that gives them their scope of accreditation – I have to recommend replacing those calibrators with a new 5730A. In this post I want to explain why I am recommending that and also why this is a great time to upgrade.

The number one reason I recommend replacing a 5700A or 5720A is that their extended repair support period is going to end on June 30, 2020 due to severe parts availability. This date is beyond the five years of extended support Fluke Calibration offers after discontinuing a product’s manufacture.

Consider the risk

Let’s say your unit fails. You send it in, and maybe you find out it is not repairable. Now you have lost time for shipping and evaluation and you have to get a quote for a new calibrator, you have to get approvals for the expense, then order it and wait for delivery. You could be down months without a calibrator. Are you willing to sustain that level of risk? If I visit your lab and see that you are using a 5720A or 5700A as your standard, that’s the kind of thinking I’ll encourage you to do.

Some people have good technicians so they think they can do the repairs in-house. Let me tell you that if you are not repairing 5700A Series calibrators all the time and don’t understand them well, there’s risk there too. You might think you got something working but you might have affected some other part of the performance.

Fluke 5730A Calibrating a Bench Meter

5730A Multifunction Calibrator improvements

Now here’s some good news. The 5730A has a lot of improvements that I believe will benefit you and the people in your lab.

User interface
I love the new user interface. Usually you can get to anything you want to do with just three keystrokes or touches.

Visual Connection Management
Then there is the Visual Connection Management feature where the outposts light up. For example, you’re doing a 2-wire voltage output the High and the Low light up. But if you’re in a 4-wire like a resistance measurement, all four – the sense and the output terminals light up. These are error-proofing features that help out the newer technicians who are still learning the equipment.

Automatic power sensing
Another error-proofing feature is automatic power sensing. If you plug in a 5730A you don’t have to worry about it being set to the wrong voltage. So if you are in the United States and have it running on 120 V and then you send it to a manufacturing plant overseas where they use 250 V, they won’t blow it up if they forget to change the voltage. That’s just one less thing to worry about.

The basics are still there
The 5730A still works like a 5720A, with the keyboard and how you enter the data. But you’ve got better specifications, an easier-to-use interface and it’s also supportable.

Supportability is key
We’re using current technology so we’re not going to run into problems with components going out of availability. We made major changes to the internal circuit boards so they can be supported for years to come.

Using a Fluke 5730A with MET/CAL Software

Using MET/CAL with 5720A procedures
The 5730A is backwards compatible, so if you are using MET/CAL software you can still run your 5720A procedures in emulation mode.

Easier data collection
If you ran an Artifact Calibration or a Cal Check on a 5720A or 5700A it was kind of a pain to pull the data. Now you just put your memory stick into the 5730A USB port and pulling the data is easy. It’s in .csv data format and you can just plug it into your computer and the data is there for you.

Specification display
The 5730A has a full time specification display. At the very top of the display, if you touch it along the top edge, it’ll show the specification and now it’s dependent on how you set it. If you are running on a one-year spec with 95% confidence, it will show you that. You can adjust it so if you are running on a 90-day spec you can set it to that. You could do that before but it’s easier now. And if you don’t need that feature you can hide it with a touch of your finger.

Improved output adjustment dial
Here’s a little improvement that I really like. The dial to adjust the output has been improved – it’s rubberized and coated and it seems to me that it works better.

Using 5730A with an amplifier
The 5730A works in closed loop with the 52120A amplifier. The 52120A will work with any of our electrical calibrators but if you want that closed loop with the improved specification and you want to control the amplifier from the calibrator, you need the 5730A. The 5720A, 5700A or even the 55XXA can all be the source but they won’t control the 52120A and there’s no feedback loop for the better uncertainty.

The 5730A also still works with the 5725A amplifier as well. (Note, you might have to do some updates if you have a very old 5725A).

Save up to 20% on a new 5730A calibrator

We’re running a trade-in program where you can save 10% to 20% off the price of a new 5730A if you trade in an old 5700A or 5720A. And you can keep those older instruments for 30 days and run the new 5730A alongside them to collect data and make comparisons.

5730A versus 5700A/5720A: Model-to-model comparison

  5700A
 
5720A
 
5730A
 
Functionality
 
 
DC Voltage
 
 
Range
 
0 to ± 1100 V
Best 1 Year, 95% Specification
 
7 ppm + 3.5 µV 3.5 ppm + 2.5 µV 3.5 ppm + 2.5 µV
AC Voltage
 
 
Range
 
220 mV to 1100 V
10 Hz to 1 MHz
Best 1 Year, 95% Specification
 
75 ppm + 6 µV 45 ppm + 8 µV 42 ppm + 8 µV
DC Current
 
 
Range
 
0 to ± 2.2 A
Fluke 5725A: 0 to ±11 A
Fluke 52120A: 0 to ± 100 A
Best 1 Year, 95% Specification 50 ppm + 8 nA 35 ppm + 7 nA 35 ppm + 7 nA
AC Current  
Range 9 µA to 2.2 A, 10 Hz to 10 kHz
Fluke 5725A: 9 µA to 11 A
Fluke 52120A: 9 µA to 120 A
Best 1 Year, 95% Specification
 
140 ppm + 16 nA 120 ppm + 8 nA 103 ppm + 8 na
Resistance
 
 
Range
 
0 to 100 MΩ, 18 values in x1 and x1.9
Best 1 Year, 95% Specification
 
12 ppm 8.5 ppm 6.5 ppm
Wideband option
 
 
Range
 
300 µV to 3.5 V, 10 Hz to 30 MHz
Best 1 Year, 95% Specification
 
± 0.4% of setting ±0.4% of setting ±0.4% of setting
User Interface/ Display/ Ergonomics
 
 
6.5-inch Touchscreen Display
 
No No Yes
Visual Connection Management Terminals
 
No No Yes
Soft Touch Ergonomical Handles
 
No No Yes
Local Language Support
 
No No Yes
Connectivity
 
 
Copper Alloy Terminals
 
Yes
 
USB Cal Check Data Storage
 
No No Yes
Phase Lock In and Output
 
Yes
 
IEEE Interface
 
Yes
 
RS-232 Interface
 
Yes
 
USB Bus
 
No No Yes
Ethernet Port
 
No No Yes
Hardware
 
 
Soft Power (Mains Power Sensing)
 
No No Yes
Redesigned PCAs
 
No No Yes
Amplifier Support / Ports
 
 
52120A
 
No No Yes
5725A
 
Yes
 
Options
 
 
Wideband Option
 
Yes
 
Rear Output Option
 
Yes Yes No
Support
 
 
Artifact Cal
 
Yes
 
Cal Check
 
Yes
 

 

Related Resources and Products

We buy old calibrators trade-in promotion

5730A High Performance Multifunction Calibrator product information

End of service notice: 5700A and 5720A

Marty Kidd, Sales Engineer at Fluke Calibration
Posted by Marty Kidd on jun 01, 2020
Marty has worked in the Metrology field for 37 years. His experience consists of almost 10 years in USAF PMEL, one year in a small third party calibration lab, then 12 years as a calibration tech/lead, Lab Supervisor, and Service Center Manager of the Fluke WW Service Center in Everett, WA. He... Full Bio
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