RS Components
Our website uses cookies and similar technologies to provide you with a better service while searching or placing an order, for analytical purposes and to personalise our advertising to you.

Fluke 789, 1A Multi Function Calibrator

7 In stock - FREE next working day delivery available
Add to Basket

Price Each


(exc. VAT)


(inc. VAT)



RS Stock No.:
Mfr. Part No.:

RoHS Status: Not Applicable

COO (Country of Origin):
UnitsPer unit
1 +£1,067.00

Fluke 789 ProcessMeter™

Combining the functionality of a current loop calibrator with the power of a digital multimeter, Fluke's 789 also has the wireless capabilities of Fluke Connect with the IR3000FC module.

Featuring a larger display than the Fluke 787B, it has 2 levels of back-lighting making it twice as bright and easy to read. With a built-in 250 ohm HART® resistor, the need to carry a resistor separately has now been eliminated, and a separate power supply is no longer needed with the 24 volt loop supply. This cleverly designed instrument now allows technicians and engineers to do a lot more in one handy tool. The perfect addition to any test kit for measurement and troubleshooting.

Features and Benefits:

• Displays mA and % of scale simultaneously
• 0.1% dc voltage accuracy
• 0.05% dc current accuracy
• 1200 ohm drive capability on mA source
• 0% and 100% toggle between 4 and 20 mA sourcing
• -20°C to 55°C operating temperature
• 140 hours typical (measurement), 10 hours typical (sourcing 20 mA) battery life


What is a current loop calibrator?

Current loop calibrators are specially designed instruments for current loop trouble shooting, testing and calibration. They can source current on unpowered devices in a loop, simulate the operation of loop powered transmitters and also measure current. These calibrators often feature time saving technology, specialist graphics using digital interfaces and micro-processor based electronics.

How much current flows in each loop of a parallel circuit?

Determined by Ohm's law, which states that the current between 2 points through a conductor is directly proportionate to the voltage across those 2 points, divided by the resistance of the conductor. I = V/R. This is also the case for series and parallel circuits, however in parallel circuits the total current can be affected by the way the resistors have been connected, as well as their ohmic value. Current does divide up and there can be more current in one area over another nonetheless when all areas are added up the total amount is the same.

Buy Fluke products and claim another Fluke product free.
Between September 1, 2020 and December 15, 2020 customer who purchase a Fluke product (inc. Fluke Networks) have the opportunity to claim a free product through the Fluke website with the original proof of purchase, invoice, or receipt. The product can be claimed by visiting the Fluke website - There are six levels of free tools to claim. They are separated based on the value of the qualifying purchase, starting at as little as only £100. For each level there is a fixed range of products to claim, based on the value of the original purchase.

Absolute Maximum Current Measurement1A
Best Accuracy0.2 %
Resolution1 mA
Safety CategoryCAT III 1000 V, CAT IV 600 V
Battery TypeAA
Battery Life140 h
Power SourceBattery
Dimensions203 x 100 x 50mm
Maximum Operating Temperature+55°C
Minimum Operating Temperature-20°C
Model Number p789
Safety Category Voltage600 V, 1000 V
Safety Category LevelCAT III, CAT IV