The 5560A from Fluke Calibration lets you calibrate DMMs to 6½. Other models handle fewer digits.
Calibration labs, whether internal to a company or a third-party lab, constantly face pressure to decrease turnaround times while at the same time calibrating to ever-tighter tolerances. The 5560A from Fluke Calibration boosts performance, letting a single instrument calibrate more test instruments. The 5560A comes from a long line of multifunction calibrators. Go into just about any calibration lab and you’ll find a fluke calibrator.
Fluke’s most recent multifunction calibrator line includes two other variants: the 5550A (5½-digit DMMs) and 5540A (½-digit DMMs). Fluke distinguishes the 5560A based on its 4:1 test uncertainty ratio (TUR), which makes it suitable for calibrating 6½-digit multimeters (see photo). If your primary DMM workload revolves lower-resolution meters, then the 5550A is a better match. Finally, the 5540A serves mobile calibration facilities and handles most handheld DMMs.
All three calibrators let you calibrate meters for:
- AC and DC voltage and current (1020 V, 30.2 A) with higher current using an amplifier
- Resistance (0 Ω to 1200 MΩ)
- Frequency ().01 Hz to 2 MHz)
- Capacitance (200 pF to 120 mf
- Indusctance (12 µH to 12 H)
- Thermocouple output (B,C,E,J,K,L,N,R,S,U, BP and XK
- Resistance-temperature detector (RTD) output (Pt100 385, Pt100 395, Pt100 3916, Pt200 385, Pt500 385, Pt1000 385, Ni120, Cu10)
- Sine wave, triangle wave and square wave
Because calibration can be subject to human error or inconsistent procedures, all calibrations in the family can operate under software control through Fluke METCAL software, a third-party calibration program, or in-house-developed calibration software. Operating a calibrator under software control provides consistency, shortens test time, and automated test-data storage. All models allow remote control over RS-232, Ethernet, USB, and GPIB buses.
The 5560A adds new features such as:
- 7 in. (17.8 mm) screen with a graphical interface with color-coded fields;
- 30 A Class D transconductance amplifier;
- New output block design;
- 1000 V direct amplifier;
- Improved thermocouple input/output;
- mechanical/thermal design;
- Redesigned terminal mapping matches the calibrators’ terminal to those of populat DMMs, a simple change the reduces lead changes.
An optional Autocal DMM lead set adapter plugs directly into the calibrator’s output terminals and minimizes, which can, in some cases eliminates lead changes.