The mAcal Milliamp Loop Calibrator is an economical, easy to use calibration device for generating and measuring mA signals. The instrument is especially designed for 2-wire transmitter loops with 4-20mA signals and it is available with optional NIST certification.
The unit's compact size and light weight is ideal for field use. Dedicated functions keys located on the front of the device allow for simple, single-hand operation. The keypad provides positive feedback to the user and each key is labeled for easy operation. A large, high-contrast, 5-digit LCD display indicates numeric values in mA, %, V or sec. Resolution is 0.001mA in measurement mode. The user can change the display to read in % of Full Scale. Flow readings are shown in % of Flow. The display also indicates error codes. Alarms may be displayed showing loop mismatch, reverse polarity and overrange. The unit will also display low battery notification message. Plus, the unit is equipped with an automatic shut-off features that prevents accidental battery discharge. A built-in, permanent fuse eliminates the need to replace the fuse in the case of overloads.
The mAcal Loop Calibrator provides loop power control in the range of 0-45V and the instrument may be used to generate a stable 24Vdc supply for the loop. The mAcal Loop Calibrator also reduces the time and complexity often associated with loop calibration. The instrument features special fixed steps for performing linear and flow transmitter or valve positioner calibrations. The instrument has seven different built-in current values, and the user may choose between manual and automatic steps with 10- or 30-seconds between steps. For example, you can perform an entire test by placing the mAcal Calibrator in the process loop and operating from the control room.
The unit comes complete with the mAcal Calibrator, carrying case, two test leads with alligator clips, four batteries (Type LR6, AA) and a User's Guide.