Yokogawa MLX Loop Powered Process Indicator Specifications

FUNCTIONAL SPECIFICATIONS
Input: 4-20mA DC 2-wire
Voltage Drop: 3.5V at 20mA
LCD Display
Numerical: Six 7-segment digits
Alpha-numerical: Six 14-segment characters
Bar graph: 20-segment Bar graph.
Symbols: P, SP, T, F, %, √, x10, x100, x1000
Configuration: User configurable for desired engineering units.
Method: User configurable from front panel
Zero & Span: Zero and span can be set between ±999999.
Turn-on Time: 12 second (includes power on self-test and memory integrity check)
Update Time: 1 second
Isolation: Input/Output/Ground isolated to 500V DC
 
PERFORMANCE SPECIFICATIONS
Accuracy: ± 0.05% of full scale +1 digit
Operating Current: 3.6mA to 28mA
Ambient Temperature: -40 to +80°C (-40 to 176°F)
Ambient Humidity: 0 to 100%RH at 23°C (73°F)
Ambient Temperature Effect: 0.1°C per 10°C
Over range: 200mA without damage
Maximum error: +0.02%, -0.03% (of full scale)
Conformity (Linearity): 0.03%
Hysteresis error: 0.03%
Repeatability: 0.03%
Vibration: 3G @ 10-150Hz
Shock: 50G
Explosion Protection: FM, CSA, ATEX, and IEC (see chart below)
 
PHYSICAL SPECIFICATIONS
Enclosure Material
Housing: Low copper cast aluminum alloy with Polyurethane resin baked finish - Deep sea moss green (equivalent of Munsell 0.6GY3.1/2.0) or SUS316 cast stainless steel (ASTM CF-8M)
Name plate: Black anodized aluminum or 316 SST
Tag: 304 SST
Wired tag: 304 SST
Degrees of Protection: NEMA 4X, IP67
Mounting: Nominal 2” (50mm) pipe mount or surface. (horizontal or vertical)
Weight: 1.25kg (2.70 lbs): Without mounting bracket. Add 0.8 kg (0.35 lbs) for mounting bracket
Electrical Connection: ½ NPT female or M20 female
 
FEATURES
User interface
A front panel push button switch combined with four touch switches allows easy configuration of the indicator (calibration, span, zero and engineering units).
Root extraction
For applications where the process variable is non-linear and based on the square root, 3/2 root or 5/2 root, the MLX can be configured to display the root function of the input.
Field Configurable
Via the front panel user interface, the process variable parameters can be modified as desired in the field.
LCD Display features
The LCD display includes a bar graph for an analog indication of the process variable magnitude. The 6 digit display and 6 character display (combined with several symbols) give an instant view of all process variable parameters. A menu system allows customizing parameters such as decimal point position, engineering units, status of symbols and state of bar graph.
Self-diagnostics
Built-in diagnostics operate at power-up and during operation for ease of maintenance and troubleshooting.
EMC Conformity Standard: EN61326-1 Class A, Table 2

Explosion Protection Options

MLA - MLD - MLX Comparison Chart