Features

The DPM 742-BL gives an accurate, zero adjusted indication of a 4-20mA current. Calibration is by two multi-turn potentiometers which allow sensitive adjustment of the instrument over a very wide range. Decimal points are jumper link selectable. A low drift bandgap reference circuit ensures accurate readings over a wide temperature range. LED backlighting ensures excellent readability under low light conditions. Connection is via screw terminals. This module is supplied with a plastic mounting bezel. A waterproof seal to IP67 / NEMA 4X is achievable, using the optional BEZ 700-IP metal bezel. This is a popular part, normally stocked in high quantity and suitable for new designs.

Specification	Min.	Typ.	Max.	Unit
Accuracy (overall error) *	0.05		0.1	% (±1 count)
Linearity			±1	count
Sample rate		2.5		samples/sec
Operating temperature range	0		50	°C
Temperature stability		200		ppm/°C
Loop volt drop	5	5.6		V d.c.
Supply current	4		20	mA
Backlight supply voltage	4.75	5.0	**	V d.c.
Backlight supply current @ 5V d.c.		30	50***	mA
Full scale reading (@20mA)	0		1999	Count
Offset adjustment range	-1900		+1900	Count

* To ensure maximum accuracy, re-calibrate periodically
** An external resistor is required above 5V, see Applications section of the data sheet
*** This specification linearly derates to 30mA @ 50°C