overview
The programmable digital voltmeter has the following functions and features:
The full-scale display value, upper and lower limit alarm values, and communication address can be freely set through the buttons on the panel, making it very flexible and convenient to use.
● Optional analog transmission output, 4-20mA, 0-20mA, 4-12-20mA, 0-5V, 1-5V optional.
● Optional 2-channel alarm output for monitoring the upper and lower limits of the measured parameters.
Optional RS485 digital interface, using standard MODBUS-RTU protocol.
Adopting direct communication RMS effective value measurement, digital zero calibration, digital tuning, high accuracy, and extremely high cost-effectiveness.
TECHNICAL INDEX

transport enter	electricity press	RATING	AC100V, AC220V, AC400V (special customization is available)
		overload	Duration: 1.2 times Instantaneous: 2 times/10 seconds
		power consumption	＜ 1VA (per phase)
		impedance	＞500KΩ
		accuracy	RMS measurement, accuracy levels 0.1 and 0.2
power supply	scope of work		AC 220V ± 20% Special requirements can be customized
	power consumption		＜5VA
output	Digital Interface		RS-485, MODBUS-RTU protocol (optional)
	Switching Output		Switch output, relay passive contact mode (optional)
	analog output		Analog transmission output, 4-20mA/0-20mA/4-12-20mA/0-5V/1-5V (optional)
environment	work environment		-10-55 ℃, relative humidity<85%. Non corrosive gas environment, altitude<2000m
	Environment		-55-85 ℃, relative humidity<85%
secure	pressure resistance		Power supply/output>1KV
	isolation		Input, output, and power supply to the chassis>100M Ω

List of Frequency Meter Series Models and Sizes

model	measure	display	Appearance and installation dimensions							Peripheral functions (optional, to be specified when ordering)
			A	B	C		D	E		digital communication	Switch Module		Transmission output
HL-42XHz	Single-phase active power	LED	120	120	73		112	112		RS-485	4DI/4DO
HL-96XHz	Single-phase active power	LED	96	96	65		92	92		RS-485	4DI/4DO
HL-80XHz	Single-phase active power	LED	80	80	67		76	76		RS-485	2DO
HL-72XHz	Single-phase active power	LED	72	72	67		68	68		RS-485	2DO
HL-45XHz	Single-phase active power	LED	48	48	79		45	45
HL-48XHz	Single-phase active power	LED	49	97	66		91	45		RS-485	2DO