Martel-electronics OEM1B Manuel d'utilisateur télécharger pdf (Page 4)

Specifications liable to change without prior warning OEM 1B Issue 2 September/2002 M.C. Applies to OEM 1B/3

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SCALING

Two resistors Ra and Rb

may be used to alter the

full scale reading (FSR) of

the meter - see table. The

meter will have to be re-

calibrated by adjusting the

calibration potentiometer

on the rear of the module.

FSR Ra Rb

2V 910k 100k

20V 1M 10k

Vin 200V 1M 1k

2000V* 1M 100R

200 A 0R 1k

2mA 0R 100R

Iin 20mA 0R 10R

200mA 0R 1R

Voltage

Current

IHI

Vin or inI

ILO

OEM 1B

*Ensure that Ra is rated for high voltage use.

APPLICATIONS

Do not connect more than one meter to the same power supply if the meters cannot use the same signal

ground. Taking any input beyond the power supply rails will damage the meter.

OEM 1B

3½ Digit LCD Voltmeter Module

www.lascarelectronics.com

Measuring a floating voltage

source of 200mV full scale.

Split supply operation.

Measuring a supply voltage.

(min. 7.5V, max. 14V).

Measuring current.

Supply MUST be isolated.

COM

RLO

IHI

ILO

V-

V+

SUPPLY

VOLTAGE

510K

10K

510K

±200mV

IHI

ILO

V-

COM

RLO

V+

COM

RLO

V-

V+

IHI

ILO

R=0.2

FSR

±200mV

1.6V

min.

IHI

ILO COM

RLO

V-

V+

V-

V+

14V max

7V min

Measuring 4-20mA to read 0-999.

Supply MUST be isolated.

V-

V+

6R2

SET

ZERO

100K

IHI

ILO

COM

OUT

V-

V+

RLO

PO Box 770, Londonderry, NH 03053 1-800-821-0023

www.martelcorp.com

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