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SECTION 6.SECTION 6.

SECTION 6.

INTERNAL INTERNAL

INTERNAL

ADJUSTMENTSADJUSTMENTS

ADJUSTMENTS

These calibration potentiometers are located on the

control chip board.

6.16.1

6.1

OFFSET AND GAINOFFSET AND GAIN

OFFSET AND GAIN

Customer CalibrationCustomer Calibration

Customer Calibration

The OFFSET and GAIN potentiometers are used to

fine tune the customer’s automatic control speed ref-

erence input with the drive when the REMOTE mode

is selected. These adjustment potentiometers do not

function in the LOCAL mode. See Section 8 for proper

start-up and calibration procedures.

6.26.2

6.2

MINIMUM AND MAXIMUM SPEEDMINIMUM AND MAXIMUM SPEED

MINIMUM AND MAXIMUM SPEED

Customer CalibrationCustomer Calibration

Customer Calibration

The MIN SPEED and MAX SPEED calibration poten-

tiometers are used to set the operating speed range in

the LOCAL and the REMOTE speed control modes.

See Section 8 for proper start-up and calibration pro-

cedures.

6.36.3

6.3

MAXIMUM EXTENDED SPEEDMAXIMUM EXTENDED SPEED

MAXIMUM EXTENDED SPEED

Customer Calibration--Optional FeatureCustomer Calibration--Optional Feature

Customer Calibration--Optional Feature

The MAX EXT SPEED potentiometer is used to cali-

brate the maximum speed above 100% which you wish

to operate at. This circuit is not functional unless the

EXT SPD switch on switch SW2 is in the on position

and the drive is in the REMOTE mode. The extended

frequency range is up to 120 Hz.

DANGER

OPERATING THE MOTOR AND ITSOPERATING THE MOTOR AND ITS

OPERATING THE MOTOR AND ITS

DRIVEN EQUIPMENT AT SPEEDSDRIVEN EQUIPMENT AT SPEEDS

DRIVEN EQUIPMENT AT SPEEDS

ABOVE THE MOTOR NAMEPLATEABOVE THE MOTOR NAMEPLATE

ABOVE THE MOTOR NAMEPLATE

RPM CAN CAUSE DAMAGE TO THERPM CAN CAUSE DAMAGE TO THE

RPM CAN CAUSE DAMAGE TO THE

DRIVEN EQUIPMENT OR THE AP-DRIVEN EQUIPMENT OR THE AP-

DRIVEN EQUIPMENT OR THE AP-

PLICATION RELATED COMPO-PLICATION RELATED COMPO-

PLICATION RELATED COMPO-

NENTS. DO NOT OPERATE IN THENENTS. DO NOT OPERATE IN THE

NENTS. DO NOT OPERATE IN THE

EXTENDED SPEED MODE WITH-EXTENDED SPEED MODE WITH-

EXTENDED SPEED MODE WITH-

OUT PRIOR VERIFICATION THATOUT PRIOR VERIFICATION THAT

OUT PRIOR VERIFICATION THAT

YOUR SYSTEM AND EQUIPMENTYOUR SYSTEM AND EQUIPMENT

YOUR SYSTEM AND EQUIPMENT

CAN WITHSTAND THE ADDED CA-CAN WITHSTAND THE ADDED CA-

CAN WITHSTAND THE ADDED CA-

PACITY CAUSED BY INCREASINGPACITY CAUSED BY INCREASING

PACITY CAUSED BY INCREASING

THE MOTOR RPM ABOVE BASETHE MOTOR RPM ABOVE BASE

THE MOTOR RPM ABOVE BASE

SPEED.SPEED.

SPEED.

6.46.4

6.4

OVERLOADOVERLOAD

OVERLOAD

Factory CalibrationFactory Calibration

Factory Calibration

The 1703 Series is designed to provide motor overload

protection. The overload is factory set for 105% of

drive’s rated output. This setting should not be

changed without factory authorization.

6.56.5

6.5

CURRENT LIMITCURRENT LIMIT

CURRENT LIMIT

Factory CalibrationFactory Calibration

Factory Calibration

Full CW rotation of this potentiometer calibrates the

drive for a maximum output current capacity of 110%

of the drive’s nameplated output current. This adjust-

ment can be utilized to calibrate the maximum drive

output current clamp threshold to a lower setpoint

level. This setting should not be changed without fac-

tory authorization.

WARNING

IF THE CURRENT LIMIT POTENTI-IF THE CURRENT LIMIT POTENTI-

IF THE CURRENT LIMIT POTENTI-

OMETER IS TO BE ADJUSTED TO AOMETER IS TO BE ADJUSTED TO A

OMETER IS TO BE ADJUSTED TO A

LOWER SETPOINT, THE OVER-LOWER SETPOINT, THE OVER-

LOWER SETPOINT, THE OVER-

LOAD POTENTIOMETER LOAD POTENTIOMETER

LOAD POTENTIOMETER

MUSTMUST

MUST

FIRSTFIRST

FIRST

BE ADJUSTED TO A LOWER BE ADJUSTED TO A LOWER

BE ADJUSTED TO A LOWER

SETPOINT. FAILURE TO ADJUSTSETPOINT. FAILURE TO ADJUST

SETPOINT. FAILURE TO ADJUST

THE OVERLOAD POTENTIOME-THE OVERLOAD POTENTIOME-

THE OVERLOAD POTENTIOME-

TER FIRST CAN DEFEAT THETER FIRST CAN DEFEAT THE

TER FIRST CAN DEFEAT THE

OVERLOAD PROTECTION CIR-OVERLOAD PROTECTION CIR-

OVERLOAD PROTECTION CIR-

CUIT OF THE DRIVE.CUIT OF THE DRIVE.

CUIT OF THE DRIVE.

6.66.6

6.6

I COMPI COMP

I COMP

Factory CalibrationFactory Calibration

Factory Calibration

The I COMP potentiometer is used to provide in-

creased starting torque to initiate motor rotation on a

start command. This circuit is not functional unless

the HI-TORQUE switch on switch SW2 is in the ON

position. When this potentiometer is fully CW the

drive will deliver up to 125% motor torque for starting

the motor. This setting should not be changed without

factory authorization.

NOTE: THE HI-TORQUE SWITCHNOTE: THE HI-TORQUE SWITCH

NOTE: THE HI-TORQUE SWITCH

SHOULD BE IN THE OFF POSI-SHOULD BE IN THE OFF POSI-

SHOULD BE IN THE OFF POSI-

TION UNLESS THE MOTOR TION UNLESS THE MOTOR

TION UNLESS THE MOTOR

RE-RE-

RE-

QUIRESQUIRES

QUIRES

ADDITIONAL TORQUE ADDITIONAL TORQUE

ADDITIONAL TORQUE

FOR STARTING.FOR STARTING.

FOR STARTING.

NOTE: IF THE HI-TORQUE CIR-NOTE: IF THE HI-TORQUE CIR-

NOTE: IF THE HI-TORQUE CIR-

CUIT IS REQUIRED, START YOURCUIT IS REQUIRED, START YOUR

CUIT IS REQUIRED, START YOUR

CALIBRATIONS WITH THE I COMPCALIBRATIONS WITH THE I COMP

CALIBRATIONS WITH THE I COMP

POTENTIOMETER IN THE FULLYPOTENTIOMETER IN THE FULLY

POTENTIOMETER IN THE FULLY

CCW POSITION AND ADJUST ITCCW POSITION AND ADJUST IT

CCW POSITION AND ADJUST IT

CW ONLY TO THE POINT WHENCW ONLY TO THE POINT WHEN

CW ONLY TO THE POINT WHEN

THE MOTOR WILL START.THE MOTOR WILL START.

THE MOTOR WILL START.

Brand	Graham
Model	1703 Series
Category	DC Drives
Language	English

Graham 1703 Series User Manual

Table of Contents

Questions and Answers:

Graham 1703 Series Specifications